* {
	border: 0;
	box-sizing: border-box;
	margin: 0;
	padding: 0;
}
:root {
	--hue: 223;
	--bg: hsl(var(--hue),90%,90%);
	--fg: hsl(var(--hue),90%,10%);
	--trans-dur: 0.3s;
	--trans-timing: cubic-bezier(0.65,0,0.35,1);
	font-size: calc(40px + (80 - 40) * (100vw - 320px) / (2560 - 320));
}
body,
input {
	font: 1em/1.5 sans-serif;
}
body {
	background-color: var(--bg);
	color: var(--fg);
	display: grid;
	place-items: center;
	height: 100vh;
	transition:
		background-color var(--trans-dur),
		color var(--trans-dur);
}
.switch,
.switch__input {
	-webkit-tap-highlight-color: transparent;
}
.switch {
	position: relative;
	width: 3em;
	height: 1.5em;
}
.switch__check {
	display: block;
	transform: translateX(0) rotate(0);
	transition: transform var(--trans-dur) var(--trans-timing);
	z-index: 1;
}
.switch__check-line {
	transform: translate(0,0);
	transition:
		stroke var(--trans-dur) var(--trans-timing),
		stroke-dashoffset var(--trans-dur) var(--trans-timing),
		transform var(--trans-dur) var(--trans-timing);
}
.switch__input {
	background-color: hsla(var(--hue),90%,50%,0);
	border-radius: 1.5em;
	box-shadow:
		0 0 0 0.0625em hsl(var(--hue),10%,50%) inset,
		0 0.25em 1em hsla(var(--hue),90%,10%,0);
	cursor: pointer;
	display: block;
	outline: transparent;
	width: 100%;
	height: 100%;
	transition:
		background-color var(--trans-dur) var(--trans-timing),
		box-shadow var(--trans-dur) var(--trans-timing);
	-webkit-appearance: none;
	appearance: none;
}
.switch__input:before,
.switch__input:after {
	content: "";
	display: block;
}
.switch__input:before {
	background-color: hsl(0,0%,100%);
	border-radius: 50%;
	box-shadow: 0 0.125em 0.25em hsla(var(--hue),90%,10%,0);
	transition:
		box-shadow var(--trans-dur) var(--trans-timing),
		transform var(--trans-dur) var(--trans-timing);
}
.switch__input:after {
	border-radius: 0.75em;
	box-shadow: 0 0 0 0.125em hsla(var(--hue),90%,70%,0);
	width: 100%;
	height: 100%;
	transition: box-shadow 0.15s linear;
}
.switch__input:focus-visible:after {
	box-shadow: 0 0 0 0.125em hsla(var(--hue),90%,70%,1);
}
.switch__check,
.switch__input:before {
	position: absolute;
	top: 0.25em;
	left: 0.25em;
	width: 1em;
	height: 1em;
}
.switch__input:checked {
	background-color: hsla(var(--hue),90%,50%,1);
	box-shadow:
		0 0 0 0.0625em hsl(var(--hue),90%,50%) inset,
		0 0.25em 1em hsla(var(--hue),90%,10%,0.5);
}
.switch__input:checked:before {
	box-shadow: 0 0.125em 0.25em hsla(var(--hue),90%,10%,0.5);
	transform: translateX(1.5em);
}
.switch__input:checked + .switch__check {
	animation: switch-check var(--trans-dur) var(--trans-timing);
	transform: translateX(1.5em) rotate(-225deg);
}
.switch__input:checked + .switch__check .switch__check-line {
	stroke: hsl(var(--hue),90%,50%);
	stroke-dashoffset: 0;
	transform: translate(-1px,-1px);
	transition-delay: 0s, calc(var(--trans-dur) / 2), 0s;
}
.switch__sr {
	overflow: hidden;
	position: absolute;
	width: 1px;
	height: 1px;
}

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

/* Animations */
@keyframes switch-check {
	from {
		transform: translateX(0) rotate(0);
	}
	to {
		transform: translateX(1.5em) rotate(135deg);
	}
}