:root {
	--hue: 160;
	--text: #1d2330;
	--muted: #5f6878;
	--border: #e4e7ee;
	--surface: #ffffff;
	--bg: #f6f7fb;
	--radius: 14px;
}

* {
	box-sizing: border-box;
}

body {
	--accent: hsl(var(--hue) 62% 38%);
	--accent-soft: hsl(var(--hue) 70% 95%);
	margin: 0;
	font-family: Inter, "Segoe UI", system-ui, -apple-system, sans-serif;
	color: var(--text);
	background: var(--bg);
	line-height: 1.65;
}

a {
	color: var(--accent);
	text-decoration: none;
}

a:hover {
	text-decoration: underline;
}

.container {
	max-width: 1080px;
	margin: 0 auto;
	padding: 0 24px;
}

.site-header {
	position: sticky;
	top: 0;
	z-index: 10;
	background: rgb(255 255 255 / 0.85);
	backdrop-filter: blur(10px);
	border-bottom: 1px solid var(--border);
}

.header-row {
	display: flex;
	align-items: center;
	justify-content: space-between;
	gap: 24px;
	min-height: 64px;
	flex-wrap: wrap;
}

.logo {
	display: flex;
	align-items: center;
	gap: 10px;
	font-weight: 700;
	font-size: 18px;
	color: var(--text);
}

.logo-mark {
	width: 26px;
	height: 26px;
	border-radius: 8px;
	background: linear-gradient(135deg, var(--accent), hsl(calc(var(--hue) + 60) 70% 55%));
}

.main-nav {
	display: flex;
	flex-wrap: wrap;
	gap: 4px;
}

.main-nav a {
	padding: 6px 12px;
	border-radius: 999px;
	color: var(--muted);
	font-size: 14px;
}

.main-nav a:hover {
	background: var(--accent-soft);
	color: var(--accent);
	text-decoration: none;
}

main.container {
	padding-top: 32px;
	padding-bottom: 64px;
	min-height: calc(100vh - 150px);
}

.crumbs {
	font-size: 14px;
	color: var(--muted);
	margin-bottom: 20px;
}

.crumbs .sep {
	margin: 0 8px;
	opacity: 0.5;
}

.hero {
	padding: 56px 40px;
	border-radius: 24px;
	color: #fff;
	background:
		radial-gradient(circle at 85% 20%, hsl(calc(var(--hue) + 60) 80% 70% / 0.45), transparent 45%),
		linear-gradient(135deg, var(--accent), hsl(calc(var(--hue) + 40) 55% 30%));
	margin-bottom: 32px;
}

.hero h1 {
	margin: 0 0 12px;
	font-size: clamp(32px, 5vw, 48px);
	line-height: 1.1;
}

.hero p {
	margin: 0;
	max-width: 620px;
	font-size: 18px;
	opacity: 0.92;
}

.hero a {
	color: #fff;
	text-decoration: underline;
}

.grid {
	display: grid;
	grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
	gap: 16px;
}

.card {
	--accent: hsl(var(--hue) 62% 38%);
	display: block;
	padding: 22px;
	border-radius: var(--radius);
	background: var(--surface);
	border: 1px solid var(--border);
	border-top: 4px solid var(--accent);
	color: var(--text);
	transition: transform 0.15s, box-shadow 0.15s;
}

.card:hover {
	transform: translateY(-2px);
	box-shadow: 0 12px 28px rgb(20 30 60 / 0.08);
	text-decoration: none;
}

.card h3 {
	margin: 10px 0 4px;
	font-size: 20px;
}

.card p {
	margin: 0;
	color: var(--muted);
	font-size: 14px;
}

.card-tag {
	display: inline-block;
	padding: 2px 10px;
	border-radius: 999px;
	font-size: 12px;
	font-weight: 600;
	color: hsl(var(--hue) 62% 32%);
	background: hsl(var(--hue) 70% 94%);
}

.page-head {
	padding: 28px 32px;
	border-radius: var(--radius);
	background: linear-gradient(135deg, var(--accent-soft), var(--surface));
	border: 1px solid var(--border);
	margin-bottom: 24px;
}

.page-head h1 {
	margin: 0 0 4px;
	color: var(--accent);
}

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

.list {
	list-style: none;
	margin: 0;
	padding: 0;
	background: var(--surface);
	border: 1px solid var(--border);
	border-radius: var(--radius);
	overflow: hidden;
}

.list li {
	display: flex;
	align-items: center;
	justify-content: space-between;
	gap: 16px;
	padding: 14px 20px;
	border-top: 1px solid var(--border);
}

.list li:first-child {
	border-top: 0;
}

.list li.is-folder a::before {
	content: "▸ ";
	color: var(--muted);
}

.list .meta,
.empty {
	color: var(--muted);
	font-size: 13px;
	white-space: nowrap;
}

.pager {
	display: flex;
	flex-wrap: wrap;
	gap: 6px;
	margin-top: 20px;
}

.pager a,
.pager .current {
	min-width: 36px;
	padding: 6px 10px;
	text-align: center;
	border-radius: 10px;
	border: 1px solid var(--border);
	background: var(--surface);
}

.pager .current {
	background: var(--accent);
	border-color: var(--accent);
	color: #fff;
}

.article {
	padding: 40px 48px;
	border-radius: var(--radius);
	background: var(--surface);
	border: 1px solid var(--border);
	max-width: 780px;
}

.article h1 {
	margin-top: 0;
	font-size: 36px;
	line-height: 1.2;
}

.article h2 {
	margin-top: 32px;
	color: var(--accent);
	font-size: 22px;
}

.related {
	max-width: 780px;
	margin-top: 20px;
	padding: 20px 28px;
	border-radius: var(--radius);
	background: var(--accent-soft);
}

.related h2 {
	margin: 0 0 8px;
	font-size: 16px;
	text-transform: uppercase;
	letter-spacing: 0.06em;
	color: var(--accent);
}

.related ul {
	margin: 0;
	padding-left: 18px;
}

.siblings {
	max-width: 780px;
	display: flex;
	justify-content: space-between;
	gap: 16px;
	margin-top: 24px;
	font-weight: 600;
}

.site-footer {
	padding: 28px 0;
	border-top: 1px solid var(--border);
	color: var(--muted);
	font-size: 14px;
	background: var(--surface);
}

@media (max-width: 640px) {
	.hero,
	.article {
		padding: 28px 22px;
	}
}