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CSS

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JavaScript

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HTML 

              
                <!-- untouched from codepen challenge "List Styles" https://codepen.io/challenges/2022/april/1 -->
<h1>Todo List</h1>
<ul>
	<li>Groceries
		<ul>
			<li>3 Tomatoes</li>
			<li>1 bunch of cherries</li>
			<li>6 onions</li>
			<li>3 heads of garlic</li>
			<li>1 bag spring mix</li>
		</ul>
	</li>
	<li>Cancel gym membership</li>
	<li>Clean gutters</li>
	<li>Take package to the post office</li>
	<li>Call Avery about Ali's party (afternoon)</li>
	<li>Sort recycling & put out trash</li>
</ul>
!

CSS 

              
                @import url("https://fonts.googleapis.com/css2?family=Lato:wght@400;900&display=swap");
*,
*::before,
*::after {
	margin: 0;
	padding: 0;
	box-sizing: border-box;
	transform-style: preserve-3d;
}
:root {
	--wood-color1: hsl(10, 50%, 30%); /*pole*/
	--wood-color2: hsl(10, 50%, 30%); /*li*/
	--wood-color3: hsl(10, 50%, 40%); /*sub li*/
	--wood-pattern-ver: url(https://i.imgur.com/xaBlaEJ.png);
	--wood-pattern-hor: url(https://i.imgur.com/e3bGQNX.png);
}
body {
	min-height: 100vh;
	display: grid;
	place-items: center;
	perspective: 1000px;
	padding: 1rem;
	background-image: url(https://images.pexels.com/photos/276299/pexels-photo-276299.jpeg?auto=compress&cs=tinysrgb&w=1260&h=750&dpr=1);
	background-size: cover;
	background-position: center;
	font-family: "Lato", sans-serif;
	overflow: hidden;
}
body > ul { --count: 6; }
body > ul > li:nth-child(1) { --idx: 0; }
body > ul > li:nth-child(2) { --idx: 1; }
body > ul > li:nth-child(3) { --idx: 2; }
body > ul > li:nth-child(4) { --idx: 3; }
body > ul > li:nth-child(5) { --idx: 4; }
body > ul > li:nth-child(6) { --idx: 5; }

body > ul {
	display: grid;
	row-gap: 1rem;
	grid-template-columns: 1fr 1fr;
	list-style: none;
	padding: 2rem;
	--pole-width: 1.5rem;
	padding-bottom: 15rem;
	position: relative;
	animation: rotateList 10s linear infinite;
	text-shadow: 1px 1px 2px rgb(0 0 0 /0.5);
	user-select: none;
	cursor: default;
}

/* pole  */
body > ul::after {
	content: "";
	position: absolute;
	left: calc(50% - var(--pole-width) / 2);
	background-color: var(--wood-color1);
	background-image: linear-gradient(to right, #0009, #0000, #fff4, #0007),
		var(--wood-pattern-ver);
	background-size: 300% auto;
	background-position: 0%, 0%;
	height: 100%;
	width: var(--pole-width);
	border-radius: calc(var(--pole-width) * 0.5) calc(var(--pole-width) * 0.5)
		calc(var(--pole-width) * 0.25) calc(var(--pole-width) * 0.25);
	animation: rotateList 10s linear infinite reverse,
		backgroundShift 10s linear infinite;
}
body > ul:hover, body > ul:hover::after { animation-play-state: paused; }
@keyframes rotateList { to { transform: rotateY(-360deg); } }
@keyframes backgroundShift { to { background-position: 0%, 150%; } }

body > ul > li {
	grid-column: 2;
	position: relative;
	padding: 0.5rem 1rem;
	transform-origin: center left;
	transform: 
		rotateY(calc(360deg / var(--count) * var(--idx)))
		translateX(calc(var(--pole-width) / 2 - 1px));
	position: relative;
	width: max-content;
	max-width: 15rem;
	color: white;
}
body > ul > li:nth-child(1){
	width: unset;
}
body > ul > li::after {
	content: "";
	position: absolute;
	inset: 0;
	background-color: var(--wood-color2);
	background-image: 
		linear-gradient(to right, #0004, #0000 1rem),
		var(--wood-pattern-hor);
	transform: translateZ(-1px);
	z-index: -1;
	border-radius: 0 100vw 100vw 0;
	box-shadow: inset 2px -2px 4px rgb(0 0 0 /0.5),
		inset -2px 2px 4px rgb(255 255 255 /0.2);
}

body > ul > li > ul {
	--spacing: 0.25rem;
	--inset-inline: 1rem;
	position: absolute;
	top: calc(100% + var(--spacing));
	left: var(--inset-inline);
	right: calc(var(--inset-inline) * 2);
	list-style: none;
	display: grid;
	gap: var(--spacing);
}

body > ul > li > ul > li {
	padding: 0.5rem 1rem;
	position: relative;
	color: white;
}

body > ul > li > ul > li::before {
	content: "";
	position: absolute;
	height: var(--spacing);
	inset-inline: 1rem;
	bottom: 100%;
	background-image: linear-gradient(
		to right,
		#000 0.25rem,
		#0000 0.25rem calc(100% - 0.25rem),
		#000 calc(100% - 0.25rem)
	);
}
body > ul > li > ul > li::after {
	content: "";
	position: absolute;
	inset: 0;
	transform: translateZ(-1px);
	background-color: var(--wood-color3);
	background-image: linear-gradient(to right, #0004, #0000 1rem),
		var(--wood-pattern-hor);
	z-index: -1;
	border-radius: 0.25rem;
	box-shadow: inset 1px -1px 2px rgb(0 0 0 /0.5),
		inset -1px 1px 2px rgb(255 255 255 /0.2);
}
h1 {
	position: absolute;
	top: 1rem;
	text-transform: uppercase;
	font-weight: 700;
	transform: translateZ(-5px);
}
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