* {
	margin: 0;
	padding: 0;
	box-sizing: border-box;
}

body {
	min-height: 100vh;
	display: grid;
	place-items: center;
	overflow: hidden;
	font-family: sans-serif;
	background-color: rgb(6, 6, 6);
	background-image: linear-gradient(rgb(0, 0, 0, 0.5), rgb(0, 0, 0, 0.5));
	color: white;
	transition: background-color 500ms ease;
}

/* header */
header {
	position: absolute;
	z-index: 999;
	text-align: center;
	top: 0rem;
	padding: 1rem;
	background: inherit;
}

.container {
	position: relative;
	width: min(400px, 100%);
}

/* items */
ul {
	list-style: none;
	width: 100%;
	height: 100%;
	position: relative;
	perspective: 900px;
	transform-style: preserve-3d;
}
ul > li {
	position: absolute;
	left: 50%;
	top: calc(50% - 1.2rem);
	--rotateX: calc(
		1deg * var(--rotateDegrees) * calc(var(--day_idx) - var(--currentDay))
	);
	transform: rotateX(var(--rotateX)) translateZ(190px) translateX(-50%)
		scale(var(--scale, 1));
	--hue: calc(var(--rotateDegrees) * var(--day_idx));
	background-color: hsl(var(--hue), 50%, var(--lightness, 50%));
	width: 70%;
	color: white;
	display: grid;
	grid-template-columns: 2.5rem auto;
	height: 2.4rem;
	transition: transform 500ms ease, background-color 500ms ease;
}

ul > li.active {
	--lightness: 30%;
	--scale: 1.1;
}
ul > li > * {
	display: grid;
	align-items: center;
}
li > time {
	text-align: center;
}
li > span {
	padding-inline-start: 0.5rem;
	color: white;
}

/* controls */
.controls {
	position: absolute;
	top: 50%;
	left: 100%;
	transform: translateY(-50%);
	display: flex;
	flex-direction: column;
	gap: 0.125rem;
}
.controls button {
	width: 1.5rem;
	aspect-ratio: 1;
	font-size: 0.9rem;
	color: white;
	border: none;
	background: #39657e;
	display: grid;
	place-items: center;
}
.controls button:hover,
.controls button:focus {
	background: rgb(6, 60, 131);
}
.controls button:active {
	transform: scale(0.9);
}
.border {
	width: 96%;
	height: 3em;
	border: 1px solid white;
	position: absolute;
	top: 50%;
	left: 50%;
	transform: translate(-50%, -50%);
}