:root {
	color-scheme: dark;
	--bg: #050505;
	--text: #b8bab7;
	--muted: #626560;
	--faint: #292b29;
	--signal: #b32b2b;
}

* {
	box-sizing: border-box;
}

html {
	background: var(--bg);
}

body {
	min-width: 280px;
	min-height: 100vh;
	margin: 0;
	color: var(--text);
	background: var(--bg);
	font-family: 'Fragment Mono', ui-monospace, SFMono-Regular, Consolas, monospace;
	font-size: 12px;
	line-height: 1.5;
}

body::after {
	position: fixed;
	z-index: 3;
	inset: 0;
	pointer-events: none;
	content: '';
	opacity: 0.045;
	background-image: repeating-radial-gradient(circle at 17% 31%, transparent 0 1px, #fff 1px 1.4px, transparent 1.4px 4px);
	background-size: 7px 9px;
	animation: grain 12s steps(2, end) infinite;
}

.landscape {
	position: fixed;
	z-index: 0;
	inset: 24% 0 0;
	pointer-events: none;
	background: url('./assets/landscape.webp') center bottom / cover no-repeat;
	opacity: 0.64;
	filter: contrast(1.08) brightness(0.9);
	-webkit-mask-image: linear-gradient(to bottom, transparent 0, #000 48%);
	mask-image: linear-gradient(to bottom, transparent 0, #000 48%);
}

.rain {
	position: fixed;
	z-index: 1;
	inset: 0;
	overflow: hidden;
	pointer-events: none;
}

.rain::before,
.rain::after {
	position: absolute;
	top: -30vh;
	left: 3vw;
	width: 1px;
	height: 42px;
	content: '';
	background: linear-gradient(to bottom, transparent, rgb(190 195 193 / 25%));
	box-shadow:
		8vw 45vh rgb(190 195 193 / 18%),
		17vw 12vh rgb(190 195 193 / 20%),
		28vw 76vh rgb(190 195 193 / 16%),
		39vw 28vh rgb(190 195 193 / 21%),
		50vw 92vh rgb(190 195 193 / 17%),
		61vw 7vh rgb(190 195 193 / 19%),
		72vw 58vh rgb(190 195 193 / 22%),
		83vw 19vh rgb(190 195 193 / 16%),
		94vw 84vh rgb(190 195 193 / 20%);
	animation: rain-fall 2.4s linear infinite;
}

.rain::after {
	left: 9vw;
	height: 27px;
	opacity: 0.65;
	box-shadow:
		6vw 75vh rgb(190 195 193 / 17%),
		14vw 23vh rgb(190 195 193 / 20%),
		25vw 98vh rgb(190 195 193 / 18%),
		36vw 44vh rgb(190 195 193 / 16%),
		47vw 4vh rgb(190 195 193 / 19%),
		58vw 68vh rgb(190 195 193 / 21%),
		69vw 34vh rgb(190 195 193 / 17%),
		80vw 89vh rgb(190 195 193 / 19%),
		91vw 51vh rgb(190 195 193 / 16%);
	animation-duration: 1.7s;
	animation-delay: -0.8s;
}

.icon-sprite {
	position: absolute;
	width: 0;
	height: 0;
	overflow: hidden;
}

.page {
	position: relative;
	z-index: 1;
	display: flex;
	width: min(100% - 40px, 680px);
	min-height: 100svh;
	margin-inline: auto;
	padding: 34px 0 28px;
	flex-direction: column;
}

.topline {
	display: flex;
	align-items: center;
	justify-content: space-between;
	gap: 24px;
	color: var(--muted);
	font-size: 10px;
	letter-spacing: 0.12em;
}

.topline {
	padding-bottom: 11px;
	border-bottom: 1px solid var(--faint);
}

.clock {
	flex: none;
	color: var(--text);
}

.identity {
	margin-top: 22px;
}

h1 {
	margin: 0;
	color: #b8bab7;
	font-size: 12px;
	font-weight: 400;
	letter-spacing: 0.55em;
	line-height: 1;
	text-indent: 0.55em;
}

.lyric {
	min-width: 0;
	min-height: 1.5em;
	margin: 0;
	color: #858883;
	overflow: hidden;
	white-space: nowrap;
}

.lyric::after {
	content: '_';
	color: var(--signal);
	animation: cursor 1.1s steps(1, end) infinite;
}

.signal {
	position: relative;
	width: min(62vw, 270px);
	margin: 0 auto 2px;
	color: #666964;
}

.signal-label {
	position: absolute;
	z-index: 1;
	top: 17.5%;
	left: 50%;
	padding: 0 11px;
	background: var(--bg);
	transform: translate(-50%, -50%);
}

.signal svg {
	display: block;
	width: 100%;
	overflow: visible;
}

.sensor-ring,
.sensor-grid,
.heartbeat {
	fill: none;
	stroke: currentColor;
	vector-effect: non-scaling-stroke;
}

.sensor-ring {
	stroke-dasharray: 2 4;
	stroke-width: 1;
	opacity: 0.65;
}

.sensor-grid {
	stroke-dasharray: 4 8;
	stroke-width: 0.75;
	opacity: 0.18;
}

.heartbeat {
	stroke-linecap: round;
	stroke-linejoin: round;
}

.heartbeat-base {
	stroke-width: 1;
	opacity: 0.32;
}

.heartbeat-pulse {
	stroke: #c7c9c5;
	stroke-dasharray: 0.16 0.84;
	stroke-width: 1.4;
	filter: drop-shadow(0 0 3px rgb(199 201 197 / 35%));
	animation:
		heartbeat-scan 2.6s linear infinite,
		heartbeat-glow 1.3s ease-in-out infinite;
}

.heartbeat-dot {
	fill: var(--signal);
	filter: drop-shadow(0 0 5px rgb(179 43 43 / 55%));
	transform-box: fill-box;
	transform-origin: center;
	animation: heartbeat-beat 1.3s ease-in-out infinite;
}

.links {
	margin: 0;
	padding: 0;
	list-style: none;
}

.links li + li {
	border-top: 1px solid rgb(98 101 96 / 15%);
}

.links a {
	display: grid;
	min-height: 35px;
	align-items: center;
	grid-template-columns: 45px 16px minmax(92px, auto) 1fr;
	gap: 11px;
	color: var(--text);
	text-decoration: none;
	outline: 0;
}

.links .index {
	color: var(--muted);
	font-size: 10px;
	transition: color 160ms ease;
}

.links svg {
	width: 14px;
	height: 14px;
	fill: currentColor;
	opacity: 0.66;
	transition:
		color 160ms ease,
		opacity 160ms ease;
}

.links .label {
	letter-spacing: 0.02em;
	transition:
		color 160ms ease,
		transform 160ms ease;
}

.links .line {
	height: 1px;
	background: var(--faint);
	transform-origin: left;
	transition:
		background-color 160ms ease,
		transform 160ms ease;
}

.links a:is(:hover, :focus-visible) :is(.index, svg, .label) {
	color: var(--brand);
}

.links a:is(:hover, :focus-visible) svg {
	opacity: 1;
}

.links a:is(:hover, :focus-visible) .label {
	transform: translateX(3px);
}

.links a:is(:hover, :focus-visible) .line {
	background: var(--brand);
	transform: scaleX(0.96);
}

.links a:focus-visible {
	box-shadow: inset 2px 0 var(--brand);
}

@keyframes rain-fall {
	from {
		transform: translate3d(0, -30vh, 0) rotate(4deg);
	}

	to {
		transform: translate3d(0, 160vh, 0) rotate(4deg);
	}
}

@keyframes heartbeat-scan {
	to {
		stroke-dashoffset: -1;
	}
}

@keyframes heartbeat-glow {
	50% {
		opacity: 0.45;
	}
}

@keyframes heartbeat-beat {
	45%,
	55% {
		opacity: 1;
		transform: scale(1.7);
	}
}

@keyframes cursor {
	50% {
		opacity: 0;
	}
}

@keyframes grain {
	50% {
		transform: translate3d(1px, -1px, 0);
	}
}

@media (max-width: 520px) {
	.page {
		width: min(100% - 28px, 680px);
		padding-top: 22px;
	}

	.identity {
		margin-top: 18px;
	}

	.signal {
		width: min(66vw, 225px);
	}

	.links a {
		grid-template-columns: 38px 15px minmax(82px, auto) 1fr;
		gap: 8px;
	}

	.landscape {
		top: 38%;
		background-position: 62% bottom;
	}
}