Bump version to 5.0.0

`<a>` tags in headings are set to apply the style of `%anchor` in `module.scss` and `common.scss`.
Therefore, if I put a link in a heading, the link will have the same style as the anchor,
which means that the font size becomes smaller and the link will not be displayed unless I hover the mouse over it.
My suggestion is to set an `anchor` class for the `<a>` tag of the anchor and apply style settings to the `anchor` class, not to the `a` tag.

.github/CONTRIBUTING.md

@@ -1,6 +1,6 @@
 # How to Contribute
 
-I want to thank you for sparing a time to improve this project! Here are some guidelines for contributing：
+I want to thank you for sparing time to improve this project! Here are some guidelines for contributing：
 
 To ensure that the blog design is not confused, this project does not accept suggestions for design changes, such as color scheme, fonts, typography, etc. If your request is about an enhancement, it is recommended to first submit a [`Feature Request`](https://github.com/cotes2020/jekyll-theme-chirpy/issues/new?labels=enhancement&template=feature_request.md) issue to discuss whether your idea fits the project. 
 
@@ -13,4 +13,4 @@ Generally, contribute to the project by:
 
 ---
 
-:tada: Your volunteering will make the open source world more beautiful, thanks again! :tada:
+:tada: Your volunteering will make the open-source world more beautiful, thanks again! :tada:

.github/FUNDING.yml

@@ -1 +1,2 @@
-custom: ['https://www.buymeacoffee.com/coteschung', 'https://cotes.gitee.io/alipay-wechat-donation']
+ko_fi: coteschung
+custom: https://cotes.gitee.io/alipay-wechat-donation

.github/ISSUE_TEMPLATE/bug_report.md

@@ -6,12 +6,15 @@ about: Create a report to help us improve
 <!-- NOTE: Please maintain all sections, otherwise the issue will be automatically closed :) -->
 
 ## Checklist
-<!-- Please complete the following list of tasks, and then check it by change the "[ ]" to "[x]" -->
-- [ ] I have read the [tutorials](https://chirpy.cotes.info/categories/tutorial/) and know the correct effect of the functional design.
-- [ ] There are no similar reports on existing issues (including closed ones).
-- [ ] I found the bug on the latest code of `master` branch.
+
+<!-- Please complete the following list of tasks, and then check it by changing the "[ ]" to "[x]" -->
+
+- [ ] I have read the [tutorials](https://cotes2020.github.io/chirpy-demo/categories/tutorial/) and know the correct effect of the functional design.
+- [ ] There are no similar reports on [existing issues](https://github.com/cotes2020/jekyll-theme-chirpy/issues?q=is%3Aissue) (including closed ones).
+- [ ] I found the bug on the latest code of the `master` branch.
 
 ## Describe the bug
+
 <!-- A clear and concise description of what the bug is. -->
 
 ### To Reproduce
@@ -25,25 +28,31 @@ Steps to reproduce the behavior:
 -->
 
 ### Expected behavior
+
 <!-- A clear and concise description of what you expected to happen. -->
 
 ### Screenshots
+
 <!-- If applicable, add screenshots to help explain your problem. -->
 
 ### Software
+
 <!-- Please complete the following information -->
 - Ruby version: <!-- by running: `ruby -v` -->
 - Gem version: <!-- by running: `gem -v`-->
 - Bundler version: <!-- by running: `bundle -v`-->
 - Jekyll version: <!-- by running: `bundle list | grep " jekyll "` -->
+- Theme version: <!-- by running: `gem list | grep jekyll-theme-chirpy` -->
 
 ### Desktop
+
 <!-- If necessary, uncomment and fill in the following list:
 - OS: [e.g. macOS 10.15.6]
 - Browser: [e.g. Chrome 85.0.4183.83 (64-bit)]
 -->
 
 ### Smartphone
+
 <!-- If necessary, uncomment and fill in the following list:
 - Device: [e.g. iPhone 6]
 - OS: [e.g. iOS 13.6.1]
@@ -51,4 +60,5 @@ Steps to reproduce the behavior:
 -->
 
 ### Additional context
+
 <!-- Add any other context about the problem here. -->

.github/ISSUE_TEMPLATE/feature_request.md

@@ -7,24 +7,29 @@ labels: enhancement
 <!-- NOTE: Please maintain all sections, otherwise the issue will be automatically closed :) -->
 
 ## Checklist
-<!-- Please complete the following list of tasks, and then check it by change the "[ ]" to "[x]" -->
+
+<!-- Please complete the following list of tasks, and then check it by changing the "[ ]" to "[x]" -->
 - [ ] I have read the [contributing guidelines](https://github.com/cotes2020/jekyll-theme-chirpy/blob/master/.github/CONTRIBUTING.md).
-- [ ] There are no similar request on existing issues (including closed ones).
+- [ ] There is no similar request on [existing issues](https://github.com/cotes2020/jekyll-theme-chirpy/issues?q=is%3Aissue) (including closed ones).
 - [ ] I have read the [project progress](https://github.com/cotes2020/jekyll-theme-chirpy/projects) and know the current progress of the project.
 - [ ] I was in the `master` branch of the latest code.
 
 
 ## Is your feature request related to a problem? Please describe
+
 <!-- A clear and concise description of what the problem is. Ex. I'm always frustrated when [...] -->
 
 
 ## Describe the solution you'd like
+
 <!-- A clear and concise description of what you want to happen. -->
 
 
 ## Describe alternatives you've considered
+
 <!-- A clear and concise description of any alternative solutions or features you've considered. -->
 
 
 ## Additional context
+
 <!-- Add any other context or screenshots about the feature request here. -->

.github/ISSUE_TEMPLATE/question.md

@@ -1,6 +1,6 @@
 ---
 name: Question
-about: Ask what ever you want
+about: Ask whatever you want
 labels: question
 ---
 
@@ -8,12 +8,13 @@ labels: question
 
 ## Checklist
 
-<!-- Please complete the following list of tasks, and then check it by change the "[ ]" to "[x]" -->
+<!-- Please complete the following list of tasks, and then check it by changing the "[ ]" to "[x]" -->
 
-- [ ] I have read the [tutorials](https://chirpy.cotes.info/categories/tutorial/) and know the correct effect of the functional design.
-- [ ] There are no similar question on existing issues (including closed ones).
-- [ ] I searched the Internet for related problems, but still couldn't solve it.
-- [ ] My question is based on the latest code of `master` branch.
+- [ ] I have read the [newlest tutorials](https://cotes2020.github.io/chirpy-demo/categories/tutorial/) and know the correct effect of the functional design.
+- [ ] There is no similar question on [existing issues](https://github.com/cotes2020/jekyll-theme-chirpy/issues?q=is%3Aissue) (including closed ones).
+- [ ] I have tried to find the answer on [Jekyll Forum](https://talk.jekyllrb.com/) and [StackOverflow](https://stackoverflow.com/questions/tagged/jekyll).
+- [ ] My question is based on the latest code of the `master` branch.
 
 ## Description
-<!-- Please describe your question in detial. -->
+
+<!-- Please describe your question in detail. -->

.github/PULL_REQUEST_TEMPLATE.md

@@ -2,9 +2,9 @@
 
 <!-- 
 Please include a summary of the change and which issue is fixed. Please also include relevant motivation and context. List any dependencies that are required for this change.
--->
 
 e.g. Fixes #(issue)
+-->
 
 ## Type of change
 
@@ -22,23 +22,21 @@ Please select the desired item checkbox and change it to "[x]", then delete opti
 Please describe the tests that you ran to verify your changes. Provide instructions so we can reproduce. Please also list any relevant details for your test configuration
 -->
 
-- [ ] I have run `bash ./tools/test.sh --build` (at the root of the project) locally and passed
+- [ ] I have run `bash ./tools/deploy.sh --dry-run` (at the root of the project) locally and passed
 - [ ] I have tested this feature in the browser
 
 ### Test Configuration
 
-- Browerser type & version:
+- Browser type & version:
 - Operating system:
-- Bundler version:
-- Ruby version:
-- Jekyll version:
+- Ruby version: <!-- by running: `ruby -v` -->
+- Bundler version: <!-- by running: `bundle -v`-->
+- Jekyll version: <!-- by running: `bundle list | grep " jekyll "` -->
 
 ### Checklist
+
 <!-- Select checkboxes by change the "[ ]" to "[x]" -->
-- [ ] My code follows the [Google style guidelines](https://google.github.io/styleguide/)
-- [ ] I have performed a self-review of my own code
-- [ ] I have commented my code, particularly in hard-to-understand areas
+- [ ] I have performed a self-review of my code
+- [ ] I have commented on my code, particularly in hard-to-understand areas
 - [ ] I have made corresponding changes to the documentation
 - [ ] My changes generate no new warnings
-- [ ] I have added tests that prove my fix is effective or that my feature works
-- [ ] Any dependent changes have been merged and published in downstream modules

.github/workflows/ci.yml

@@ -24,9 +24,6 @@ jobs:
       matrix:
         os: [ubuntu-latest, macos-latest]
 
-    env:
-      GEMS_PATH: ~/vendor/bundle
-
     steps:
       - name: Checkout
         uses: actions/checkout@v2
@@ -34,29 +31,10 @@ jobs:
           fetch-depth: 0  # for posts's lastmod
 
       - name: Setup Ruby
-        uses: actions/setup-ruby@v1
+        uses: ruby/setup-ruby@v1
         with:
           ruby-version: 2.7
-
-      - name: Bundle Caching
-        uses: actions/cache@v2
-        with:
-          path: ${{ env.GEMS_PATH }}
-          key: ${{ runner.os }}-gems-${{ hashFiles('**/Gemfile.lock') }}
-          restore-keys: |
-            ${{ runner.os }}-gems-
-
-      - name: Bundle Install
-        run: |
-          bundle config path ${{ env.GEMS_PATH }}
-          bundle install --jobs 4 --retry 3
-
-      - name: Build Site
-        env:
-          JEKYLL_ENV: production
-        run: |
-          bundle exec jekyll b
+          bundler-cache: true
 
       - name: Test Site
-        run: |
-          bash tools/test.sh
+        run: bash tools/deploy.sh --dry-run

.github/workflows/issue-interceptor.yml

@@ -0,0 +1,18 @@
+name: Intercept bad issues
+
+on:
+  issues:
+    types: [opened, edited]
+
+jobs:
+  auto_close_issues:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v1
+      - name: Auto close issues that did not follow template
+        uses: lucasbento/auto-close-issues@v1.0.2
+        with:
+          github-token: ${{ secrets.GITHUB_TOKEN }}
+          issue-close-message: ":wave: Hi @${issue.user.login},\n\nThis issue is being automatically closed because it does not follow the issue template. Please DO NOT open another similar issue, try to edit the current issue according to the template, then it will be reopened automatically."
+          closed-issues-label: "🙁 Not following issue template"

.github/workflows/issue-pr-interceptor.yml

@@ -1,20 +0,0 @@
-name: "Intercept bad issue/PRs"
-
-on:
-  issues:
-    types: [opened, reopened]
-  pull_request:
-    types: [opened, reopened]
-
-jobs:
-  autoclose:
-    runs-on: ubuntu-latest
-    steps:
-    - name: Auto close issues/pr that did not follow template
-      uses: roots/issue-closer@v1.1
-      with:
-        repo-token: ${{ secrets.GITHUB_TOKEN }}
-        issue-pattern: "\\[x\\] I have read"
-        issue-close-message: ":wave: Hi @${issue.user.login},\n\nThis issue is being automatically closed because it does not follow the issue template."
-        pr-pattern: "\\[x\\] Bug|\\[x\\] New feat|\\[x\\] Break|\\[x\\] Doc|@dependabot"
-        pr-close-message: ":wave: Hi @${pull_request.user.login},\n\nThis PR is being automatically closed because it does not follow the PR template."

.github/workflows/pages-deploy.yml.hook

@@ -13,9 +13,6 @@ jobs:
 
     runs-on: ubuntu-latest
 
-    env:
-      GEMS_PATH: ~/vendor/bundle
-
     steps:
       - name: Checkout
         uses: actions/checkout@v2
@@ -23,46 +20,10 @@ jobs:
           fetch-depth: 0  # for posts's lastmod
 
       - name: Setup Ruby
-        uses: actions/setup-ruby@v1
+        uses: ruby/setup-ruby@v1
         with:
           ruby-version: 2.7
-
-      - name: Bundle Caching
-        uses: actions/cache@v2
-        with:
-          path: ${{ env.GEMS_PATH }}
-          key: ${{ runner.os }}-gems-${{ hashFiles('**/Gemfile.lock') }}
-          restore-keys: |
-            ${{ runner.os }}-gems-
-
-      - name: Bundle Install
-        run: |
-          bundle config path ${{ env.GEMS_PATH }}
-          bundle install --jobs 4 --retry 3
-
-      - name: Check baseurl
-        run: |
-          baseurl="$(grep '^baseurl:' _config.yml | sed "s/.*: *//;s/['\"]//g;s/#.*//")"
-          if [[ -n $baseurl ]]; then
-            echo "BASE_URL=$baseurl" >> $GITHUB_ENV
-          fi
-
-      - name: Build Site
-        env:
-          JEKYLL_ENV: production
-        run: |
-          bundle exec jekyll b -d "_site$BASE_URL"
-
-      - name: Test Site
-        run: |
-          bash tools/test.sh
+          bundler-cache: true
 
       - name: Deploy
-        run: |
-          if [[ -n $BASE_URL ]]; then
-            mv _site$BASE_URL _site-rename
-            rm -rf _site
-            mv _site-rename _site
-          fi
-
-          bash tools/deploy.sh
+        run: bash tools/deploy.sh

.gitignore

@@ -1,15 +1,17 @@
 # hidden files
 .*
-!.github
+!.git*
+!.editorconfig
+!.nojekyll
+!.travis.yml
 
-# jekyll cache
+# bundler cache
 _site
 vendor
+Gemfile.lock
 
 # rubygem
 *.gem
-# yard docs
-doc
 
 # npm dependencies
 node_modules

.nojekyll

@@ -0,0 +1 @@
+

.travis.yml

@@ -1,25 +1,42 @@
 os: linux
 dist: bionic
 
-language: ruby
-rvm: 2.7.0
-
-cache: bundler
-
-addons:
-  apt:
-    packages:
-      - libcurl4-openssl-dev # required to avoid SSL error (for htmlproofer)
-
-script:
-  - git -C "$HOME" clone "$BUILDER_REPO" --depth=1 -q
-  - eval "$BUILD_CMD"
+language: minimal
 
 branches:
-  only: production
+  only:
+    - /^release\/(\d)+(\.(\d)+){1}$/
 
-git:
-  depth: false # for posts lastmod
+jobs:
+  include:
+    - name: Deploy
+      language: ruby
+      rvm: 2.7.0
+      addons:
+        apt:
+          packages:
+            # required to avoid SSL error (for htmlproofer)
+            - libcurl4-openssl-dev
+      cache:
+        directories:
+          - $TRAVIS_BUILD_DIR/vendor/bundle
+      before_install:
+        # match the Gemfile.lock, travis' bundler is 2.1.2
+        - gem install bundler:2.2.4
+        - bundle config path 'vendor/bundle'
+      install:
+        # overriding to drop the travis `--development` flag
+        - bundle install --jobs=3 --retry=3
+      script:
+        - eval "$BUILD_CMD"
+      git:
+        depth: false # for posts' lastmod
+
+    - name: Flush Starter
+      script: eval "$FLUSH_STARTER"
+
+before_script:
+  - git -C "$HOME" clone "$BUILDER_REPO" --depth=1 -q
 
 notifications:
   email:

404.html

@@ -1,20 +0,0 @@
----
-layout: page
-title: "404: Page not found"
-permalink: /404.html
-
-redirect_from:
-  - /norobots/
-  - /assets/
-  - /tabs/
-  - /categories/
-  - /tags/
-  - /posts/
-
-dynamic_title: true
----
-
-<div class="lead">
-  <p>Sorry, we've misplaced that URL or it's pointing to something that doesn't exist. </p>
-  <p><a href="{{ site.baseurl }}/">Head back Home</a> to try finding it again, or search for it on the <a href="{{ site.baseurl }}/tabs/archives">Archives page</a>.</p>
-</div>

Gemfile

@@ -1,15 +1,8 @@
+# frozen_string_literal: true
+
 source "https://rubygems.org"
 
-gem "jekyll", "~> 4.1"
-
-# plugins
-group :jekyll_plugins do
-  gem "jekyll-paginate", "~> 1.1"
-  gem "jekyll-redirect-from", "~> 0.16"
-  gem "jekyll-seo-tag", "~> 2.7"
-  gem "jekyll-archives", "~> 2.2"
-  gem "jekyll-sitemap", "~> 1.4"
-end
+gemspec
 
 group :test do
   gem "html-proofer", "~> 3.18"
@@ -24,3 +17,6 @@ end
 
 # Performance-booster for watching directories on Windows
 gem "wdm", "~> 0.1.1", :install_if => Gem.win_platform?
+
+# Jekyll <= 4.2.0 compatibility with Ruby 3.0
+gem "webrick", "~> 1.7"

Gemfile.lock

@@ -1,113 +0,0 @@
-GEM
-  remote: https://rubygems.org/
-  specs:
-    addressable (2.7.0)
-      public_suffix (>= 2.0.2, < 5.0)
-    colorator (1.1.0)
-    concurrent-ruby (1.1.7)
-    em-websocket (0.5.2)
-      eventmachine (>= 0.12.9)
-      http_parser.rb (~> 0.6.0)
-    ethon (0.12.0)
-      ffi (>= 1.3.0)
-    eventmachine (1.2.7)
-    ffi (1.14.2)
-    forwardable-extended (2.6.0)
-    html-proofer (3.18.5)
-      addressable (~> 2.3)
-      mercenary (~> 0.3)
-      nokogumbo (~> 2.0)
-      parallel (~> 1.3)
-      rainbow (~> 3.0)
-      typhoeus (~> 1.3)
-      yell (~> 2.0)
-    http_parser.rb (0.6.0)
-    i18n (1.8.5)
-      concurrent-ruby (~> 1.0)
-    jekyll (4.2.0)
-      addressable (~> 2.4)
-      colorator (~> 1.0)
-      em-websocket (~> 0.5)
-      i18n (~> 1.0)
-      jekyll-sass-converter (~> 2.0)
-      jekyll-watch (~> 2.0)
-      kramdown (~> 2.3)
-      kramdown-parser-gfm (~> 1.0)
-      liquid (~> 4.0)
-      mercenary (~> 0.4.0)
-      pathutil (~> 0.9)
-      rouge (~> 3.0)
-      safe_yaml (~> 1.0)
-      terminal-table (~> 2.0)
-    jekyll-archives (2.2.1)
-      jekyll (>= 3.6, < 5.0)
-    jekyll-paginate (1.1.0)
-    jekyll-redirect-from (0.16.0)
-      jekyll (>= 3.3, < 5.0)
-    jekyll-sass-converter (2.1.0)
-      sassc (> 2.0.1, < 3.0)
-    jekyll-seo-tag (2.7.1)
-      jekyll (>= 3.8, < 5.0)
-    jekyll-sitemap (1.4.0)
-      jekyll (>= 3.7, < 5.0)
-    jekyll-watch (2.2.1)
-      listen (~> 3.0)
-    kramdown (2.3.0)
-      rexml
-    kramdown-parser-gfm (1.1.0)
-      kramdown (~> 2.0)
-    liquid (4.0.3)
-    listen (3.3.3)
-      rb-fsevent (~> 0.10, >= 0.10.3)
-      rb-inotify (~> 0.9, >= 0.9.10)
-    mercenary (0.4.0)
-    mini_portile2 (2.5.0)
-    nokogiri (1.11.1)
-      mini_portile2 (~> 2.5.0)
-      racc (~> 1.4)
-    nokogumbo (2.0.4)
-      nokogiri (~> 1.8, >= 1.8.4)
-    parallel (1.20.1)
-    pathutil (0.16.2)
-      forwardable-extended (~> 2.6)
-    public_suffix (4.0.6)
-    racc (1.5.2)
-    rainbow (3.0.0)
-    rb-fsevent (0.10.4)
-    rb-inotify (0.10.1)
-      ffi (~> 1.0)
-    rexml (3.2.4)
-    rouge (3.26.0)
-    safe_yaml (1.0.5)
-    sassc (2.4.0)
-      ffi (~> 1.9)
-    terminal-table (2.0.0)
-      unicode-display_width (~> 1.1, >= 1.1.1)
-    thread_safe (0.3.6)
-    typhoeus (1.4.0)
-      ethon (>= 0.9.0)
-    tzinfo (1.2.9)
-      thread_safe (~> 0.1)
-    tzinfo-data (1.2020.6)
-      tzinfo (>= 1.0.0)
-    unicode-display_width (1.7.0)
-    wdm (0.1.1)
-    yell (2.2.2)
-
-PLATFORMS
-  ruby
-
-DEPENDENCIES
-  html-proofer (~> 3.18)
-  jekyll (~> 4.1)
-  jekyll-archives (~> 2.2)
-  jekyll-paginate (~> 1.1)
-  jekyll-redirect-from (~> 0.16)
-  jekyll-seo-tag (~> 2.7)
-  jekyll-sitemap (~> 1.4)
-  tzinfo (~> 1.2)
-  tzinfo-data
-  wdm (~> 0.1.1)
-
-BUNDLED WITH
-   2.2.4

README.md

@@ -1,98 +1,66 @@
-# Chirpy
+<div align="right">
 
-Language: English | [简体中文](https://github.com/cotes2020/jekyll-theme-chirpy/blob/master/docs/README.zh-CN.md)
+  EN / [中文](https://github.com/cotes2020/jekyll-theme-chirpy/blob/master/docs/README.zh-CN.md)
 
-[![Build Status](https://github.com/cotes2020/jekyll-theme-chirpy/workflows/build/badge.svg?branch=master&event=push)](https://github.com/cotes2020/jekyll-theme-chirpy/actions?query=branch%3Amaster+event%3Apush)
-[![Codacy Badge](https://api.codacy.com/project/badge/Grade/8220b926db514f13afc3f02b7f884f4b)](https://app.codacy.com/manual/cotes2020/jekyll-theme-chirpy?utm_source=github.com&utm_medium=referral&utm_content=cotes2020/jekyll-theme-chirpy&utm_campaign=Badge_Grade_Dashboard)
-[![GitHub license](https://img.shields.io/github/license/cotes2020/jekyll-theme-chirpy.svg)](https://github.com/cotes2020/jekyll-theme-chirpy/blob/master/LICENSE)
-[![996.icu](https://img.shields.io/badge/link-996.icu-%23FF4D5B.svg)](https://996.icu)
+</div>
 
-A minimal, sidebar, responsive web design Jekyll theme that focuses on text presentation. Designed to help you record and share your knowledge easily. [Live Demo »](https://chirpy.cotes.info)
+<div align="center">
 
-[![Devices Mockup](https://cdn.jsdelivr.net/gh/cotes2020/chirpy-images/commons/devices-mockup.png)](https://chirpy.cotes.info)
+  # Chirpy Jekyll Theme
 
-## Table of Contents
+  A minimal, responsive, and powerful Jekyll theme for presenting professional writing.
 
-- [Features](#features)
-- [Installation](#installation)
-- [Prerequisites](#prerequisites)
-- [Usage](#usage)
-- [Contributing](#contributing)
-- [Credits](#credits)
-- [Supporting](#supporting)
-- [License](#license)
+  [![Gem Version](https://img.shields.io/gem/v/jekyll-theme-chirpy?color=brightgreen)](https://rubygems.org/gems/jekyll-theme-chirpy)
+  [![Build Status](https://github.com/cotes2020/jekyll-theme-chirpy/workflows/build/badge.svg?branch=master&event=push)](https://github.com/cotes2020/jekyll-theme-chirpy/actions?query=branch%3Amaster+event%3Apush)
+  [![Codacy Badge](https://app.codacy.com/project/badge/Grade/4e556876a3c54d5e8f2d2857c4f43894)](https://www.codacy.com/gh/cotes2020/jekyll-theme-chirpy/dashboard?utm_source=github.com&amp;utm_medium=referral&amp;utm_content=cotes2020/jekyll-theme-chirpy&amp;utm_campaign=Badge_Grade)
+  [![GitHub license](https://img.shields.io/github/license/cotes2020/jekyll-theme-chirpy.svg)](https://github.com/cotes2020/jekyll-theme-chirpy/blob/master/LICENSE)
+  [![996.icu](https://img.shields.io/badge/link-996.icu-%23FF4D5B.svg)](https://996.icu)
+
+  [**Live Demo →**](https://cotes2020.github.io/chirpy-demo)
+
+  [![Devices Mockup](https://cdn.jsdelivr.net/gh/cotes2020/chirpy-images@f4e0354b674f65a53b8917f0f786ed2956898cc1/commons/devices-mockup.png)](https://cotes2020.github.io/chirpy-demo)
+
+</div>
 
 ## Features
 
+- Localized Layout
+- Configurable Theme Mode
 - Pinned Posts
-- Configurable theme mode
-- Double-level Categories
-- Last modified date for posts
+- Hierarchical Categories
+- Last Modified Date for Posts
 - Table of Contents
-- Automatically recommend related posts
-- Syntax highlighting
-- Mathematical expressions
-- Mermaid diagram & flowchart
+- Automatically Recommend Related Posts
+- Syntax Highlighting
+- Mathematical Expressions
+- Mermaid Diagram & Flowchart
 - Search
 - Atom Feeds
 - Disqus Comments
 - Google Analytics
-- GA Pageviews reporting (Advanced)
-- SEO and Performance Optimization
+- GA Pageviews Reporting (Advanced)
+- SEO & Performance Optimization
 
 ## Prerequisites
 
-Follow the [Jekyll Docs](https://jekyllrb.com/docs/installation/) to complete the installation of `Ruby`, `RubyGems`, `Jekyll` and `Bundler`.
+Follow the instructions in the [Jekyll Docs](https://jekyllrb.com/docs/installation/) to complete the installation of `Ruby`, `RubyGems`, `Jekyll`, and `Bundler`.
 
 ## Installation
 
-There are two ways to get the theme:
+### Creating a New Site
 
-  - Install from [RubyGems](https://rubygems.org/gems/jekyll-theme-chirpy)
-  - Fork from GitHub
+There are two ways to create a new repository for this theme:
 
-### Install From Rubygems
+- [**Using the Chirpy Starter**](#option-1-using-the-chirpy-starter) - Easy to upgrade, isolates irrelevant project files so you can focus on writing.
+- [**Forking on GitHub**](#option-2-forking-on-github) - Convenient for custom development, but difficult to upgrade. Unless you are familiar with Jekyll and are determined to tweak or contribute to this project, this approach is not recommended.
 
-Add this line to your Jekyll site's `Gemfile`:
+#### Option 1. Using the Chirpy Starter
 
-```ruby
-gem "jekyll-theme-chirpy"
-```
+Create a new repository from the [**Chirpy Starter**][use-starter] and name it `<GH_USERNAME>.github.io`, where `GH_USERNAME` represents your GitHub username.
 
-And add this line to your Jekyll site's `_config.yml`:
+#### Option 2. Forking on GitHub
 
-```yaml
-theme: jekyll-theme-chirpy
-```
-
-And then execute:
-
-```console
-$ bundle
-```
-
-Finally, copy the extra files (refer to the [starter project][starter] for the detailed file directory structure) from the theme's gem to your Jekyll site, and append all the variables of the theme's `_config.yml` to your Jekyll site.
-
-> **Hint**: To locate the theme’s gem, execute:
->
-```console
-$ bundle info --path jekyll-theme-chirpy
-```
-
-Or you can [use the starter template][use-starter] to create a Jekyll site to save time copying contents from theme's gem.
-
-[starter]: https://github.com/cotes2020/chirpy-starter
-[use-starter]: https://github.com/cotes2020/chirpy-starter/generate
-
-### Fork From GitHub
-
-[Fork **Chirpy**](https://github.com/cotes2020/jekyll-theme-chirpy/fork) from GitHub and clone your fork to local.
-
-Install gem dependencies by:
-
-```console
-$ bundle
-```
+[Fork **Chirpy**](https://github.com/cotes2020/jekyll-theme-chirpy/fork) on GitHub and rename it to `<GH_USERNAME>.github.io`. Please note that the default branch code is in development.  If you want the site to be stable, please switch to the [latest tag][latest-tag] and start writing.
 
 And then execute:
 
@@ -100,20 +68,29 @@ And then execute:
 $ bash tools/init.sh
 ```
 
-> **Note**: If you don't plan to deploy your site on GitHub Pages, append parameter option `--no-gh` at the end of the above command.
+> **Note**: If you don't want to deploy your site on GitHub Pages, append option `--no-gh` at the end of the above command.
 
-What it does is:
+The above command will:
 
-  1. Remove some files or directories from your repository:
+1. Removes some files or directories from your repository:
 
-      - `.travis.yml`
-      - files under `_posts`
-      - folder `docs`
+    - `.travis.yml`
+    - files under `_posts`
+    - folder `docs`
 
-  2. If you use the `--no-gh` option, the directory `.github` will be deleted. Otherwise, setup the GitHub Action workflow by removing extension `.hook` of `.github/workflows/pages-deploy.yml.hook`, and then remove the other files and directories in folder `.github`.
+2. If the option `--no-gh` is provided, the directory `.github` will be deleted. Otherwise, set up the GitHub Action workflow by removing the extension `.hook` of `.github/workflows/pages-deploy.yml.hook`, and then remove the other files and directories in the folder `.github`.
 
-  3. Automatically create a commit to save the changes.
+3. Removes item `Gemfile.lock` from `.gitignore`.
 
+4. Creates a new commit to save the changes automatically.
+
+### Installing Dependencies
+
+Before running for the first time, go to the root directory of your site, and install dependencies as follows:
+
+```console
+$ bundle
+```
 
 ## Usage
 
@@ -121,10 +98,16 @@ What it does is:
 
 Update the variables of `_config.yml` as needed. Some of them are typical options:
 
-  - `url`
-  - `avatar`
-  - `timezone`
-  - `theme_mode`
+- `url`
+- `avatar`
+- `timezone`
+- `lang`
+
+### Customing Stylesheet
+
+If you need to customize the stylesheet, copy the theme's `assets/css/style.scss` to the same path on your Jekyll site, and then add the custom style at the end of the style file.
+
+Starting from [`v4.1.0`][chirpy-4.1.0], if you want to overwrite the SASS variables defined in `_sass/addon/variables.scss`, create a new file `_sass/variables-hook.scss` and assign new values to the target variable in it.
 
 ### Running Local Server
 
@@ -136,58 +119,62 @@ $ bundle exec jekyll s
 
 Or run the site on Docker with the following command:
 
-```terminal
+```console
 $ docker run -it --rm \
     --volume="$PWD:/srv/jekyll" \
     -p 4000:4000 jekyll/jekyll \
     jekyll serve
 ```
 
-Open a browser and visit to _<http://localhost:4000>_.
+After a while, the local service will be published at _<http://127.0.0.1:4000>_.
 
 ### Deployment
 
-Before the deployment begins, checkout the file `_config.yml` and make sure the `url` is configured correctly. Furthermore, if you prefer the [**project site**](https://help.github.com/en/github/working-with-github-pages/about-github-pages#types-of-github-pages-sites) and don't use a custom domain, or you want to visit your website with a base url on a web server other than **GitHub Pages**, remember to change the `baseurl` to your project name that starting with a slash, e.g, `/project-name`.
+Before the deployment begins, check out the file `_config.yml` and make sure the `url` is configured correctly. Furthermore, if you prefer the [**project site**](https://help.github.com/en/github/working-with-github-pages/about-github-pages#types-of-github-pages-sites) and don't use a custom domain, or you want to visit your website with a base URL on a web server other than **GitHub Pages**, remember to change the `baseurl` to your project name that starts with a slash, e.g, `/project-name`.
 
 Now you can choose ONE of the following methods to deploy your Jekyll site.
 
-#### Deploy on GitHub Pages
+#### Deploy by Using Github Actions
 
-For security reasons, GitHub Pages build runs on `safe` mode, which restricts us from using plugins to generate additional page files. Therefore, we can use **GitHub Actions** to build the site, store the built site files on a new branch, and use that branch as the source of the GH Pages service.
+For security reasons, GitHub Pages build runs on `safe` mode, which restricts us from using plugins to generate additional page files. Therefore, we can use **GitHub Actions** to build the site, store the built site files on a new branch, and use that branch as the source of the GitHub Pages service.
 
 Quickly check the files needed for GitHub Actions build:
 
-  1. Ensure your Jekyll site has the file `/.github/workflows/pages-deploy.yml`. Otherwise, create a new one and fill in the contents of the [workflow file][workflow], and the value of the `on.push.branches` should be the same as your repo's default branch name.
+- Ensure your Jekyll site has the file `.github/workflows/pages-deploy.yml`. Otherwise, create a new one and fill in the contents of the [sample file][workflow], and the value of the `on.push.branches` should be the same as your repo's default branch name.
 
-  2. Ensuer your Jekyll site has file `/tools/test.sh` and `/tools/deploy.sh`. Otherwise, copy them from this repo to your Jekyll site.
+- Ensure your Jekyll site has file `tools/deploy.sh`. Otherwise, copy it from here to your Jekyll site.
 
-[workflow]:https://github.com/cotes2020/jekyll-theme-chirpy/blob/master/.github/workflows/pages-deploy.yml.hook
+- Furthermore, if you have committed `Gemfile.lock` to the repo, and your runtime system is not Linux, don't forget to update the platform list in the lock file:
 
-Next, rename your repoistory to `<GH-USERNAME>.github.io` on GitHub.
+  ```console
+  $ bundle lock --add-platform x86_64-linux
+  ```
 
-And then publish your Jekyll site by:
+After the above steps, rename your repository to `<GH_USERNAME>.github.io` on GitHub.
 
-  1. Push any commit to remote to trigger the GitHub Actions workflow. Once the build is complete and successful, a new remote branch named `gh-pages` will appear to store the built site files.
+Now publish your Jekyll site by:
 
-  2. Browse to your repo's landing page on GitHub and select the branch `gh-pages` as the [publishing source](https://docs.github.com/en/github/working-with-github-pages/configuring-a-publishing-source-for-your-github-pages-site) throught _Settings_ → _Options_ → _GitHub Pages_:
+1. Push any commit to remote to trigger the GitHub Actions workflow. Once the build is complete and successful, a new remote branch named `gh-pages` will appear to store the built site files.
 
-      ![gh-pages-sources](https://cdn.jsdelivr.net/gh/cotes2020/chirpy-images/posts/20190809/gh-pages-sources.png)
+2. Browse to your repository on GitHub. Select the tab _Settings_, then click _Pages_ in the left navigation bar, and then in the section **Source** of _GitHub Pages_, select the `/(root)` directory of branch `gh-pages` as the [publishing source][pages-src]. Remember to click <kbd>Save</kbd> before leaving.
 
-  3. Visit your website at the address indicated by GitHub.
+    ![gh-pages-sources](https://cdn.jsdelivr.net/gh/cotes2020/chirpy-images@f4e0354b674f65a53b8917f0f786ed2956898cc1/posts/20190809/gh-pages-sources.png)
 
-#### Deploy on Other Platforms
+3. Visit your website at the address indicated by GitHub.
 
-On platforms other than GitHub, we cannot enjoy the convenience of **GitHub Actions**. Therefore, we should build the site locally (or on some other 3rd-party CI platform) and then put the site files on the server.
+#### Manually Build and Deploy
 
-Go to the root of the source project, build your site by:
+On self-hosted servers, you cannot enjoy the convenience of **GitHub Actions**. Therefore, you should build the site on your local machine and then upload the site files to the server.
+
+Go to the root of the source project, and build your site as follows:
 
 ```console
 $ JEKYLL_ENV=production bundle exec jekyll b
 ```
 
-Or build the site with Docker by:
+Or build the site on Docker:
 
-```terminal
+```console
 $ docker run -it --rm \
     --env JEKYLL_ENV=production \
     --volume="$PWD:/srv/jekyll" \
@@ -195,12 +182,33 @@ $ docker run -it --rm \
     jekyll build
 ```
 
-Unless you specified the output path, the generated site files will be placed in folder `_site` of the project's root directory. Now you should upload those files to your web server.
+Unless you specified the output path, the generated site files will be placed in folder `_site` of the project's root directory. Now you should upload those files to the target server.
 
+### Upgrading
+
+It depends on how you use the theme:
+
+- If you are using the theme gem (there will be `gem "jekyll-theme-chirpy"` in the `Gemfile`), editing the `Gemfile` and update the version number of the theme gem, for example:
+
+  ```diff
+  - gem "jekyll-theme-chirpy", "~> 3.2", ">= 3.2.1"
+  + gem "jekyll-theme-chirpy", "~> 3.3", ">= 3.3.0"
+  ```
+
+  And then execute the following command:
+
+  ```console
+  $ bundle update jekyll-theme-chirpy
+  ```
+
+  As the version upgrades, the critical files (for details, see the [Startup Template][starter]) and configuration options will change. Please refer to the [Upgrade Guide](https://github.com/cotes2020/jekyll-theme-chirpy/wiki/Upgrade-Guide) to keep your repo's files in sync with the latest version of the theme.
+
+- If you forked from the source project (there will be `gemspec` in the `Gemfile` of your site), then merge the [latest upstream tags][latest-tag] into your Jekyll site to complete the upgrade.
+The merge is likely to conflict with your local modifications. Please be patient and careful to resolve these conflicts.
 
 ## Documentation
 
-For more details and the better reading experience, please check out the [tutorials on demo site](https://chirpy.cotes.info/categories/tutorial/). In the meanwhile, a copy of the tutorial is also available on the [Wiki](https://github.com/cotes2020/jekyll-theme-chirpy/wiki).
+For more details and a better reading experience, please check out the [tutorials on the demo site](https://cotes2020.github.io/chirpy-demo/categories/tutorial/). In the meanwhile, a copy of the tutorial is also available on the [Wiki](https://github.com/cotes2020/jekyll-theme-chirpy/wiki). Please note that the tutorials on the demo website or Wiki are based on the latest release, and the features of `master` branch are usually ahead of the documentation.
 
 ## Contributing
 
@@ -208,20 +216,32 @@ The old saying, "Two heads are better than one." Consequently, welcome to report
 
 ## Credits
 
-This theme is mainly built with [Jekyll](https://jekyllrb.com/) ecosystem, [Bootstrap](https://getbootstrap.com/), [Font Awesome](https://fontawesome.com/) and some other wonderful tools (their copyright information can be found in the relevant files).
+This theme is mainly built with [Jekyll](https://jekyllrb.com/) ecosystem, [Bootstrap](https://getbootstrap.com/), [Font Awesome](https://fontawesome.com/) and some other wonderful tools (their copyright information can be found in the relevant files). The avatar and favicon design come from [Clipart Max](https://www.clipartmax.com/middle/m2i8b1m2K9Z5m2K9_ant-clipart-childrens-ant-cute/).
 
 :tada: Thanks to all the volunteers who contributed to this project, their GitHub IDs are on [this list](https://github.com/cotes2020/jekyll-theme-chirpy/graphs/contributors). Also, I won't forget those guys who submitted the issues or unmerged PR because they reported bugs, shared ideas or inspired me to write more readable documentation.
 
-Also, thank [JetBrains][JB] for providing the open source license.
+Last but not least, thank [JetBrains][jb] for providing the open source license.
 
-[![JB-logo](https://cdn.jsdelivr.net/gh/cotes2020/chirpy-images/commons/jetbrains.svg)][JB]
+## Sponsoring
 
-[JB]:https://www.jetbrains.com/?from=jekyll-theme-chirpy
+If you like this theme or find it helpful, please consider sponsoring me, because it will encourage and help me better maintain the project, I will be very grateful!
 
-## Supporting
-
-If you enjoy this theme or find it helpful, please consider becoming my sponsor, I'd really appreciate it! Click the button <kbd>:heart: Sponsor</kbd> at the top of the [Home Page](https://github.com/cotes2020/jekyll-theme-chirpy) and choose a link that suits you to donate; this will encourage and help me better maintain the project.
+[![Ko-fi](https://img.shields.io/badge/-Buy%20Me%20a%20Coffee-ff5f5f?logo=ko-fi&logoColor=white)](https://ko-fi.com/coteschung)
+[![Wechat Pay](https://img.shields.io/badge/-Tip%20Me%20on%20WeChat-brightgreen?logo=wechat&logoColor=white)][cn-donation]
+[![Alipay](https://img.shields.io/badge/-Tip%20Me%20on%20Alipay-blue?logo=alipay&logoColor=white)][cn-donation]
 
 ## License
 
 This work is published under [MIT](https://github.com/cotes2020/jekyll-theme-chirpy/blob/master/LICENSE) License.
+
+[starter]: https://github.com/cotes2020/chirpy-starter
+[use-starter]: https://github.com/cotes2020/chirpy-starter/generate
+[workflow]: https://github.com/cotes2020/jekyll-theme-chirpy/blob/master/.github/workflows/pages-deploy.yml.hook
+[chirpy-4.1.0]: https://github.com/cotes2020/jekyll-theme-chirpy/releases/tag/v4.1.0
+[pages-src]: https://docs.github.com/en/github/working-with-github-pages/configuring-a-publishing-source-for-your-github-pages-site
+[latest-tag]: https://github.com/cotes2020/jekyll-theme-chirpy/tags
+
+<!-- ReadMe links -->
+
+[jb]: https://www.jetbrains.com/?from=jekyll-theme-chirpy
+[cn-donation]: https://cotes.gitee.io/alipay-wechat-donation/

_config.yml

@@ -1,7 +1,23 @@
 # The Site Configuration
 
+# Import the theme
+theme: jekyll-theme-chirpy
+
+# Change the following value to '/PROJECT_NAME' ONLY IF your site type is GitHub Pages Project sites
+# and doesn't have a custom domain.
+baseurl: ''
+
+# The language of the webpage › http://www.lingoes.net/en/translator/langcode.htm
+# If it has the same name as one of the files in folder `_data/locales`, the layout language will also be changed,
+# otherwise, the layout language will use the default value of 'en'.
+lang: en
+
+# Change to your timezone › http://www.timezoneconverter.com/cgi-bin/findzone/findzone
+timezone: Asia/Shanghai
+
 # jekyll-seo-tag settings › https://github.com/jekyll/jekyll-seo-tag/blob/master/docs/usage.md
-# --------------------------
+# ↓ --------------------------
+
 title: Chirpy                          # the main title
 
 tagline: A text-focused Jekyll theme   # it will display as the sub-title
@@ -14,8 +30,6 @@ description: >-                        # used by seo meta and the atom feed
 # fill in the protocol & hostname for your site, e.g., 'https://username.github.io'
 url: ''
 
-author: your_full_name                  # change to your full name
-
 github:
   username: github_username             # change to your github username
 
@@ -23,7 +37,9 @@ twitter:
   username: twitter_username            # change to your twitter username
 
 social:
-  name: your_full_name                  # it will shows as the copyright owner in Footer
+  # Change to your full name.
+  # It will be displayed as the default author of the posts and the copyright owner in the Footer
+  name: your_full_name
   email: example@doamin.com             # change to your email address
   links:
     # The first element serves as the copyright owner's link
@@ -34,31 +50,16 @@ social:
     # - https://www.linkedin.com/in/username
 
 google_site_verification: google_meta_tag_verification # change to your verification string
-# --------------------------
 
+# ↑ --------------------------
 
-# Only if your site type is GitHub Project sites and doesn't have a custom domain,
-# change below value to '/projectname'.
-baseurl: ''
-
-# Change to your timezone › http://www.timezoneconverter.com/cgi-bin/findzone/findzone
-timezone: Asia/Shanghai
 
 google_analytics:
-  id: ''          # Fill with your Google Analytics ID
+  id: ''              # fill in your Google Analytics ID
+  # Google Analytics pageviews report settings
   pv:
-    # The Google Analytics pageviews switch.
-    # DO NOT enable it unless you know how to deploy the Google Analytics superProxy.
-    enabled: false
-    # the next options only valid when `google_analytics.pv` is enabled.
-    proxy_url: ''
-    proxy_endpoint: ''
-    cache: false  # pv data local cache, good for the users from GFW area.
-
-disqus:
-  comments: false  # boolean type, the global switch for posts comments.
-  shortname: ''    # Fill with your Disqus shortname. › https://help.disqus.com/en/articles/1717111-what-s-a-shortname
-
+    proxy_endpoint:   # fill in the Google Analytics superProxy endpoint of Google App Engine
+    cache_path:       # the local PV cache data, friendly to visitors from GFW region
 
 # Prefer color scheme setting.
 #
@@ -69,7 +70,6 @@ disqus:
 # Available options:
 #
 #     light  - Use the light color scheme
-#
 #     dark   - Use the dark color scheme
 #
 theme_mode:   # [light|dark]
@@ -79,16 +79,28 @@ theme_mode:   # [light|dark]
 # will be added to all image (site avatar & posts' images) paths starting with '/'
 #
 # e.g. 'https://cdn.com'
-img_cdn: ''
+img_cdn: 'https://cdn.jsdelivr.net/gh/cotes2020/chirpy-images@f4e0354b674f65a53b8917f0f786ed2956898cc1'
 
 # the avatar on sidebar, support local or CORS resources
-avatar: https://cdn.jsdelivr.net/gh/cotes2020/chirpy-images/commons/avatar.jpg
+avatar: '/commons/avatar.jpg'
 
 # boolean type, the global switch for ToC in posts.
 toc: true
 
+comments:
+  active:         # The global switch for posts comments, e.g., 'disqus'.  Keep it empty means disable
+  # The active options are as follows:
+  disqus:
+    shortname:    # fill with the Disqus shortname. › https://help.disqus.com/en/articles/1717111-what-s-a-shortname
+  # utterances settings › https://utteranc.es/
+  utterances:
+    repo:         # <gh-username>/<repo>
+    issue_term:   # < url | pathname | title | ...>
+
 paginate: 10
 
+# ------------ The following options are not recommended to be modified ------------------
+
 kramdown:
   syntax_highlighter: rouge
   syntax_highlighter_opts:   # Rouge Options › https://github.com/jneen/rouge#full-options
@@ -100,16 +112,11 @@ kramdown:
       line_numbers: true
       start_line: 1
 
-# DO NOT change this unless you're a Pro user on Jekyll and Web development,
-# or you think you're smart enough to change other relevant URLs within this template.
-permalink: /posts/:title/
-
 collections:
   tabs:
     output: true
     sort_by: order
 
-
 defaults:
   -
     scope:
@@ -119,55 +126,21 @@ defaults:
       layout: post
       comments: true    # Enable comments in posts.
       toc: true         # Display TOC column in posts.
-      breadcrumb:
-        -
-          label: Posts
-          url: /
+      # DO NOT modify the following parameter unless you are confident enough
+      # to update the code of all other post links in this project.
+      permalink: /posts/:title/
   -
     scope:
       path: _drafts
     values:
       comments: false
-  -
-    scope:
-      path: index.html
-    values:
-      breadcrumb:
-        -
-          label: Posts
-  -
-    scope:
-      path: tags
-    values:
-      breadcrumb:
-        -
-          label: Home
-          url: /
-        -
-          label: Tags
-          url: /tabs/tags/
-  -
-    scope:
-      path: categories
-    values:
-      breadcrumb:
-        -
-          label: Home
-          url: /
-        -
-          label: Categories
-          url: /tabs/categories/
   -
     scope:
       path: ''
       type: tabs             # see `site.collections`
     values:
       layout: page
-      dynamic_title: true    # Hide title in mobile screens.
-      breadcrumb:
-        -
-          label: Home
-          url: /
+      permalink: /:title/
 
 sass:
   style: compressed
@@ -182,17 +155,15 @@ compress_html:
     envs: [development]
 
 exclude:
-  - vendor
-  - Gemfile.lock
-  - Gemfile
+  - '*.gem'
+  - '*.gemspec'
   - tools
   - docs
   - README.md
   - LICENSE
   - gulpfile.js
   - node_modules
-  - package.json
-  - package-lock.json
+  - package*.json
 
 jekyll-archives:
   enabled: [categories, tags]

_data/contact.yml

@@ -2,7 +2,7 @@
 
 -
   type: github
-  icon: 'fab fa-github-alt'
+  icon: 'fab fa-github'
 -
   type: twitter
   icon: 'fab fa-twitter'

_data/date_format.yml

@@ -1,7 +0,0 @@
-#  The date format
-
-tooltip: "%a, %b %e, %Y, %l:%M %p %z"
-
-post:
-  long: "%b %e, %Y"
-  short: "%b %e"

_data/label.yml

@@ -1,19 +0,0 @@
-# The label text of site.
-
-panel:
-  lastmod: Recent Update
-  trending_tags: Trending Tags
-  toc: Contents
-
-post:
-  relate_posts: Further Reading
-  share: Share
-  button:
-    next: Newer
-    previous: Older
-
-search_hint: Search   # text show on search bar
-
-pin_prompt: Pinned    # pinned prompt
-
-read_time_unit: min   # see posts' time to read

_data/locales/en.yml

@@ -0,0 +1,91 @@
+# The layout text of site
+
+# ----- Commons label -----
+
+layout:
+  post: Post
+  category: Category
+  tag: Tag
+
+# The tabs of sidebar
+tabs:
+  # format: <filename_without_extension>: <value>
+  home: Home
+  categories: Categories
+  tags: Tags
+  archives: Archives
+  about: About
+
+# the text displayed in the search bar & search results
+search:
+  hint: search
+  cancel: Cancel
+  no_results: Oops! No result founds.
+
+panel:
+  lastmod: Recent Update
+  trending_tags: Trending Tags
+  toc: Contents
+
+#  The liquid date format › http://strftime.net/
+date_format:
+  tooltip: '%a, %b %e, %Y, %l:%M %p %z'
+  post:
+    long: '%b %e, %Y'
+    short: '%b %e'
+    archive_month: '%b'
+
+copyright:
+  # Shown at the bottom of the post
+  license:
+    template: This post is licensed under :LICENSE_NAME by the author.
+    name: CC BY 4.0
+    link: https://creativecommons.org/licenses/by/4.0/
+
+  # Displayed in the footer
+  brief: Some rights reserved.
+  verbose: >-
+    Except where otherwise noted, the blog posts on this site are licensed
+    under the Creative Commons Attribution 4.0 International (CC BY 4.0) License by the author.
+
+meta: Powered by :PLATFORM with :THEME theme.
+
+not_found:
+  statment: Sorry, we've misplaced that URL or it's pointing to something that doesn't exist.
+  hint_template: :HEAD_BAK to try finding it again, or search for it on the :ARCHIVES_PAGE.
+  head_back: Head back Home
+  archives_page: Archives page
+
+# ----- Posts related labels -----
+
+post:
+  written_by: By
+  posted: Posted
+  updated: Updated
+  timeago:
+    day: days ago
+    hour: hours ago
+    minute: minutes ago
+    just_now: just now
+  words: words
+  pageview_measure: views
+  read_time:
+    unit: min
+    prompt: read
+  relate_posts: Further Reading
+  share: Share
+  button:
+    next: Newer
+    previous: Older
+    copy_code:
+      succeed: Copied!
+    share_link:
+      title: Copy link
+      succeed: Link copied successfully!
+  # pinned prompt of posts list on homepage
+  pin_prompt: Pinned
+
+# categories page
+categories:
+  category_measure: categories
+  post_measure: posts

_data/locales/id-ID.yml

@@ -0,0 +1,91 @@
+# The layout text of site
+
+# ----- Commons label -----
+
+layout:
+  post: Postingan
+  category: Kategori
+  tag: Tagar
+
+# The tabs of sidebar
+tabs:
+  # format: <filename_without_extension>: <value>
+  home: Beranda
+  categories: Kategori
+  tags: Tagar
+  archives: Arsip
+  about: Tentang
+
+# the text displayed in the search bar & search results
+search:
+  hint: Cari
+  cancel: Batal
+  no_results: Ups! Tidak ada hasil yang ditemukan.
+
+panel:
+  lastmod: Postingan Terbaru
+  trending_tags: Tagar Terpopuler
+  toc: Konten
+
+#  The liquid date format › http://strftime.net/
+date_format:
+  tooltip: "%a, %e %b, %Y, %l:%M %p"
+  post:
+    long: "%e %b, %Y"
+    short: "%e %b"
+    archive_month: "%b"
+
+copyright:
+  # Shown at the bottom of the post
+  license:
+    template: Postingan ini dilisensikan di bawah :LICENSE_NAME oleh penulis.
+    name: CC BY 4.0
+    link: https://creativecommons.org/licenses/by/4.0/
+
+  # Displayed in the footer
+  brief: Sebagian konten dilindungi.
+  verbose: >-
+    Kecuali jika dinyatakan, Postingan blog di situs ini dilisensikan
+    di bawah Lisensi Creative Commons Attribution 4.0 International (CC BY 4.0) oleh penulis.
+
+meta: Didukung oleh :PLATFORM dengan tema :THEME.
+
+not_found:
+  statment: Maaf, kami gagal menemukan URL itu atau memang mengarah ke sesuatu yang tidak ada.
+  hint_template: :HEAD_BAK untuk mencoba mencari kembali, atau cari di :ARCHIVES_PAGE.
+  head_back: Kembali ke Beranda
+  archives_page: Halaman Arsip
+
+# ----- Posts related labels -----
+
+post:
+  written_by: Oleh
+  posted: Diterbitkan
+  updated: Diperbarui
+  timeago:
+    day: hari yang lalu
+    hour: jam yang lalu
+    minute: menit yang lalu
+    just_now: baru saja
+  words: kata
+  pageview_measure: dilihat
+  read_time:
+    unit: menit
+    prompt: baca
+  relate_posts: Postingan Lainya
+  share: Bagikan
+  button:
+    next: Terbaru
+    previous: Terlama
+    copy_code:
+      succeed: Disalin!
+    share_link:
+      title: Salin tautan
+      succeed: Tautan berhasil disalin!
+  # pinned prompt of posts list on homepage
+  pin_prompt: Disematkan
+
+# categories page
+categories:
+  category_measure: kategori
+  post_measure: Postingan

_data/locales/ko-KR.yml

@@ -0,0 +1,91 @@
+# The layout text of site
+
+# ----- Commons label -----
+
+layout:
+  post: 포스트
+  category: 카테고리
+  tag: 태그
+
+# The tabs of sidebar
+tabs:
+  # format: <filename_without_extension>: <value>
+  home: 홈
+  categories: 카테고리
+  tags: 태그
+  archives: 아카이브
+  about: 정보
+
+# the text displayed in the search bar & search results
+search:
+  hint: 검색
+  cancel: 취소
+  no_results: 검색 결과가 없습니다.
+
+panel:
+  lastmod: 최근 업데이트
+  trending_tags: 인기 태그
+  toc: 바로가기
+
+#  The liquid date format › http://strftime.net/
+date_format:
+  tooltip: '%F, %R %z'
+  post:
+    long: '%Y년 %m월 %d일'
+    short: '%m월 %d일'
+    archive_month: '%b월'
+
+copyright:
+  # Shown at the bottom of the post
+  license:
+    template: 이 기사는 저작권자의 :LICENSE_NAME 라이센스를 따릅니다.
+    name: CC BY 4.0
+    link: https://creativecommons.org/licenses/by/4.0/
+
+  # Displayed in the footer
+  brief: 일부 권리 보유
+  verbose: >-
+    명시되지 않는 한 이 사이트의 블로그 게시물은 작성자의
+    Creative Commons Attribution 4.0 International(CC BY 4.0) 라이선스에 따라 사용이 허가되었습니다.
+
+meta: Powered by :PLATFORM with :THEME theme.
+
+not_found:
+  statment: 해당 URL은 존재하지 않습니다.
+  hint_template: :HEAD_BAK을 눌러 다시 찾거나 :ARCHIVES_PAGE에서 검색해 주세요.
+  head_back: 홈으로 돌아가기
+  archives_page: 아카이브 페이지
+
+# ----- Posts related labels -----
+
+post:
+  written_by: By
+  posted: 게시
+  updated: 업데이트
+  timeago:
+    day: 일 전
+    hour: 시간 전
+    minute: 분 전
+    just_now: 방금
+  words: 단어
+  pageview_measure: 조회
+  read_time:
+    unit: 분
+    prompt: 읽는 시간
+  relate_posts: 관련된 글
+  share: 공유하기
+  button:
+    next: 다음 글
+    previous: 이전 글
+    copy_code:
+      succeed: 복사되었습니다!
+    share_link:
+      title: 링크 복사하기
+      succeed: 링크가 복사되었습니다!
+  # pinned prompt of posts list on homepage
+  pin_prompt: 핀
+
+# categories page
+categories:
+  category_measure: 카테고리
+  post_measure: 포스트

_data/locales/zh-CN.yml

@@ -0,0 +1,90 @@
+# The layout text of site
+
+# ----- Commons label -----
+
+layout:
+  post: 文章
+  category: 分类
+  tag: 标签
+
+# The tabs of sidebar
+tabs:
+  # format: <filename_without_extension>: <value>
+  home: 首页
+  categories: 分类
+  tags: 标签
+  archives: 归档
+  about: 关于
+
+# the text displayed in the search bar & search results
+search:
+  hint: 搜索
+  cancel: 取消
+  no_results: 搜索结果为空
+
+panel:
+  lastmod: 最近更新
+  trending_tags: 热门标签
+  toc: 文章内容
+
+#  The liquid date format › http://strftime.net/
+date_format:
+  tooltip: '%F, %R %z'
+  post:
+    long: '%F'
+    short: '%m-%d'
+    archive_month: '%m月'
+
+copyright:
+  # Shown at the bottom of the post
+  license:
+    template: 本文由作者按照 :LICENSE_NAME 进行授权
+    name: CC BY 4.0
+    link: https://creativecommons.org/licenses/by/4.0/
+
+  # Displayed in the footer
+  brief: 保留部分权利。
+  verbose: >-
+    除非另有说明，本网站上的博客文章均由作者按照知识共享署名 4.0 国际 (CC BY 4.0) 许可协议进行授权。
+
+meta: 本站由 :PLATFORM 生成，采用 :THEME 主题。
+
+not_found:
+  statment: 抱歉，我们放错了该 URL，或者它指向了不存在的内容。
+  hint_template: :HEAD_BAK尝试再次查找它，或在:ARCHIVES_PAGE上搜索它。
+  head_back: 返回主页
+  archives_page: 归档页面
+
+# ----- Posts related labels -----
+
+post:
+  written_by: 作者
+  posted: 发表于
+  updated: 更新于
+  timeago:
+    day: 天前
+    hour: 小时前
+    minute: 分钟前
+    just_now: 刚刚
+  words: 字
+  pageview_measure: 次浏览
+  read_time:
+    unit: 分钟
+    prompt: 阅读
+  relate_posts: 相关文章
+  share: 分享
+  button:
+    next: 下一篇
+    previous: 上一篇
+    copy_code:
+      succeed: 已复制！
+    share_link:
+      title:  分享链接
+      succeed: 链接已复制！
+  # pinned prompt of posts list on homepage
+  pin_prompt: 顶置
+
+# categories page
+categories:
+  category_measure: 个分类
+  post_measure: 篇文章

_data/rights.yml

@@ -1,11 +0,0 @@
-#  License data
-
-license:
-  name: CC BY 4.0
-  link: "https://creativecommons.org/licenses/by/4.0/"
-
-brief: Some rights reserved.
-
-verbose: >-
-  Except where otherwise noted, the blog posts on this site are licensed
-  under the Creative Commons Attribution 4.0 International (CC BY 4.0) License by the author.

_includes/comments.html

@@ -0,0 +1,5 @@
+<!--  The comments switcher -->
+{% if page.comments and site.comments.active %}
+  {% capture path %}comments/{{ site.comments.active }}.html{% endcapture %}
+  {% include {{ path }} %}
+{% endif %}

_includes/comments/disqus.html

@@ -0,0 +1,54 @@
+<!--
+  The Disqus lazy loading.
+-->
+<div id="disqus_thread" class="pt-2 pb-2">
+  <p class="text-center text-muted small">
+    Comments powered by <a href="https://disqus.com/">Disqus</a>.
+  </p>
+</div>
+
+<script type="text/javascript">
+
+  var disqus_config = function () {
+    this.page.url = '{{ page.url | absolute_url }}';
+    this.page.identifier = '{{ page.url }}';
+  };
+
+  /* Lazy loading */
+
+  var disqus_observer = new IntersectionObserver(function (entries) {
+    if(entries[0].isIntersecting) {
+        (function () {
+            var d = document, s = d.createElement('script');
+            s.src = 'https://{{ site.comments.disqus.shortname }}.disqus.com/embed.js';
+            s.setAttribute('data-timestamp', +new Date());
+            (d.head || d.body).appendChild(s);
+        })();
+
+        disqus_observer.disconnect();
+    }
+  }, { threshold: [0] });
+
+  disqus_observer.observe(document.querySelector('#disqus_thread'));
+
+  /* Auto switch theme */
+
+  function reloadDisqus() {
+    /* Disqus hasn't been loaded */
+    if (typeof DISQUS === "undefined") {
+      return;
+    }
+
+    if (document.readyState == 'complete') {
+      DISQUS.reset({ reload: true, config: disqus_config });
+    }
+  }
+
+  const modeToggle = document.querySelector(".mode-toggle");
+
+  if (typeof modeToggle !== "undefined") {
+    /*  modeToggle.addEventListener('click', reloadDisqus); // not pretty for 'color-scheme'  */
+    window.matchMedia('(prefers-color-scheme: dark)').addEventListener('change', reloadDisqus);
+  }
+
+</script>

_includes/comments/utterances.html

@@ -0,0 +1,51 @@
+<!-- https://utteranc.es/ -->
+<script src="https://utteranc.es/client.js"
+        repo="{{ site.comments.utterances.repo }}"
+        issue-term="{{ site.comments.utterances.issue_term }}"
+        crossorigin="anonymous"
+        async>
+</script>
+
+<script type="text/javascript">
+  $(function() {
+    const origin = "https://utteranc.es";
+    const iframe = "iframe.utterances-frame";
+    const lightTheme = "github-light";
+    const darkTheme = "github-dark";
+    let initTheme = lightTheme;
+
+    if ($("html[mode=dark]").length > 0
+        || ($("html[mode]").length == 0
+            && window.matchMedia("(prefers-color-scheme: dark)").matches)) {
+      initTheme = darkTheme;
+    }
+
+    addEventListener("message", (event) => {
+      let theme;
+
+      /* credit to <https://github.com/utterance/utterances/issues/170#issuecomment-594036347> */
+      if (event.origin === origin) {
+        /* page initial */
+        theme = initTheme;
+
+      } else if (event.source === window && event.data &&
+            event.data.direction === ModeToggle.ID) {
+        /* global theme mode changed */
+        const mode = event.data.message;
+        theme = (mode === ModeToggle.DARK_MODE ? darkTheme : lightTheme);
+
+      } else {
+        return;
+      }
+
+      const message = {
+        type: "set-theme",
+        theme: theme
+      };
+
+      const utterances = document.querySelector(iframe).contentWindow;
+      utterances.postMessage(message, origin);
+    });
+
+  });
+</script>

_includes/css-selector.html

@@ -8,3 +8,8 @@
   <link rel="stylesheet"
     href="https://cdn.jsdelivr.net/gh/afeld/bootstrap-toc@1.0.1/dist/bootstrap-toc.min.css">
 {% endif %}
+
+{% if page.layout == 'page' or page.layout == 'post' %}
+  <!-- Manific Popup -->
+  <link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/magnific-popup@1.1.0/dist/magnific-popup.min.css">
+{% endif %}

_includes/disqus.html

@@ -1,25 +0,0 @@
-<!--
-  The Disqus lazy loading.
-  Powered by: <https://github.com/osvaldasvalutis/disqusLoader.js>
--->
-
-<div id="disqus" class="pt-2 pb-2">
-  <p class="text-center text-muted pb-5">
-    Loading comments from <a href="https://disqus.com/">Disqus</a> ...
-  </p>
-</div>
-
-<script src="{{ '/assets/js/lib/jquery.disqusloader.min.js' | relative_url }}"></script>
-<script>
-  const options = {
-    scriptUrl: '//{{ site.disqus.shortname }}.disqus.com/embed.js',
-
-    disqusConfig: function() {
-      this.page.title = '{{ page.title }}';
-      this.page.url = '{{ page.url | absolute_url }}';
-      this.page.identifier = '{{ page.url }}';
-    }
-  };
-
-  $.disqusLoader('#disqus', options);
-</script>

_includes/favicons.html

@@ -1,32 +1,17 @@
 <!--
   The Favicons for Web, Android, Microsoft, and iOS (iPhone and iPad) Apps
-  Generated by: https://www.favicon-generator.org/
+  Generated by: https://realfavicongenerator.net/
 -->
 
-{% capture icon_url %}{{ site.baseurl }}/assets/img/favicons{% endcapture %}
+{% capture favicon_path %}{{ '/assets/img/favicons' | relative_url }}{% endcapture %}
 
-<link rel="shortcut icon" href="{{ icon_url }}/favicon.ico" type="image/x-icon">
-<link rel="icon" href="{{ icon_url }}/favicon.ico" type="image/x-icon">
-
-<link rel="apple-touch-icon" href="{{ icon_url }}/apple-icon.png">
-<link rel="apple-touch-icon" href="{{ icon_url }}/apple-icon-precomposed.png">
-<link rel="apple-touch-icon" sizes="57x57" href="{{ icon_url }}/apple-icon-57x57.png">
-<link rel="apple-touch-icon" sizes="60x60" href="{{ icon_url }}/apple-icon-60x60.png">
-<link rel="apple-touch-icon" sizes="72x72" href="{{ icon_url }}/apple-icon-72x72.png">
-<link rel="apple-touch-icon" sizes="76x76" href="{{ icon_url }}/apple-icon-76x76.png">
-<link rel="apple-touch-icon" sizes="114x114" href="{{ icon_url }}/apple-icon-114x114.png">
-<link rel="apple-touch-icon" sizes="120x120" href="{{ icon_url }}/apple-icon-120x120.png">
-<link rel="apple-touch-icon" sizes="144x144" href="{{ icon_url }}/apple-icon-144x144.png">
-<link rel="apple-touch-icon" sizes="152x152" href="{{ icon_url }}/apple-icon-152x152.png">
-<link rel="apple-touch-icon" sizes="180x180" href="{{ icon_url }}/apple-icon-180x180.png">
-
-<link rel="icon" type="image/png" sizes="192x192"  href="{{ icon_url }}/android-icon-192x192.png">
-<link rel="icon" type="image/png" sizes="32x32" href="{{ icon_url }}/favicon-32x32.png">
-<link rel="icon" type="image/png" sizes="96x96" href="{{ icon_url }}/favicon-96x96.png">
-<link rel="icon" type="image/png" sizes="16x16" href="{{ icon_url }}/favicon-16x16.png">
-
-<link rel="manifest" href="{{ icon_url }}/manifest.json">
-<meta name='msapplication-config' content='{{ icon_url }}/browserconfig.xml'>
-<meta name="msapplication-TileColor" content="#ffffff">
-<meta name="msapplication-TileImage" content="{{ icon_url }}/ms-icon-144x144.png">
+<link rel="apple-touch-icon" sizes="180x180" href="{{ favicon_path }}/apple-touch-icon.png">
+<link rel="icon" type="image/png" sizes="32x32" href="{{ favicon_path }}/favicon-32x32.png">
+<link rel="icon" type="image/png" sizes="16x16" href="{{ favicon_path }}/favicon-16x16.png">
+<link rel="manifest" href="{{ favicon_path }}/site.webmanifest">
+<link rel="shortcut icon" href="{{ favicon_path }}/favicon.ico">
+<meta name="apple-mobile-web-app-title" content="{{ site.title }}">
+<meta name="application-name" content="{{ site.title }}">
+<meta name="msapplication-TileColor" content="#da532c">
+<meta name="msapplication-config" content="{{ favicon_path }}/browserconfig.xml">
 <meta name="theme-color" content="#ffffff">

_includes/footer.html

@@ -3,26 +3,33 @@
 -->
 
 <footer class="d-flex w-100 justify-content-center">
-  <div class="d-flex justify-content-between align-items-center">
+  <div class="d-flex justify-content-between align-items-center text-muted">
     <div class="footer-left">
       <p class="mb-0">
         © {{ 'now' | date: "%Y" }}
         <a href="{{ site.social.links[0] }}">{{ site.social.name }}</a>.
-        {% if site.data.rights.brief %}
+        {% if site.data.locales[lang].copyright.brief %}
         <span data-toggle="tooltip" data-placement="top"
-          title="{{ site.data.rights.verbose }}">{{ site.data.rights.brief }}</span>
+          title="{{ site.data.locales[lang].copyright.verbose }}">{{ site.data.locales[lang].copyright.brief }}</span>
         {% endif %}
       </p>
     </div>
 
     <div class="footer-right">
       <p class="mb-0">
-        Powered by
-        <a href="https://jekyllrb.com" target="_blank" rel="noopener">Jekyll</a>
-        with
-        <a href="https://github.com/cotes2020/jekyll-theme-chirpy"
-          target="_blank" rel="noopener">Chirpy</a>
-        theme.
+        {% capture _platform %}
+          <a href="https://jekyllrb.com" target="_blank" rel="noopener">Jekyll</a>
+        {% endcapture %}
+
+        {% capture _theme %}
+          <a href="https://github.com/cotes2020/jekyll-theme-chirpy" target="_blank" rel="noopener">Chirpy</a>
+        {% endcapture %}
+
+        {{ site.data.locales[lang].meta
+          | default: 'Powered by :PLATFORM with :THEME theme.'
+          | replace: ':PLATFORM', _platform | replace: ':THEME', _theme
+        }}
+
       </p>
     </div>
 

_includes/head.html

@@ -7,19 +7,21 @@
   <meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no">
 
   {% if page.layout == 'home' or page.layout == 'post' %}
-    <meta name="pv-cache-enabled" content="{{ site.google_analytics.pv.enabled }}">
 
-    {% if site.google_analytics.pv.enabled %}
-      {% if site.google_analytics.pv.proxy_endpoint != ''
-        and site.google_analytics.pv.proxy_endpoint %}
-        <meta name="pv-proxy-endpoint" content="{{ site.google_analytics.pv.proxy_endpoint }}">
-      {% endif %}
-
-      {% if site.google_analytics.pv.cache %}
-        <meta name="pv-cache-data" content="{{ '/assets/js/data/pageviews.json' | relative_url }}">
-      {% endif %}
+    <!-- i18n for `_javascript/utils/timeago.js` -->
+    <meta name="day-prompt" content="{{ site.data.locales[lang].post.timeago.day }}">
+    <meta name="hour-prompt" content="{{ site.data.locales[lang].post.timeago.hour }}">
+    <meta name="minute-prompt" content="{{ site.data.locales[lang].post.timeago.minute }}">
+    <meta name="justnow-prompt" content="{{ site.data.locales[lang].post.timeago.just_now }}">
 
+    {% if site.google_analytics.pv.proxy_endpoint %}
+      <meta name="pv-proxy-endpoint" content="{{ site.google_analytics.pv.proxy_endpoint }}">
     {% endif %}
+
+    {% if site.google_analytics.pv.cache_path %}
+      <meta name="pv-cache-path" content="{{ site.google_analytics.pv.cache_path | relative_url }}">
+    {% endif %}
+
   {% endif %}
 
   {% seo title=false %}
@@ -45,36 +47,29 @@
     <link rel="preconnect" href="https://www.googletagmanager.com" crossorigin="anonymous">
     <link rel="dns-prefetch" href="https://www.googletagmanager.com">
 
-    {% if site.google_analytics.pv.proxy_url and site.google_analytics.pv.enabled %}
-      <link rel="preconnect" href="{{ site.google_analytics.pv.proxy_url }}" crossorigin="use-credentials">
-      <link rel="dns-prefetch" href="{{ site.google_analytics.pv.proxy_url }}">
+    {% if site.google_analytics.pv.proxy_endpoint %}
+      {% assign proxy_url = site.google_analytics.pv.proxy_endpoint
+        | replace: "https://", "" | split: "/" | first | prepend: "https://" %}
+
+      <link rel="preconnect" href="{{ proxy_url }}" crossorigin="use-credentials">
+      <link rel="dns-prefetch" href="{{ proxy_url }}">
     {% endif %}
   {% endif %}
 
   <!-- jsDelivr CDN -->
-  <link rel="preconnect" href="cdn.jsdelivr.net">
-  <link rel="dns-prefetch" href="cdn.jsdelivr.net">
+  <link rel="preconnect" href="https://cdn.jsdelivr.net">
+  <link rel="dns-prefetch" href="https://cdn.jsdelivr.net">
 
   <!-- Bootstrap -->
-  <link rel="stylesheet"
-    href="https://cdn.jsdelivr.net/npm/bootstrap@4.0.0/dist/css/bootstrap.min.css"
-    integrity="sha256-LA89z+k9fjgMKQ/kq4OO2Mrf8VltYml/VES+Rg0fh20=" crossorigin="anonymous">
+  <link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/bootstrap@4.0.0/dist/css/bootstrap.min.css">
 
   <!-- Font Awesome -->
-  <link rel="stylesheet"
-    href="https://cdn.jsdelivr.net/npm/@fortawesome/fontawesome-free@5.11.2/css/all.min.css"
-    integrity="sha256-+N4/V/SbAFiW1MPBCXnfnP9QSN3+Keu+NlB+0ev/YKQ="
-    crossorigin="anonymous">
+  <link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/@fortawesome/fontawesome-free@5.11.2/css/all.min.css">
 
   {% include css-selector.html %}
 
-  <!-- JavaScripts -->
+  <!-- JavaScript -->
 
   <script src="https://cdn.jsdelivr.net/npm/jquery@3/dist/jquery.min.js"></script>
 
-  <script defer
-    src="https://cdn.jsdelivr.net/combine/npm/popper.js@1.15.0,npm/bootstrap@4/dist/js/bootstrap.min.js"></script>
-
-  {% include js-selector.html %}
-
 </head>

_includes/js-selector.html

@@ -2,20 +2,28 @@
   JS selector for site.
 -->
 
-{% if page.layout == 'home' or page.layout == 'post' %}
-  {% if site.google_analytics.pv.enabled %}
+<!-- layout specified -->
+
+{% if page.layout == 'post' %}
+  {% if site.google_analytics.pv.proxy_endpoint or site.google_analytics.pv.cache_path %}
     <!-- pv-report needs countup.js -->
     <script async src="https://cdn.jsdelivr.net/npm/countup.js@1.9.3/dist/countUp.min.js"></script>
-    <script async src="{{ '/assets/js/dist/pvreport.min.js' | relative_url }}"></script>
+    <script defer src="{{ '/assets/js/dist/pvreport.min.js' | relative_url }}"></script>
   {% endif %}
 {% endif %}
 
+{% if page.layout == 'post' or page.layout == 'page' %}
+  <!-- image lazy-loading & popup -->
+  <script src="https://cdn.jsdelivr.net/combine/npm/lozad/dist/lozad.min.js,npm/magnific-popup@1/dist/jquery.magnific-popup.min.js,npm/clipboard@2/dist/clipboard.min.js"></script>
+{% endif %}
+
 {% if page.layout == 'home'
+    or page.layout == 'categories'
     or page.layout == 'post'
-    or page.layout == 'categories' %}
+    or page.layout == 'page' %}
   {% assign type = page.layout %}
 {% else %}
-  {% assign type = "page" %}
+  {% assign type = "commons" %}
 {% endif %}
 
 {% assign js = type | prepend: '/assets/js/dist/' | append: '.min.js' %}
@@ -23,10 +31,31 @@
 
 {% if page.math %}
   <!-- MathJax -->
-  <script defer src="https://polyfill.io/v3/polyfill.min.js?features=es6"></script>
-  <script defer src="https://cdn.jsdelivr.net/npm/mathjax@3/es5/tex-mml-chtml.js"></script>
+  <script>
+  /* see: <https://docs.mathjax.org/en/latest/options/input/tex.html#tex-options> */
+  MathJax = {
+    tex: {
+      inlineMath: [              /* start/end delimiter pairs for in-line math */
+        ['$','$'],
+        ['\\(','\\)']
+      ],
+      displayMath: [             /* start/end delimiter pairs for display math */
+        ['$$', '$$'],
+        ['\\[', '\\]']
+      ]
+    }
+  };
+  </script>
+  <script src="https://polyfill.io/v3/polyfill.min.js?features=es6"></script>
+  <script type="text/javascript" id="MathJax-script" async
+    src="https://cdn.jsdelivr.net/npm/mathjax@3/es5/tex-chtml.js">
+  </script>
 {% endif %}
 
+<!-- commons -->
+
+<script src="https://cdn.jsdelivr.net/combine/npm/popper.js@1.16.1,npm/bootstrap@4/dist/js/bootstrap.min.js"></script>
+
 {% if jekyll.environment == 'production' %}
   <!-- PWA -->
   <script defer src="{{ '/app.js' | relative_url }}"></script>

_includes/lang.html

@@ -0,0 +1,8 @@
+{% comment %}
+Detect appearance language and return it through variable "lang"
+{% endcomment %}
+{% if site.data.locales[site.lang] %}
+  {% assign lang = site.lang %}
+{% else %}
+  {% assign lang = 'en' %}
+{% endif %}

_includes/language-alias.html

@@ -0,0 +1,70 @@
+{% comment %}
+
+  Convert the alias of the syntax language to the official name
+
+  See: <https://github.com/rouge-ruby/rouge/wiki/List-of-supported-languages-and-lexers>
+
+{% endcomment %}
+
+{% assign _lang = include.language | default: '' %}
+
+{% case _lang %}
+  {% when 'actionscript', 'as', 'as3' %}
+    {{ 'ActionScript' }}
+  {% when 'applescript' %}
+    {{ 'AppleScript' }}
+  {% when 'brightscript', 'bs', 'brs' %}
+    {{ 'BrightScript' }}
+  {% when 'cfscript', 'cfc' %}
+    {{ 'CFScript' }}
+  {% when 'coffeescript', 'coffee', 'coffee-script' %}
+    {{ 'CoffeeScript' }}
+  {% when 'cs', 'csharp' %}
+   {{ 'C#' }}
+  {% when 'erl' %}
+    {{ 'Erlang' }}
+  {% when 'graphql' %}
+   {{ 'GraphQL' }}
+  {% when 'haskell', 'hs' %}
+   {{ 'Haskell' }}
+  {% when 'javascript', 'js' %}
+    {{ 'JavaScript' }}
+  {% when 'make', 'mf', 'gnumake', 'bsdmake' %}
+    {{ 'Makefile' }}
+  {% when 'md', 'mkd' %}
+    {{ 'Markdown' }}
+  {% when 'm' %}
+    {{ 'Matlab' }}
+  {% when 'objective_c', 'objc', 'obj-c', 'obj_c', 'objectivec' %}
+    {{ 'Objective-C' }}
+  {% when 'perl', 'pl' %}
+    {{ 'Perl' }}
+  {% when 'php','php3','php4','php5' %}
+    {{ 'PHP' }}
+  {% when 'py' %}
+    {{ 'Python' }}
+  {% when 'rb' %}
+    {{ 'Ruby' }}
+  {% when 'rs','no_run','ignore','should_panic' %}
+    {{ 'Rust' }}
+  {% when 'bash', 'zsh', 'ksh', 'sh' %}
+    {{ 'Shell' }}
+  {% when 'st', 'squeak' %}
+    {{ 'Smalltalk' }}
+  {% when 'tex'%}
+    {{ 'TeX' }}
+  {% when 'latex' %}
+    {{ 'LaTex' }}
+  {% when 'ts', 'typescript' %}
+    {{ 'TypeScript' }}
+  {% when 'vb', 'visualbasic' %}
+    {{ 'Visual Basic' }}
+  {% when 'vue', 'vuejs' %}
+    {{ 'Vue.js' }}
+  {% when 'yml' %}
+    {{ 'YAML' }}
+  {% when 'css', 'html', 'scss', 'ssh', 'toml', 'xml', 'yaml', 'json' %}
+    {{ _lang | upcase }}
+  {% else %}
+    {{ _lang | capitalize }}
+{% endcase %}

_includes/lozad.html

@@ -1,10 +0,0 @@
-<!--
-  image lazy load: https://github.com/ApoorvSaxena/lozad.js
--->
-<script type="text/javascript" src="https://cdn.jsdelivr.net/npm/lozad/dist/lozad.min.js"></script>
-
-<script type="text/javascript">
-  const imgs = document.querySelectorAll('.post-content img');
-  const observer = lozad(imgs);
-  observer.observe();
-</script>

_includes/mermaid.html

@@ -3,8 +3,34 @@
 -->
 
 <script src="https://cdn.jsdelivr.net/npm/mermaid@8/dist/mermaid.min.js"></script>
+
 <script>
   $(function() {
+    function updateMermaid(event) {
+      if (event.source === window && event.data &&
+            event.data.direction === ModeToggle.ID) {
+
+        const mode = event.data.message;
+
+        if (typeof mermaid === "undefined") {
+          return;
+        }
+
+        let expectedTheme = (mode === ModeToggle.DARK_MODE? "dark" : "default");
+        let config = { theme: expectedTheme };
+
+        /* Re-render the SVG › <https://github.com/mermaid-js/mermaid/issues/311#issuecomment-332557344> */
+        $(".mermaid").each(function() {
+          let svgCode = $(this).prev().children().html();
+          $(this).removeAttr("data-processed");
+          $(this).html(svgCode);
+        });
+
+        mermaid.initialize(config);
+        mermaid.init(undefined, ".mermaid");
+      }
+    }
+
     let initTheme = "default";
 
     if ($("html[mode=dark]").length > 0
@@ -25,5 +51,7 @@
     });
 
     mermaid.initialize(mermaidConf);
+
+    window.addEventListener("message", updateMermaid);
   });
 </script>

_includes/mode-toggle.html

@@ -2,14 +2,12 @@
   Switch the mode between dark and light.
 -->
 
-<i class="mode-toggle fas fa-adjust"></i>
-
 <script type="text/javascript">
-
   class ModeToggle {
     static get MODE_KEY() { return "mode"; }
     static get DARK_MODE() { return "dark"; }
     static get LIGHT_MODE() { return "light"; }
+    static get ID() { return "mode-toggle"; }
 
     constructor() {
       if (this.hasMode) {
@@ -24,10 +22,10 @@
         }
       }
 
-      var self = this;
+      let self = this;
 
       /* always follow the system prefers */
-      this.sysDarkPrefers.addListener(function() {
+      this.sysDarkPrefers.addEventListener("change", () => {
         if (self.hasMode) {
           if (self.isDarkMode) {
             if (!self.isSysDarkPrefer) {
@@ -43,11 +41,33 @@
           self.clearMode();
         }
 
-        self.updateMermaid();
+        self.notify();
+
       });
 
     } /* constructor() */
 
+    get sysDarkPrefers() { return window.matchMedia("(prefers-color-scheme: dark)"); }
+
+    get isSysDarkPrefer() { return this.sysDarkPrefers.matches; }
+
+    get isDarkMode() { return this.mode === ModeToggle.DARK_MODE; }
+
+    get isLightMode() { return this.mode === ModeToggle.LIGHT_MODE; }
+
+    get hasMode() { return this.mode != null; }
+
+    get mode() { return sessionStorage.getItem(ModeToggle.MODE_KEY); }
+
+    /* get the current mode on screen */
+    get modeStatus() {
+      if (this.isDarkMode
+        || (!this.hasMode && this.isSysDarkPrefer)) {
+        return ModeToggle.DARK_MODE;
+      } else {
+        return ModeToggle.LIGHT_MODE;
+      }
+    }
 
     setDark() {
       $('html').attr(ModeToggle.MODE_KEY, ModeToggle.DARK_MODE);
@@ -64,82 +84,45 @@
       sessionStorage.removeItem(ModeToggle.MODE_KEY);
     }
 
-    get sysDarkPrefers() { return window.matchMedia("(prefers-color-scheme: dark)"); }
-
-    get isSysDarkPrefer() { return this.sysDarkPrefers.matches; }
-
-    get isDarkMode() { return this.mode == ModeToggle.DARK_MODE; }
-
-    get isLightMode() { return this.mode == ModeToggle.LIGHT_MODE; }
-
-    get hasMode() { return this.mode != null; }
-
-    get mode() { return sessionStorage.getItem(ModeToggle.MODE_KEY); }
-
-    /* get the current mode on screen */
-    get modeStatus() {
-      if (this.isDarkMode
-        || (!this.hasMode && this.isSysDarkPrefer) ) {
-        return ModeToggle.DARK_MODE;
-      } else {
-        return ModeToggle.LIGHT_MODE;
-      }
+    /* Notify another plugins that the theme mode has changed */
+    notify() {
+      window.postMessage({
+        direction: ModeToggle.ID,
+        message: this.modeStatus
+      }, "*");
     }
 
-    updateMermaid() {
-      if (typeof mermaid !== "undefined") {
-        let expectedTheme = (this.modeStatus === ModeToggle.DARK_MODE? "dark" : "default");
-        let config = { theme: expectedTheme };
-
-        /* re-render the SVG › <https://github.com/mermaid-js/mermaid/issues/311#issuecomment-332557344> */
-        $(".mermaid").each(function() {
-          let svgCode = $(this).prev().children().html();
-          $(this).removeAttr("data-processed");
-          $(this).html(svgCode);
-        });
-
-        mermaid.initialize(config);
-        mermaid.init(undefined, ".mermaid");
-      }
-    }
-
-    flipMode() {
-      if (this.hasMode) {
-        if (this.isSysDarkPrefer) {
-          if (this.isLightMode) {
-            this.clearMode();
-          } else {
-            this.setLight();
-          }
-
-        } else {
-          if (this.isDarkMode) {
-            this.clearMode();
-          } else {
-            this.setDark();
-          }
-        }
-
-      } else {
-        if (this.isSysDarkPrefer) {
-          this.setLight();
-        } else {
-          this.setDark();
-        }
-      }
-
-      this.updateMermaid();
-
-    } /* flipMode() */
-
   } /* ModeToggle */
 
-  let toggle = new ModeToggle();
+  const toggle = new ModeToggle();
 
-  $(".mode-toggle").click(function() {
+  function flipMode() {
+    if (toggle.hasMode) {
+      if (toggle.isSysDarkPrefer) {
+        if (toggle.isLightMode) {
+          toggle.clearMode();
+        } else {
+          toggle.setLight();
+        }
 
-    toggle.flipMode();
+      } else {
+        if (toggle.isDarkMode) {
+          toggle.clearMode();
+        } else {
+          toggle.setDark();
+        }
+      }
 
-  });
+    } else {
+      if (toggle.isSysDarkPrefer) {
+        toggle.setLight();
+      } else {
+        toggle.setDark();
+      }
+    }
+
+    toggle.notify();
+
+  } /* flipMode() */
 
 </script>

_includes/no-zero-date.html

@@ -0,0 +1,13 @@
+{% comment %}
+  Remove the zero padding from a month/day string
+{% endcomment %}
+
+{% assign ret = include.date_str %}
+{% assign _first_chat = ret | slice: 0 %}
+
+{% if _first_chat == '0' %}
+  {% assign _last_idx = ret.size | minus: 1 %}
+  {% assign ret = ret | slice: 1, _last_idx %}
+{% endif %}
+
+{{ ret | replace: ' 0', ' ' }}

_includes/panel.html

@@ -1,57 +0,0 @@
-<!--
-  The Pannel on right side (Desktop views)
--->
-
-<div id="panel-wrapper" class="col-xl-3 pl-2 text-muted topbar-down">
-
-  <div class="access">
-
-  {% include update-list.html %}
-
-  {% if update_list.size > 0 %}
-
-    <div id="access-lastmod" class="post">
-      <span>{{- site.data.label.panel.lastmod | default: 'Recent Update' -}}</span>
-      <ul class="post-content pl-0 pb-1 ml-1 mt-2">
-
-      {% for item in update_list %}
-        {% assign index = item | split: "::" | last | plus: 0 %}
-        {% assign post = site.posts[index] %}
-        {% assign url = post.url | relative_url %}
-        <li><a href="{{ url }}">{{ post.title }}</a></li>
-      {% endfor %}
-
-      </ul>
-    </div> <!-- #access-lastmod -->
-
-  {% endif %}
-
-  {% include trending-tags.html %}
-
-  {% if trending_tags.size > 0 %}
-    <div id="access-tags">
-      <span>{{- site.data.label.panel.trending_tags | default: 'Trending Tags' -}}</span>
-      <div class="d-flex flex-wrap mt-3 mb-1 mr-3">
-
-      {% for tag_name in trending_tags %}
-        {% assign url = tag_name | slugify | url_encode | prepend: "/tags/" | append: "/" %}
-        <a class="post-tag" href="{{ url | relative_url }}">{{ tag_name }}</a>
-      {% endfor %}
-
-      </div>
-    </div>
-  {% endif %}
-  </div> <!-- .access -->
-
-  {% if include.toc %}
-    <!-- BS-toc.js will be loaded at medium priority -->
-    <script src="https://cdn.jsdelivr.net/gh/afeld/bootstrap-toc@1.0.1/dist/bootstrap-toc.min.js"></script>
-    <div id="toc-wrapper" class="pl-0 pr-4 mb-5">
-      <span class="pl-3 pt-2 mb-2">
-      {{- site.data.label.panel.toc | default: 'Contents' -}}
-      </span>
-      <nav id="toc" data-toggle="toc"></nav>
-    </div>
-  {% endif %}
-
-</div> <!-- #panel-wrapper -->

_includes/post-nav.html

@@ -5,22 +5,24 @@
 <div class="post-navigation d-flex justify-content-between">
   {% if page.previous.url %}
   <a href="{{ site.baseurl }}{{ page.previous.url }}" class="btn btn-outline-primary"
-    prompt="{{ site.data.label.post.button.previous | default: 'previous' }}">
+    prompt="{{ site.data.locales[lang].post.button.previous }}">
     <p>{{ page.previous.title }}</p>
   </a>
   {% else %}
-  <span class="btn btn-outline-primary disabled">
+  <span class="btn btn-outline-primary disabled"
+    prompt="{{ site.data.locales[lang].post.button.previous }}">
     <p>-</p>
   </span>
   {% endif %}
 
   {% if page.next.url %}
   <a href="{{ site.baseurl }}{{page.next.url}}" class="btn btn-outline-primary"
-    prompt="{{ site.data.label.post.button.next | default: 'next' }}">
+    prompt="{{ site.data.locales[lang].post.button.next }}">
     <p>{{ page.next.title }}</p>
   </a>
   {% else %}
-  <span class="btn btn-outline-primary disabled">
+  <span class="btn btn-outline-primary disabled"
+    prompt="{{ site.data.locales[lang].post.button.next }}">
     <p>-</p>
   </span>
   {% endif %}

_includes/post-paginator.html

@@ -2,13 +2,14 @@
   The paginator for post list on HomgPage.
 -->
 
-<ul class="pagination mt-4 mb-0 pl-lg-2">
+<ul class="pagination align-items-center mt-4 mb-0 pl-lg-2">
   <!-- left arrow -->
   {% if paginator.previous_page %}
     {% assign prev_url = paginator.previous_page_path | relative_url %}
   {% else %}
     {% assign prev_url = "#" %}
   {% endif %}
+
   <li class="page-item {% unless paginator.previous_page %}disabled{% endunless %}">
     <a class="page-link btn-box-shadow" href="{{ prev_url }}" aria-label="previous-page">
       <i class="fas fa-angle-left"></i>
@@ -65,12 +66,19 @@
 
   {% endfor %}
 
+  <!-- mobile pagination -->
+  <li class="page-index align-middle">
+    <span>{{ paginator.page }}</span>
+    <span class="text-muted">/ {{ paginator.total_pages }}</span>
+  </li>
+
   <!-- right arrow -->
   {% if paginator.next_page_path %}
     {% assign next_url = paginator.next_page_path | relative_url %}
   {% else %}
     {% assign next_url = "#" %}
   {% endif %}
+
   <li class="page-item {% unless paginator.next_page_path %}disabled{% endunless %}">
     <a class="page-link btn-box-shadow" href="{{ next_url }}" aria-label="next-page">
       <i class="fas fa-angle-right"></i>

_includes/post-sharing.html

@@ -3,7 +3,7 @@
 -->
 
 <div class="share-wrapper">
-  <span class="share-label text-muted mr-1">{{ site.data.label.post.share | default: 'Share' }}</span>
+  <span class="share-label text-muted mr-1">{{ site.data.locales[lang].post.share }}</span>
   <span class="share-icons">
     {% capture title %}{{ page.title }} - {{ site.title }}{% endcapture %}
     {% assign url = page.url | absolute_url %}
@@ -16,8 +16,11 @@
         </a>
     {% endfor %}
 
-    <i class="fa-fw fas fa-link small" onclick="copyLink()"
-        data-toggle="tooltip" data-placement="top" title="Copy link"></i>
+    <i id="copy-link" class="fa-fw fas fa-link small"
+        data-toggle="tooltip" data-placement="top"
+        title="{{ site.data.locales[lang].post.button.share_link.title }}"
+        title-succeed="{{ site.data.locales[lang].post.button.share_link.succeed }}">
+    </i>
 
   </span>
 </div>

_includes/read-time.html

@@ -1,9 +1,11 @@
 <!--
   Calculate the post's reading time, and display the word count in tooltip
  -->
+
 {% assign words = include.content | strip_html | number_of_words: "auto" %}
 
 <!-- words per minute  -->
+
 {% assign wpm = 180 %}
 {% assign min_time = 1 %}
 
@@ -13,7 +15,16 @@
   {% assign read_time = min_time %}
 {% endunless %}
 
+{% capture read_prompt %}
+  {{- site.data.locales[lang].post.read_time.prompt -}}
+{% endcapture %}
+
 <!-- return element -->
-<span class="readtime" data-toggle="tooltip" data-placement="bottom" title="{{ words }} words">
-  {{- read_time -}}{{" "}}{{- site.data.label.read_time_unit | default: "min" -}}
+<span class="readtime" data-toggle="tooltip" data-placement="bottom"
+  title="{{ words }} {{ site.data.locales[lang].post.words }}">
+  <em>{{- read_time -}}{{" "}}{{- site.data.locales[lang].post.read_time.unit -}}</em>
+  {%- if include.prompt -%}
+    {%- assign _prompt_words = read_prompt | number_of_words: 'auto' -%}
+    {%- unless _prompt_words > 1 -%}{{ " " }}{%- endunless -%}{{ read_prompt }}
+  {%- endif -%}
 </span>

_includes/refactor-content.html

@@ -8,6 +8,7 @@
   In order to allow a wide table to scroll horizontally,
   we suround the markdown table with `<div class="table-wrapper">` and `</div>`
 -->
+
 {% if _content contains '<table>' %}
   {% assign _content = _content
     | replace: '<table>', '<div class="table-wrapper"><table>'
@@ -21,6 +22,7 @@
   https://github.com/penibelst/jekyll-compress-html/issues/101
   https://github.com/penibelst/jekyll-compress-html/issues/71#issuecomment-188144901
 -->
+
 {% if _content contains '<pre class="highlight">' %}
   {% assign _content = _content
     | replace: '<div class="highlight"><pre class="highlight"><code', '<div class="highlight"><code'
@@ -29,38 +31,197 @@
 {% endif %}
 
 <!-- Add attribute 'hide-bullet' to the checkbox list -->
+
 {% if _content contains '<li class="task-list-item"><' %}
   {% assign _content = _content
     | replace: '"task-list-item"><', '"task-list-item" hide-bullet><'
   %}
 {% endif %}
 
-{% if _content contains '<img src="' %}
+<!-- images -->
 
-  {% if site.img_cdn != '' %}
-    {% assign img_path_replacement = '<img src="' | append: site.img_cdn | append: '/' %}
-  {% else %}
-    {% assign img_path_replacement = '<img src="' | append: site.baseurl | append: '/' %}
-  {% endif %}
+{% assign IMG_TAG = '<img ' %}
 
-  {% assign _content = _content | replace: '<img src="/', img_path_replacement %}
+{% if _content contains IMG_TAG %}
+  {% assign _img_content = nil %}
+  {% assign _img_snippets = _content | split: IMG_TAG %}
 
-  <!-- lazy-load images <https://github.com/ApoorvSaxena/lozad.js#usage> -->
-  {% assign lozad = true %}
-  {% assign img_placehodler
-    = 'data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7' %}
+  {% for _img_snippet in _img_snippets %}
+    {% if forloop.first %}
+      {% assign _img_content = _img_snippet %}
+      {% continue %}
+    {% endif %}
 
-  {% assign lozad_replacement = '<img src="'
-    | append: img_placehodler
-    | append: '" data-src="' %}
+    {% assign _width = nil %}
+    {% assign _height = nil %}
+    {% assign _src = nil %}
 
-  {% assign _content = _content | replace: '<img src="', lozad_replacement %}
+    {% assign _left = _img_snippet | split: '/>' | first %}
+    {% assign _right = _img_snippet | replace: _left, '' %}
+
+    {% assign _left = _left | replace: ' w=', ' width=' | replace: ' h=', ' height=' %}
+    {% assign _attrs = _left | split: ' ' %}
+
+    {% for _attr in _attrs %}
+      {% assign _pair = _attr | split: '=' %}
+      {% if _pair.size < 2 %}
+        {% continue %}
+      {% endif %}
+
+      {% capture _key %}{{ _pair | first }}{% endcapture %}
+      {% capture _value %}{{ _pair | last | replace: '"', '' }}{% endcapture %}
+
+      {% case _key %}
+        {% when 'width' %}
+          {% assign _width = _value %}
+        {% when 'height' %}
+          {% assign _height = _value %}
+        {% when 'src' %}
+          {% assign _src = _value %}
+      {% endcase %}
+
+      {% if _width and _height and _src %}
+        {% break %}
+      {% endif %}
+    {% endfor %}
+
+    {% if _src %}
+      {% unless _src contains '://' %}
+
+        <!-- Add CDN URL -->
+        {% if site.img_cdn %}
+          {% assign _src_prefix = site.img_cdn %}
+        {% else %}
+          {% assign _src_prefix = site.baseurl %}
+        {% endif %}
+
+        <!-- Add image path -->
+        {% if page.img_path %}
+          {% assign _path = page.img_path %}
+          {% assign last_char = _path | slice: -1 %}
+
+          {% unless last_char == '/' %}
+            {% assign _path = _path | append: '/' %}
+          {% endunless %}
+
+          {% assign _src_prefix = _src_prefix | append: _path %}
+        {% endif %}
+
+        {% assign _final_src = _src_prefix | append: _src %}
+        {% assign _left = _left | replace: _src, _final_src %}
+
+      {% endunless %}
+
+      <!-- lazy-load images <https://github.com/ApoorvSaxena/lozad.js#usage> -->
+
+      {% assign _left = _left | replace: 'src=', 'data-src=' %}
+
+    {% endif %}
+
+    <!-- Add SVG placehoder to prevent layout reflow -->
+
+    {% if _width and _height %}
+      {%- capture _svg -%}
+        src="data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 {{ _width }} {{ _height }}'%3E%3C/svg%3E"
+      {%- endcapture -%}
+
+      {% assign _left =  _svg | append: ' ' | append: _left %}
+    {% endif %}
+
+    <!-- Bypass the HTML-proofer test -->
+    {% assign _left = _left | append: ' data-proofer-ignore' %}
+
+    {% assign _img_content = _img_content | append: IMG_TAG | append: _left | append: _right %}
+
+  {% endfor %}
+
+  {% assign _content = _img_content %}
 
 {% endif %}
 
+<!-- Add header for code snippets -->
+
+{% if _content contains '<div class="highlight"><code>' %}
+  {% assign _code_spippets = _content | split: '<div class="highlight"><code>' %}
+  {% assign _new_content = '' %}
+
+  {% for _snippet in _code_spippets %}
+
+    {% if forloop.last %}
+      {% assign _new_content = _new_content | append: _snippet %}
+
+    {% else %}
+
+      {% assign _left = _snippet | split: '><' | last%}
+
+      {% if _left contains 'file="' %}
+        {% assign _label_text = _left | split: 'file="' | last | split: '"' | first %}
+        {% assign _label_icon = 'far fa-file-code' %}
+      {% else %}
+        {% assign _lang = _left | split: 'language-' | last | split: ' ' | first %}
+        {% capture _label_text %}{% include language-alias.html language=_lang %}{% endcapture %}
+        {% assign _label_icon = 'fas fa-code small' %}
+      {% endif %}
+
+      {% capture _label %}
+        <span label-text="{{ _label_text | strip }}"><i class="{{ _label_icon }}"></i></span>
+      {% endcapture %}
+
+      {% assign _new_content = _new_content | append: _snippet
+          | append: '<div class="code-header">'
+          | append: _label
+          | append: '<button aria-label="copy" title-succeed="'
+          | append: site.data.locales[lang].post.button.copy_code.succeed
+          | append: '"><i class="far fa-clipboard"></i></button></div>'
+          | append: '<div class="highlight"><code>'
+      %}
+
+    {% endif %}
+
+  {% endfor %}
+
+  {% assign _content = _new_content %}
+
+{% endif %}
+
+<!-- Create heading anchors -->
+
+{% assign heading_levels = '2,3,4,5' | split: ',' %}
+{% assign _heading_content = _content %}
+
+{% for level in heading_levels %}
+  {% capture mark_start %}<h{{ level }} id="{% endcapture %}
+  {% capture mark_end %}</h{{ level }}>{% endcapture %}
+
+  {% if _heading_content contains mark_start %}
+    {% assign _new_content = nil %}
+    {% assign heading_snippets = _heading_content | split: mark_start %}
+
+    {% for snippet in heading_snippets %}
+      {% if forloop.first %}
+        {% assign _new_content = snippet %}
+        {% continue %}
+      {% endif %}
+
+      {% assign id = snippet | split: '"' | first %}
+      {% capture anchor %}<a href="#{{ id }}" class="anchor"><i class="fas fa-hashtag"></i></a>{% endcapture %}
+
+      {% assign left = snippet | split: mark_end | first %}
+      {% assign right = snippet | replace: left, '' %}
+
+      {% assign _new_content = _new_content | append: mark_start
+          | append: left | append: anchor | append: mark_end | append: right
+      %}
+
+    {% endfor %}
+
+    {% assign _heading_content = _new_content %}
+
+  {% endif %}
+{% endfor %}
+
+{% assign _content = _heading_content %}
+
 <!-- return -->
-{{ _content }}
 
-{% if lozad %}
-  {% include lozad.html %}
-{% endif %}
+{{ _content }}

_includes/related-posts.html

@@ -81,7 +81,7 @@
 {% if index_list.size > 0 %}
   <div id="related-posts" class="mt-5 mb-2 mb-sm-4">
     <h3 class="pt-2 mt-1 mb-4 ml-1"
-      data-toc-skip>{{ site.data.label.post.relate_posts | default: 'Further Reading' }}</h3>
+      data-toc-skip>{{ site.data.locales[lang].post.relate_posts }}</h3>
     <div class="card-deck mb-4">
     {% for entry in index_list %}
       {% assign index = entry | plus: 0 %}
@@ -94,7 +94,7 @@
             <div class="text-muted small">
               <p>
                 {% include no-linenos.html content=post.content %}
-                {{ content | markdownify | strip_html | truncate: 200 }}
+                {{ content | markdownify | strip_html | truncate: 200 | escape }}
               </p>
             </div>
           </div>

_includes/search-loader.html

@@ -1,21 +1,22 @@
 <!--
   Jekyll Simple Search loader
+  See: <https://github.com/christian-fei/Simple-Jekyll-Search>
 -->
 
 {% capture result_elem %}
 <div class="pl-1 pr-1 pl-sm-2 pr-sm-2 pl-lg-4 pr-lg-4 pl-xl-0 pr-xl-0">
-  <a href="{{ site.url }}{url}">{title}</a>
+  <a href="{url}">{title}</a>
   <div class="post-meta d-flex flex-column flex-sm-row text-muted mt-1 mb-1">
-    <div class="mr-sm-4"><i class="far fa-folder fa-fw"></i>{categories}</div>
-    <div><i class="fa fa-tag fa-fw"></i>{tags}</div>
+    {categories}
+    {tags}
   </div>
   <p>{snippet}</p>
 </div>
 {% endcapture %}
 
-{% capture not_found %}<p class="mt-5">Oops! No result founds.</p>{% endcapture %}
+{% capture not_found %}<p class="mt-5">{{ site.data.locales[lang].search.no_results }}</p>{% endcapture %}
 
-<script src="https://cdn.jsdelivr.net/npm/simple-jekyll-search@1.7.3/dest/simple-jekyll-search.min.js"></script>
+<script src="https://cdn.jsdelivr.net/npm/simple-jekyll-search@1.10.0/dest/simple-jekyll-search.min.js"></script>
 
 <script>
 SimpleJekyllSearch({
@@ -23,6 +24,23 @@ SimpleJekyllSearch({
   resultsContainer: document.getElementById('search-results'),
   json: '{{ '/assets/js/data/search.json' | relative_url }}',
   searchResultTemplate: '{{ result_elem | strip_newlines }}',
-  noResultsText: '{{ not_found }}'
+  noResultsText: '{{ not_found }}',
+  templateMiddleware: function(prop, value, template) {
+    if (prop === 'categories') {
+      if (value === '') {
+        return `${value}`;
+      } else {
+        return `<div class="mr-sm-4"><i class="far fa-folder fa-fw"></i>${value}</div>`;
+      }
+    }
+
+    if (prop === 'tags') {
+      if (value === '') {
+        return `${value}`;
+      } else {
+        return `<div><i class="fa fa-tag fa-fw"></i>${value}</div>`;
+      }
+    }
+  }
 });
 </script>

_includes/search-results.html

@@ -2,17 +2,9 @@
   The Search results
 -->
 <div id="search-result-wrapper" class="d-flex justify-content-center unloaded">
-  <div class="col-12 col-xl-11 post-content">
+  <div class="col-12 col-sm-11 post-content">
     <div id="search-hints">
-      <h4 class="text-muted mb-4">{{ site.data.label.panel.trending_tags | default: 'Trending Tags' }}</h4>
-
       {% include trending-tags.html %}
-
-      {% for tag in trending_tags %}
-        {% capture url %}/tags/{{ tag | slugify | url_encode }}/{% endcapture %}
-        <a class="post-tag" href="{{ url | relative_url }}">{{ tag | replace: '-', ' ' }}</a>
-      {% endfor %}
-
     </div>
     <div id="search-results" class="d-flex flex-wrap justify-content-center text-muted mt-3"></div>
   </div>

_includes/sidebar.html

@@ -2,38 +2,39 @@
   The Side Bar
 -->
 
-<div id="sidebar" class="d-flex flex-column align-items-end">
-
+<div id="sidebar" class="d-flex flex-column align-items-end" lang="{{lang}}">
   <div class="profile-wrapper text-center">
     <div id="avatar">
       <a href="{{ '/' | relative_url }}" alt="avatar" class="mx-auto">
-        {% capture avatar_url %}
-          {%- if site.avatar contains '://' -%}
-            {{ site.avatar }}
-          {%- elsif site.img_cdn != '' and site.img_cdn -%}
-            {{ site.avatar | prepend: site.img_cdn }}
-          {%- else -%}
-            {{ site.avatar | relative_url }}
-          {%- endif -%}
-        {% endcapture %}
-        <img src="{{ avatar_url }}" alt="avatar" onerror="this.style.display='none'">
+        {% if site.avatar != '' and site.avatar %}
+          {% capture avatar_url %}
+            {%- if site.avatar contains '://' -%}
+              {{ site.avatar }}
+            {%- elsif site.img_cdn != '' and site.img_cdn -%}
+              {{ site.avatar | prepend: site.img_cdn }}
+            {%- else -%}
+              {{ site.avatar | relative_url }}
+            {%- endif -%}
+          {% endcapture %}
+          <img src="{{ avatar_url }}" alt="avatar" onerror="this.style.display='none'">
+        {% endif %}
       </a>
     </div>
 
     <div class="site-title mt-3">
-      <a href="{{ '/' | relative_url }}">{{- site.title -}}</a>
+      <a href="{{ '/' | relative_url }}">{{ site.title }}</a>
     </div>
-
-    <div class="site-subtitle font-italic">{{- site.tagline -}}</div>
+    <div class="site-subtitle font-italic">{{ site.tagline }}</div>
 
   </div><!-- .profile-wrapper -->
 
   <ul class="w-100">
+
     <!-- home -->
     <li class="nav-item{% if page.layout == 'home' %}{{ " active" }}{% endif %}">
       <a href="{{ '/' | relative_url }}" class="nav-link">
         <i class="fa-fw fas fa-home ml-xl-3 mr-xl-3 unloaded"></i>
-        <span>{{ "HOME" }}</span>
+        <span>{{ site.data.locales[lang].tabs.home | upcase }}</span>
       </a>
     </li>
     <!-- the real tabs -->
@@ -41,14 +42,26 @@
     <li class="nav-item{% if tab.url == page.url %}{{ " active" }}{% endif %}">
       <a href="{{ tab.url | relative_url }}" class="nav-link">
         <i class="fa-fw {{ tab.icon }} ml-xl-3 mr-xl-3 unloaded"></i>
-        <span>{{ tab.title | upcase }}</span>
+        {% capture tab_name %}{{ tab.url | split: '/' }}{% endcapture %}
+
+        <span>{{ site.data.locales[lang].tabs.[tab_name] | default: tab.title | upcase }}</span>
       </a>
     </li> <!-- .nav-item -->
     {% endfor %}
 
   </ul> <!-- ul.nav.flex-column -->
 
-  <div class="sidebar-bottom mt-auto d-flex flex-wrap justify-content-center">
+  <div class="sidebar-bottom mt-auto d-flex flex-wrap justify-content-center align-items-center">
+
+    {% unless site.theme_mode %}
+      <button class="mode-toggle btn" aria-label="Switch Mode">
+        <i class="fas fa-adjust"></i>
+      </button>
+
+      {% if site.data.contact.size > 0 %}
+        <span class="icon-border"></span>
+      {% endif %}
+    {% endunless %}
 
     {% for entry in site.data.contact %}
       {% capture url %}
@@ -68,7 +81,6 @@
 
       {% if url %}
       <a href="{{ url }}" aria-label="{{ entry.type }}"
-        {% unless site.theme_mode %}class="order-{{ forloop.index | plus: 2 }}"{% endunless %}
         {% unless entry.noblank %}target="_blank" rel="noopener"{% endunless %}>
         <i class="{{ entry.icon }}"></i>
       </a>
@@ -76,16 +88,6 @@
 
     {% endfor %}
 
-    {% unless site.theme_mode %}
-      {% if site.data.contact.size > 0 %}
-        <span class="icon-border order-2"></span>
-      {% endif %}
-
-      <span id="mode-toggle-wrapper" class="order-1">
-        {% include mode-toggle.html %}
-      </span>
-    {% endunless %}
-
   </div> <!-- .sidebar-bottom -->
 
 </div><!-- #sidebar -->

_includes/timeago.html

@@ -1,27 +1,26 @@
 <!--
   Date format snippet
+  See: ${JS_ROOT}/utils/timeago.js
 -->
 
-{% assign tooltip_df = site.data.date_format.tooltip | default: '%a, %b %e, %Y, %l:%M %p %z' %}
-{% assign post_long_df = site.data.date_format.post.long | default: '%b %e, %Y' %}
-{% assign post_short_df = site.data.date_format.post.short | default: '%b %e' %}
+{% assign tooltip_df = site.data.locales[lang].date_format.tooltip %}
+{% assign post_long_df = site.data.locales[lang].date_format.post.long %}
+{% assign post_short_df = site.data.locales[lang].date_format.post.short %}
 
-<span class="timeago {% if include.class %}{{ include.class }}{% endif %}"
-  {% if include.tooltip %}
-    data-toggle="tooltip"
-    data-placement="bottom"
-    title="{{ include.date | date: tooltip_df }}"
-  {% endif %}>
+<em class="timeago{% if include.class %} {{ include.class }}{% endif %}"
+    date="{{ include.date }}"
+    {% if include.tooltip %}
+      data-toggle="tooltip"
+      data-placement="bottom"
+      title="{{ include.date | date: tooltip_df }}"
+    {% endif %}>
 
-  {% assign this_year = site.time | date: "%Y" %}
-  {% assign post_year = include.date | date: "%Y" %}
+  {%- assign this_year = site.time | date: "%Y" -%}
+  {%- assign post_year = include.date | date: "%Y" -%}
 
-  {% if post_year == this_year %}
+  {%- if post_year == this_year -%}
     {{ include.date | date: post_short_df }}
-  {% else %}
+  {%- else -%}
     {{ include.date | date: post_long_df }}
-  {% endif %}
-
-  <i class="unloaded">{{ include.date | date_to_xmlschema }}</i>
-
-</span>
+  {%- endif -%}
+</em>

_includes/toc.html

@@ -0,0 +1,16 @@
+{% assign enable_toc = false %}
+{% if site.toc and page.toc %}
+  {% if page.content contains '<h2' or page.content contains '<h3' %}
+    {% assign enable_toc = true %}
+  {% endif %}
+{% endif %}
+
+{% if enable_toc %}
+<!-- BS-toc.js will be loaded at medium priority -->
+<script src="https://cdn.jsdelivr.net/gh/afeld/bootstrap-toc@1.0.1/dist/bootstrap-toc.min.js"></script>
+
+<div id="toc-wrapper" class="pl-0 pr-4 mb-5">
+  <div class="panel-heading pl-3 pt-2 mb-2">{{- site.data.locales[lang].panel.toc -}}</div>
+  <nav id="toc" data-toggle="toc"></nav>
+</div>
+{% endif %}

_includes/topbar.html

@@ -5,21 +5,43 @@
 <div id="topbar-wrapper" class="row justify-content-center topbar-down">
   <div id="topbar" class="col-11 d-flex h-100 align-items-center justify-content-between">
     <span id="breadcrumb">
-      {% for item in page.breadcrumb %}
-        {% if item.url %}
-        <span>
-          <a href="{{ site.baseurl }}{{ item.url | remove: '.html'}}">
-            {{ item.label }}
-          </a>
-        </span>
-        {% else %}
-          <span>{{ item.label }}</span>
+
+    {% assign paths = page.url | split: '/' %}
+
+    {% if paths.size == 0 or page.layout == 'home' %}
+      <!-- index page -->
+      <span>{{ site.data.locales[lang].tabs.home | capitalize }}</span>
+
+    {% else %}
+
+      {% for item in paths %}
+
+        {% if forloop.first %}
+          <span>
+            <a href="{{ '/' | relative_url }}">
+              {{ site.data.locales[lang].tabs.home | capitalize }}
+            </a>
+          </span>
+
+        {% elsif forloop.last %}
+
+          {% if page.collection == 'tabs' %}
+            <span>{{ site.data.locales[lang].tabs[item] | default: page.title }}</span>
+          {% else %}
+            <span>{{ page.title }}</span>
+          {% endif %}
+
+        {% elsif page.layout == 'category' or page.layout == 'tag' %}
+          <span>
+            <a href="{{ item | relative_url }}">
+              {{ site.data.locales[lang].tabs[item] | default: page.title }}
+            </a>
+          </span>
         {% endif %}
+
       {% endfor %}
 
-      {% unless page.layout == "home" %}
-        <span>{{ page.title }}</span>
-      {% endunless %}
+    {% endif %}
 
     </span><!-- endof #breadcrumb -->
 
@@ -27,11 +49,12 @@
 
     <div id="topbar-title">
       {% if page.layout == 'home' %}
-        {{- site.title -}}
-      {% elsif page.dynamic_title %}
-        {{- page.title -}}
+        {{- site.data.locales[lang].title | default: site.title -}}
+      {% elsif page.collection == 'tabs' or page.dynamic_title %}
+        {%- capture tab_key -%}{{ page.url | split: '/' }}{%- endcapture -%}
+        {{- site.data.locales[lang].tabs[tab_key] | default: page.title -}}
       {% else %}
-        {{- page.layout | capitalize -}}
+        {{- site.data.locales[lang].layout[page.layout] | default: page.layout | capitalize -}}
       {% endif %}
     </div>
 
@@ -39,10 +62,10 @@
     <span id="search-wrapper" class="align-items-center">
       <i class="fas fa-search fa-fw"></i>
       <input class="form-control" id="search-input" type="search"
-        aria-label="search" placeholder="{{ site.data.label.search_hint | default: 'Search' }}...">
+        aria-label="search" autocomplete="off" placeholder="{{ site.data.locales[lang].search.hint | capitalize }}...">
       <i class="fa fa-times-circle fa-fw" id="search-cleaner"></i>
     </span>
-    <span id="search-cancel" >Cancel</span>
+    <span id="search-cancel" >{{ site.data.locales[lang].search.cancel }}</span>
   </div>
 
 </div>

_includes/trending-tags.html

@@ -34,3 +34,17 @@
     {% endif %}
   {% endfor %}
 {% endfor %}
+
+{% if trending_tags.size > 0 %}
+  <div id="access-tags">
+    <div class="panel-heading">{{- site.data.locales[lang].panel.trending_tags -}}</div>
+    <div class="d-flex flex-wrap mt-3 mb-1 mr-3">
+
+    {% for tag_name in trending_tags %}
+      {% assign url = tag_name | slugify | url_encode | prepend: "/tags/" | append: "/" %}
+      <a class="post-tag" href="{{ url | relative_url }}">{{ tag_name }}</a>
+    {% endfor %}
+
+    </div>
+  </div>
+{% endif %}

_includes/update-list.html

@@ -22,3 +22,19 @@
 {% for entry in all_list limit:MAX_SIZE %}
   {% assign update_list = update_list | push: entry %}
 {% endfor %}
+
+{% if update_list.size > 0 %}
+
+  <div id="access-lastmod" class="post">
+    <div class="panel-heading">{{- site.data.locales[lang].panel.lastmod -}}</div>
+    <ul class="post-content pl-0 pb-1 ml-1 mt-2">
+      {% for item in update_list %}
+        {% assign index = item | split: "::" | last | plus: 0 %}
+        {% assign post = site.posts[index] %}
+        {% assign url = post.url | relative_url %}
+      <li><a href="{{ url }}">{{ post.title }}</a></li>
+      {% endfor %}
+    </ul>
+  </div> <!-- #access-lastmod -->
+
+{% endif %}

_javascript/commons/mode-toggle.js

@@ -0,0 +1,13 @@
+/*
+ * Listener for theme mode toggle
+ */
+$(function() {
+  $(".mode-toggle").click((e) => {
+    const $target = $(e.target);
+    let $btn = ($target.prop("tagName") === "button".toUpperCase() ?
+      $target : $target.parent());
+
+    $btn.blur(); // remove the clicking outline
+    flipMode();
+  });
+});

_javascript/commons/search-display.js

@@ -17,14 +17,12 @@ $(function() {
   const input = $("#search-input");
   const hints = $("#search-hints");
 
-
-  /*--- Actions in small screens (Sidebar unloaded) ---*/
-
   const scrollBlocker = (function () {
     let offset = 0;
     return {
       block() {
-        offset = $(window).scrollTop();
+        offset = window.scrollY;
+        $("html,body").scrollTop(0);
       },
       release() {
         $("html,body").scrollTop(offset);
@@ -35,6 +33,9 @@ $(function() {
     };
   }());
 
+
+  /*--- Actions in small screens (Sidebar unloaded) ---*/
+
   const mobileSearchBar = (function () {
     return {
       on() {
@@ -60,11 +61,11 @@ $(function() {
     return {
       on() {
         if (!visible) {
-          resultWrapper.removeClass("unloaded");
-          main.addClass("hidden");
-
-          visible = true;
+          // the block method must be called before $(#main) unloaded.
           scrollBlocker.block();
+          resultWrapper.removeClass("unloaded");
+          main.addClass("unloaded");
+          visible = true;
         }
       },
       off() {
@@ -75,12 +76,13 @@ $(function() {
           }
           resultWrapper.addClass("unloaded");
           btnClear.removeClass("visible");
-          main.removeClass("hidden");
+          main.removeClass("unloaded");
+
+          // now the release method must be called after $(#main) display
+          scrollBlocker.release();
 
           input.val("");
           visible = false;
-
-          scrollBlocker.release();
         }
       },
       isVisible() {

_javascript/commons/topbar-switch.js

@@ -0,0 +1,69 @@
+/*
+ * Hide Header on scroll down
+ */
+
+$(function() {
+  const $topbarWrapper = $("#topbar-wrapper");
+  const $panel = $("#panel-wrapper");
+  const $searchInput = $("#search-input");
+
+  const CLASS_TOPBAR_UP = "topbar-up";
+  const CLASS_TOPBAR_DOWN = "topbar-down";
+  const ATTR_TOC_SCROLLING_UP = "toc-scrolling-up"; // topbar locked
+
+  let didScroll;
+  let lastScrollTop = 0;
+
+  const delta = $topbarWrapper.outerHeight();
+  const topbarHeight = $topbarWrapper.outerHeight();
+
+  function hasScrolled() {
+    let st = $(this).scrollTop();
+
+    /* Make sure they scroll more than delta */
+    if (Math.abs(lastScrollTop - st) <= delta) {
+      return;
+    }
+
+    if (st > lastScrollTop ) { // Scroll Down
+      if (st > topbarHeight) {
+        $topbarWrapper.removeClass(CLASS_TOPBAR_DOWN).addClass(CLASS_TOPBAR_UP);
+        $panel.removeClass(CLASS_TOPBAR_DOWN);
+
+        if ($searchInput.is(":focus")) {
+          $searchInput.blur(); /* remove focus */
+        }
+      }
+    } else  {// Scroll up
+      // did not reach the bottom of the document, i.e., still have space to scroll up
+      if (st + $(window).height() < $(document).height()) {
+        let tocScrollingUp = $topbarWrapper.attr(ATTR_TOC_SCROLLING_UP);
+        if (typeof tocScrollingUp !== "undefined") {
+          if (tocScrollingUp === "false") {
+            $topbarWrapper.removeAttr(ATTR_TOC_SCROLLING_UP);
+          }
+
+        } else {
+          $topbarWrapper.removeClass(CLASS_TOPBAR_UP).addClass(CLASS_TOPBAR_DOWN);
+          $panel.addClass(CLASS_TOPBAR_DOWN);
+        }
+      }
+    }
+
+    lastScrollTop = st;
+  }
+
+  $(window).scroll(function(event) {
+    if ($("#topbar-title").is(":hidden")) {
+      didScroll = true;
+    }
+  });
+
+  setInterval(function() {
+    if (didScroll) {
+      hasScrolled();
+      didScroll = false;
+    }
+  }, 250);
+
+});

_javascript/copyright

@@ -0,0 +1,5 @@
+/*!
+ * Chirpy v5.0.0 (https://github.com/cotes2020/jekyll-theme-chirpy/)
+ * © 2019 Cotes Chung
+ * MIT Licensed
+ */

_javascript/utils/clipboard.js

@@ -0,0 +1,131 @@
+/*
+ * Clipboard functions
+ *
+ * Dependencies:
+ *   - popper.js (https://github.com/popperjs/popper-core)
+ *   - clipboard.js (https://github.com/zenorocha/clipboard.js)
+ */
+
+$(function() {
+  const btnSelector = '.code-header>button';
+  const ICON_SUCCESS = 'fas fa-check';
+  const ATTR_TIMEOUT = 'timeout';
+  const TIMEOUT = 2000; // in milliseconds
+
+  function isLocked(node) {
+    if ($(node)[0].hasAttribute(ATTR_TIMEOUT)) {
+      let timeout = $(node).attr(ATTR_TIMEOUT);
+      if (Number(timeout) > Date.now()) {
+        return true;
+      }
+    }
+    return false;
+  }
+
+  function lock(node) {
+    $(node).attr(ATTR_TIMEOUT, Date.now() + TIMEOUT);
+  }
+
+  function unlock(node) {
+    $(node).removeAttr(ATTR_TIMEOUT);
+  }
+
+  /* --- Copy code block --- */
+
+  // Initial the clipboard.js object
+  const clipboard = new ClipboardJS(btnSelector, {
+    target(trigger) {
+      let codeBlock = trigger.parentNode.nextElementSibling;
+      return codeBlock.querySelector('code .rouge-code');
+    }
+  });
+
+  $(btnSelector).tooltip({
+    trigger: 'hover',
+    placement: 'left'
+  });
+
+  function getIcon(btn) {
+    let iconNode = $(btn).children();
+    return iconNode.attr('class');
+  }
+
+  const ICON_DEFAULT = getIcon(btnSelector);
+
+  function showTooltip(btn) {
+    const succeedTitle = $(btn).attr('title-succeed');
+    $(btn).attr('data-original-title', succeedTitle).tooltip('show');
+  }
+
+  function hideTooltip(btn) {
+    $(btn).tooltip('hide').removeAttr('data-original-title');
+  }
+
+  function setSuccessIcon(btn) {
+    let btnNode = $(btn);
+    let iconNode = btnNode.children();
+    iconNode.attr('class', ICON_SUCCESS);
+  }
+
+  function resumeIcon(btn) {
+    let btnNode = $(btn);
+    let iconNode = btnNode.children();
+    iconNode.attr('class', ICON_DEFAULT);
+  }
+
+  clipboard.on('success', (e) => {
+    e.clearSelection();
+
+    const trigger = e.trigger;
+    if (isLocked(trigger)) {
+      return;
+    }
+
+    setSuccessIcon(trigger);
+    showTooltip(trigger);
+    lock(trigger);
+
+    setTimeout(() => {
+      hideTooltip(trigger);
+      resumeIcon(trigger);
+      unlock(trigger);
+    }, TIMEOUT);
+
+  });
+
+  /* --- Post link sharing --- */
+
+  $('#copy-link').click((e) => {
+
+    let target = $(e.target);
+
+    if (isLocked(target)) {
+      return;
+    }
+
+    // Copy URL to clipboard
+
+    const url = window.location.href;
+    const $temp = $("<input>");
+
+    $("body").append($temp);
+    $temp.val(url).select();
+    document.execCommand("copy");
+    $temp.remove();
+
+    // Switch tooltip title
+
+    const defaultTitle = target.attr('data-original-title');
+    const succeedTitle = target.attr('title-succeed');
+
+    target.attr('data-original-title', succeedTitle).tooltip('show');
+    lock(target);
+
+    setTimeout(() => {
+      target.attr('data-original-title', defaultTitle);
+      unlock(target);
+    }, TIMEOUT);
+
+  });
+
+});

_javascript/utils/img-extra.js

@@ -0,0 +1,47 @@
+/**
+  Lazy load images (https://github.com/ApoorvSaxena/lozad.js)
+  and popup when clicked (https://github.com/dimsemenov/Magnific-Popup)
+*/
+
+$(function() {
+
+  const IMG_SCOPE = '#main > div.row:first-child > div:first-child';
+
+  if ($(`${IMG_SCOPE} img`).length <= 0 ) {
+    return;
+  }
+
+  /* lazy loading */
+
+  const imgList = document.querySelectorAll(`${IMG_SCOPE} img[data-src]`);
+  const observer = lozad(imgList);
+  observer.observe();
+
+  /* popup */
+
+  $(`${IMG_SCOPE} p > img[data-src],${IMG_SCOPE} img[data-src].preview-img`).each(
+    function() {
+      let nextTag = $(this).next();
+      const title = nextTag.prop('tagName') === 'EM' ? nextTag.text() : '';
+      const src = $(this).attr('data-src'); // created by lozad.js
+
+      $(this).wrap(`<a href="${src}" title="${title}" class="popup"></a>`);
+    }
+  );
+
+  $('.popup').magnificPopup({
+    type: 'image',
+    closeOnContentClick: true,
+    showCloseBtn: false,
+    zoom: {
+      enabled: true,
+      duration: 300,
+      easing: 'ease-in-out'
+    }
+  });
+
+  /* markup the image links */
+
+  $(`${IMG_SCOPE} a`).has('img').addClass('img-link');
+
+});

_javascript/utils/pageviews.js

@@ -0,0 +1,250 @@
+/*
+ * Count page views form GA or local cache file.
+ *
+ * Dependencies:
+ *   - jQuery
+ *   - countUp.js <https://github.com/inorganik/countUp.js>
+ */
+
+const getInitStatus = (function () {
+  let hasInit = false;
+  return () => {
+    let ret = hasInit;
+    if (!hasInit) {
+      hasInit = true;
+    }
+    return ret;
+  };
+}());
+
+const PvOpts = (function () {
+  function getContent(selector) {
+    return $(selector).attr("content");
+  }
+
+  function hasContent(selector) {
+    let content = getContent(selector);
+    return (typeof content !== "undefined" && content !== false);
+  }
+
+  return {
+    getProxyMeta() {
+      return getContent("meta[name=pv-proxy-endpoint]");
+    },
+    getLocalMeta() {
+      return getContent("meta[name=pv-cache-path]");
+    },
+    hasProxyMeta() {
+      return hasContent("meta[name=pv-proxy-endpoint]");
+    },
+    hasLocalMeta() {
+      return hasContent("meta[name=pv-cache-path]");
+    }
+  };
+
+}());
+
+const PvStorage = (function () {
+  const Keys = {
+    KEY_PV: "pv",
+    KEY_PV_SRC: "pv_src",
+    KEY_CREATION: "pv_created_date"
+  };
+
+  const Source = {
+    LOCAL: "same-origin",
+    PROXY: "cors"
+  };
+
+  function get(key) {
+    return localStorage.getItem(key);
+  }
+
+  function set(key, val) {
+    localStorage.setItem(key, val);
+  }
+
+  function saveCache(pv, src) {
+    set(Keys.KEY_PV, pv);
+    set(Keys.KEY_PV_SRC, src);
+    set(Keys.KEY_CREATION, new Date().toJSON());
+  }
+
+  return {
+    keysCount() {
+      return Object.keys(Keys).length;
+    },
+    hasCache() {
+      return (localStorage.getItem(Keys.KEY_PV) !== null);
+    },
+    getCache() {
+      return JSON.parse(localStorage.getItem(Keys.KEY_PV));
+    },
+    saveLocalCache(pv) {
+      saveCache(pv, Source.LOCAL);
+    },
+    saveProxyCache(pv) {
+      saveCache(pv, Source.PROXY);
+    },
+    isExpired() {
+      let date = new Date(get(Keys.KEY_CREATION));
+      date.setHours(date.getHours() + 1);   // per hour
+      return Date.now() >= date.getTime();
+    },
+    isFromLocal() {
+      return get(Keys.KEY_PV_SRC) === Source.LOCAL;
+    },
+    isFromProxy() {
+      return get(Keys.KEY_PV_SRC) === Source.PROXY;
+    },
+    newerThan(pv) {
+      return PvStorage.getCache().totalsForAllResults["ga:pageviews"] > pv.totalsForAllResults["ga:pageviews"];
+    },
+    inspectKeys() {
+      if (localStorage.length !== PvStorage.keysCount()) {
+        localStorage.clear();
+        return;
+      }
+
+      for(let i = 0; i < localStorage.length; i++){
+        const key = localStorage.key(i);
+        switch (key) {
+          case Keys.KEY_PV:
+          case Keys.KEY_PV_SRC:
+          case Keys.KEY_CREATION:
+            break;
+          default:
+            localStorage.clear();
+            return;
+        }
+      }
+    }
+  };
+}()); /* PvStorage */
+
+function countUp(min, max, destId) {
+  if (min < max) {
+    let numAnim = new CountUp(destId, min, max);
+    if (!numAnim.error) {
+      numAnim.start();
+    } else {
+      console.error(numAnim.error);
+    }
+  }
+}
+
+function countPV(path, rows) {
+  let count = 0;
+
+  if (typeof rows !== "undefined" ) {
+    for (let i = 0; i < rows.length; ++i) {
+      const gaPath = rows[parseInt(i, 10)][0];
+      if (gaPath === path) { /* path format see: site.permalink */
+        count += parseInt(rows[parseInt(i, 10)][1], 10);
+        break;
+      }
+    }
+  }
+
+  return count;
+}
+
+function tacklePV(rows, path, elem, hasInit) {
+  let count = countPV(path, rows);
+  count = (count === 0 ? 1 : count);
+
+  if (!hasInit) {
+    elem.text(new Intl.NumberFormat().format(count));
+  } else {
+    const initCount = parseInt(elem.text().replace(/,/g, ""), 10);
+    if (count > initCount) {
+      countUp(initCount, count, elem.attr("id"));
+    }
+  }
+}
+
+function displayPageviews(data) {
+  if (typeof data === "undefined") {
+    return;
+  }
+
+  let hasInit = getInitStatus();
+  const rows = data.rows; /* could be undefined */
+
+  if ($("#post-list").length > 0) { /* the Home page */
+    $(".post-preview").each(function() {
+      const path = $(this).find("a").attr("href");
+      tacklePV(rows, path, $(this).find(".pageviews"), hasInit);
+    });
+
+  } else if ($(".post").length > 0) { /* the post */
+    const path = window.location.pathname;
+    tacklePV(rows, path, $("#pv"), hasInit);
+  }
+}
+
+function fetchProxyPageviews() {
+  if (PvOpts.hasProxyMeta()) {
+    $.ajax({
+      type: "GET",
+      url: PvOpts.getProxyMeta(),
+      dataType: "jsonp",
+      jsonpCallback: "displayPageviews",
+      success: (data) => {
+        PvStorage.saveProxyCache(JSON.stringify(data));
+      },
+      error: (jqXHR, textStatus, errorThrown) => {
+        console.log("Failed to load pageviews from proxy server: " + errorThrown);
+      }
+    });
+  }
+}
+
+function fetchLocalPageviews(hasCache = false) {
+  return fetch(PvOpts.getLocalMeta())
+    .then(response => response.json())
+    .then(data => {
+      if (hasCache) {
+        // The cache from the proxy will sometimes be more recent than the local one
+        if (PvStorage.isFromProxy() && PvStorage.newerThan(data)) {
+          return;
+        }
+      }
+      displayPageviews(data);
+      PvStorage.saveLocalCache(JSON.stringify(data));
+    });
+}
+
+$(function() {
+  if ($(".pageviews").length <= 0) {
+    return;
+  }
+
+  PvStorage.inspectKeys();
+
+  if (PvStorage.hasCache()) {
+    displayPageviews(PvStorage.getCache());
+
+    if (PvStorage.isExpired()) {
+      if (PvOpts.hasLocalMeta()) {
+        fetchLocalPageviews(true).then(fetchProxyPageviews);
+      } else {
+        fetchProxyPageviews();
+      }
+
+    } else {
+      if (PvStorage.isFromLocal()) {
+        fetchProxyPageviews();
+      }
+    }
+
+  } else { // no cached
+
+    if (PvOpts.hasLocalMeta()) {
+      fetchLocalPageviews().then(fetchProxyPageviews);
+    } else {
+      fetchProxyPageviews();
+    }
+  }
+
+});

_javascript/utils/smooth-scroll.js

@@ -0,0 +1,101 @@
+/*
+  Safari doesn't support CSS `scroll-behavior: smooth`,
+  so here is a compatible solution for all browser to smooth scrolling
+
+  See: <https://css-tricks.com/snippets/jquery/smooth-scrolling/>
+
+  Warning: It must be called after all `<a>` tags (e.g., the dynamic TOC) are ready.
+*/
+
+$(function() {
+  const $topbarWrapper = $("#topbar-wrapper");
+  const topbarHeight = $topbarWrapper.outerHeight();
+  const $topbarTitle = $("#topbar-title");
+
+  const ATTR_TOC_SCROLLING = "toc-scrolling-up";
+  const SCROLL_MARK = "scroll-focus";
+  const REM = 16; // in pixels
+  let tocScrollUpCount = 0;
+
+  $("a[href*='#']")
+    .not("[href='#']")
+    .not("[href='#0']")
+    .click(function(event) {
+      if (this.pathname.replace(/^\//, "") === location.pathname.replace(/^\//, "")) {
+        if (location.hostname === this.hostname) {
+          const hash = decodeURI(this.hash);
+          let toFootnoteRef = RegExp(/^#fnref:/).test(hash);
+          let toFootnote = toFootnoteRef? false : RegExp(/^#fn:/).test(hash);
+          let selector = hash.includes(":") ? hash.replace(/\:/g, "\\:") : hash;
+          let $target = $(selector);
+
+          let parent = $(this).parent().prop("tagName");
+          let isAnchor = RegExp(/^H\d/).test(parent);
+          let isMobileViews = !$topbarTitle.is(":hidden");
+
+          if (typeof $target !== "undefined") {
+            event.preventDefault();
+
+            if (history.pushState) { /* add hash to URL */
+              history.pushState(null, null, hash);
+            }
+
+            let curOffset = isAnchor? $(this).offset().top : $(window).scrollTop();
+            let destOffset = $target.offset().top -= REM / 2;
+
+            if (destOffset < curOffset) { // scroll up
+              if (!isAnchor && !toFootnote) { // trigger by ToC item
+                if (!isMobileViews) { // on desktop/tablet screens
+                  $topbarWrapper.removeClass("topbar-down").addClass("topbar-up");
+                  // Send message to `${JS_ROOT}/commons/topbar-switch.js`
+                  $topbarWrapper.attr(ATTR_TOC_SCROLLING, true);
+                  tocScrollUpCount += 1;
+                }
+              }
+
+              if ((isAnchor || toFootnoteRef) && isMobileViews) {
+                destOffset -= topbarHeight;
+              }
+            }
+
+            $("html").animate({
+              scrollTop: destOffset
+            }, 500, () => {
+              $target.focus();
+
+              /* clean up old scroll mark */
+              if ($(`[${SCROLL_MARK}=true]`).length) {
+                $(`[${SCROLL_MARK}=true]`).attr(SCROLL_MARK, false);
+              }
+
+              /* Clean :target links */
+              if ($(":target").length) { /* element that visited by the URL with hash */
+                $(":target").attr(SCROLL_MARK, false);
+              }
+
+              /* set scroll mark to footnotes */
+              if (toFootnote || toFootnoteRef) {
+                $target.attr(SCROLL_MARK, true);
+              }
+
+              if ($target.is(":focus")) { /* Checking if the target was focused */
+                return false;
+              } else {
+                $target.attr("tabindex", "-1"); /* Adding tabindex for elements not focusable */
+                $target.focus(); /* Set focus again */
+              }
+
+              if (typeof $topbarWrapper.attr(ATTR_TOC_SCROLLING) !== "undefined") {
+                tocScrollUpCount -= 1;
+
+                if (tocScrollUpCount <= 0) {
+                  $topbarWrapper.attr(ATTR_TOC_SCROLLING, "false");
+                }
+              }
+            });
+          }
+        }
+      }
+
+    }); /* click() */
+});

_javascript/utils/timeago.js

@@ -0,0 +1,77 @@
+/*
+ * Calculate the Timeago
+ */
+
+$(function() {
+  const timeagoElem = $(".timeago");
+  let tasks = timeagoElem.length;
+  let intervalId = void 0;
+
+  const dPrompt = $("meta[name=day-prompt]").attr("content");
+  const hrPrompt = $("meta[name=hour-prompt]").attr("content");
+  const minPrompt = $("meta[name=minute-prompt]").attr("content");
+  const justnowPrompt = $("meta[name=justnow-prompt]").attr("content");
+
+  function timeago(date, initDate) {
+    let now = new Date();
+    let past = new Date(date);
+
+    if (past.getFullYear() !== now.getFullYear()
+        || past.getMonth() !== now.getMonth()) {
+      return initDate;
+    }
+
+    let seconds = Math.floor((now - past) / 1000);
+
+    let day = Math.floor(seconds / 86400);
+    if (day >= 1) {
+      return ` ${day} ${dPrompt}`;
+    }
+
+    let hour = Math.floor(seconds / 3600);
+    if (hour >= 1) {
+      return ` ${hour} ${hrPrompt}`;
+    }
+
+    let minute = Math.floor(seconds / 60);
+    if (minute >= 1) {
+      return ` ${minute} ${minPrompt}`;
+    }
+
+    return justnowPrompt;
+  }
+
+  function updateTimeago() {
+    $(".timeago").each(function() {
+      if ($(this)[0].hasAttribute("date") === false) {
+        tasks -= 1;
+        return;
+      }
+
+      let date = $(this).attr("date");
+      let initDate = $(this).text();
+      let relativeDate = timeago(date, initDate);
+
+      if (relativeDate === initDate) {
+        $(this).removeAttr("date");
+      } else {
+        $(this).text(relativeDate);
+      }
+
+    });
+
+    if (tasks === 0 && typeof intervalId !== "undefined") {
+      clearInterval(intervalId); /* stop interval */
+    }
+    return tasks;
+  }
+
+  if (tasks === 0) {
+    return;
+  }
+
+  if (updateTimeago() > 0) { /* run immediately */
+    intervalId = setInterval(updateTimeago, 60000); /* run every minute */
+  }
+
+});

_layouts/archives.html

@@ -3,8 +3,10 @@ layout: page
 # The Archives of posts.
 ---
 
+{% include lang.html %}
 
 <div id="archives" class="pl-xl-2">
+
 {% for post in site.posts %}
   {% capture this_year %}{{ post.date | date: "%Y" }}{% endcapture %}
   {% capture pre_year %}{{ post.previous.date | date: "%Y" }}{% endcapture %}
@@ -17,9 +19,10 @@ layout: page
     <li>
       <div>
         {% capture this_day %}{{ post.date | date: "%d" }}{% endcapture %}
-        {% capture this_month %}{{ post.date | date: "%b" }}{% endcapture %}
+        {% capture _mth_df %}{{ site.data.locales[lang].date_format.post.archive_month }}{% endcapture %}
+        {% capture this_month %}{{ post.date | date: _mth_df }}{% endcapture %}
         <span class="date day">{{ this_day }}</span>
-        <span class="date month small text-muted">{{ this_month }}</span>
+        <span class="date month small text-muted">{% include no-zero-date.html date_str=this_month %}</span>
         <a href="{{ post.url | relative_url }}">{{ post.title }}</a>
       </div>
     </li>

_layouts/categories.html

@@ -3,6 +3,7 @@ layout: page
 # All the Categories of posts
 ---
 
+{% include lang.html %}
 
 {% assign HEAD_PREFIX = "h_" %}
 {% assign LIST_PREFIX = "l_" %}
@@ -33,28 +34,23 @@ layout: page
 
   <div class="card categories">
     <!-- top-category -->
-    <div class="card-header d-flex justify-content-between hide-border-bottom"
-        id="{{ HEAD_PREFIX }}{{ group_index }}">
+    <div id="{{ HEAD_PREFIX }}{{ group_index }}"
+      class="card-header d-flex justify-content-between hide-border-bottom">
       <span>
-      {% if sub_categories_size > 0 %}
-        <i class="far fa-folder-open fa-fw"></i>
-      {% else %}
-        <i class="far fa-folder fa-fw"></i>
-      {% endif %}
-        <a href="{{ site.baseurl }}/categories/{{ category_name | slugify | url_encode }}/"
-          class="ml-1 mr-2">
-          {{ category_name }}
-        </a>
+        <i class="far fa-folder{% if sub_categories_size > 0 %}-open{% endif %} fa-fw"></i>
+
+        {% capture _category_url %}/categories/{{ category_name | slugify | url_encode }}/{% endcapture %}
+        <a href="{{ _category_url | relative_url }}" class="ml-1 mr-2">{{ category_name }}</a>
 
         <!-- content count -->
         {% assign top_posts_size = site.categories[category_name] | size %}
         <span class="text-muted small font-weight-light">
           {% if sub_categories_size > 0 %}
             {{ sub_categories_size }}
-            {% if sub_categories_size > 1 %}categories{% else %}category{% endif %},
+            {{ site.data.locales[lang].categories.category_measure }},
           {% endif %}
             {{ top_posts_size }}
-            post{% if top_posts_size > 1 %}s{% endif %}
+            {{ site.data.locales[lang].categories.post_measure }}
         </span>
       </span>
 
@@ -80,11 +76,14 @@ layout: page
         {% for sub_category in sub_categories %}
         <li class="list-group-item">
           <i class="far fa-folder fa-fw"></i>
-          <a href="{{ site.baseurl }}/categories/{{ sub_category | slugify | url_encode }}/"
-            class="ml-1 mr-2">{{ sub_category }}</a>
+
+          {% capture _sub_ctg_url %}/categories/{{ sub_category | slugify | url_encode }}/{% endcapture %}
+          <a href="{{ _sub_ctg_url | relative_url }}" class="ml-1 mr-2">{{ sub_category }}</a>
+
           {% assign posts_size = site.categories[sub_category] | size %}
-          <span class="text-muted small font-weight-light">{{ posts_size }}
-            post{% if posts_size > 1 %}s{% endif %}
+          <span class="text-muted small font-weight-light">
+            {{ posts_size }}
+            {{ site.data.locales[lang].categories.post_measure }}
           </span>
         </li>
         {% endfor %}

_layouts/category.html

@@ -3,6 +3,8 @@ layout: page
 # The Category layout
 ---
 
+{% include lang.html %}
+
 <div id="page-category">
   <h1 class="pl-lg-2">
     <i class="far fa-folder-open fa-fw text-muted"></i>
@@ -11,13 +13,13 @@ layout: page
   </h1>
 
   <ul class="post-content pl-0">
-    {% assign post_long_df = site.data.date_format.post.long | default: '%b %e, %Y' %}
+    {% assign post_df = site.data.locales[lang].date_format.post.long %}
 
     {% for post in page.posts %}
     <li class="d-flex justify-content-between pl-md-3 pr-md-3">
       <a href="{{ post.url | relative_url }}">{{ post.title }}</a>
       <span class="dash flex-grow-1"></span>
-      <span class="text-muted small">{{ post.date | date: post_long_df }}</span>
+      <span class="text-muted small">{{ post.date | date: post_df }}</span>
     </li>
     {% endfor %}
   </ul>

_layouts/default.html

@@ -5,16 +5,22 @@ layout: compress
 
 <!DOCTYPE html>
 
+{% include lang.html %}
+
 {% capture prefer_mode %}
   {% if site.theme_mode %}
     mode="{{ site.theme_mode }}"
   {% endif %}
 {% endcapture %}
 
-<html lang="{{ site.lang | split: "_" | first | default: "en" }}" {{ prefer_mode }}>
+<html lang="{{ site.lang }}"{{ prefer_mode }}>
 
   {% include head.html %}
 
+  {% unless site.theme_mode %}
+    {% include mode-toggle.html %}
+  {% endunless %}
+
   <body data-spy="scroll" data-target="#toc">
 
     {% include sidebar.html %}
@@ -24,7 +30,7 @@ layout: compress
     <div id="main-wrapper">
       <div id="main">
 
-        {% include refactor-content.html content=content %}
+        {{ content }}
 
         {% include footer.html %}
 
@@ -46,6 +52,8 @@ layout: compress
 
     {% include search-loader.html %}
 
+    {% include js-selector.html %}
+
   </body>
 
 </html>

_layouts/home.html

@@ -3,9 +3,11 @@ layout: page
 # The Home page layout
 ---
 
+{% include lang.html %}
+
+{% assign pinned = site.posts | where: "pin", "true" %}
+{% assign default = site.posts | where_exp: "item", "item.pin != true" %}
 
-{% assign pinned = site.posts | where_exp: "item", "item.pin == true"  %}
-{% assign default = site.posts | where_exp: "item", "item.pin != true"  %}
 {% assign posts = "" | split: "" %}
 
 <!-- Get pinned posts -->
@@ -39,7 +41,6 @@ layout: page
   {% endfor %}
 {% endif %}
 
-
 <div id="post-list">
 
 {% for post in posts %}
@@ -52,13 +53,13 @@ layout: page
     <div class="post-content">
       <p>
         {% include no-linenos.html content=post.content %}
-        {{ content | markdownify | strip_html | truncate: 200 }}
+        {{ content | markdownify | strip_html | truncate: 200 | escape }}
       </p>
     </div>
 
-    <div class="post-meta text-muted d-flex justify-content-between">
+    <div class="post-meta text-muted d-flex">
 
-      <div>
+      <div class="mr-auto">
         <!-- posted date -->
         <i class="far fa-calendar fa-fw"></i>
         {% include timeago.html date=post.date tooltip=true %}
@@ -67,19 +68,22 @@ layout: page
         <i class="far fa-clock fa-fw"></i>
         {% include read-time.html content=post.content %}
 
-        <!-- page views -->
-        {% if site.google_analytics.pv.enabled %}
-        <i class="far fa-eye fa-fw"></i>
-        <span id="pv_{{-post.title-}}" class="pageviews">
-          <i class="fas fa-spinner fa-spin fa-fw"></i>
-        </span>
+        <!-- categories -->
+        {% if post.categories.size > 0 %}
+          <i class="far fa-folder-open fa-fw"></i>
+          <span>
+          {% for category in post.categories %}
+            {{ category }}
+            {%- unless forloop.last -%},{%- endunless -%}
+          {% endfor %}
+          </span>
         {% endif %}
       </div>
 
       {% if post.pin %}
       <div class="pin">
         <i class="fas fa-thumbtack fa-fw"></i>
-        <span>{{ site.data.label.pin_prompt | default: 'Pinned' }}</span>
+        <span>{{ site.data.locales[lang].post.pin_prompt }}</span>
       </div>
       {% endif %}
 

_layouts/page.html

@@ -1,34 +1,64 @@
 ---
 layout: default
-# The page layout
 ---
 
+{% include lang.html %}
+
 <div class="row">
-  <div class="col-12 col-lg-11 col-xl-8">
-    <div id="page" class="post pb-5 pl-1 pr-1 pl-sm-2 pr-sm-2 pl-md-4 pr-md-4 mb-md-4">
-    {% if page.dynamic_title %}
-      <h1 class="dynamic-title">{{ page.title }}</h1>
-      <div class="post-content">
+
+  <!-- core -->
+  <div id="core-wrapper" class="col-12 col-lg-11 col-xl-8">
+    <div class="post pl-1 pr-1 pl-sm-2 pr-sm-2 pl-md-4 pr-md-4">
+
+    {% capture _content %}
+      {% if layout.refactor or page.layout == 'page' %}
+        {% include refactor-content.html content=content %}
+      {% else %}
         {{ content }}
+      {% endif %}
+    {% endcapture %}
+
+    {% if page.layout == 'page' or page.collection == 'tabs'%}
+      {% assign title = site.data.locales[lang].tabs[tab_key] | default: page.title %}
+      <h1 class="dynamic-title">
+        {{ title }}
+      </h1>
+      <div class="post-content">
+        {{ _content }}
       </div>
     {% else %}
-      {{ content }}
+      {{ _content }}
     {% endif %}
-    </div> <!-- #page -->
-  </div><!-- .col-12 -->
 
-  {% include panel.html %}
+    </div>
+  </div> <!-- #core-wrapper -->
+
+  <!-- pannel -->
+  <div id="panel-wrapper" class="col-xl-3 pl-2 text-muted topbar-down">
+
+    <div class="access">
+      {% include update-list.html %}
+      {% include trending-tags.html %}
+    </div>
+
+    {% for _include in layout.pannel_includes %}
+      {% assign _include_path = _include | append: '.html' %}
+      {% include {{ _include_path }} %}
+    {% endfor %}
+  </div>
 
 </div>
 
-{% if site.disqus.comments and page.comments %}
+<!-- tail -->
+{% if layout.tail_includes %}
 <div class="row">
   <div class="col-12 col-lg-11 col-xl-8">
-    <div class="pl-1 pr-1 pl-sm-2 pr-sm-2 pl-md-4 pr-md-4">
-
-    {% include disqus.html %}
-
-    </div> <!-- .pl-1 pr-1 -->
-  </div> <!-- .col-12 -->
+    <div id="tail-wrapper" class="pl-1 pr-1 pl-sm-2 pr-sm-2 pl-md-4 pr-md-4">
+      {% for _include in layout.tail_includes %}
+        {% assign _include_path = _include | append: '.html' %}
+        {% include {{ _include_path }} %}
+      {% endfor %}
+    </div>
+  </div>
 </div> <!-- .row -->
 {% endif %}

_layouts/post.html

@@ -1,130 +1,144 @@
 ---
-layout: default
-# The posts' layout
+layout: page
+refactor: true
+pannel_includes:
+  - toc
+tail_includes:
+  - related-posts
+  - post-nav
+  - comments
 ---
 
-<div class="row">
+{% include lang.html %}
 
-  <div id="post-wrapper" class="col-12 col-lg-11 col-xl-8">
+{% if page.image.src %}
+  {% capture bg %}
+    {% unless page.image.no_bg %}{{ 'bg' }}{% endunless %}
+  {% endcapture %}
+  <img src="{{ page.image.src }}" class="preview-img {{ bg | strip }}"
+      alt="{{ page.image.alt | default: "Preview Image" }}"
 
-    <div class="post pl-1 pr-1 pl-sm-2 pr-sm-2 pl-md-4 pr-md-4">
+      {% if page.image.width %}
+        width="{{ page.image.width }}"
+      {% elsif page.image.w %}
+        width="{{ page.image.w }}"
+      {% endif %}
 
-      <h1 data-toc-skip>{{ page.title }}</h1>
+      {% if page.image.height %}
+        height="{{ page.image.height }}"
+      {% elsif page.image.h %}
+        height="{{ page.image.h }}"
+      {% endif %}>
+{% endif %}
 
-      <div class="post-meta text-muted d-flex flex-column">
-        <!-- Published date and author -->
-        <div>
-          {% include timeago.html date=page.date tooltip=true %}
-          by
-          <span class="author">
-            {{ page.author | default: site.author }}
-          </span>
-        </div>
+<h1 data-toc-skip>{{ page.title }}</h1>
 
-        <div>
-          <!-- lastmod -->
-          {% if page.last_modified_at %}
-          <span>
-            Updated
-            {% include timeago.html date=page.last_modified_at class="lastmod" tooltip=true %}
-          </span>
-          {% endif %}
+<div class="post-meta text-muted">
 
-          <!-- read time -->
-          {% include read-time.html content=content %}
+  <!-- author -->
+  <div>
+    {% capture author_name %}{{ page.author.name | default: site.social.name }}{% endcapture %}
+    {% assign author_link = nil %}
 
-          <!-- page views -->
-          {% if site.google_analytics.pv.enabled %}
-          <span id="pv" class="pageviews"><i class="fas fa-spinner fa-spin fa-fw"></i></span>
-          {% endif %}
-
-        </div>
-
-      </div> <!-- .post-meta -->
-
-      <div class="post-content">
-
-        {% if page.image %}
-          <img src="{{ page.image }}" class="preview-img" alt="Preview Image">
-        {% endif %}
-
-        {{ content }}
-
-      </div>
-
-      <div class="post-tail-wrapper text-muted">
-
-        <!-- categories -->
-        {% if page.categories.size > 0 %}
-        <div class="post-meta mb-3">
-          <i class="far fa-folder-open fa-fw mr-1"></i>
-          {% for category in page.categories %}
-            <a href='{{ site.baseurl }}/categories/{{ category | slugify | url_encode }}/'>{{ category }}</a>
-            {%- unless forloop.last -%}, {%- endunless -%}
-          {% endfor %}
-        </div>
-        {% endif %}
-
-        <!-- tags -->
-        {% if page.tags.size > 0 %}
-        <div class="post-tags">
-          <i class="fa fa-tags fa-fw mr-1"></i>
-          {% for tag in page.tags %}
-          <a href="{{ site.baseurl }}/tags/{{ tag | slugify | url_encode }}/"
-            class="post-tag no-text-decoration" >
-            {{- tag -}}
-          </a>
-          {% endfor %}
-          </div>
-        {% endif %}
-
-        <div class="post-tail-bottom
-          d-flex justify-content-between align-items-center mt-3 pt-5 pb-2">
-          {% if site.data.rights.license %}
-          <div class="license-wrapper">
-            This post is licensed under
-            <a href="{{ site.data.rights.license.link }}">{{ site.data.rights.license.name }}</a>
-            by the author.
-          </div>
-          {% endif %}
-
-          {% include post-sharing.html %}
-
-        </div><!-- .post-tail-bottom -->
-
-      </div><!-- div.post-tail -->
-
-    </div> <!-- .post -->
-
-
-  </div> <!-- #post-wrapper -->
-
-  {% assign enable_toc = false %}
-
-  {% if site.toc and page.toc %}
-    {% if content contains '<h2' or content contains '<h3' %}
-      {% assign enable_toc = true %}
+    {% if page.author.link %}
+      {% assign author_link = page.author.link %}
+    {% elsif author_name == site.social.name %}
+      {% assign author_link = site.social.links[0] %}
     {% endif %}
+
+    {{ site.data.locales[lang].post.written_by }}
+    <em>
+      {% if author_link %}
+        <a href="{{ author_link }}">{{ author_name }}</a>
+      {% else %}
+        {{ author_name }}
+      {% endif %}
+    </em>
+  </div>
+
+  <div class="d-flex">
+    <div>
+      <!-- published date -->
+      <span>
+        {{ site.data.locales[lang].post.posted }}
+        {% include timeago.html date=page.date tooltip=true %}
+      </span>
+
+      <!-- lastmod date -->
+      {% if page.last_modified_at %}
+      <span>
+        {{ site.data.locales[lang].post.updated }}
+        {% include timeago.html date=page.last_modified_at tooltip=true %}
+      </span>
+      {% endif %}
+
+      <!-- read time -->
+      {% include read-time.html content=content prompt=true %}
+
+      <!-- page views -->
+      {% if site.google_analytics.pv.proxy_endpoint or site.google_analytics.pv.cache_path %}
+      <span>
+        <em id="pv" class="pageviews">
+          <i class="fas fa-spinner fa-spin fa-fw"></i>
+        </em>
+        {{ site.data.locales[lang].post.pageview_measure }}
+      </span>
+      {% endif %}
+    </div>
+
+  </div> <!-- .d-flex -->
+
+</div> <!-- .post-meta -->
+
+<div class="post-content">
+  {{ content }}
+</div>
+
+<div class="post-tail-wrapper text-muted">
+
+  <!-- categories -->
+  {% if page.categories.size > 0 %}
+  <div class="post-meta mb-3">
+    <i class="far fa-folder-open fa-fw mr-1"></i>
+    {% for category in page.categories %}
+      <a href='{{ site.baseurl }}/categories/{{ category | slugify | url_encode }}/'>{{ category }}</a>
+      {%- unless forloop.last -%}, {%- endunless -%}
+    {% endfor %}
+  </div>
   {% endif %}
 
-  {% include panel.html toc=enable_toc %}
+  <!-- tags -->
+  {% if page.tags.size > 0 %}
+  <div class="post-tags">
+    <i class="fa fa-tags fa-fw mr-1"></i>
+      {% for tag in page.tags %}
+      <a href="{{ site.baseurl }}/tags/{{ tag | slugify | url_encode }}/"
+          class="post-tag no-text-decoration" >
+        {{- tag -}}
+      </a>
+      {% endfor %}
+  </div>
+  {% endif %}
 
-</div> <!-- .row -->
+  <div class="post-tail-bottom
+    d-flex justify-content-between align-items-center mt-3 pt-5 pb-2">
+    <div class="license-wrapper">
 
-<div class="row">
-  <div class="col-12 col-lg-11 col-xl-8">
-    <div id="post-extend-wrapper" class="pl-1 pr-1 pl-sm-2 pr-sm-2 pl-md-4 pr-md-4">
+      {% if site.data.locales[lang].copyright.license.template %}
 
-    {% include related-posts.html %}
+        {% capture _replacement %}
+        <a href="{{ site.data.locales[lang].copyright.license.link }}">
+          {{ site.data.locales[lang].copyright.license.name }}
+        </a>
+        {% endcapture %}
 
-    {% include post-nav.html %}
+        {{ site.data.locales[lang].copyright.license.template | replace: ':LICENSE_NAME', _replacement }}
 
-    {% if site.disqus.comments and page.comments %}
-      {% include disqus.html %}
-    {% endif %}
+      {% endif %}
+    </div>
 
-    </div> <!-- #post-extend-wrapper -->
+    {% include post-sharing.html %}
 
-  </div> <!-- .col-* -->
+  </div><!-- .post-tail-bottom -->
 
-</div> <!-- .row -->
+</div><!-- div.post-tail-wrapper -->

_layouts/tag.html

@@ -3,6 +3,7 @@ layout: page
 # The layout for Tag page
 ---
 
+{% include lang.html %}
 
 <div id="page-tag">
   <h1 class="pl-lg-2">
@@ -11,13 +12,13 @@ layout: page
     <span class="lead text-muted pl-2">{{ page.posts | size }}</span>
   </h1>
   <ul class="post-content pl-0">
-    {% assign post_long_df = site.data.date_format.post.long | default: '%b %e, %Y' %}
+    {% assign post_df = site.data.locales[lang].date_format.post.long %}
 
     {% for post in page.posts %}
     <li class="d-flex justify-content-between pl-md-3 pr-md-3">
       <a href="{{ post.url | relative_url }}">{{ post.title }}</a>
       <span class="dash flex-grow-1"></span>
-      <span class="text-muted small">{{ post.date | date: post_long_df }}</span>
+      <span class="text-muted small">{{ post.date | date: post_df }}</span>
     </li>
     {% endfor %}
   </ul>

_posts/2019-08-08-text-and-typography.md

@@ -1,12 +1,17 @@
 ---
 title: Text and Typography
-author: Cotes Chung
+author:
+  name: Cotes Chung
+  link: https://github.com/cotes2020
 date: 2019-08-08 11:33:00 +0800
 categories: [Blogging, Demo]
 tags: [typography]
 math: true
 mermaid: true
-image: https://cdn.jsdelivr.net/gh/cotes2020/chirpy-images/commons/devices-mockup.png
+image:
+  src: /commons/devices-mockup.png
+  width: 800
+  height: 500
 ---
 
 This post is to show Markdown syntax rendering on [**Chirpy**](https://github.com/cotes2020/jekyll-theme-chirpy/fork), you can also use it as an example of writing. Now, let's start looking at text and typography.
@@ -49,14 +54,13 @@ Fluttering and dancing in the breeze.
 ### Unordered list
 
 - Chapter
-	- Setcion
-      - Paragraph
+  - Section
+    - Paragraph
 
 ### Task list
 
 - [ ] TODO
 - [x] Completed
-- Hold on
 - [ ] Defeat COVID-19
   - [x] Vaccine production
   - [ ] Economic recovery
@@ -70,7 +74,6 @@ Sun
 Moon
 : the natural satellite of the earth, visible by reflected light from the sun
 
-
 ## Block Quote
 
 > This line to shows the Block Quote.
@@ -87,44 +90,42 @@ Moon
 
 <http://127.0.0.1:4000>
 
-
 ## Footnote
 
 Click the hook will locate the footnote[^footnote], and here is another footnote[^fn-nth-2].
 
-
 ## Images
 
 - Default (with caption)
 
-![Desktop View](https://cdn.jsdelivr.net/gh/cotes2020/chirpy-images/posts/20190808/mockup.png)
+![Desktop View](/posts/20190808/mockup.png){: width="972" height="589" }
 _Full screen width and center alignment_
 
 <br>
 
-- Specify width
+- Shadow
 
-![Desktop View](https://cdn.jsdelivr.net/gh/cotes2020/chirpy-images/posts/20190808/mockup.png){: width="400"}
-_400px image width_
+![Window shadow](/posts/20190808/window.png){: .shadow width="1548" height="864" style="max-width: 90%" }
+_shadow effect (visible in light mode)_
 
 <br>
 
 - Left aligned
 
-![Desktop View](https://cdn.jsdelivr.net/gh/cotes2020/chirpy-images/posts/20190808/mockup.png){: width="350" .normal}
+![Desktop View](/posts/20190808/mockup.png){: width="972" height="589" style="max-width: 70%" .normal}
 
 <br>
 
 - Float to left
 
-  ![Desktop View](https://cdn.jsdelivr.net/gh/cotes2020/chirpy-images/posts/20190808/mockup.png){: width="240" .left}
+  ![Desktop View](/posts/20190808/mockup.png){: width="972" height="589" style="max-width: 200px" .left}
   "A repetitive and meaningless text is used to fill the space. A repetitive and meaningless text is used to fill the space. A repetitive and meaningless text is used to fill the space. A repetitive and meaningless text is used to fill the space. A repetitive and meaningless text is used to fill the space. A repetitive and meaningless text is used to fill the space. A repetitive and meaningless text is used to fill the space. A repetitive and meaningless text is used to fill the space. A repetitive and meaningless text is used to fill the space. A repetitive and meaningless text is used to fill the space. A repetitive and meaningless text is used to fill the space. A repetitive and meaningless text is used to fill the space."
 
 <br>
 
 - Float to right
 
-  ![Desktop View](https://cdn.jsdelivr.net/gh/cotes2020/chirpy-images/posts/20190808/mockup.png){: width="240" .right}
+  ![Desktop View](/posts/20190808/mockup.png){: width="972" height="589" style="max-width: 200px" .right}
   "A repetitive and meaningless text is used to fill the space. A repetitive and meaningless text is used to fill the space. A repetitive and meaningless text is used to fill the space. A repetitive and meaningless text is used to fill the space. A repetitive and meaningless text is used to fill the space. A repetitive and meaningless text is used to fill the space. A repetitive and meaningless text is used to fill the space. A repetitive and meaningless text is used to fill the space. A repetitive and meaningless text is used to fill the space. A repetitive and meaningless text is used to fill the space. A repetitive and meaningless text is used to fill the space. A repetitive and meaningless text is used to fill the space."
 
 <br>
@@ -139,23 +140,20 @@ _400px image width_
   cherry :active, c, after b a, 1d
 ```
 
-
 ## Mathematics
 
 The mathematics powered by [**MathJax**](https://www.mathjax.org/):
 
 $$ \sum_{n=1}^\infty 1/n^2 = \frac{\pi^2}{6} $$
 
-When \\(a \ne 0\\), there are two solutions to \\(ax^2 + bx + c = 0\\) and they are
+When $a \ne 0$, there are two solutions to $ax^2 + bx + c = 0$ and they are
 
 $$ x = {-b \pm \sqrt{b^2-4ac} \over 2a} $$
 
-
 ## Inline code
 
 This is an example of `Inline Code`.
 
-
 ## Code block
 
 ### Common
@@ -174,44 +172,23 @@ SHELL=/usr/local/bin/bash
 PYENV_SHELL=bash
 ```
 
-#### Ruby
-
-```ruby
-def sum_eq_n?(arr, n)
-  return true if arr.empty? && n == 0
-  arr.product(arr).reject { |a,b| a == b }.any? { |a,b| a + b == n }
-end
-```
-
 #### Shell
 
-```shell
+```bash
 if [ $? -ne 0 ]; then
     echo "The command was not successful.";
     #do the needful / exit
 fi;
 ```
 
-#### Liquid
+### Specific filename
 
-{% raw %}
-```liquid
-{% if product.title contains 'Pack' %}
-  This product's title contains the word Pack.
-{% endif %}
-```
-{% endraw %}
-
-#### Java
-
-```java
-private void writeObject(java.io.ObjectOutputStream s)
-  throws java.io.IOException {
-  // Write out any hidden serialization magic
-  s.defaultWriteObject();
-  for (E e: map.keySet()) s.writeObject(e);
-}
+```sass
+@import
+  "colors/light-typography",
+  "colors/dark-typography"
 ```
+{: file='_sass/jekyll-theme-chirpy.scss'}
 
 ## Reverse Footnote
 

_posts/2019-08-08-write-a-new-post.md

@@ -1,14 +1,19 @@
 ---
 title: Writing a New Post
-author: Cotes Chung
+author:
+  name: Cotes Chung
+  link: https://github.com/cotes2020
 date: 2019-08-08 14:10:00 +0800
 categories: [Blogging, Tutorial]
 tags: [writing]
+render_with_liquid: false
 ---
 
+This post will guide you how to write a post on _Chirpy_ theme. Even if you have previous experience with Jekyll, this article is worth reading, because many features require specific variables to be set.
+
 ## Naming and Path
 
-Create a new file named `YYYY-MM-DD-TITLE.EXTENSION` and put it in the `_posts/` of the root directory. Please note that the `EXTENSION` must be one of `md` and `markdown`.
+Create a new file named `YYYY-MM-DD-TITLE.EXTENSION` and put it in the `_posts` of the root directory. Please note that the `EXTENSION` must be one of `md` and `markdown`. If you want to save time of creating files, please consider using the plugin [`Jekyll-Compose`](https://github.com/jekyll/jekyll-compose) to accomplish this.
 
 ## Front Matter
 
@@ -23,24 +28,35 @@ tags: [TAG]     # TAG names should always be lowercase
 ---
 ```
 
-> **Note**: The posts' ***layout*** has been set to `post` by default, so there is no need to add the variable ***layout*** in Front Matter block.
+> **Note**: The posts' _layout_ has been set to `post` by default, so there is no need to add the variable _layout_ in the Front Matter block.
 
-### Timezone of date
+### Timezone of Date
 
-In order to accurately record the release date of a post, you should not only setup the `timezone` of `_config.yml` but also provide the the post's timezone in field `date` of its Front Matter block. Format: `+/-TTTT`, e.g. `+0800`.
+In order to accurately record the release date of a post, you should not only set up the `timezone` of `_config.yml` but also provide the post's timezone in variable `date` of its Front Matter block. Format: `+/-TTTT`, e.g. `+0800`.
 
 ### Categories and Tags
 
-The `categories` of each post is designed to contain up to two elements, and the number of elements in `tags` can be zero to infinity. For instance:
+The `categories` of each post are designed to contain up to two elements, and the number of elements in `tags` can be zero to infinity. For instance:
 
 ```yaml
 categories: [Animal, Insect]
 tags: [bee]
 ```
+### Author Information
+
+The author information of the post usually does not need to be filled in the _Front Matter_ , they will be obtained from variables `social.name` and the first entry of `social.links` of the configuration file by default. But you can also override it as follows:
+
+```yaml
+---
+author:
+  name: Full Name
+  link: https://example.com
+---
+```
 
 ## Table of Contents
 
-By default, the **T**able **o**f **C**ontents (TOC) is displayed on the right panel of the post. If you want to turn it off globally, go to `_config.yml` and set the value of variable `toc` to `false`. If you want to turn off TOC for specific post, add the following to post's [Front Matter](https://jekyllrb.com/docs/front-matter/):
+By default, the **T**able **o**f **C**ontents (TOC) is displayed on the right panel of the post. If you want to turn it off globally, go to `_config.yml` and set the value of variable `toc` to `false`. If you want to turn off TOC for a specific post, add the following to the post's [Front Matter](https://jekyllrb.com/docs/front-matter/):
 
 ```yaml
 ---
@@ -50,7 +66,7 @@ toc: false
 
 ## Comments
 
-Similar to TOC, the [Disqus](https://disqus.com/) comments is loaded by default in each post, and the global switch is defined by variable `comments` in file `_config.yml` . If you want to close the comment for specific post, add the following to the **Front Matter** of the post:
+Similar to TOC, the [Disqus](https://disqus.com/) comments are loaded by default in each post, and the global switch is defined by variable `comments` in file `_config.yml` . If you want to close the comment for a specific post, add the following to the **Front Matter** of the post:
 
 ```yaml
 ---
@@ -72,26 +88,35 @@ math: true
 
 [**Mermaid**](https://github.com/mermaid-js/mermaid) is a great diagrams generation tool. To enable it on your post, add the following to the YAML block:
 
-```yml
+```yaml
 ---
 mermaid: true
 ---
 ```
 
-Then you can use it like other markdown language: surround the graph code with ```` ```mermaid ```` and ```` ``` ````.
+Then you can use it like other markdown languages: surround the graph code with ```` ```mermaid ```` and ```` ``` ````.
 
 ## Images
 
 ### Preview image
 
-If you want to add an image to the top of the post contents, specify the url for the image by:
+If you want to add an image to the top of the post contents, specify the attribute `src`, `width`, `height`, and `alt` for the image:
 
 ```yaml
 ---
-image: /path/to/image-file
+image:
+  src: /path/to/image/file
+  width: 1000   # in pixels
+  height: 400   # in pixels
+  alt: image alternative text
 ---
 ```
 
+Except for `alt`, all other options are necessary, especially the `width` and `height`, which are related to user experience and web page loading performance. Later section ["Image size"](#image-size) will also mention this.
+
+Starting from _Chirpy v5.0.0_, the attributes `height` and `width` support abbreviations: `height` → `h`, `width` → `w`.
+
+
 ### Image caption
 
 Add italics to the next line of an image，then it will become the caption and appear at the bottom of the image:
@@ -100,62 +125,111 @@ Add italics to the next line of an image，then it will become the caption and a
 ![img-description](/path/to/image)
 _Image Caption_
 ```
+{: .nolineno}
 
 ### Image size
 
-You can specify the width (and height) of a image with `width`:
+In order to prevent the page content layout from shifting when the image is loaded, we should set the width and height for each image:
 
 ```markdown
-![Desktop View](/assets/img/sample/mockup.png){: width="400"}
+![Desktop View](/assets/img/sample/mockup.png){: width="700" height="400" }
 ```
+{: .nolineno}
+
+Starting from _Chirpy v5.0.0_, `height` and `width` support abbreviations (`height` → `h`, `width` → `w`). The following example has the same effect as the above:
+
+```markdown
+![Desktop View](/assets/img/sample/mockup.png){: w="700" h="400" }
+```
+{: .nolineno}
 
 ### Image position
 
-By default, the image is centered, but you can specify the position by using one of class `normal` , `left` and `right`. For example:
+By default, the image is centered, but you can specify the position by using one of the classes `normal`, `left`, and `right`. For example:
 
 - **Normal position**
 
   Image will be left aligned in below sample:
 
   ```markdown
-  ![Desktop View](/assets/img/sample/mockup.png){: .normal}
+  ![Desktop View](/assets/img/sample/mockup.png){: .normal }
   ```
+  {: .nolineno}
 
 - **Float to the left**
 
   ```markdown
-  ![Desktop View](/assets/img/sample/mockup.png){: .left}
+  ![Desktop View](/assets/img/sample/mockup.png){: .left }
   ```
+  {: .nolineno}
 
 - **Float to the right**
 
   ```markdown
-  ![Desktop View](/assets/img/sample/mockup.png){: .right}
+  ![Desktop View](/assets/img/sample/mockup.png){: .right }
   ```
+  {: .nolineno}
 
-**Limitation**: Once you specify the position of an image, it is forbidden to add the image caption.
+> **Limitation**: Once the position of the image is specified, the image caption should not be added.
+
+### Image shadow
+
+The screenshots of the program window can be considered to show the shadow effect, and the shadow will be visible in the `light` mode:
+
+```markdown
+![Desktop View](/assets/img/sample/mockup.png){: .shadow }
+```
+{: .nolineno}
 
 ### CDN URL
 
-If you host the images on the CDN, you can save the time of repeatedly writing the CDN url by assigning the variable `img_cdn` of `_config.yml` file:
+If you host the images on the CDN, you can save the time of repeatedly writing the CDN URL by assigning the variable `img_cdn` of `_config.yml` file:
 
 ```yaml
 img_cdn: https://cdn.com
 ```
+{: file='_config.yml' .nolineno}
 
-Once `img_cdn` is assigned, the CDN url will be added to the path of all images (images of site avatar and posts) starting with `/`.
+Once `img_cdn` is assigned, the CDN URL will be added to the path of all images (images of site avatar and posts) starting with `/`.
 
 For instance, when using images:
 
 ```markdown
 ![The flower](/path/to/flower.png)
 ```
+{: .nolineno}
 
 The parsing result will automatically add the CDN prefix `https://cdn.com` before the image path:
 
 ```html
 <img src="https://cdn.com/path/to/flower.png" alt="The flower">
 ```
+{: .nolineno}
+
+### Image path
+
+When a post contains many images, it will be a time-consuming task to repeatedly define the path of the images. To solve this, we can define this path in the YAML block of the post:
+
+```yml
+---
+img_path: /img/path/
+---
+```
+{: .nolineno }
+
+And then, the image source of Markdown can write the file name directly:
+
+```md
+![The flower](flower.png)
+```
+{: .nolineno }
+
+The output will be:
+
+```html
+<img src="/img/path/flower.png" alt="The flower">
+```
+{: .nolineno }
 
 ## Pinned Posts
 
@@ -169,31 +243,51 @@ pin: true
 
 ## Code Block
 
-Markdown symbols ```` ``` ```` can easily create a code block as following examples.
+Markdown symbols ```` ``` ```` can easily create a code block as follows:
 
 ```
-This is a common code snippet, without syntax highlight and line number.
+This is a plaintext code snippet.
 ```
 
-## Specific Language
+### Specifying Language
 
-Using ```` ```language ```` you will get code snippets with line numbers and syntax highlight.
-
-> **Note**: The Jekyll style `{% raw %}{%{% endraw %} highlight LANGUAGE {% raw %}%}{% endraw %}` or `{% raw %}{%{% endraw %} highlight LANGUAGE linenos {% raw %}%}{% endraw %}` are not allowed to be used in this theme !
+Using ```` ```{language} ```` you will get a code block with syntax highlight:
 
+````markdown
 ```yaml
-# Yaml code snippet
-items:
-    - part_no:   A4786
-      descrip:   Water Bucket (Filled)
-      price:     1.47
-      quantity:  4
+key: value
 ```
+````
+
+> **Limitation**: The Jekyll style `highlight` tag is not compatible with this theme.
+
+### Line Number
+
+By default, all languages except `plaintext`, `console`, and `terminal` will display line numbers. When you want to hide the line number of the code block, you can append `{: .nolineno}` at the next line:
+
+````markdown
+```shell
+echo 'No more line numbers!'
+```
+{: .nolineno}
+````
+
+### Specifying the Filename
+
+You may have noticed that the code language will be displayed on the left side of the header of the code block. If you want to replace it with the file name, you can add the attribute `file` to achieve this:
+
+````markdown
+```shell
+# content
+```
+{: file="path/to/file" }
+````
 
 ### Liquid Codes
 
-If you want to display the **Liquid** snippet, surround the liquid code with `{% raw %}{%{% endraw %} raw {%raw%}%}{%endraw%}` and `{% raw %}{%{% endraw %} endraw {%raw%}%}{%endraw%}` .
+If you want to display the **Liquid** snippet, surround the liquid code with `{% raw %}` and `{% endraw %}`:
 
+````markdown
 {% raw %}
 ```liquid
 {% if product.title contains 'Pack' %}
@@ -201,8 +295,10 @@ If you want to display the **Liquid** snippet, surround the liquid code with `{%
 {% endif %}
 ```
 {% endraw %}
+````
+
+Or adding `render_with_liquid: false` (Requires Jekyll 4.0 or higher) to the post's YAML block.
 
 ## Learn More
 
 For more knowledge about Jekyll posts, visit the [Jekyll Docs: Posts](https://jekyllrb.com/docs/posts/).
-

_posts/2019-08-09-getting-started.md

@@ -1,6 +1,8 @@
 ---
 title: Getting Started
-author: Cotes Chung
+author:
+  name: Cotes Chung
+  link: https://github.com/cotes2020
 date: 2019-08-09 20:55:00 +0800
 categories: [Blogging, Tutorial]
 tags: [getting started]
@@ -9,57 +11,24 @@ pin: true
 
 ## Prerequisites
 
-Follow the [Jekyll Docs](https://jekyllrb.com/docs/installation/) to complete the installation of `Ruby`, `RubyGems`, `Jekyll` and `Bundler`.
+Follow the instructions in the [Jekyll Docs](https://jekyllrb.com/docs/installation/) to complete the installation of `Ruby`, `RubyGems`, `Jekyll`, and `Bundler`.
 
 ## Installation
 
-There are two ways to get the theme:
+### Creating a New Site
 
-  - Install from [RubyGems](https://rubygems.org/gems/jekyll-theme-chirpy)
-  - Fork from GitHub
+There are two ways to create a new repository for this theme:
 
-### Install From Rubygems
+- [**Using the Chirpy Starter**](#option-1-using-the-chirpy-starter) - Easy to upgrade, isolates irrelevant project files so you can focus on writing.
+- [**Forking on GitHub**](#option-2-forking-on-github) - Convenient for custom development, but difficult to upgrade. Unless you are familiar with Jekyll and are determined to tweak or contribute to this project, this approach is not recommended.
 
-Add this line to your Jekyll site's `Gemfile`:
+#### Option 1. Using the Chirpy Starter
 
-```ruby
-gem "jekyll-theme-chirpy"
-```
+Create a new repository from the [**Chirpy Starter**][use-starter] and name it `<GH_USERNAME>.github.io`, where `GH_USERNAME` represents your GitHub username.
 
-And add this line to your Jekyll site's `_config.yml`:
+#### Option 2. Forking on GitHub
 
-```yaml
-theme: jekyll-theme-chirpy
-```
-
-And then execute:
-
-```console
-$ bundle
-```
-
-Finally, copy the extra files (refer to the [starter project][starter] for the detailed file directory structure) from the theme's gem to your Jekyll site, and append all the variables of the theme's `_config.yml` to your Jekyll site.
-
-> **Hint**: To locate the theme’s gem, execute:
->
-```console
-$ bundle info --path jekyll-theme-chirpy
-```
-
-Or you can [use the starter template][use-starter] to create a Jekyll site to save time copying contents from theme's gem.
-
-[starter]: https://github.com/cotes2020/chirpy-starter
-[use-starter]: https://github.com/cotes2020/chirpy-starter/generate
-
-### Fork From GitHub
-
-[Fork **Chirpy**](https://github.com/cotes2020/jekyll-theme-chirpy/fork) from GitHub and clone your fork to local.
-
-Install gem dependencies by:
-
-```console
-$ bundle
-```
+[Fork **Chirpy**](https://github.com/cotes2020/jekyll-theme-chirpy/fork) on GitHub and rename it to `<GH_USERNAME>.github.io`. Please note that the default branch code is in development.  If you want the site to be stable, please switch to the [latest tag][latest-tag] and start writing.
 
 And then execute:
 
@@ -67,20 +36,28 @@ And then execute:
 $ bash tools/init.sh
 ```
 
-> **Note**: If you don't plan to deploy your site on GitHub Pages, append parameter option `--no-gh` at the end of the above command.
+> **Note**: If you don't want to deploy your site on GitHub Pages, append option `--no-gh` at the end of the above command.
 
-What it does is:
+The above command will:
 
-  1. Remove some files or directories from your repository:
+1. Removes some files or directories from your repository:
+    - `.travis.yml`
+    - files under `_posts`
+    - folder `docs`
 
-      - `.travis.yml`
-      - files under `_posts`
-      - folder `docs`
+2. If the option `--no-gh` is provided, the directory `.github` will be deleted. Otherwise, set up the GitHub Action workflow by removing the extension `.hook` of `.github/workflows/pages-deploy.yml.hook`, and then remove the other files and directories in the folder `.github`.
 
-  2. If you use the `--no-gh` option, the directory `.github` will be deleted. Otherwise, setup the GitHub Action workflow by removing extension `.hook` of `.github/workflows/pages-deploy.yml.hook`, and then remove the other files and directories in folder `.github`.
+3. Removes item `Gemfile.lock` from `.gitignore`.
 
-  3. Automatically create a commit to save the changes.
+4. Creates a new commit to save the changes automatically.
 
+### Installing Dependencies
+
+Before running for the first time, go to the root directory of your site, and install dependencies as follows:
+
+```console
+$ bundle
+```
 
 ## Usage
 
@@ -88,10 +65,16 @@ What it does is:
 
 Update the variables of `_config.yml` as needed. Some of them are typical options:
 
-  - `url`
-  - `avatar`
-  - `timezone`
-  - `theme_mode`
+- `url`
+- `avatar`
+- `timezone`
+- `lang`
+
+### Customing Stylesheet
+
+If you need to customize the stylesheet, copy the theme's `assets/css/style.scss` to the same path on your Jekyll site, and then add the custom style at the end of the style file.
+
+Starting from [`v4.1.0`][chirpy-4.1.0], if you want to overwrite the SASS variables defined in `_sass/addon/variables.scss`, create a new file `_sass/variables-hook.scss` and assign new values to the target variable in it.
 
 ### Running Local Server
 
@@ -103,58 +86,62 @@ $ bundle exec jekyll s
 
 Or run the site on Docker with the following command:
 
-```terminal
+```console
 $ docker run -it --rm \
     --volume="$PWD:/srv/jekyll" \
     -p 4000:4000 jekyll/jekyll \
     jekyll serve
 ```
 
-Open a browser and visit to _<http://localhost:4000>_.
+After a while, the local service will be published at _<http://127.0.0.1:4000>_.
 
 ### Deployment
 
-Before the deployment begins, checkout the file `_config.yml` and make sure the `url` is configured correctly. Furthermore, if you prefer the [**project site**](https://help.github.com/en/github/working-with-github-pages/about-github-pages#types-of-github-pages-sites) and don't use a custom domain, or you want to visit your website with a base url on a web server other than **GitHub Pages**, remember to change the `baseurl` to your project name that starting with a slash, e.g, `/project-name`.
+Before the deployment begins, check out the file `_config.yml` and make sure the `url` is configured correctly. Furthermore, if you prefer the [**project site**](https://help.github.com/en/github/working-with-github-pages/about-github-pages#types-of-github-pages-sites) and don't use a custom domain, or you want to visit your website with a base URL on a web server other than **GitHub Pages**, remember to change the `baseurl` to your project name that starts with a slash, e.g, `/project-name`.
 
 Now you can choose ONE of the following methods to deploy your Jekyll site.
 
-#### Deploy on GitHub Pages
+#### Deploy by Using Github Actions
 
-For security reasons, GitHub Pages build runs on `safe` mode, which restricts us from using plugins to generate additional page files. Therefore, we can use **GitHub Actions** to build the site, store the built site files on a new branch, and use that branch as the source of the GH Pages service.
+For security reasons, GitHub Pages build runs on `safe` mode, which restricts us from using plugins to generate additional page files. Therefore, we can use **GitHub Actions** to build the site, store the built site files on a new branch, and use that branch as the source of the GitHub Pages service.
 
 Quickly check the files needed for GitHub Actions build:
 
-  1. Ensure your Jekyll site has the file `/.github/workflows/pages-deploy.yml`. Otherwise, create a new one and fill in the contents of the [workflow file][workflow], and the value of the `on.push.branches` should be the same as your repo's default branch name.
+- Ensure your Jekyll site has the file `.github/workflows/pages-deploy.yml`. Otherwise, create a new one and fill in the contents of the [sample file][workflow], and the value of the `on.push.branches` should be the same as your repo's default branch name.
 
-  2. Ensuer your Jekyll site has file `/tools/test.sh` and `/tools/deploy.sh`. Otherwise, copy them from this repo to your Jekyll site.
+- Ensure your Jekyll site has file `tools/deploy.sh`. Otherwise, copy it from here to your Jekyll site.
 
-[workflow]:https://github.com/cotes2020/jekyll-theme-chirpy/blob/master/.github/workflows/pages-deploy.yml.hook
+- Furthermore, if you have committed `Gemfile.lock` to the repo, and your runtime system is not Linux, don't forget to update the platform list in the lock file:
 
-Next, rename your repoistory to `<GH-USERNAME>.github.io` on GitHub.
+  ```console
+  $ bundle lock --add-platform x86_64-linux
+  ```
 
-And then publish your Jekyll site by:
+After the above steps, rename your repository to `<GH_USERNAME>.github.io` on GitHub.
 
-  1. Push any commit to remote to trigger the GitHub Actions workflow. Once the build is complete and successful, a new remote branch named `gh-pages` will appear to store the built site files.
+Now publish your Jekyll site by:
 
-  2. Browse to your repo's landing page on GitHub and select the branch `gh-pages` as the [publishing source](https://docs.github.com/en/github/working-with-github-pages/configuring-a-publishing-source-for-your-github-pages-site) throught _Settings_ → _Options_ → _GitHub Pages_:
+1. Push any commit to remote to trigger the GitHub Actions workflow. Once the build is complete and successful, a new remote branch named `gh-pages` will appear to store the built site files.
 
-      ![gh-pages-sources](https://cdn.jsdelivr.net/gh/cotes2020/chirpy-images/posts/20190809/gh-pages-sources.png)
+2. Browse to your repository on GitHub. Select the tab _Settings_, then click _Pages_ in the left navigation bar, and then in the section **Source** of _GitHub Pages_, select the `/(root)` directory of branch `gh-pages` as the [publishing source][pages-src]. Remember to click <kbd>Save</kbd> before leaving.
 
-  3. Visit your website at the address indicated by GitHub.
+    ![gh-pages-sources](/posts/20190809/gh-pages-sources.png){: width="1580" height="250" }
 
-#### Deploy on Other Platforms
+3. Visit your website at the address indicated by GitHub.
 
-On platforms other than GitHub, we cannot enjoy the convenience of **GitHub Actions**. Therefore, we should build the site locally (or on some other 3rd-party CI platform) and then put the site files on the server.
+#### Manually Build and Deploy
 
-Go to the root of the source project, build your site by:
+On self-hosted servers, you cannot enjoy the convenience of **GitHub Actions**. Therefore, you should build the site on your local machine and then upload the site files to the server.
+
+Go to the root of the source project, and build your site as follows:
 
 ```console
 $ JEKYLL_ENV=production bundle exec jekyll b
 ```
 
-Or build the site with Docker by:
+Or build the site on Docker:
 
-```terminal
+```console
 $ docker run -it --rm \
     --env JEKYLL_ENV=production \
     --volume="$PWD:/srv/jekyll" \
@@ -162,4 +149,34 @@ $ docker run -it --rm \
     jekyll build
 ```
 
-Unless you specified the output path, the generated site files will be placed in folder `_site` of the project's root directory. Now you should upload those files to your web server.
+Unless you specified the output path, the generated site files will be placed in folder `_site` of the project's root directory. Now you should upload those files to the target server.
+
+### Upgrading
+
+It depends on how you use the theme:
+
+- If you are using the theme gem (there will be `gem "jekyll-theme-chirpy"` in the `Gemfile`), editing the `Gemfile` and update the version number of the theme gem, for example:
+
+  ```diff
+  - gem "jekyll-theme-chirpy", "~> 3.2", ">= 3.2.1"
+  + gem "jekyll-theme-chirpy", "~> 3.3", ">= 3.3.0"
+  ```
+  {: .nolineno file="Gemfile" }
+
+  And then execute the following command:
+
+  ```console
+  $ bundle update jekyll-theme-chirpy
+  ```
+
+  As the version upgrades, the critical files (for details, see the [Startup Template][starter]) and configuration options will change. Please refer to the [Upgrade Guide](https://github.com/cotes2020/jekyll-theme-chirpy/wiki/Upgrade-Guide) to keep your repo's files in sync with the latest version of the theme.
+
+- If you forked from the source project (there will be `gemspec` in the `Gemfile` of your site), then merge the [latest upstream tags][latest-tag] into your Jekyll site to complete the upgrade.
+The merge is likely to conflict with your local modifications. Please be patient and careful to resolve these conflicts.
+
+[starter]: https://github.com/cotes2020/chirpy-starter
+[use-starter]: https://github.com/cotes2020/chirpy-starter/generate
+[workflow]: https://github.com/cotes2020/jekyll-theme-chirpy/blob/master/.github/workflows/pages-deploy.yml.hook
+[chirpy-4.1.0]: https://github.com/cotes2020/jekyll-theme-chirpy/releases/tag/v4.1.0
+[pages-src]: https://docs.github.com/en/github/working-with-github-pages/configuring-a-publishing-source-for-your-github-pages-site
+[latest-tag]: https://github.com/cotes2020/jekyll-theme-chirpy/tags

_posts/2019-08-11-customize-the-favicon.md

@@ -1,39 +1,37 @@
 ---
 title: Customize the Favicon
-author: Cotes Chung
+author:
+  name: Cotes Chung
+  link: https://github.com/cotes2020
 date: 2019-08-11 00:34:00 +0800
 categories: [Blogging, Tutorial]
 tags: [favicon]
-toc: false
 ---
 
-In [**Chirpy**](https://github.com/cotes2020/jekyll-theme-chirpy/), the image files of [Favicons](https://www.favicon-generator.org/about/) are placed in `assets/img/favicons/`. You may need to replace them with your own. So let's see how to customize these Favicons.
+The [favicons](https://www.favicon-generator.org/about/) of [**Chirpy**](https://github.com/cotes2020/jekyll-theme-chirpy/) are placed in the directory `assets/img/favicons/`. You may want to replace them with your own. The following sections will guide you to create and replace the default favicons.
 
-With a square image (PNG, JPG or GIF) in hand, open the site [*Favicon & App Icon Generator*](https://www.favicon-generator.org/) and upload your original image.
+## Generate the favicon
 
-![upload-image](https://cdn.jsdelivr.net/gh/cotes2020/chirpy-images/posts/20190811/upload-image.png)
+Prepare a square image (PNG, JPG, or SVG) with a size of 512x512 or more, and then go to the online tool [**Real Favicon Generator**](https://realfavicongenerator.net/) and click the button <kbd>Select your Favicon image</kbd> to upload your image file.
 
-Click button <kbd>Create Favicon</kbd> and wait a moment for the website to generate the icons of various sizes automatically.
+In the next step, the webpage will show all usage scenarios. You can keep the default options, scroll to the bottom of the page, and click the button <kbd>Generate your Favicons and HTML code</kbd> to generate the favicon.
 
-![download-icons](https://cdn.jsdelivr.net/gh/cotes2020/chirpy-images/posts/20190811/download-icons.png){: width="600"}
+## Download & Replace
 
 Download the generated package, unzip and delete the following two from the extracted files:
 
-- browserconfig.xml
-- manifest.json
+- `browserconfig.xml`
+- `site.webmanifest`
 
-Now, copy the remaining image files (`.PNG` and `.ICO`) from the extracted `.zip` file to cover the original files in the folder `assets/img/favicons/`.
+And then copy the remaining image files (`PNG` and `ICO`) to cover the original files in the directory `assets/img/favicons/` of your Jekyll site. If your Jekyll site doesn't have this directory yet, just create one.
 
-The following table helps you understand the changes to the icon file:
+The following table will help you understand the changes to the favicon files:
 
-> ✓ means keep, ✗ means delete.
-
-| File(s)             | From Favicon & App Icon Generator | From Chirpy |
+| File(s)             | From Online Tool                  | From Chirpy |
 |---------------------|:---------------------------------:|:-----------:|
 | `*.PNG`             | ✓                                 | ✗           |
 | `*.ICO`             | ✓                                 | ✗           |
-| `browserconfig.xml` | ✗                                 | ✓           |
-| `manifest.json`     | ✗                                 | ✓           |
 
+> Note: ✓ means keep, ✗ means delete.
 
-The next time you build the site, the icon will be replaced with a customized edition.
+The next time you build the site, the favicon will be replaced with a customized edition.

_posts/2021-01-03-enable-google-pv.md

@@ -1,61 +1,61 @@
 ---
 title: Enable Google Page Views
-author: Dinesh Prasanth Moluguwan Krishnamoorthy
+author:
+  name: Dinesh Prasanth Moluguwan Krishnamoorthy
+  link: https://github.com/SilleBille
 date: 2021-01-03 18:32:00 -0500
 categories: [Blogging, Tutorial]
 tags: [google analytics, pageviews]
 ---
 
 
-This post is to enable Page Views on the [**Chirpy**][chirpy-homepage] theme based blog that you just built. This requires technical knowledge and it's recommended to keep the `google_analytics.pv` disabled unless you have a good reason. If your website has low traffic, the page views count would discourage you to write more blogs. With that said, let's start with the setup.
+This post is to enable Page Views on the [**Chirpy**][chirpy-homepage] theme based blog that you just built. This requires technical knowledge and it's recommended to keep the `google_analytics.pv.*` empty unless you have a good reason. If your website has low traffic, the page views count would discourage you to write more blogs. With that said, let's start with the setup.
 
 ## Set up Google Analytics
 
 ### Create GA account and property
 
-First, you need to setup your account on Google analytics. While your create your account, you must create your first **Property** as well.
+First, you need to set up your account on Google analytics. While you create your account, you must create your first **Property** as well.
 
 1. Head to <https://analytics.google.com/> and click on **Start Measuring**
-2. Enter your desired *Account Name* and choose the desired checkboxes
-3. Enter your desired *Property Name*. This is the name of the tracker project that appears on your Google Analytics dashboard
-4. Enter the required information *About your business*
-5. Hit *Create* and accept any license popup to setup your Google Analytics account and create your property
+2. Enter your desired _Account Name_ and choose the desired checkboxes
+3. Enter your desired _Property Name_. This is the name of the tracker project that appears on your Google Analytics dashboard
+4. Enter the required information _About your business_
+5. Hit _Create_ and accept any license popup to set up your Google Analytics account and create your property
 
 ### Create Data Stream
 
-With your property created, you now need to set up Data Stream to track your blog traffic. After you signup, the prompt should automatically take you to creating your first **Data Stream**. If not, follow these steps:
+With your property created, you now need to set up Data Stream to track your blog traffic. After you signup, the prompt should automatically take you to create your first **Data Stream**. If not, follow these steps:
 
 1. Go to **Admin** on the left column
-2. Select the desired property from the drop down on the second column
+2. Select the desired property from the drop-down on the second column
 3. Click on **Data Streams**
 4. Add a stream and click on **Web**
 5. Enter your blog's URL
 
 It should look like this:
 
-![google-analytics-data-stream](https://cdn.jsdelivr.net/gh/cotes2020/chirpy-images/posts/20210103/01-google-analytics-data-stream.png)
+![google-analytics-data-stream](/posts/20210103/01-google-analytics-data-stream.png){: width="1086" height="542"}
 
 Now, click on the new data stream and grab the **Measurement ID**. It should look something like `G-V6XXXXXXXX`. Copy this to your `_config.yml` file
 
 ```yaml
 google_analytics:
-  id: 'G-V6XXXXXXX'          # Fill with your Google Analytics ID
+  id: 'G-V6XXXXXXX'   # fill in your Google Analytics ID
+  # Google Analytics pageviews report settings
   pv:
-    # The Google Analytics pageviews switch.
-    enabled: false
-    # the next options only valid when `google_analytics.pv` is enabled.
-    proxy_url: ''
-    proxy_endpoint: ''
-    cache: false  # pv data local cache, good for the users from GFW area.
+    proxy_endpoint:   # fill in the Google Analytics superProxy endpoint of Google App Engine
+    cache_path:       # the local PV cache data, friendly to visitors from GFW region
 ```
+{: file="_config.yml"}
 
-When you push these changes to your blog, you should start seeing the traffic on your Google Analytics. Play around with Google Analytics dashboard to get familiar with the options available as it takes like 5 mins to pickup your changes. You should now be able to monitor your traffic in realtime.
+When you push these changes to your blog, you should start seeing the traffic on your Google Analytics. Play around with the Google Analytics dashboard to get familiar with the options available as it takes like 5 mins to pick up your changes. You should now be able to monitor your traffic in real time.
 
-![google-analytics-realtime](https://cdn.jsdelivr.net/gh/cotes2020/chirpy-images/posts/20210103/02-google-analytics-realtime.png)
+![google-analytics-realtime](/posts/20210103/02-google-analytics-realtime.png){: width="616" height="557"}
 
 ## Setup Page Views
 
-There is a detailed [tutorial](https://developers.google.com/analytics/solutions/google-analytics-super-proxy) available to set up Google Analytics superProxy. But, if you are interested to just quickly get your Chirpy-based blog display page views, follow along. These steps were tested on a Linux machine. If you are running Windows, you can use Git bash terminal to run Unix-like commands.
+There is a detailed [tutorial](https://developers.google.com/analytics/solutions/google-analytics-super-proxy) available to set up Google Analytics superProxy. But, if you are interested to just quickly get your Chirpy-based blog display page views, follow along. These steps were tested on a Linux machine. If you are running Windows, you can use the Git bash terminal to run Unix-like commands.
 
 ### Setup Google App Engine
 
@@ -69,17 +69,17 @@ There is a detailed [tutorial](https://developers.google.com/analytics/solutions
 
 5. Select **Python** language and **Standard** environment
 
-6. Enable billing account. Yeah, you have to link your credit card. But, you won't be billed unless you exceed your free quota. For a simple blog, free quota is more than sufficient.
+6. Enable billing account. Yeah, you have to link your credit card. But, you won't be billed unless you exceed your free quota. For a simple blog, the free quota is more than sufficient.
 
 7. Go to your App Engine dashboard on your browser and select **API & Services** from the left navigation menu
 
 8. Click on **Enable APIs and Services** button on the top
 
-9. Enable the following APIs: *Google Analytics API*
+9. Enable the following APIs: _Google Analytics API_
 
-10. On the left, Click on *OAuth Consent Screen* and accept **Configure Consent Screen**. Select **External** since your blog is probably hosted for the public. Click on **Publish** under *Publishing Status*
+10. On the left, Click on _OAuth Consent Screen_ and accept **Configure Consent Screen**. Select **External** since your blog is probably hosted for the public. Click on **Publish** under _Publishing Status_
 
-11. Click on **Credentials** on the left and create a new **OAuth Client IDs** credential. Make sure to add a entry under `Authorized redirect URIs` that matches: `https://<project-id>.<region>.r.appspot.com/admin/auth`
+11. Click on **Credentials** on the left and create a new **OAuth Client IDs** credential. Make sure to add an entry under `Authorized redirect URIs` that matches: `https://<project-id>.<region>.r.appspot.com/admin/auth`
 
 12. Note down the **Your Client ID** and **Your Client Secret**. You'll need this in the next section.
 
@@ -115,15 +115,16 @@ There is a detailed [tutorial](https://developers.google.com/analytics/solutions
 
 1. Clone the **Google Analytics superProxy** project on Github: <https://github.com/googleanalytics/google-analytics-super-proxy> to your local.
 
-2. Remove the first 2 lines in the [`src/app.yaml`](https://github.com/googleanalytics/google-analytics-super-proxy/blob/master/src/app.yaml#L1-L2) file:
-	```diff
-- application: your-project-id
-- version: 1
-	```
+2.  Remove the first 2 lines in the [`src/app.yaml`](https://github.com/googleanalytics/google-analytics-super-proxy/blob/master/src/app.yaml#L1-L2) file:
 
-3. In `src/config.py`, add the `OAUTH_CLIENT_ID` and `OAUTH_CLIENT_SECRET` that you gathered from you App Engine Dashboard.
+    ```diff
+    - application: your-project-id
+    - version: 1
+    ```
 
-4. Enter any random key for `XSRF_KEY`, your `config.py` should look similar to this
+3. In `src/config.py`, add the `OAUTH_CLIENT_ID` and `OAUTH_CLIENT_SECRET` that you gathered from your App Engine Dashboard.
+
+4.  Enter any random key for `XSRF_KEY`, your `config.py` should look similar to this
 
     ```python
     #!/usr/bin/python2.7
@@ -143,9 +144,11 @@ There is a detailed [tutorial](https://developers.google.com/analytics/solutions
     # XSRF Settings
     XSRF_KEY = 'OnceUponATimeThereLivedALegend'
     ```
-**Tip:** You can configure a custom domain instead of `https://PROJECT_ID.REGION_ID.r.appspot.com`. But, for the sake of keeping it simple, we will be using the Google provided default URL.
+    {: file="src/config.py"}
 
-5. From inside the src/ directory, deploy the app
+    **Tip:** You can configure a custom domain instead of `https://PROJECT_ID.REGION_ID.r.appspot.com`. But, for the sake of keeping it simple, we will be using the Google provided default URL.
+
+5.  From inside the src/ directory, deploy the app
 
     ```console
     [root@bc96abf71ef8 src]# gcloud app deploy
@@ -185,7 +188,7 @@ There is a detailed [tutorial](https://developers.google.com/analytics/solutions
 
 If everything went good, you'll get this screen:
 
-![superProxy-deployed](https://cdn.jsdelivr.net/gh/cotes2020/chirpy-images/posts/20210103/03-superProxy-deployed.png)
+![superProxy-deployed](/posts/20210103/03-superProxy-deployed.png){: width="1366" height="354"}
 
 ### Create Google Analytics Query
 
@@ -194,47 +197,40 @@ Head to `https://PROJECT_ID.REGION_ID.r.appspot.com/admin` and create a query af
 The query parameters are as follows:
 
 - **start-date**: fill in the first day of blog posting
-
 - **end-date**: fill in `today` (this is a parameter supported by GA Report, which means that it will always end according to the current query date)
-
 - **metrics**: select `ga:pageviews`
-
 - **dimensions**: select `ga:pagePath`
 
 In order to reduce the returned results and reduce the network bandwidth, we add custom filtering rules [^ga-filters]:
 
-- **filters**: fill in `ga:pagePath=~^/posts/.*/$;ga:pagePath!@=`
+- **filters**: fill in `ga:pagePath=~^/posts/.*/$;ga:pagePath!@=`.
 
   Among them, `;` means using _logical AND_ to concatenate two rules.
 
   If the `site.baseurl` is specified, change the first filtering rule to `ga:pagePath=~^/BASE_URL/posts/.*/$`, where `BASE_URL` is the value of `site.baseurl`.
 
-After <kbd>Run Query</kbd>, copy the generated contents of **API Query URI** at the bottom of the page, and fill in the **Encoded URI for the query** of SuperProxy on GAE.
+After <kbd>Run Query</kbd>, copy the generated contents of **API Query URI** at the bottom of the page and fill in the **Encoded URI for the query** of SuperProxy on GAE.
 
 After the query is saved on GAE, a **Public Endpoint** (public access address) will be generated, and we will get the query result in JSON format when accessing it. Finally, click <kbd>Enable Endpoint</kbd> in **Public Request Endpoint** to make the query effective, and click <kbd>Start Scheduling</kbd> in **Scheduling** to start the scheduled task.
 
-![superproxy-query](https://cdn.jsdelivr.net/gh/cotes2020/chirpy-images/posts/20210103/04-superproxy-query.png)
-
+![superproxy-query](/posts/20210103/04-superproxy-query.png){: width="1100" height="126"}
 
 ## Configure Chirpy to Display Page View
 
 Once all the hard part is done, it is very easy to enable the Page View on Chirpy theme. Your superProxy dashboard should look something like below and you can grab the required values.
 
-![superproxy-dashboard](https://cdn.jsdelivr.net/gh/cotes2020/chirpy-images/posts/20210103/05-superproxy-dashboard.png)
+![superproxy-dashboard](/posts/20210103/05-superproxy-dashboard.png){: width="1210" height="694"}
 
 Update the `_config.yml` file of [**Chirpy**][chirpy-homepage] project with the values from your dashboard, to look similar to the following:
 
 ```yaml
 google_analytics:
-  id: 'G-XXXXXXXXXX'   # Fill with your Google Analytics ID
+  id: 'G-V6XXXXXXX'   # fill in your Google Analytics ID
   pv:
-    # The Google Analytics pageviews switch.
-    enabled: true
-    # the next options only valid when `google_analytics.pv` is enabled.
-    proxy_url: 'https://PROJECT_ID.REGION_ID.r.appspot.com'
     proxy_endpoint: 'https://PROJECT_ID.REGION_ID.r.appspot.com/query?id=<ID FROM SUPER PROXY>'
-    cache: false      # pv data local cache, good for the users from GFW area.
+    cache_path:       # the local PV cache data, friendly to visitors from GFW region
 ```
+{: file="_config.yml"}
 
 Now, you should see the Page View enabled on your blog.
 

_sass/addon/module.scss

@@ -1,14 +1,55 @@
 /*
 * Mainly scss modules, only imported to `assets/css/main.scss`
-*
-* v2.1
-* https://github.com/cotes2020/jekyll-theme-chirpy
-* © 2020 Cotes Chung
-* MIT Licensed
 */
 
 /* ---------- scss placeholder --------- */
 
+%heading {
+  color: var(--heading-color);
+  font-weight: 400;
+  font-family: 'Lato', 'Microsoft Yahei', sans-serif;
+}
+
+%section {
+  #core-wrapper & {
+    margin-top: 2.5rem;
+    margin-bottom: 2rem;
+  }
+}
+
+%anchor {
+  .anchor {
+    font-size: 1rem;
+    margin-left: 0.5rem;
+  }
+
+  @media (hover: hover) {
+    .anchor {
+      border-bottom: none !important;
+      visibility: hidden;
+      opacity: 0;
+      transition: opacity 0.25s ease-in, visibility 0s ease-in 0.25s;
+    }
+
+    &:hover {
+      .anchor {
+        visibility: visible;
+        opacity: 1;
+        transition: opacity 0.25s ease-in, visibility 0s ease-in 0s;
+      }
+    }
+  }
+}
+
+%anchor-relative {
+  @extend %anchor;
+
+  .anchor {
+    position: relative;
+    bottom: 1px;
+  }
+}
+
 %tag-hover {
   background: var(--tag-hover);
   transition: background 0.35s ease-in-out;
@@ -34,25 +75,24 @@
   border-bottom: 1px solid var(--link-underline-color);
 }
 
+%clickable-transition {
+  transition: color 0.35s ease-in-out;
+}
+
+%no-cursor {
+  user-select: none;
+}
+
 %no-bottom-border {
   border-bottom: none;
 }
 
-%heading {
-  font-weight: 400;
-  font-family: 'Lato', 'Microsoft Yahei', sans-serif;
+%cursor-pointer {
+  cursor: pointer;
 }
 
-%section {
-  #post-wrapper & {
-    line-height: 1.2;
-    margin-bottom: 1rem;
-  }
-}
-
-%anchor {
-  padding-top: 3.5rem;
-  margin-top: -2.5rem;
+%normal-font-style {
+  font-style: normal;
 }
 
 /* ---------- scss mixin --------- */
@@ -61,19 +101,11 @@
   text-decoration: none;
 }
 
-@mixin sidebar-links($color: rgba(255, 255, 255, 0.5)) {
-  color: $color;
-  transition: color 0.35s ease-in-out;
+%sidebar-links {
+  color: rgba(117, 117, 117, 0.9);
   user-select: none;
 }
 
-@mixin icon-round($diameter) {
-  border: 1px solid;
-  border-radius: 50%;
-  width: $diameter;
-  height: $diameter;
-}
-
 @mixin ml-mr($value) {
   margin-left: $value;
   margin-right: $value;
@@ -88,27 +120,12 @@
   opacity: 0.6;
 }
 
-@mixin semi-bold {
-  font-weight: 600;
-}
-
 @mixin label($font-size: 1rem, $font-weight: 600, $color: var(--label-color)) {
   color: $color;
   font-size: $font-size;
   font-weight: $font-weight;
 }
 
-@mixin panel-label {
-  @include label(inherit);
-  display: block;
-  line-height: 1.2;
-  padding-top: 0.5rem;
-  padding-bottom: 0.5rem;
-  margin-top: 0;
-  margin-bottom: 0;
-  letter-spacing: -0.02em;
-}
-
 @mixin align-center {
   position: relative;
   left: 50%;

_sass/addon/syntax.scss

@@ -1,9 +1,5 @@
 /*
 * The syntax highlight.
-* v2.0
-* https://github.com/cotes2020/jekyll-theme-chirpy
-* © 2018-2019 Cotes Chung
-* MIT Licensed
 */
 
 @import "colors/light-syntax";
@@ -31,24 +27,19 @@ html[mode=dark] {
 
 /* -- Codes Snippet -- */
 
+$code-radius: 6px;
+
 %code-snippet-bg {
   background: var(--highlight-bg-color);
 }
 
 %code-snippet-radius {
-  border-radius: 6px;
+  border-radius: $code-radius;
 }
 
 %code-snippet-padding {
-  padding: 1.5rem;
-}
-
-$code-font-size: 0.85rem;
-
-div > pre {
-  @extend %code-snippet-bg;
-  @extend %code-snippet-radius;
-  @extend %code-snippet-padding;
+  padding-left: 1rem;
+  padding-right: 1.5rem;
 }
 
 .highlighter-rouge {
@@ -69,13 +60,28 @@ div > pre {
   }
 
   overflow: auto;
+  padding-top: 0.5rem;
+  padding-bottom: 1rem;
+
+  pre {
+    margin-bottom: 0;
+    font-size: $code-font-size;
+    line-height: 1.4rem;
+    word-wrap: normal; /* Fixed Safari overflow-x */
+  }
+
+  table {
+    td pre {
+      overflow: visible;  /* Fixed iOS safari overflow-x */
+      word-break: normal; /* Fixed iOS safari linenos code break */
+    }
+  }
+
   .lineno {
-    margin-left: 0.2rem;
     padding-right: 0.5rem;
     min-width: 2.2rem;
     text-align: right;
     color: var(--highlight-lineno-color);
-    border-right: 1px solid var(--highlight-lineno-border-color);
     -webkit-user-select: none;
     -khtml-user-select: none;
     -moz-user-select: none;
@@ -83,24 +89,12 @@ div > pre {
     -o-user-select: none;
     user-select: none;
   }
-  pre {
-    margin-bottom: 0;
-    font-size: $code-font-size;
-    line-height: 1.4rem;
-    word-wrap: normal; /* Fixed Safari overflow-x */
-  }
-  table {
-    padding: 0;
-    border: 0;
-    td pre {
-      overflow: visible;  /* Fixed iOS safari overflow-x */
-      word-break: normal; /* Fixed iOS safari linenos code break */
-    }
-  }
-  td {
-    padding: 0;
-    border: 0;
+
+  /* set the dollar sign to non-selectable */
+  .gp {
+    user-select: none;
   }
+
 } //.highlight
 
 code {
@@ -116,22 +110,26 @@ code {
     background-color: var(--inline-code-bg);
   }
 
-  @at-root a > &.highlighter-rouge {
+  a > &.highlighter-rouge {
     padding-bottom: 0; // show link's underlinke
     color: inherit;
   }
 
-  @at-root a:hover > &.highlighter-rouge {
+  a:hover > &.highlighter-rouge {
     border-bottom: none;
   }
 
   blockquote &.highlighter-rouge {
     color: inherit;
   }
+
+  .highlight > & {
+    color: transparent;
+  }
 }
 
 td.rouge-code {
-  padding: 1.5rem 1.5rem 1.5rem 1rem;
+  @extend %code-snippet-padding;
 
   // Prevent some browser extends from
   // changing the URL string of code block.
@@ -148,29 +146,130 @@ div {
   &[class^='highlighter-rouge'],
   &.language-plaintext.highlighter-rouge,
   &.language-console.highlighter-rouge,
-  &.language-terminal.highlighter-rouge {
+  &.language-terminal.highlighter-rouge,
+  &.nolineno {
     pre.lineno {
       display: none;
     }
+
     td.rouge-code {
-      @extend %code-snippet-padding;
+      padding-left: 1.5rem;
     }
   }
 }
 
-div[class^='language-']::before {
-  content: attr(lang);
-  position: absolute;
-  right: 1.8rem;
-  margin-top: 3px;
-  font-size: 0.7rem;
-  font-weight: 600;
-  color: var(--highlight-lineno-color);
-  text-transform: uppercase;
+.code-header {
+  @extend %no-cursor;
+
+  $code-header-height: 2.25rem;
+
+  border-top-left-radius: $code-radius;
+  border-top-right-radius: $code-radius;
+  display: flex;
+  justify-content: space-between;
+  align-items: center;
+  height: $code-header-height;
+
+  &::before {
+    $dot-size: 0.75rem;
+    $dot-margin: 0.5rem;
+
+    content: "";
+    display: inline-block;
+    margin-left: 1rem;
+    width: $dot-size;
+    height: $dot-size;
+    border-radius: 50%;
+    background-color: var(--code-header-muted-color);
+    box-shadow:
+      ($dot-size + $dot-margin) 0 0 var(--code-header-muted-color),
+      ($dot-size + $dot-margin) * 2 0 0 var(--code-header-muted-color);
+  }
+
+  // the label block
+  span {
+    // label icon
+    i {
+      font-size: 1rem;
+      margin-right: 0.4rem;
+      color: var(--code-header-icon-color);
+
+      &.small {
+        font-size: 70%;
+      }
+    }
+
+    @at-root [file] #{&} > i {
+      position: relative;
+      top: 1px; // center the file icon
+    }
+
+    // label text
+    &::after {
+      content: attr(label-text);
+      font-size: 0.85rem;
+      font-weight: 600;
+      color: var(--code-header-text-color);
+    }
+  }
+
+  // clipboard
+  button {
+    @extend %cursor-pointer;
+
+    border: 1px solid transparent;
+    border-radius: $code-radius;
+    height: $code-header-height;
+    width: $code-header-height;
+    padding: 0;
+    background-color: inherit;
+
+    i {
+      color: var(--code-header-icon-color);
+    }
+
+    &[timeout] {
+      &:hover {
+        border-color: var(--clipboard-checked-color);
+      }
+
+      i {
+        color: var(--clipboard-checked-color);
+      }
+    }
+
+    &:not([timeout]):hover {
+      background-color: rgba(128, 128, 128, 0.37);
+
+      i {
+        color: white;
+      }
+    }
+
+    &:focus {
+      outline: none;
+    }
+
+  }
+
 }
 
-@media (min-width: 768px) {
-  div[class^='language-']::before {
-    right: 3.1rem;
+@media all and (max-width: 576px) {
+  .post-content {
+    > div[class^='language-'] {
+      @include ml-mr(-1.25rem);
+
+      border-radius: 0;
+
+      .highlight {
+        padding-left: 0.25rem;
+      }
+
+      .code-header {
+        border-radius: 0;
+        padding-left: 0.4rem;
+        padding-right: 0.5rem;
+      }
+    }
   }
 }

_sass/addon/variables.scss

@@ -1,27 +1,34 @@
 /*
-* Mainly scss variables
-*
-* v2.1
-* https://github.com/cotes2020/jekyll-theme-chirpy
-* © 2020 Cotes Chung
-* MIT Licensed
-*/
+ * The SCSS variables
+ */
 
-/* --- ↓ width and height ---- */
+/* sidebar */
 
-$tab-height: 3.2rem;
-$tab-cursor-height: 1.6rem;
+$sidebar-width: 260px !default;        // the basic width
+$sidebar-width-small: 210px !default;  // screen width: >= 850px, <= 1199px (iPad landscape)
+$sidebar-width-large: 350px !default;  // screen width: >= 1650px
 
-$sidebar-width-small: 210px;
-$sidebar-width-medium: 260px;
-$sidebar-width-large: 350px;
+/* tabs of sidebar */
 
-$topbar-height: 3rem;
+$tab-count: 5 !default;   // backward compatible (version <= 4.0.2)
+$tab-height: 3rem !default;
+$tab-cursor-height: 1.6rem !default;
 
-$footer-height: 5rem;
+$cursor-width: 2px !default;    // the cursor width of the selected tab
 
-$main-content-max-width: 1150px;
+/* other framework sizes */
 
-$panel-max-width: 300px;
+$topbar-height: 3rem !default;
 
-$post-extend-min-height: 35rem;
+$footer-height: 5rem !default;
+$footer-height-mobile: 6rem !default;   // screen width: <= 576px
+
+$main-content-max-width: 1150px !default;
+
+$panel-max-width: 300px !default;
+
+$bottom-min-height: 35rem !default;
+
+/* syntax highlight */
+
+$code-font-size: 0.85rem !default;

_sass/colors/dark-syntax.scss

@@ -3,20 +3,6 @@
  */
 
 @mixin dark-syntax {
-  /* -----  My styles ------ */
-  --highlight-bg-color: #252525;
-  --highlighter-rouge-color: #de6b18;
-  --highlight-lineno-color: #6c6c6d;
-  --highlight-lineno-border-color: #303435;
-  --inline-code-bg: #272822;
-
-  .highlight {
-    .gp { color: #818c96; }
-  }
-
-  pre { color: #bfbfbf; } /* override Bootstrap */
-  kbd { background-color: black; }
-
   /* syntax highlight colors from https://raw.githubusercontent.com/jwarby/pygments-css/master/monokai.css */
   .highlight pre { background-color: var(--highlight-bg-color); }
   .highlight .hll { background-color: var(--highlight-bg-color); }
@@ -81,4 +67,21 @@
   .highlight .gu { color: #75715e; } /* Generic.Subheading & Diff Unified/Comment? */
   .highlight .gd { color: #f92672; background-color: #561c08; } /* Generic.Deleted & Diff Deleted */
   .highlight .gi { color: #a6e22e; background-color: #0b5858; } /* Generic.Inserted & Diff Inserted */
+
+  /* -----  custom styles ------ */
+
+  --highlight-bg-color: #252525;
+  --highlighter-rouge-color: #de6b18;
+  --highlight-lineno-color: #6c6c6d;
+  --inline-code-bg: #272822;
+  --code-header-text-color: #6a6a6a;
+  --code-header-muted-color: rgb(60 60 60);
+  --code-header-icon-color: rgb(86 86 86);
+  --clipboard-checked-color: #2bcc2b;
+
+  .highlight {
+    .gp { color: #818c96; }
+  }
+
+  pre { color: #bfbfbf; } /* override Bootstrap */
 }

_sass/colors/dark-typography.scss

@@ -3,25 +3,21 @@
  */
 
 @mixin dark-scheme {
-  /* framework */
-  --main-wrapper-bg: rgb(27, 27, 30);
+  /* Framework color */
   --body-bg: var(--main-wrapper-bg);
-  --topbar-wrapper-bg: rgb(39, 40, 43);
-  --search-wrapper-bg: rgb(34, 34, 39);
-  --search-icon-color: rgb(100, 102, 105);
-  --input-focus-border-color: rgb(112, 114, 115);
   --mask-bg: rgb(68, 69, 70);
-  --footer-bg-color: var(--main-wrapper-bg);
+  --main-wrapper-bg: rgb(27, 27, 30);
+  --main-border-color: rgb(44, 45, 45);
 
-  /* common color */
+  /* Common color */
   --text-color: rgb(175, 176, 177);
   --text-muted-color: rgb(107, 116, 124);
-  --link-color: rgb(138, 180, 248);
-  --link-underline-color: rgb(82, 108, 150);
-  --main-border-color: rgb(44, 45, 45);
-  --button-bg: rgb(39, 40, 43);
+  --heading-color: #cccccc;
   --blockquote-border-color: rgb(66, 66, 66);
   --blockquote-text-color: rgb(117, 117, 117);
+  --link-color: rgb(138, 180, 248);
+  --link-underline-color: rgb(82, 108, 150);
+  --button-bg: rgb(39, 40, 43);
   --btn-border-color: rgb(63, 65, 68);
   --btn-backtotop-color: var(--text-color);
   --btn-backtotop-border-color: var(--btn-border-color);
@@ -32,21 +28,26 @@
   --checkbox-checked-color: var(--link-color);
 
   /* Sidebar */
-  --nav-cursor-color: rgb(183, 182, 182);
   --sidebar-bg: radial-gradient(circle, #242424 0%, #1d1f27 100%);
+  --sidebar-muted-color: #6d6c6b;
+  --sidebar-active-color: rgb(255 255 255 / 80%);
+  --nav-cursor-color: rgb(183, 182, 182);
+  --sidebar-btn-bg: rgb(117 116 116 / 20%);
 
-  /* Top Bar */
+  /* Topbar */
   --topbar-text-color: var(--text-color);
+  --topbar-wrapper-bg: rgb(39, 40, 43);
+  --search-wrapper-bg: rgb(34, 34, 39);
+  --search-wrapper-border-color: rgb(34, 34, 39);
+  --search-icon-color: rgb(100, 102, 105);
+  --input-focus-border-color: rgb(112, 114, 115);
 
   /* Home page */
   --post-list-text-color: rgb(175, 176, 177);
   --btn-patinator-text-color: var(--text-color);
   --btn-paginator-hover-color: rgb(64, 65, 66);
-  --btn-active-bg: rgba(28, 52, 94, 1);
-  --btn-active-border-color: rgb(66, 94, 138);
-  --btn-text-color: var(--text-color);
   --btn-paginator-border-color: var(--btn-border-color);
-  --btn-paginator-shadow: var(--main-wrapper-bg);
+  --btn-text-color: var(--text-color);
   --pin-bg: rgb(34 35 37);
   --pin-color: inherit;
 
@@ -64,6 +65,10 @@
   --card-bg: rgb(39, 40, 43);
   --card-border-color: rgb(53, 53, 60);
   --card-box-shadow: var(--main-wrapper-bg);
+  --preview-img-bg: radial-gradient(circle, rgb(22 22 24) 0%, rgb(32 32 32) 100%);
+  --kbd-wrap-color: #6a6a6a;
+  --kbd-text-color: #d3d3d3;
+  --kbd-bg-color: #242424;
 
   /* tags */
   --tag-border: rgb(59, 79, 88);
@@ -74,17 +79,15 @@
   /* categories */
   --categories-border: rgb(64, 66, 69);
   --categories-hover-bg: rgb(73, 75, 76);
+  --categories-icon-hover-color: white;
 
   /* archives */
   --timeline-node-bg: rgb(150, 152, 156);
   --timeline-color: rgb(63, 65, 68);
   --timeline-year-dot-color: var(--timeline-color);
 
-  /* Footer */
-  --footer-link: rgb(171, 171, 171);
-
-  .post-content img {
-    filter: brightness(90%);
+  .post img[data-src] {
+    filter: brightness(95%);
   }
 
   hr {
@@ -111,11 +114,13 @@
     .card-header {
       background-color: var(--card-header-bg);
     }
+
     .list-group-item {
       border-left: none;
       border-right: none;
       padding-left: 2rem;
       border-color: var(--categories-border);
+
       &:last-child {
         border-bottom-color: var(--card-bg);
       }
@@ -123,13 +128,21 @@
   }
 
   #archives li:nth-child(odd) {
-    background-image: linear-gradient(
-      to left,
-      rgb(26, 26, 30),
-      rgb(39, 39, 45),
-      rgb(39, 39, 45),
-      rgb(39, 39, 45),
-      rgb(26, 26, 30));
+    background-image:
+      linear-gradient(
+        to left,
+        rgb(26, 26, 30),
+        rgb(39, 39, 45),
+        rgb(39, 39, 45),
+        rgb(39, 39, 45),
+        rgb(26, 26, 30)
+      );
+  }
+
+  color-scheme: dark;
+
+  #disqus_thread {
+    color-scheme: none;
   }
 
 } // dark-scheme

_sass/colors/light-syntax.scss

@@ -68,8 +68,12 @@
 
   /* --- custom light colors --- */
   --highlight-bg-color: #f7f7f7;
-  --highlighter-rouge-color: #353a3d;
+  --highlighter-rouge-color: #2f2f2f;
   --highlight-lineno-color: #c2c6cc;
-  --highlight-lineno-border-color: #e9ecef;
   --inline-code-bg: #f3f3f3;
+  --code-header-text-color: #a3a3b1;
+  --code-header-muted-color: #ebebeb;
+  --code-header-icon-color: #d1d1d1;
+  --clipboard-checked-color: #43c743;
+
 } // light-syntax

_sass/colors/light-typography.scss

@@ -3,21 +3,22 @@
  */
 
 @mixin light-scheme {
-  /* Common */
+  /* Framework color */
   --body-bg: #fafafa;
   --mask-bg: #c1c3c5;
   --main-wrapper-bg: white;
   --main-border-color: #f3f3f3;
-  --btn-border-color: #e9ecef;
-  --text-color: #333333;
+
+  /* Common color */
+  --text-color: #34343c;
+  --text-muted-color: gray;
+  --heading-color: black;
   --blockquote-border-color: #eee;
   --blockquote-text-color: #9a9a9a;
   --link-color: #2a408e;
   --link-underline-color: #dee2e6;
-  --text-muted-color: gray;
-  --tb-odd-bg: #fbfcfd;
-  --tb-border-color: #eaeaea;
   --button-bg: #fff;
+  --btn-border-color: #e9ecef;
   --btn-backtotop-color: #686868;
   --btn-backtotop-border-color: #f1f1f1;
   --btn-box-shadow: #eaeaea;
@@ -25,16 +26,17 @@
   --checkbox-checked-color: #07a8f7;
 
   /* Sidebar */
-  --sidebar-bg: radial-gradient(
-    circle,
-    rgba(42, 30, 107, 1) 0%,
-    rgba(35, 37, 46, 1) 100%);
-  --nav-cursor-color: #fcfcfc;
+  --sidebar-bg: #eeeeee;
+  --sidebar-muted-color: #a2a19f;
+  --sidebar-active-color: #424242;
+  --nav-cursor-color: #757575;
+  --sidebar-btn-bg: white;
 
   /* Topbar */
-  --topbar-wrapper-bg: white;
   --topbar-text-color: rgb(78, 78, 78);
-  --search-wrapper-bg: #f5f5f5;
+  --topbar-wrapper-bg: white;
+  --search-wrapper-bg: rgb(245 245 245 / 50%);
+  --search-wrapper-border-color: rgb(245 245 245);
   --search-tag-bg: #f8f9fa;
   --search-icon-color: #c2c6cc;
   --input-focus-border-color: var(--btn-border-color);
@@ -42,12 +44,9 @@
   /* Home page */
   --post-list-text-color: dimgray;
   --btn-patinator-text-color: #555555;
-  --btn-paginator-hover-color: #e9ecef;
-  --btn-active-bg: #2a408e;
-  --btn-active-border-color: #007bff;
-  --btn-text-color: #f8f8f8;
-  --btn-paginator-border-color: #f1f1f1;
-  --btn-paginator-shadow: #4b92d2;
+  --btn-paginator-hover-color: var(--sidebar-bg);
+  --btn-paginator-border-color: var(--sidebar-bg);
+  --btn-text-color: #676666;
   --pin-bg: #f5f5f5;
   --pin-color: #999fa4;
 
@@ -57,20 +56,26 @@
   --card-box-shadow: rgba(234, 234, 234, 0.7686274509803922);
   --label-color: #616161;
   --relate-post-date: rgba(30, 55, 70, 0.4);
+  --footnote-target-bg: lightcyan;
   --tag-bg: rgba(0, 0, 0, 0.075);
   --tag-border: #dee2e6;
   --tag-shadow: var(--btn-border-color);
   --tag-hover: rgb(222, 226, 230);
-  --categories-hover-bg: var(--btn-border-color);
+  --tb-odd-bg: #fbfcfd;
+  --tb-border-color: #eaeaea;
   --dash-color: silver;
+  --preview-img-bg: radial-gradient(circle, rgb(255 255 255) 0%, rgb(249 249 249) 100%);
+  --kbd-wrap-color: #bdbdbd;
+  --kbd-text-color: var(--text-color);
+  --kbd-bg-color: white;
+
+  /* Categories */
+  --categories-hover-bg: var(--btn-border-color);
+  --categories-icon-hover-color: darkslategray;
 
   /* Archive */
   --timeline-color: rgba(0, 0, 0, 0.075);
   --timeline-node-bg: #c2c6cc;
   --timeline-year-dot-color: #ffffff;
 
-  /* Footer */
-  --footer-bg-color: #ffffff;
-  --footnote-target-bg: lightcyan;
-  --footer-link: #424242;
 } // light-scheme

_sass/jekyll-theme-chirpy.scss

@@ -1,22 +1,24 @@
 /*!
  * The styles for Jekyll theme Chirpy
  *
- * Chirpy v3.0.2 (https://github.com/cotes2020/jekyll-theme-chirpy)
- * © 2021 Cotes Chung
+ * Chirpy v5.0.0 (https://github.com/cotes2020/jekyll-theme-chirpy)
+ * © 2019 Cotes Chung
  * MIT Licensed
  */
 
-@import "colors/light-typography";
-@import "colors/dark-typography";
+@import
+  "colors/light-typography",
+  "colors/dark-typography",
 
-@import "addon/module";
-@import "addon/variables";
-@import 'addon/syntax';
-@import "addon/commons";
+  "addon/module",
+  "addon/variables",
+  "variables-hook",
+  "addon/syntax",
+  "addon/commons",
 
-@import "layout/home";
-@import "layout/post";
-@import "layout/tags";
-@import "layout/archives";
-@import "layout/categories";
-@import "layout/category-tag";
+  "layout/home",
+  "layout/post",
+  "layout/tags",
+  "layout/archives",
+  "layout/categories",
+  "layout/category-tag";

_sass/layout/archives.scss

@@ -14,34 +14,12 @@
 
 #archives {
   letter-spacing: 0.03rem;
-  li {
-    font-size: 1.1rem;
-    line-height: 3rem;
-    &:nth-child(odd) {
-      background-color: var(--main-wrapper-bg, #fff);
-      background-image: linear-gradient(
-        to left, #fff, #fbfbfb, #fbfbfb, #fbfbfb, #fff);
-    }
-    > div {
-      white-space: nowrap;
-      overflow: hidden;
-      text-overflow: ellipsis;
-    }
-  }
 
   span.lead {
     font-size: 1.5rem;
     position: relative;
     left: 8px;
 
-    &:not(:first-child) {
-      position: relative;
-      left: 4px;
-      &::after {
-        left: 67px;
-      }
-    }
-
     &::after { /* Year dot */
       content: "";
       display: block;
@@ -59,11 +37,69 @@
       box-shadow: 0 0 2px 0 #c2c6cc;
       z-index: 1;
     }
+
+    &:not(:first-child) {
+      position: relative;
+      left: 4px;
+
+      &::after {
+        left: 67px;
+      }
+    }
+
   } // #archives span.lead
 
+  ul {
+    li {
+      font-size: 1.1rem;
+      line-height: 3rem;
+
+      div {
+        white-space: nowrap;
+        overflow: hidden;
+        text-overflow: ellipsis;
+
+        a {
+          /* post title in Archvies */
+          margin-left: 2.5rem;
+          position: relative;
+          top: 0.1rem;
+        }
+      }
+
+      &:nth-child(odd) {
+        background-color: var(--main-wrapper-bg, #fff);
+        background-image: linear-gradient(to left, #fff, #fbfbfb, #fbfbfb, #fbfbfb, #fff);
+      }
+
+      &::after {
+        @extend %date-timeline;
+
+        height: 2.8rem;
+        top: -1.3rem;
+      }
+
+      &:first-child::before {
+        @extend %date-timeline;
+
+        height: 3.06rem;
+        top: -1.61rem;
+      }
+    }
+
+    &:not(:last-child) > li:last-child::after {
+      height: 3.4rem;
+    }
+
+    &:last-child > li:last-child::after {
+      display: none;
+    }
+  } // #archives ul
+
   .date {
     white-space: nowrap;
     display: inline-block;
+
     &.month {
       width: 1.4rem;
       text-align: center;
@@ -86,6 +122,7 @@
         z-index: 1;
       }
     }
+
     &.day {
       font-size: 85%;
       font-family: 'Lato', sans-serif;
@@ -93,43 +130,16 @@
       margin-right: -2px;
       width: 1.2rem;
       position: relative;
-      left: -.15rem;
+      left: -0.15rem;
     }
   } // #archives .date
 
-  ul {
-    > li {
-      > div > a {
-        /* post title in Archvies */
-        margin-left: 2.5rem;
-        position: relative;
-        top: 0.1rem;
-      }
-      &::after {
-        @extend %date-timeline;
-        height: 2.8rem;
-        top: -1.3rem;
-      }
-      &:first-child::before {
-        @extend %date-timeline;
-        height: 3.06rem;
-        top: -1.61rem;
-      }
-    }
-    &:not(:last-child) > li:last-child::after {
-      height: 3.4rem;
-    }
-    &:last-child > li:last-child::after {
-      display: none;
-    }
-  } // #archives ul
-
 } // #archives
 
-
 @media all and (max-width: 576px) {
   #archives {
     margin-top: -1rem;
+
     ul {
       letter-spacing: 0;
     }

_sass/layout/categories.scss

@@ -8,16 +8,22 @@
 
 .categories {
   margin-bottom: 2rem;
+
   .card-header {
     padding-right: 12px;
   }
+
+  i {
+    @extend %category-icon-color;
+
+    font-size: 86%; // fontawesome icons
+  }
+
   .list-group-item {
     border-left: none;
     border-right: none;
     padding-left: 2rem;
-    > i {
-      @extend %category-icon-color;
-    }
+
     &:first-child {
       border-top-left-radius: 0;
       border-top-right-radius: 0;
@@ -25,16 +31,6 @@
 
   }
 
-  .card-header > span > i:first-child {
-    @extend %category-icon-color;
-  }
-
-  i {
-    &.far, &.fas {
-      font-size: 86%; // fontawesome icons
-    }
-  }
-
 } // .categories
 
 .category-trigger {
@@ -42,12 +38,19 @@
   height: 1.7rem;
   border-radius: 50%;
   text-align: center;
-  color: #6c757d!important;
-  > i.fas {
+  color: #6c757d !important;
+
+  &:hover {
+    i {
+      color: var(--categories-icon-hover-color);
+    }
+  }
+
+  i {
     position: relative;
     height: 0.7rem;
     width: 1rem;
-    transition: 300ms ease all;
+    transition: transform 300ms ease;
   }
 }
 

_sass/layout/category-tag.scss

@@ -2,10 +2,17 @@
   Style for page Category and Tag
 */
 
-#page-category, #page-tag {
+.dash {
+  margin: 0 0.5rem 0.6rem 0.5rem;
+  border-bottom: 2px dotted var(--dash-color);
+}
+
+#page-category,
+#page-tag {
   ul > li {
     line-height: 1.5rem;
     padding: 0.6rem 0;
+
     &::before { // dot
       background: #999;
       width: 5px;
@@ -17,14 +24,16 @@
       top: 0.6rem;
       margin-right: 0.5rem;
     }
+
     > a { /* post's title */
-      font-size: 1.1rem;
       @extend %no-bottom-border;
+
+      font-size: 1.1rem;
     }
+
     > span:last-child {
       white-space: nowrap;
-    }
-    /* post's date */
+    } /* post's date */
   }
 }
 
@@ -36,26 +45,24 @@
   font-size: 1.25rem;
 }
 
-a:hover {
-  #page-category &,
-  #page-tag &,
-  #access-lastmod & {
+#page-category,
+#page-tag,
+#access-lastmod {
+  a:hover {
     @extend %link-hover;
+
     margin-bottom: -1px; // Avoid jumping
   }
 }
 
-.dash {
-  margin: 0 .5rem .6rem .5rem;
-  border-bottom: 2px dotted var(--dash-color);
-}
-
 @media all and (max-width: 576px) {
-  #page-category, #page-tag {
+  #page-category,
+  #page-tag {
     ul > li {
       &::before {
-        margin: 0 .5rem;
+        margin: 0 0.5rem;
       }
+
       > a {
         white-space: nowrap;
         overflow: hidden;

_sass/layout/home.scss

@@ -2,6 +2,57 @@
   Style for Homepage
 */
 
+.pagination {
+  color: var(--btn-patinator-text-color);
+  font-family: 'Lato', sans-serif;
+
+  a:hover {
+    text-decoration: none;
+  }
+
+  .page-item {
+    .page-link {
+      color: inherit;
+      width: 2.5rem;
+      height: 2.5rem;
+      padding: 0;
+      display: -webkit-box;
+      -webkit-box-pack: center;
+      -webkit-box-align: center;
+      border-radius: 50%;
+      border: 1px solid var(--btn-paginator-border-color);
+      background-color: var(--button-bg);
+
+      &:hover {
+        background-color: var(--btn-paginator-hover-color);
+      }
+    }
+
+    &.active {
+      .page-link {
+        background-color: var(--btn-paginator-hover-color);
+        color: var(--btn-text-color);
+      }
+    }
+
+    &.disabled {
+      cursor: not-allowed;
+
+      .page-link {
+        color: rgba(108, 117, 125, 0.57);
+        border-color: var(--btn-paginator-border-color);
+        background-color: var(--button-bg);
+      }
+    }
+
+    &:first-child .page-link,
+    &:last-child .page-link {
+      border-radius: 50%;
+    }
+  } // .page-item
+
+} // .pagination
+
 #post-list {
   margin-top: 1rem;
   padding-right: 0.5rem;
@@ -11,6 +62,10 @@
     padding-bottom: 1rem;
     border-bottom: 1px solid var(--main-border-color);
 
+    a:hover {
+      @extend %link-hover;
+    }
+
     h1 {
       font-size: 1.4rem;
       margin: 0;
@@ -19,9 +74,14 @@
     .post-meta {
       i {
         font-size: 0.73rem;
+
+        &:not(:first-child) {
+          margin-left: 1.2rem;
+        }
       }
-      span:not(:last-child) {
-        margin-right: 1.2rem;
+
+      em {
+        @extend %normal-font-style;
       }
     }
 
@@ -29,6 +89,7 @@
       margin-top: 0.6rem;
       margin-bottom: 0.6rem;
       color: var(--post-list-text-color);
+
       > p {
         /* Make preview shorter on the homepage */
         margin: 0;
@@ -46,81 +107,35 @@
         padding-left: 3px;
         color: var(--pin-color);
       }
+
       > span {
         display: none;
       }
     }
 
   } // .post-preview
-
 } // #post-list
 
-.pagination {
-  font-size: 1rem;
-  a:hover {
-    text-decoration: none;
-  }
-
-  .page-item {
-    .page-link {
-      color: var(--btn-patinator-text-color);
-      width: 2.5rem;
-      height: 2.5rem;
-      padding: 0;
-      text-align: center;
-      display: -webkit-box;
-      display: flex;
-      -webkit-box-pack: center;
-      justify-content: center;
-      -webkit-box-align: center;
-      align-items: center;
-      border-radius: 50%;
-      border: 1px solid var(--btn-paginator-border-color);
-      font-family: 'Lato', sans-serif;
-      background-color: var(--button-bg);
-      &:hover {
-        background-color: var(--btn-paginator-hover-color)
-      }
-    }
-    &.active {
-      .page-link {
-        background-color: var(--btn-active-bg);
-        border-color: var(--btn-active-border-color);
-        box-shadow: 0 0 8px 0 var(--btn-paginator-shadow) !important;
-        color: var(--btn-text-color);
-      }
-    }
-    &.disabled {
-      cursor: not-allowed;
-      .page-link {
-        color: rgba(108, 117, 125, 0.57);
-        border-color: var(--btn-paginator-border-color);
-        background-color: var(--button-bg);
-      }
-    }
-    &:first-child .page-link,
-    &:last-child .page-link {
-      border-radius: 50%;
-    }
-    &:not(:last-child) {
-      margin-right: 0.7rem;
-    }
-  } // .page-item
-
-} // .pagination
-
 /* Hide SideBar and TOC */
 @media all and (max-width: 830px) {
   .pagination {
-    justify-content: center;
+    justify-content: space-evenly;
+
+    .page-item {
+      &:not(:first-child):not(:last-child) {
+        display: none;
+      }
+
+    }
+
   }
 }
 
 /* Sidebar is visible */
 @media all and (min-width: 831px) {
-
   #post-list {
     margin-top: 1.5rem;
+
     .post-preview .post-meta {
       .pin {
         background: var(--pin-bg);
@@ -140,11 +155,24 @@
 
   .pagination {
     font-size: 0.85rem;
-    .page-item .page-link {
-      width: 2.2rem;
-      height: 2.2rem;
+
+    .page-item {
+      &:not(:last-child) {
+        margin-right: 0.7rem;
+      }
+
+      .page-link {
+        width: 2rem;
+        height: 2rem;
+      }
+
     }
-  }
+
+    .page-index {
+      display: none;
+    }
+
+  } // .pagination
 
 }
 

_sass/layout/post.scss

@@ -4,7 +4,7 @@
 
 @mixin btn-sharing-color($light-color, $important: false) {
   @if $important {
-    color: var(--btn-share-color, $light-color)!important;
+    color: var(--btn-share-color, $light-color) !important;
   } @else {
     color: var(--btn-share-color, $light-color);
   }
@@ -16,34 +16,37 @@
   border-color: var(--btn-border-color);
 }
 
-@mixin dot($pl: 0.2rem, $pr: 0.4rem) {
+@mixin dot($pl: 0.25rem, $pr: 0.25rem) {
   content: "\2022";
-  color: rgba(158, 158, 158, 0.8);
   padding-left: $pl;
   padding-right: $pr;
 }
 
-#post-wrapper .post-meta {
-  > div:nth-child(2) {
-    > span:not(:first-child)::before {
-      @include dot;
+%text-color {
+  color: var(--text-color);
+}
+
+h1 + .post-meta {
+  span + span::before {
+    @include dot;
+  }
+
+  em {
+    @extend %text-color;
+
+    a {
+      @extend %text-color;
     }
   }
-
-  #pv::after {
-    content: " views";
-  }
-
-  .readtime::after {
-    content: " read";
-  }
 }
 
-.post-content {
-  .preview-img {
-    margin-top: 0;
-    margin-bottom: 2.5rem;
-    @include align-center;
+img.preview-img {
+  margin-top: 3.75rem;
+  margin-bottom: 0;
+  border-radius: 6px;
+
+  &.bg[data-loaded=true] {
+    background: var(--preview-img-bg);
   }
 }
 
@@ -51,6 +54,10 @@
   margin-top: 6rem;
   border-bottom: 1px double var(--main-border-color);
   font-size: 0.85rem;
+
+  .post-meta a {
+    @extend %link-underline;
+  }
 }
 
 .post-tags {
@@ -63,25 +70,50 @@
 
   .btn {
     @include btn-post-nav;
+
     color: var(--link-color);
+
     &:hover {
       background: #2a408e;
       color: #fff;
       border-color: #2a408e;
     }
+
     &.disabled {
       @include btn-post-nav;
+
       pointer-events: auto;
       cursor: not-allowed;
       background: none;
       color: gray;
+
       &:hover {
         border-color: none;
       }
     }
+
     &.btn-outline-primary.disabled:focus {
       box-shadow: none;
     }
+
+    &::before {
+      color: var(--text-muted-color);
+      font-size: 0.65rem;
+      text-transform: uppercase;
+      content: attr(prompt);
+    }
+
+    &:first-child {
+      border-top-right-radius: 0;
+      border-bottom-right-radius: 0;
+      left: 0.5px;
+    }
+
+    &:last-child {
+      border-top-left-radius: 0;
+      border-bottom-left-radius: 0;
+      right: 0.5px;
+    }
   }
 
   p {
@@ -91,25 +123,7 @@
     white-space: normal;
   }
 
-  a {
-    &::before {
-      color: var(--text-muted-color);
-      font-size: 0.65rem;
-      text-transform: uppercase;
-      content: attr(prompt);
-    }
-    &:first-child {
-      border-top-right-radius: 0;
-      border-bottom-right-radius: 0;
-      left: 0.5px;
-    }
-    &:last-child {
-      border-top-left-radius: 0;
-      border-bottom-left-radius: 0;
-      right: 0.5px;
-    }
-  }
-} // .post-navigation
+} /* .post-navigation */
 
 @keyframes fade-up {
   from {
@@ -131,27 +145,36 @@
   top: 4rem;
   transition: top 0.2s ease-in-out;
   animation: fade-up 0.8s;
-  &.topbar-down {
-    top: 6rem;
+}
+
+#toc li a {
+  font-size: 0.8rem;
+
+  &.nav-link:not(.active) {
+    color: inherit;
   }
-  > span {
-    @include panel-label;
+
+}
+
+nav[data-toggle=toc] {
+  .nav {
+    .nav > li > a.active {
+      font-weight: 600 !important;
+    }
   }
 }
 
-#toc li>a {
-  line-height: 1rem;
-  padding-top: 0.5rem;
-  padding-bottom: 0.5rem;
-}
-
-
-/*--- Related Posts ---*/
+/* --- Related Posts --- */
 
 #related-posts {
-  >h3 {
+  > h3 {
     @include label(1.1rem, 600);
   }
+
+  em {
+    @extend %normal-font-style;
+  }
+
   .card {
     border-color: var(--card-border-color);
     background-color: var(--card-bg);
@@ -159,13 +182,15 @@
     -webkit-transition: all 0.3s ease-in-out;
     -moz-transition: all 0.3s ease-in-out;
     transition: all 0.3s ease-in-out;
+
     h3 {
-      color: var(--text-color);
+      @extend %text-color;
     }
+
     &:hover {
       -webkit-transform: translate3d(0, -3px, 0);
       transform: translate3d(0, -3px, 0);
-      box-shadow: 0 10px 15px -4px rgba(0,0,0,0.15);
+      box-shadow: 0 10px 15px -4px rgba(0, 0, 0, 0.15);
     }
   }
 
@@ -190,7 +215,8 @@
   ul {
     list-style-type: none;
     padding-inline-start: 1.5rem;
-    >li::before {
+
+    > li::before {
       background: #c2c9d4;
       width: 5px;
       height: 5px;
@@ -204,11 +230,17 @@
   }
 }
 
-#post-extend-wrapper {
+#tail-wrapper {
   min-height: 2rem;
-  #disqus_thread {
+
+  > div:last-of-type {
     margin-bottom: 2rem;
   }
+
+  #disqus_thread {
+    min-height: 8.5rem;
+  }
+
 }
 
 .post-tail-bottom a {
@@ -216,57 +248,70 @@
 }
 
 %btn-share-hovor {
-  color: var(--btn-share-hover-color)!important;
+  color: var(--btn-share-hover-color) !important;
 }
 
 .share-wrapper {
   vertical-align: middle;
   user-select: none;
+
   .share-icons {
     font-size: 1.2rem;
+
     a {
       &:not(:last-child) {
         margin-right: 0.25rem;
       }
+
       &:hover {
         text-decoration: none;
-        >i {
+
+        > i {
           @extend %btn-share-hovor;
         }
       }
     }
-    >i {
-      padding-top: 0.35rem;
+
+    > i {
+      position: relative;
+      bottom: 1px;
+
+      @extend %cursor-pointer;
+
       &:hover {
         @extend %btn-share-hovor;
       }
     }
+
     .fab {
       &.fa-twitter {
-        @include btn-sharing-color(rgba(29, 161, 242, 1.00));
+        @include btn-sharing-color(rgba(29, 161, 242, 1));
       }
+
       &.fa-facebook-square {
         @include btn-sharing-color(rgb(66, 95, 156));
       }
+
       &.fa-telegram {
         @include btn-sharing-color(rgb(39, 159, 217));
       }
+
       &.fa-weibo {
         @include btn-sharing-color(rgb(229, 20, 43));
       }
     }
 
-  } // .share-icons
+  } /* .share-icons */
 
   .fas.fa-link {
     @include btn-sharing-color(rgb(171, 171, 171));
   }
 
-} // .share-wrapper
-
+} /* .share-wrapper */
 
 .share-label {
   @include label(inherit, 400, inherit);
+
   &::after {
     content: ":";
   }
@@ -274,40 +319,35 @@
 
 .license-wrapper {
   line-height: 1.2rem;
-  >a {
-    font-weight: 600;
+
+  > a {
+    color: var(--text-color);
+
     &:hover {
       @extend %link-hover;
     }
   }
-  i {
-    font-weight: 400;
-  }
+
   span:last-child {
     font-size: 0.85rem;
   }
-} // .license-wrapper
 
+} /* .license-wrapper */
 
 @media all and (max-width: 576px) {
+  .preview-img[data-src] {
+    margin-top: 2.2rem;
+  }
+
   .post-tail-bottom {
-    -ms-flex-wrap: wrap-reverse!important;
-    flex-wrap: wrap-reverse!important;
-    >div:first-child {
+    -ms-flex-wrap: wrap-reverse !important;
+    flex-wrap: wrap-reverse !important;
+
+    > div:first-child {
       width: 100%;
       margin-top: 1rem;
     }
   }
-
-  .post-content > div[class^='language-'] {
-    @include ml-mr(-1.25rem);
-    border-radius: 0;
-
-    &::before { // the lang badge
-      right: 1rem;
-    }
-  }
-
 }
 
 @media all and (max-width: 768px) {
@@ -316,34 +356,17 @@
   }
 }
 
-@media all and (min-width: 768px) {
-  #post-wrapper {
-    .post-meta {
-      >div:not(:first-child)::before {
-        @include dot(0.5rem, 0.2rem);
-      }
-      &.flex-column {
-        -webkit-box-orient: horizontal!important;
-        -webkit-box-direction: normal!important;
-        -ms-flex-direction: row!important;
-        flex-direction: row!important;
-      }
-    }
-  } // .post
-}
-
-@media all and (min-width: 768px) and (max-width: 830px) {
-  .post img {
-    max-width: calc(100% + 2rem);
-  }
-}
-
 /* Hide SideBar and TOC */
-@media all and (max-width: 830px) {
+@media all and (max-width: 849px) {
   .post-navigation {
     padding-left: 0;
     padding-right: 0;
-    margin-left: -.5rem;
-    margin-right: -.5rem;
+    margin-left: -0.5rem;
+    margin-right: -0.5rem;
+  }
+
+  .preview-img[data-src] {
+    max-width: 100vw;
+    border-radius: 0;
   }
 }

_sass/layout/tags.scss

@@ -10,6 +10,7 @@
   letter-spacing: 0;
   border: 1px solid var(--tag-border) !important;
   box-shadow: 0 0 3px 0 var(--tag-shadow);
+
   span {
     margin-left: 0.6em;
     font-size: 0.7em;

_sass/variables-hook.scss

@@ -0,0 +1,3 @@
+/*
+  Appending custom SCSS variables will override the default ones in `_sass/addon/variables.scsss`
+*/