:root {
	--bg: #ffffff;
	--bg-soft: #f3f6fa;
	--text: #14202b;
	--muted: #475667;
	--line: #d6dee7;
	--primary: #0b5d91;
	--primary-hover: #094b75;
	--on-primary: #ffffff;
	--accent-soft: #e3eff8;
	--warn-bg: #fff5dc;
	--warn-line: #c98a00;
	--warn-text: #55390a;
	--shadow: 0 1px 2px rgb(20 32 43 / 0.06), 0 12px 32px rgb(20 32 43 / 0.1);
	color-scheme: light dark;
}

@media (prefers-color-scheme: dark) {
	:root {
		--bg: #0e151c;
		--bg-soft: #141e27;
		--text: #e6edf3;
		--muted: #a2b3c2;
		--line: #26343f;
		--primary: #62b4e8;
		--primary-hover: #8cc9f0;
		--on-primary: #08202f;
		--accent-soft: #15303f;
		--warn-bg: #2a2210;
		--warn-line: #d9a21b;
		--warn-text: #f0d9a0;
		--shadow: 0 1px 2px rgb(0 0 0 / 0.4), 0 12px 32px rgb(0 0 0 / 0.45);
	}
}

* {
	box-sizing: border-box;
}

html {
	scroll-behavior: smooth;
	-webkit-text-size-adjust: 100%;
}

@media (prefers-reduced-motion: reduce) {
	html {
		scroll-behavior: auto;
	}
}

body {
	margin: 0;
	background: var(--bg);
	color: var(--text);
	font: 1rem/1.6 system-ui, -apple-system, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
}

a {
	color: var(--primary);
	text-underline-offset: 0.18em;
}

a:hover {
	color: var(--primary-hover);
}

:focus-visible {
	outline: 3px solid var(--primary);
	outline-offset: 2px;
	border-radius: 4px;
}

.wrap {
	width: min(68rem, 100% - 2rem);
	margin-inline: auto;
}

.skip {
	position: absolute;
	left: 1rem;
	top: -4rem;
	padding: 0.5rem 0.9rem;
	background: var(--primary);
	color: var(--on-primary);
	border-radius: 6px;
	z-index: 10;
}

.skip:focus {
	top: 1rem;
}

/* Header */
.site-header {
	display: flex;
	align-items: center;
	justify-content: space-between;
	gap: 1rem;
	padding-block: 1rem;
}

.brand {
	display: inline-flex;
	align-items: center;
	gap: 0.6rem;
	color: var(--text);
	font-weight: 700;
	font-size: 1.15rem;
	text-decoration: none;
}

.brand:hover {
	color: var(--text);
}

.brand img {
	width: 1.9rem;
	height: 1.9rem;
}

.site-nav {
	display: flex;
	flex-wrap: wrap;
	gap: 0.25rem 1.25rem;
	font-size: 0.95rem;
}

.site-nav a {
	color: var(--muted);
	text-decoration: none;
	padding-block: 0.25rem;
}

.site-nav a:hover {
	color: var(--text);
	text-decoration: underline;
}

@media (max-width: 40rem) {
	.site-nav .optional {
		display: none;
	}
}

/* Hero */
.hero {
	padding-block: 3rem 1rem;
	text-align: center;
}

.badge {
	display: inline-block;
	margin: 0 0 1rem;
	padding: 0.2rem 0.75rem;
	border: 1px solid var(--warn-line);
	border-radius: 999px;
	background: var(--warn-bg);
	color: var(--warn-text);
	font-size: 0.85rem;
	font-weight: 600;
	letter-spacing: 0.02em;
}

h1 {
	margin: 0 auto 1rem;
	max-width: 18ch;
	font-size: clamp(2.2rem, 5.5vw, 3.6rem);
	line-height: 1.1;
	letter-spacing: -0.025em;
	text-wrap: balance;
}

.lead {
	margin: 0 auto 1.75rem;
	max-width: 40rem;
	color: var(--muted);
	font-size: clamp(1.05rem, 2.2vw, 1.25rem);
	text-wrap: pretty;
}

.actions {
	display: flex;
	flex-wrap: wrap;
	justify-content: center;
	gap: 0.75rem;
}

.button {
	display: inline-block;
	padding: 0.7rem 1.3rem;
	border: 1px solid var(--primary);
	border-radius: 8px;
	background: var(--primary);
	color: var(--on-primary);
	font-weight: 600;
	text-decoration: none;
}

.button:hover {
	background: var(--primary-hover);
	border-color: var(--primary-hover);
	color: var(--on-primary);
}

.button.secondary {
	background: transparent;
	color: var(--primary);
}

.button.secondary:hover {
	background: var(--accent-soft);
	color: var(--primary-hover);
}

/* Alpha notice */
.notice {
	margin: 2.25rem auto 0;
	max-width: 46rem;
	padding: 1rem 1.25rem;
	border: 1px solid var(--warn-line);
	border-left-width: 6px;
	border-radius: 8px;
	background: var(--warn-bg);
	color: var(--warn-text);
	text-align: left;
}

.notice p {
	margin: 0;
}

.notice a {
	color: inherit;
}

/* Screenshot in a window frame */
.shot {
	margin: 2.5rem auto 0;
	max-width: 64rem;
}

.frame {
	overflow: hidden;
	border: 1px solid var(--line);
	border-radius: 12px;
	background: var(--bg-soft);
	box-shadow: var(--shadow);
}

.frame .bar {
	display: flex;
	gap: 0.4rem;
	padding: 0.65rem 0.9rem;
	border-bottom: 1px solid var(--line);
}

.frame .bar i {
	width: 0.65rem;
	height: 0.65rem;
	border-radius: 50%;
	background: var(--line);
}

.frame img {
	display: block;
	width: 100%;
	height: auto;
}

figcaption {
	margin-top: 0.75rem;
	color: var(--muted);
	font-size: 0.9rem;
	text-align: center;
}

/* Sections */
section {
	padding-block: 3.5rem;
}

section.soft {
	background: var(--bg-soft);
	border-block: 1px solid var(--line);
}

h2 {
	margin: 0 0 0.5rem;
	font-size: clamp(1.6rem, 3.4vw, 2.1rem);
	line-height: 1.2;
	letter-spacing: -0.015em;
	text-wrap: balance;
}

.section-lead {
	margin: 0 0 2rem;
	max-width: 42rem;
	color: var(--muted);
}

h3 {
	margin: 0 0 0.4rem;
	font-size: 1.1rem;
	line-height: 1.3;
}

/* How it works */
.flow {
	display: grid;
	grid-template-columns: 1fr auto 1fr;
	align-items: stretch;
	gap: 1rem;
}

.flow .node {
	padding: 1.25rem 1.4rem;
	border: 1px solid var(--line);
	border-radius: 12px;
	background: var(--bg);
}

.flow .node h3 {
	font-size: 1.2rem;
}

.flow .node ul {
	margin: 0.6rem 0 0;
	padding-left: 1.2rem;
	color: var(--muted);
}

.flow .link {
	display: flex;
	flex-direction: column;
	align-items: center;
	justify-content: center;
	gap: 0.35rem;
	min-width: 7.5rem;
	color: var(--muted);
	font-size: 0.85rem;
	text-align: center;
}

.flow .link svg {
	width: 3.2rem;
	height: 1.2rem;
	color: var(--primary);
}

.flow .secret {
	border-color: var(--primary);
	box-shadow: inset 0 0 0 1px var(--primary);
}

@media (max-width: 48rem) {
	.flow {
		grid-template-columns: 1fr;
	}

	.flow .link svg {
		transform: rotate(90deg);
		margin-block: 0.8rem;
	}
}

.note {
	margin: 1.5rem 0 0;
	color: var(--muted);
}

/* Grids */
.grid {
	display: grid;
	grid-template-columns: repeat(auto-fit, minmax(14.5rem, 1fr));
	gap: 1rem;
}

.card {
	padding: 1.25rem 1.3rem;
	border: 1px solid var(--line);
	border-top: 3px solid var(--primary);
	border-radius: 10px;
	background: var(--bg);
}

.card p {
	margin: 0;
	color: var(--muted);
}

.two {
	display: grid;
	grid-template-columns: repeat(auto-fit, minmax(19rem, 1fr));
	gap: 2rem;
}

.two ul {
	margin: 0.5rem 0 0;
	padding-left: 1.2rem;
}

.two li {
	margin-bottom: 0.45rem;
}

.two li span {
	color: var(--muted);
}

/* Gallery */
.gallery {
	display: grid;
	grid-template-columns: repeat(auto-fit, minmax(18rem, 1fr));
	gap: 1.5rem;
	margin: 0;
}

.gallery figure {
	margin: 0;
}

/* Install */
pre {
	margin: 1rem 0;
	padding: 1rem 1.2rem;
	overflow-x: auto;
	border: 1px solid var(--line);
	border-radius: 10px;
	background: var(--bg-soft);
	font: 0.9rem/1.6 ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
}

code {
	font: 0.92em ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
}

/* Footer */
.site-footer {
	padding-block: 2.5rem 3rem;
	border-top: 1px solid var(--line);
	color: var(--muted);
	font-size: 0.92rem;
}

.site-footer ul {
	display: flex;
	flex-wrap: wrap;
	gap: 0.4rem 1.4rem;
	margin: 0 0 1rem;
	padding: 0;
	list-style: none;
}

.site-footer p {
	margin: 0 0 0.5rem;
	max-width: 46rem;
}