* {
	border: 0;
	box-sizing: border-box;
	margin: 0;
	padding: 0;
}
:root {
	--hue: 223;
	--bg: hsl(var(--hue),10%,90%);
	--fg: hsl(var(--hue),10%,10%);
	--trans-dur: 0.3s;
	font-size: calc(16px + (24 - 16) * (100vw - 320px) / (1280 - 320));
}
body {
	background: var(--bg);
	color: var(--fg);
	font: 1em/1.5 sans-serif;
	height: 100vh;
	display: grid;
	place-items: center;
	transition:
		background-color var(--trans-dur),
		color var(--trans-dur);
}

.pl {
	display: block;
	width: 8em;
	height: 8em;
}
.pl__ring,
.pl__ball1,
.pl__ball2 {
	animation-duration: 2s;
	animation-timing-function: ease-in-out;
	animation-iteration-count: infinite;
	transform-origin: 32px 32px;
}
.pl__ring {
	animation-name: ring;
}
.pl__ball1 {
	animation-name: ball1;
}
.pl__ball2 {
	animation-name: ball2;
}

/* Dark theme  */
@media (prefers-color-scheme: dark) {
	:root {
		--bg: hsl(var(--hue),10%,10%);
		--fg: hsl(var(--hue),10%,90%);
	}
}

/* Animation */
@keyframes ring {
	from {
		animation-timing-function: ease-in-out;
		stroke-dashoffset: -122.52;
		transform: rotate(135deg);
	}
	15% {
		animation-timing-function: ease-in;
		stroke-dashoffset: -122.52;
		transform: rotate(90deg);
	}
	35% {
		animation-timing-function: ease-out;
		stroke-dashoffset: -65.34;
		transform: rotate(297.5deg);
	}
	55% {
		animation-timing-function: ease-in-out;
		stroke-dashoffset: -122.52;
		transform: rotate(505deg);
	}
	70% {
		animation-timing-function: ease-in-out;
		stroke-dashoffset: -122.52;
		transform: rotate(490deg);
	}
	85%,
	to {
		stroke-dashoffset: -122.52;
		transform: rotate(497.5deg);
	}
}
@keyframes ball1 {
	from {
		transform: rotate(14deg);
	}
	20% {
		transform: rotate(-7deg);
	}
	60% {
		transform: rotate(399deg);
	}
	75% {
		transform: rotate(361deg);
	}
	90%,
	to {
		transform: rotate(374deg);
	}
}
@keyframes ball2 {
	from {
		transform: rotate(-21deg);
	}
	25% {
		transform: rotate(-47deg);
	}
	60% {
		transform: rotate(364deg);
	}
	75% {
		transform: rotate(326deg);
	}
	90%,
	to {
		transform: rotate(339deg);
	}
}