:root {
	--ink: #10141c;
	--paper: #ffffff;
	--text: #1a1610;
	--muted: #5e574c;
	--highlight: #2362b3;
	--on-highlight: #f4efe6;
	--line: #d9d3c8;
	--well: #f4efe6;
	--font: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
	--safe-top: env(safe-area-inset-top, 0px);
	--safe-right: env(safe-area-inset-right, 0px);
	--safe-bottom: env(safe-area-inset-bottom, 0px);
	--safe-left: env(safe-area-inset-left, 0px);
}

* {
	box-sizing: border-box;
}

html,
body {
	margin: 0;
	padding: 0;
	min-height: 100%;
}

body {
	font-family: var(--font);
	font-size: 1rem;
	line-height: 1.5;
	color: var(--text);
	background: var(--paper);
}

a {
	color: var(--highlight);
}

img {
	display: block;
	max-width: 100%;
	height: auto;
}

.site-header,
.site-footer,
main {
	width: min(40rem, 100%);
	margin: 0 auto;
	padding-left: max(1.25rem, var(--safe-left));
	padding-right: max(1.25rem, var(--safe-right));
}

.site-header {
	display: flex;
	flex-wrap: wrap;
	align-items: center;
	justify-content: space-between;
	gap: 0.75rem 1.25rem;
	padding-top: max(1rem, var(--safe-top));
	padding-bottom: 1rem;
	border-bottom: 1px solid var(--line);
}

.brand {
	display: flex;
	align-items: center;
	gap: 0.6rem;
	color: var(--ink);
	text-decoration: none;
	font-weight: 700;
	letter-spacing: 0.02em;
	min-height: 44px;
}

.brand img {
	width: 40px;
	height: 40px;
}

nav {
	display: flex;
	flex-wrap: wrap;
	gap: 0.25rem;
}

nav a {
	display: inline-flex;
	align-items: center;
	min-height: 44px;
	padding: 0 0.7rem;
	text-decoration: none;
	font-weight: 600;
}

.site-footer {
	padding-top: 2rem;
	padding-bottom: max(1.5rem, var(--safe-bottom));
	color: var(--muted);
	font-size: 0.92rem;
}

.site-footer p {
	margin: 0;
}

.hero {
	padding: 2.25rem 0 1.5rem;
}

.hero img {
	width: 112px;
	height: 112px;
	margin-bottom: 1rem;
}

h1 {
	margin: 0 0 0.5rem;
	font-size: 1.85rem;
	line-height: 1.2;
}

.lede {
	margin: 0 0 1.25rem;
	color: var(--muted);
	font-size: 1.05rem;
}

.actions {
	display: flex;
	flex-wrap: wrap;
	gap: 0.75rem;
	margin: 0 0 1.75rem;
}

.btn {
	display: inline-flex;
	align-items: center;
	justify-content: center;
	min-height: 44px;
	padding: 0.6rem 1.1rem;
	border-radius: 6px;
	text-decoration: none;
	font-weight: 650;
}

.btn-primary {
	background: var(--highlight);
	color: var(--on-highlight);
}

.btn-ghost {
	background: var(--well);
	color: var(--ink);
}

.facts {
	list-style: none;
	margin: 0;
	padding: 0;
	border-top: 1px solid var(--line);
}

.facts li {
	padding: 0.85rem 0;
	border-bottom: 1px solid var(--line);
	color: var(--muted);
}

.facts strong {
	display: block;
	color: var(--text);
	margin-bottom: 0.2rem;
}

.page {
	padding: 1.5rem 0 2rem;
}

.page h1 {
	margin-bottom: 0.75rem;
}

.page h2 {
	margin: 1.6rem 0 0.5rem;
	font-size: 1.2rem;
}

.page p,
.page li {
	color: var(--muted);
}

.page ul {
	padding-left: 1.2rem;
}

.note {
	background: var(--well);
	padding: 0.9rem 1rem;
	border-radius: 6px;
}

.guide-toc {
	display: flex;
	flex-wrap: wrap;
	gap: 0.25rem 0.15rem;
	margin: 0 0 1.5rem;
	padding-bottom: 0.75rem;
	border-bottom: 1px solid var(--line);
}

.guide-toc a {
	display: inline-flex;
	align-items: center;
	min-height: 44px;
	padding: 0 0.55rem;
	text-decoration: none;
	font-weight: 600;
}

.guide-sec {
	scroll-margin-top: 0.75rem;
	padding-top: 0.25rem;
}

.guide-sec + .guide-sec {
	margin-top: 0.5rem;
	padding-top: 1.1rem;
	border-top: 1px solid var(--line);
}

.guide-kicker {
	margin: 0 0 0.25rem;
	color: var(--muted);
	text-transform: uppercase;
	font-size: 0.92rem;
}

.guide-page h3 {
	margin: 1.1rem 0 0.4rem;
	font-size: 1.05rem;
}

.guide-fig {
	margin: 0.6rem 0 1rem;
}

.guide-fig-art {
	aspect-ratio: 16 / 9;
	border-radius: 12px;
	overflow: hidden;
	border: 1px solid var(--line);
	background: var(--well);
}

.guide-fig:not(.wide) .guide-fig-art {
	aspect-ratio: 1 / 1;
}

.guide-fig-art img {
	width: 100%;
	height: 100%;
	object-fit: contain;
	object-position: center;
}

.guide-fig figcaption {
	margin: 0.5rem 0.1rem 0;
	color: var(--muted);
	font-size: 0.95rem;
}

.guide-note {
	margin: 0.75rem 0 1rem;
	padding: 0.85rem 1rem;
	border-radius: 8px;
	border: 1px solid var(--line);
	background: var(--well);
	color: var(--text);
}

.guide-steps {
	list-style: none;
	margin: 0.5rem 0 1rem;
	padding: 0;
	display: grid;
	gap: 0.65rem;
}

.guide-steps li {
	display: grid;
	grid-template-columns: 36px 1fr;
	gap: 0.65rem;
	align-items: start;
}

.guide-step-n {
	display: grid;
	place-items: center;
	width: 36px;
	height: 36px;
	border-radius: 50%;
	background: var(--highlight);
	color: var(--on-highlight);
	font-variant-numeric: tabular-nums;
}

.guide-modes {
	display: grid;
	gap: 0.65rem;
	margin: 0.5rem 0 1rem;
}

.guide-mode {
	background: var(--well);
	border: 1px solid var(--line);
	border-radius: 8px;
	padding: 0.75rem 0.9rem;
}

.guide-mode h3 {
	margin: 0 0 0.35rem;
	font-size: 1rem;
}

.guide-mode p {
	margin: 0;
}

.guide-pair {
	display: grid;
	gap: 0.65rem;
	margin: 0.5rem 0 1rem;
}

.guide-pair .guide-fig {
	margin: 0;
}

@media (min-width: 640px) {
	.guide-modes,
	.guide-pair {
		grid-template-columns: 1fr 1fr;
	}
}

@media (min-width: 700px) {
	h1 {
		font-size: 2.15rem;
	}

	.hero {
		padding-top: 3rem;
	}
}