* {
	border: 0;
	box-sizing: border-box;
	margin: 0;
	padding: 0;
}
:root {
	--hue: 223;
	--bg: hsl(var(--hue),90%,10%);
	--fg: hsl(var(--hue),90%,90%);
	--primary: hsl(var(--hue),90%,50%);
	--trans-dur: 0.3s;
	--trans-timing: cubic-bezier(0.65,0,0.35,1);
	font-size: calc(16px + (24 - 16) * (100vw - 320px) / (2560 - 320));
}
body,
button {
	color: var(--fg);
	font: 1em/1.5 "DM Sans", sans-serif;
}
body {
	background-color: var(--bg);
	display: flex;
	height: 100vh;
	transition:
		background-color var(--trans-dur),
		color var(--trans-dur);
}
main {
	margin: auto;
	text-align: center;
}
svg {
	display: block;
}
.btn {
	background-color: transparent;
	cursor: pointer;
	outline: transparent;
	width: 3em;
	height: 3em;
	transition: opacity 0.15s linear;
	-webkit-tap-highlight-color: #0000;
}
.btn:focus-visible,
.btn:hover {
	opacity: 0.5;
}
.btn__icon {
	width: 100%;
	height: auto;
}
.pl {
	--percent: 0;
	margin-bottom: 1.5em;
	overflow: visible;
	width: 16.875em;
	height: 16.875em;
	user-select: none;
	-webkit-user-select: none;
	-moz-user-select: none;
}
.pl__ring,
.pl__ring-glow1,
.pl__ring-glow2 {
	stroke: var(--primary);
	transition: stroke var(--trans-dur);
}
.pl__ring {
	stroke-dashoffset: calc(659.74px * (1 - var(--percent)));
}
.pl__ring-glow1 {
	stroke-dashoffset: calc(502.66px * (1 - var(--percent)));
}
.pl__ring-glow2 {
	stroke-dashoffset: calc(816.82px * (1 - var(--percent)));
}
.pl[data-complete="false"] {
	animation: fade-slide-in 0.5s var(--trans-timing);
}
.pl[data-complete="false"] + .btn {
	visibility: hidden;
}
.pl[data-complete="true"] + .btn {
	animation: fade-in 0.6s;
}

/* Animations */
@keyframes fade-in {
	from {
		animation-timing-function: steps(1,end);
		opacity: 0;
		visibility: hidden;
	}
	50% {
		animation-timing-function: var(--trans-timing);
		opacity: 0;
		visibility: visible;
	}
	to {
		opacity: 1;
	}
}
@keyframes fade-slide-in {
	from {
		opacity: 0;
		transform: translateY(20%);
	}
	to {
		opacity: 1;
		transform: translateY(0);
	}
}