/* Material 3 (baseline purple) tokens */
:root {
	--md-primary: #6750a4;
	--md-on-primary: #ffffff;
	--md-primary-container: #eaddff;
	--md-on-primary-container: #21005d;
	--md-secondary: #625b71;
	--md-on-secondary: #ffffff;
	--md-secondary-container: #e8def8;
	--md-on-secondary-container: #1d192b;
	--md-tertiary: #7d5260;
	--md-tertiary-container: #ffd8e4;
	--md-on-tertiary-container: #31111d;
	--md-surface: #fffbfe;
	--md-on-surface: #1c1b1f;
	--md-surface-container-lowest: #ffffff;
	--md-surface-container-low: #f7f2fa;
	--md-surface-container: #f3edf7;
	--md-surface-container-high: #ece6f0;
	--md-surface-variant: #e7e0ec;
	--md-on-surface-variant: #49454f;
	--md-outline: #79747e;
	--md-outline-variant: #cac4d0;
	--md-error: #b3261e;
	--md-error-container: #f9dedc;
	--md-on-error-container: #410e0b;
	--md-shadow: 0 1px 3px rgba(0, 0, 0, 0.12), 0 1px 2px rgba(0, 0, 0, 0.08);
	color-scheme: light;
}

@media (prefers-color-scheme: dark) {
	:root {
		--md-primary: #d0bcff;
		--md-on-primary: #381e72;
		--md-primary-container: #4f378b;
		--md-on-primary-container: #eaddff;
		--md-secondary: #ccc2dc;
		--md-on-secondary: #332d41;
		--md-secondary-container: #4a4458;
		--md-on-secondary-container: #e8def8;
		--md-tertiary: #efb8c8;
		--md-tertiary-container: #633b48;
		--md-on-tertiary-container: #ffd8e4;
		--md-surface: #1c1b1f;
		--md-on-surface: #e6e1e5;
		--md-surface-container-lowest: #0f0d13;
		--md-surface-container-low: #1d1b20;
		--md-surface-container: #211f26;
		--md-surface-container-high: #2b2930;
		--md-surface-variant: #49454f;
		--md-on-surface-variant: #cac4d0;
		--md-outline: #938f99;
		--md-outline-variant: #49454f;
		--md-error: #f2b8b5;
		--md-error-container: #8c1d18;
		--md-on-error-container: #f9dedc;
		--md-shadow: 0 1px 3px rgba(0, 0, 0, 0.4), 0 1px 2px rgba(0, 0, 0, 0.3);
		color-scheme: dark;
	}
}

* {
	box-sizing: border-box;
}

body {
	margin: 0;
	font-family: "Roboto", "Noto Sans KR", system-ui, -apple-system, sans-serif;
	background: var(--md-surface);
	color: var(--md-on-surface);
	line-height: 1.5;
}

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

.top-app-bar {
	display: flex;
	align-items: center;
	justify-content: space-between;
	gap: 16px;
	padding: 16px max(16px, calc((100% - 900px) / 2));
	background: var(--md-surface-container);
	border-bottom: 1px solid var(--md-outline-variant);
	position: sticky;
	top: 0;
	z-index: 10;
}

.top-app-bar .brand {
	display: flex;
	align-items: center;
	gap: 10px;
	font-size: 1.15rem;
	font-weight: 500;
	color: var(--md-on-surface);
	text-decoration: none;
}

.top-app-bar .brand .logo-mark {
	width: 32px;
	height: 32px;
	border-radius: 10px;
	background: var(--md-primary);
	color: var(--md-on-primary);
	display: flex;
	align-items: center;
	justify-content: center;
	font-weight: 700;
	font-size: 1rem;
	flex-shrink: 0;
}

.top-app-bar nav {
	display: flex;
	gap: 4px;
	flex-wrap: wrap;
}

.top-app-bar nav a {
	padding: 8px 16px;
	border-radius: 20px;
	text-decoration: none;
	color: var(--md-on-surface-variant);
	font-size: 0.9rem;
	font-weight: 500;
	transition: background-color 0.15s ease;
}

.top-app-bar nav a:hover {
	background: var(--md-surface-container-high);
}

.top-app-bar nav a.active {
	background: var(--md-secondary-container);
	color: var(--md-on-secondary-container);
}

main {
	max-width: 900px;
	margin: 0 auto;
	padding: 40px 24px 80px;
}

.hero {
	padding: 40px 0 24px;
}

.hero .eyebrow {
	display: inline-block;
	padding: 6px 14px;
	border-radius: 20px;
	background: var(--md-tertiary-container);
	color: var(--md-on-tertiary-container);
	font-size: 0.8rem;
	font-weight: 600;
	letter-spacing: 0.02em;
	margin-bottom: 16px;
}

h1 {
	font-size: 2.5rem;
	line-height: 1.15;
	font-weight: 400;
	margin: 0 0 16px;
	letter-spacing: -0.01em;
}

h2 {
	font-size: 1.5rem;
	font-weight: 500;
	margin: 0 0 12px;
}

h3 {
	font-size: 1.15rem;
	font-weight: 500;
	margin: 0 0 8px;
}

.subtitle {
	font-size: 1.1rem;
	color: var(--md-on-surface-variant);
	max-width: 640px;
	margin: 0 0 28px;
}

.button-row {
	display: flex;
	gap: 12px;
	flex-wrap: wrap;
}

.btn {
	display: inline-flex;
	align-items: center;
	gap: 8px;
	padding: 10px 24px;
	border-radius: 20px;
	font-size: 0.95rem;
	font-weight: 500;
	text-decoration: none;
	border: none;
	cursor: pointer;
	transition: box-shadow 0.15s ease, background-color 0.15s ease;
}

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

.btn-filled:hover {
	box-shadow: var(--md-shadow);
}

.btn-tonal {
	background: var(--md-secondary-container);
	color: var(--md-on-secondary-container);
}

.btn-tonal:hover {
	box-shadow: var(--md-shadow);
}

.btn-outlined {
	background: transparent;
	color: var(--md-primary);
	border: 1px solid var(--md-outline);
}

section {
	margin: 56px 0;
}

.card-grid {
	display: grid;
	grid-template-columns: repeat(auto-fit, minmax(340px, 1fr));
	gap: 20px;
}

.card {
	background: var(--md-surface-container-low);
	border: 1px solid var(--md-outline-variant);
	border-radius: 24px;
	padding: 28px;
}

.card .icon-mark {
	width: 48px;
	height: 48px;
	border-radius: 14px;
	background: var(--md-primary-container);
	color: var(--md-on-primary-container);
	display: flex;
	align-items: center;
	justify-content: center;
	font-size: 1.4rem;
	margin-bottom: 16px;
}

.card p {
	color: var(--md-on-surface-variant);
	margin: 0 0 18px;
}

.chip-row {
	display: flex;
	flex-wrap: wrap;
	gap: 8px;
	margin: 0 0 18px;
}

.chip {
	display: inline-flex;
	align-items: center;
	padding: 6px 14px;
	border-radius: 16px;
	background: var(--md-surface-container-high);
	color: var(--md-on-surface-variant);
	font-size: 0.8rem;
	border: 1px solid var(--md-outline-variant);
}

.card .card-links {
	display: flex;
	gap: 10px;
	flex-wrap: wrap;
}

.card .card-links a {
	font-size: 0.9rem;
	font-weight: 500;
	text-decoration: none;
	padding: 8px 16px;
	border-radius: 18px;
	background: var(--md-surface-container-high);
	color: var(--md-on-surface);
}

.card .card-links a:hover {
	background: var(--md-surface-variant);
}

.info-panel {
	background: var(--md-surface-container);
	border-radius: 24px;
	padding: 28px 32px;
}

.info-panel + .info-panel {
	margin-top: 16px;
}

.info-panel ul {
	margin: 0;
	padding-left: 20px;
}

.info-panel li {
	margin-bottom: 8px;
}

.callout {
	border-radius: 20px;
	padding: 20px 24px;
	background: var(--md-tertiary-container);
	color: var(--md-on-tertiary-container);
	font-size: 0.95rem;
}

.callout.error {
	background: var(--md-error-container);
	color: var(--md-on-error-container);
}

footer {
	max-width: 900px;
	margin: 0 auto;
	padding: 24px 24px 60px;
	color: var(--md-on-surface-variant);
	font-size: 0.85rem;
	display: flex;
	justify-content: space-between;
	flex-wrap: wrap;
	gap: 12px;
	border-top: 1px solid var(--md-outline-variant);
}

footer a {
	color: var(--md-on-surface-variant);
	margin-right: 16px;
	text-decoration: none;
}

footer a:hover {
	text-decoration: underline;
}

.legal h2 {
	margin-top: 40px;
}

.legal h2:first-of-type {
	margin-top: 0;
}

.legal p,
.legal li {
	color: var(--md-on-surface-variant);
}

.legal .updated {
	color: var(--md-on-surface-variant);
	font-size: 0.9rem;
	margin-bottom: 32px;
}

table.scope-table {
	width: 100%;
	border-collapse: collapse;
	margin: 16px 0;
}

table.scope-table th,
table.scope-table td {
	text-align: left;
	padding: 10px 12px;
	border-bottom: 1px solid var(--md-outline-variant);
	font-size: 0.9rem;
	vertical-align: top;
}

table.scope-table th {
	color: var(--md-on-surface-variant);
	font-weight: 500;
}

code {
	background: var(--md-surface-container-high);
	padding: 2px 6px;
	border-radius: 6px;
	font-size: 0.85em;
}

@media (max-width: 600px) {
	h1 {
		font-size: 2rem;
	}
	.top-app-bar {
		flex-direction: column;
		align-items: flex-start;
	}
}