/*
 * 변기톤 오푸스 통계 — Global Styles
 * Dark-first, system fonts, mobile-responsive, motion-reduced friendly.
 */

:root {
	color-scheme: dark light;

	/* Palette (dark) — WCAG AA: text on bg ≥ 4.5:1, large text ≥ 3:1 */
	--bg: #0b0b14;
	--bg-elev: #14141f;
	--bg-elev-2: #1c1c2b;
	--ink: #f4f4f8;          /* on bg: 16.8:1 */
	--ink-mute: #c2c2d2;      /* on bg: 10.4:1 (was a3a3b8 = 7.3:1) */
	--ink-fade: #9a9aae;     /* on bg: 6.4:1 (was 5a5a72 = 3.0:1 — failed) */
	--accent: #2dd4bf;       /* teal — on bg: 8.2:1 (was 14b8a6 = 5.4:1) */
	--accent-hot: #f472b6;   /* magenta — on bg: 6.5:1 (was ec4899 = 4.6:1) */
	--accent-gold: #fbbf24;
	--accent-soft: #a5b4fc;
	--border: #25253a;
	--border-strong: #3a3a55;

	/* Typography */
	--font-sans: "Pretendard Variable", Pretendard, -apple-system, BlinkMacSystemFont, "Apple SD Gothic Neo", "Noto Sans KR", sans-serif;
	--font-mono: "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, monospace;

	/* Geometry */
	--radius-sm: 8px;
	--radius: 14px;
	--radius-lg: 24px;
	--shadow-1: 0 1px 0 rgba(255, 255, 255, 0.04) inset, 0 8px 24px rgba(0, 0, 0, 0.5);
	--shadow-2: 0 1px 0 rgba(255, 255, 255, 0.06) inset, 0 16px 48px rgba(0, 0, 0, 0.7);

	/* Layout */
	--container: 1240px;
	--gutter: clamp(1rem, 3vw, 2rem);
}

@media (prefers-color-scheme: light) {
	:root[data-theme="dark"] {
		/* user pinned dark — keep */
	}
	:root:not([data-theme]) {
		--bg: #fafafa;
		--bg-elev: #ffffff;
		--bg-elev-2: #f4f4f8;
		--ink: #0b0b14;
		--ink-mute: #4a4a5e;
		--ink-fade: #8a8aa3;
		--border: #e5e5ec;
		--border-strong: #c8c8d3;
		--shadow-1: 0 1px 0 rgba(0, 0, 0, 0.02) inset, 0 8px 24px rgba(0, 0, 0, 0.05);
		--shadow-2: 0 1px 0 rgba(0, 0, 0, 0.04) inset, 0 16px 48px rgba(0, 0, 0, 0.1);
	}
}

* {
	box-sizing: border-box;
	margin: 0;
}

html {
	font-family: var(--font-sans);
	font-size: 16px;
	-webkit-text-size-adjust: 100%;
	-webkit-tap-highlight-color: transparent;
}

body {
	background: var(--bg);
	color: var(--ink);
	line-height: 1.55;
	letter-spacing: -0.01em;
	min-height: 100dvh;
	overflow-x: hidden;
}

@media (prefers-reduced-motion: no-preference) {
	html { scroll-behavior: smooth; }
}

a {
	color: inherit;
	text-decoration: none;
	transition: color 0.15s ease;
}

a:hover, a:focus-visible {
	color: var(--accent);
}

a:focus-visible, button:focus-visible {
	outline: 2px solid var(--accent);
	outline-offset: 3px;
	border-radius: 4px;
}

.skip-link {
	position: absolute;
	top: -100px;
	left: 0;
	padding: 1rem;
	background: var(--accent);
	color: #000;
	z-index: 100;
}
.skip-link:focus { top: 0; }

/* ─── Header ───────────────────────────────────────────────────────────── */

.site-header {
	position: sticky;
	top: 0;
	z-index: 10;
	display: flex;
	align-items: center;
	gap: 1.5rem;
	padding: 1rem var(--gutter);
	background: color-mix(in oklab, var(--bg) 90%, transparent);
	backdrop-filter: saturate(180%) blur(20px);
	-webkit-backdrop-filter: saturate(180%) blur(20px);
	border-bottom: 1px solid var(--border);
}

.brand {
	display: inline-flex;
	align-items: center;
	gap: 0.5rem;
	font-weight: 700;
}

.brand-mark { font-size: 1.4rem; }
.brand-name { letter-spacing: -0.03em; }

.site-nav {
	display: none;
	gap: 1.25rem;
	margin-left: auto;
	color: var(--ink-mute);
	font-size: 0.95rem;
}
.site-nav a { font-weight: 500; }

@media (min-width: 720px) {
	.site-nav { display: inline-flex; }
}

.repo-link {
	margin-left: auto;
	font-size: 0.9rem;
	color: var(--ink-mute);
	font-weight: 500;
	white-space: nowrap;
}
@media (min-width: 720px) {
	.repo-link { margin-left: 0; }
}

/* ─── Hero ─────────────────────────────────────────────────────────────── */

.hero {
	max-width: var(--container);
	margin: 0 auto;
	padding: clamp(2rem, 5vw, 4rem) var(--gutter);
	display: grid;
	gap: clamp(2rem, 4vw, 4rem);
	grid-template-columns: 1fr;
	align-items: center;
}

@media (min-width: 960px) {
	.hero { grid-template-columns: minmax(0, 1.1fr) minmax(0, 1fr); }
}

.hero-eyebrow {
	font-size: 0.85rem;
	font-weight: 600;
	text-transform: uppercase;
	letter-spacing: 0.15em;
	color: var(--accent);
}

.hero h1 {
	font-size: clamp(2rem, 5.5vw, 3.75rem);
	line-height: 1.1;
	letter-spacing: -0.04em;
	font-weight: 800;
	margin-block: 1rem 1.5rem;
	background: linear-gradient(135deg, var(--ink) 0%, var(--accent) 50%, var(--accent-hot) 100%);
	-webkit-background-clip: text;
	background-clip: text;
	-webkit-text-fill-color: transparent;
}

.hero-lede {
	font-size: clamp(1rem, 1.6vw, 1.15rem);
	color: var(--ink-mute);
	margin-block-end: 2rem;
}

.hero-lede em {
	font-style: normal;
	color: var(--ink);
	font-weight: 700;
}

.hero-actions { display: flex; flex-wrap: wrap; gap: 0.75rem; margin-block-end: 2.5rem; }

.hero-kpi {
	display: grid;
	grid-template-columns: repeat(2, minmax(0, 1fr));
	gap: 0.5rem;
	margin: 0;
	padding: 0;
	max-width: 720px;
}

@media (min-width: 560px) {
	.hero-kpi { grid-template-columns: repeat(4, minmax(0, 1fr)); }
}

.hero-kpi__cell {
	margin: 0;
	padding: 1rem 1.25rem;
	background: color-mix(in oklab, var(--bg-elev) 90%, transparent);
	border: 1px solid var(--border);
	border-radius: var(--radius-sm);
	backdrop-filter: blur(8px);
	-webkit-backdrop-filter: blur(8px);
}

.hero-kpi__cell--accent {
	border-color: color-mix(in oklab, var(--accent) 50%, transparent);
	box-shadow: 0 0 0 1px color-mix(in oklab, var(--accent) 30%, transparent) inset;
}

.hero-kpi dt {
	font-size: 0.75rem;
	color: var(--ink-fade);
	letter-spacing: 0.1em;
	text-transform: uppercase;
	font-weight: 600;
	margin-block-end: 0.25rem;
}

.hero-kpi dd {
	margin: 0;
	font-size: clamp(1.05rem, 1.6vw, 1.35rem);
	font-weight: 800;
	letter-spacing: -0.03em;
	color: var(--ink);
	font-variant-numeric: tabular-nums;
	overflow: hidden;
	text-overflow: ellipsis;
	white-space: nowrap;
}

.hero-kpi__cell--accent dd {
	background: linear-gradient(135deg, var(--accent) 0%, var(--accent-hot) 100%);
	-webkit-background-clip: text;
	background-clip: text;
	-webkit-text-fill-color: transparent;
}

.btn {
	display: inline-flex;
	align-items: center;
	gap: 0.5rem;
	padding: 0.85rem 1.5rem;
	border-radius: 999px;
	font-weight: 600;
	font-size: 0.95rem;
	transition: transform 0.15s ease, box-shadow 0.15s ease, background 0.15s ease;
}

.btn-primary {
	background: linear-gradient(135deg, var(--accent), var(--accent-hot));
	color: #fff;
	box-shadow: 0 8px 24px rgba(20, 184, 166, 0.3);
}

.btn-primary:hover {
	transform: translateY(-2px);
	box-shadow: 0 12px 32px rgba(20, 184, 166, 0.4);
	color: #fff;
}

.btn-secondary {
	background: var(--bg-elev);
	color: var(--ink);
	border: 1px solid var(--border-strong);
}

.btn-secondary:hover {
	background: var(--bg-elev-2);
}

.hero-image {
	display: block;
	border-radius: var(--radius-lg);
	overflow: hidden;
	aspect-ratio: 1536 / 1024;
	background: var(--bg-elev);
	box-shadow: var(--shadow-2);
}

.hero-image img {
	display: block;
	width: 100%;
	height: 100%;
	object-fit: cover;
}

/* ─── Section ──────────────────────────────────────────────────────────── */

.section {
	max-width: var(--container);
	margin: 0 auto;
	padding: clamp(2rem, 4vw, 4rem) var(--gutter);
	border-top: 1px solid var(--border);
}

.section-kicker {
	display: inline-block;
	font-size: 0.85rem;
	font-weight: 700;
	letter-spacing: 0.18em;
	color: var(--accent);
	margin-block-end: 0.75rem;
	font-family: var(--font-mono);
}
.section-kicker::after {
	content: "";
	display: inline-block;
	width: 32px;
	height: 1px;
	background: var(--accent);
	vertical-align: middle;
	margin-inline-start: 0.75rem;
	opacity: 0.6;
}

.section-title {
	font-size: clamp(1.75rem, 3.5vw, 2.5rem);
	font-weight: 800;
	letter-spacing: -0.03em;
	margin-block: 0 0.5rem;
	line-height: 1.1;
}

.section-lede {
	color: var(--ink-mute);
	margin-block-end: 2rem;
	font-size: clamp(0.95rem, 1.2vw, 1.05rem);
	max-width: 60ch;
}

/* ─── Stats Grid ───────────────────────────────────────────────────────── */

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

.stat-card { min-width: 0; }

.stat-card {
	background: var(--bg-elev);
	border: 1px solid var(--border);
	border-radius: var(--radius);
	padding: 1.5rem;
	box-shadow: var(--shadow-1);
	transition: transform 0.2s ease, border-color 0.2s ease;
}

@media (prefers-reduced-motion: no-preference) {
	.stat-card:hover { transform: translateY(-4px); border-color: var(--border-strong); }
}

.stat-label {
	font-size: 0.85rem;
	color: var(--ink-mute);
	text-transform: uppercase;
	letter-spacing: 0.1em;
	font-weight: 600;
}

.stat-value {
	font-size: clamp(1.4rem, 2.2vw, 1.85rem);
	font-weight: 800;
	letter-spacing: -0.03em;
	margin-block-start: 0.5rem;
	font-variant-numeric: tabular-nums;
	overflow: hidden;
	text-overflow: ellipsis;
	white-space: nowrap;
	min-width: 0;
}

.stat-hint {
	font-size: 0.85rem;
	color: var(--ink-fade);
	margin-block-start: 0.5rem;
}

.stat-loading {
	color: var(--ink-fade);
	font-size: 0.95rem;
	padding: 2rem 0;
	text-align: center;
}

/* ─── Tables ───────────────────────────────────────────────────────────── */

.table-wrap {
	overflow-x: auto;
	border: 1px solid var(--border);
	border-radius: var(--radius);
	background: var(--bg-elev);
}

table.data-table {
	width: 100%;
	border-collapse: collapse;
	font-size: 0.95rem;
	font-variant-numeric: tabular-nums;
}

.data-table th, .data-table td {
	padding: 0.85rem 1rem;
	text-align: right;
	border-bottom: 1px solid var(--border);
	white-space: nowrap;
}

.data-table td code {
	font-size: 0.82rem;
	word-break: break-all;
	white-space: normal;
	display: inline-block;
	max-width: 24ch;
	line-height: 1.3;
}

.table-wrap {
	overflow-x: auto;
	-webkit-overflow-scrolling: touch;
}

.data-table th:first-child, .data-table td:first-child { text-align: left; }

.data-table thead th {
	background: var(--bg-elev-2);
	font-weight: 600;
	color: var(--ink-mute);
	font-size: 0.85rem;
	text-transform: uppercase;
	letter-spacing: 0.05em;
	position: sticky;
	top: 0;
	z-index: 1;
	cursor: pointer;
	user-select: none;
}

.data-table thead th[aria-sort="ascending"]::after { content: " ▲"; color: var(--accent); }
.data-table thead th[aria-sort="descending"]::after { content: " ▼"; color: var(--accent); }

.data-table tbody tr:last-child td { border-bottom: 0; }

.data-table tbody tr:hover { background: color-mix(in oklab, var(--accent) 5%, transparent); }

.data-table .key-pill {
	display: inline-flex;
	align-items: center;
	gap: 0.4rem;
	padding: 0.25rem 0.6rem;
	border-radius: 999px;
	background: color-mix(in oklab, var(--accent) 12%, transparent);
	color: var(--ink);
	font-size: 0.85rem;
	font-weight: 600;
}

.data-table .share-bar {
	display: inline-block;
	width: 100%;
	max-width: 120px;
	height: 6px;
	background: var(--bg-elev-2);
	border-radius: 99px;
	overflow: hidden;
	vertical-align: middle;
}

.data-table .share-bar:empty,
.data-table .share-bar span[style*="width: 0.00%"],
.data-table .share-bar span[style*="width:0.00%"] {
	display: none;
}

.data-table .share-bar span {
	display: block;
	height: 100%;
	background: linear-gradient(90deg, var(--accent), var(--accent-hot));
	transition: width 0.4s cubic-bezier(0.25, 1, 0.5, 1);
}

.table-footnote {
	margin: 0.75rem 1rem 0;
	padding-block: 0.5rem 0;
	font-size: 0.8rem;
	color: var(--ink-fade);
	font-style: italic;
}

/* ─── Hourly Chart ─────────────────────────────────────────────────────── */

.chart-wrap {
	background: var(--bg-elev);
	border: 1px solid var(--border);
	border-radius: var(--radius);
	padding: 1.5rem;
	box-shadow: var(--shadow-1);
}

.chart-wrap svg {
	display: block;
	width: 100%;
	height: auto;
	aspect-ratio: 16 / 7;
}

.chart-axis text {
	font-size: 11px;
	font-family: var(--font-mono);
	fill: var(--ink-fade);
}

.chart-grid line {
	stroke: var(--border);
	stroke-dasharray: 2 4;
}

.chart-line { fill: none; stroke: var(--accent); stroke-width: 2.5; }
.chart-area { fill: url(#chartFill); opacity: 0.4; }
.chart-dot { fill: var(--accent-hot); stroke: var(--bg-elev); stroke-width: 2; }

.chart-toggle { display: flex; gap: 0.5rem; margin-block-end: 1rem; flex-wrap: wrap; }
.chart-toggle button {
	padding: 0.5rem 1rem;
	border-radius: 999px;
	background: var(--bg-elev-2);
	color: var(--ink-mute);
	border: 1px solid var(--border);
	font-size: 0.85rem;
	font-weight: 500;
	cursor: pointer;
	transition: all 0.15s ease;
}
.chart-toggle button[aria-pressed="true"] {
	background: linear-gradient(135deg, var(--accent), var(--accent-hot));
	color: #fff;
	border-color: transparent;
}

/* ─── Downloads ────────────────────────────────────────────────────────── */

.downloads {
	list-style: none;
	padding: 0;
	display: grid;
	grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
	gap: 0.5rem;
}

.downloads a {
	display: block;
	padding: 1rem 1.25rem;
	background: var(--bg-elev);
	border: 1px solid var(--border);
	border-radius: var(--radius-sm);
	font-weight: 600;
	font-family: var(--font-mono);
	font-size: 0.9rem;
	transition: all 0.15s ease;
}

.downloads a:hover {
	background: var(--bg-elev-2);
	border-color: var(--accent);
	transform: translateY(-2px);
}

/* ─── Footer ───────────────────────────────────────────────────────────── */

.site-footer {
	max-width: var(--container);
	margin: 0 auto;
	padding: clamp(2rem, 4vw, 4rem) var(--gutter);
	border-top: 1px solid var(--border);
	color: var(--ink-mute);
	font-size: 0.9rem;
	display: grid;
	gap: 1.5rem;
}

.site-footer a { font-weight: 600; color: var(--ink); }
.site-footer a:hover { color: var(--accent); }
.site-footer p + p { margin-block-start: 0.5rem; }

.source-link {
	padding-block-start: 1rem;
	border-top: 1px solid var(--border);
	text-align: right;
}

@media (max-width: 480px) {
	.site-footer { font-size: 0.85rem; }
}

/* ─── Interactive Controls (Filters) ──────────────────────────────────── */

.controls-wrap {
	display: grid;
	gap: 1.5rem;
	padding: 1.5rem;
	background: var(--bg-elev);
	border: 1px solid var(--border);
	border-radius: var(--radius);
	box-shadow: var(--shadow-1);
}

.controls-metric {
	display: flex;
	flex-wrap: wrap;
	gap: 0.5rem;
	padding-block-end: 1rem;
	border-bottom: 1px dashed var(--border);
}

.controls-metric__btn {
	padding: 0.5rem 1rem;
	border-radius: 999px;
	background: var(--bg-elev-2);
	color: var(--ink-mute);
	border: 1px solid var(--border);
	font-size: 0.875rem;
	font-weight: 500;
	font-family: inherit;
	cursor: pointer;
	transition: background 0.15s ease, color 0.15s ease, border-color 0.15s ease, transform 0.15s ease;
}

.controls-metric__btn:hover {
	border-color: color-mix(in oklab, var(--accent) 50%, var(--border));
	color: var(--ink);
}

.controls-metric__btn[aria-checked="true"],
.controls-metric__btn.is-active {
	background: linear-gradient(135deg, var(--accent), var(--accent-hot));
	color: #0b0b14;
	border-color: transparent;
	font-weight: 700;
}

.controls-keys {
	display: grid;
	gap: 0.75rem;
}

.controls-keys__label {
	display: flex;
	align-items: center;
	justify-content: space-between;
	gap: 1rem;
	font-size: 0.875rem;
	color: var(--ink-mute);
	font-weight: 600;
}

.controls-keys__all {
	padding: 0.35rem 0.85rem;
	border-radius: 999px;
	background: transparent;
	border: 1px solid var(--border);
	color: var(--ink-mute);
	font-size: 0.8rem;
	font-family: inherit;
	font-weight: 600;
	cursor: pointer;
	transition: all 0.15s ease;
}

.controls-keys__all:hover {
	border-color: var(--accent);
	color: var(--accent);
}

.controls-keys__chips {
	display: flex;
	flex-wrap: wrap;
	gap: 0.5rem;
}

.key-chip {
	padding: 0.4rem 0.85rem;
	border-radius: 999px;
	background: color-mix(in oklab, var(--accent) 18%, var(--bg-elev-2));
	color: var(--ink);
	border: 1px solid color-mix(in oklab, var(--accent) 40%, var(--border));
	font-size: 0.8rem;
	font-family: var(--font-mono);
	font-weight: 600;
	cursor: pointer;
	transition: background 0.15s ease, color 0.15s ease, border-color 0.15s ease, opacity 0.15s ease;
}

.key-chip[aria-pressed="false"],
.key-chip.is-off {
	background: var(--bg-elev-2);
	color: var(--ink-fade);
	border-color: var(--border);
	opacity: 0.6;
}

.key-chip:hover {
	border-color: var(--accent);
	color: var(--ink);
}

/* Faded rows (deselected keys still shown for comparison) */
.data-table tr.is-faded {
	opacity: 0.42;
	filter: grayscale(0.5);
}

/* Emphasized metric cell */
.data-table td.is-emphasized {
	color: var(--accent);
	font-weight: 700;
}

/* Chart note */
.chart-note {
	margin-block-start: 0.75rem;
	font-size: 0.8rem;
	color: var(--ink-fade);
	font-family: var(--font-mono);
	text-align: right;
}

/* Stat card emphasis tier (top-3 KPIs) */
.stat-card--emphasis {
	border-color: color-mix(in oklab, var(--accent) 35%, var(--border));
	box-shadow: var(--shadow-1), 0 0 0 1px color-mix(in oklab, var(--accent) 18%, transparent) inset;
}

.stat-card--emphasis .stat-value {
	background: linear-gradient(135deg, var(--accent) 0%, var(--accent-hot) 100%);
	-webkit-background-clip: text;
	background-clip: text;
	color: transparent;
}

@media (max-width: 480px) {
	.controls-wrap { padding: 1rem; }
	.controls-metric__btn,
	.controls-keys__all,
	.key-chip { font-size: 0.78rem; padding: 0.35rem 0.7rem; }
}

/* ─── Hourly chart + table containment fixes ──────────────────────────── */

.chart-wrap {
	max-width: 100%;
	overflow: hidden;
	box-sizing: border-box;
}

.chart-wrap svg {
	display: block;
	width: 100%;
	height: auto;
	max-width: 100%;
}

.table-wrap {
	max-width: 100%;
	box-sizing: border-box;
}

.data-table td.is-emphasized {
	background: transparent;
}