refactor: update the sass mixed declarations (#1872)

See: https://sass-lang.com/d/mixed-decls

_sass/colors/typography-dark.scss

@@ -84,27 +84,29 @@
   --prompt-danger-bg: rgb(86, 28, 8, 0.8);
   --prompt-danger-icon-color: #cd0202;
 
-  /* tags */
+  /* Tags */
   --tag-border: rgb(59, 79, 88);
   --tag-shadow: rgb(32, 33, 33);
   --dash-color: rgb(63, 65, 68);
   --search-tag-bg: #292828;
 
-  /* categories */
+  /* Categories */
   --categories-border: rgb(64, 66, 69, 0.5);
   --categories-hover-bg: rgb(73, 75, 76);
   --categories-icon-hover-color: white;
 
-  /* archives */
+  /* Archive */
   --timeline-node-bg: rgb(150, 152, 156);
   --timeline-color: rgb(63, 65, 68);
   --timeline-year-dot-color: var(--timeline-color);
 
+  color-scheme: dark;
+
   .light {
     display: none;
   }
 
-  /* categories */
+  /* Categories */
   .categories.card,
   .list-group-item {
     background-color: var(--card-bg);
@@ -138,8 +140,6 @@
     );
   }
 
-  color-scheme: dark;
-
   /* stylelint-disable-next-line selector-id-pattern */
   #disqus_thread {
     color-scheme: none;

_sass/colors/typography-light.scss

@@ -92,14 +92,6 @@
   --tag-hover: rgb(222, 226, 230);
   --search-tag-bg: #f8f9fa;
 
-  [class^='prompt-'] {
-    --link-underline-color: rgb(219, 216, 216);
-  }
-
-  .dark {
-    display: none;
-  }
-
   /* Categories */
   --categories-border: rgba(0, 0, 0, 0.125);
   --categories-hover-bg: var(--btn-border-color);
@@ -109,4 +101,12 @@
   --timeline-color: rgba(0, 0, 0, 0.075);
   --timeline-node-bg: #c2c6cc;
   --timeline-year-dot-color: #ffffff;
+
+  [class^='prompt-'] {
+    --link-underline-color: rgb(219, 216, 216);
+  }
+
+  .dark {
+    display: none;
+  }
 } /* light-scheme */