.menu-list {
	contain          : content;
	position         : fixed;
	z-index          : 1000;
	top              : anchor(bottom);
	left             : anchor(left);
	position-try: flip-inline flip-block;
	color: inherit;   // [popover] gets a `canvastext` color value from useragent.
	li > .menu-list {
			margin: 0 0px;
			top  : anchor(top);
			left : anchor(right);
			position-try: flip-inline;
		}
}