:root {
  --page: #f9f9f7;
  --surface: #fcfcfb;
  --card-hover: #f2f1ee;
  --border: rgba(11, 11, 11, 0.1);
  --ink: #0b0b0b;
  --ink-sub: #52514e;
  --ink-muted: #898781;
  --grid: #e1e0d9;
  --axis: #c3c2b7;

  --series-blue: #2a78d6;
  --series-red: #e34948;
  --diverge-mid: #f0efec;

  --good: #0ca30c;
  --warning: #fab219;
  --serious: #ec835a;
  --critical: #d03b3b;

  --radius: 12px;
  --radius-sm: 8px;
}

html[data-theme="dark"] {
  --page: #0d0d0d;
  --surface: #1a1a19;
  --card-hover: #212120;
  --border: rgba(255, 255, 255, 0.1);
  --ink: #ffffff;
  --ink-sub: #c3c2b7;
  --ink-muted: #898781;
  --grid: #2c2c2a;
  --axis: #383835;

  --series-blue: #3987e5;
  --series-red: #e66767;
  --diverge-mid: #383835;

  --good: #0ca30c;
  --warning: #fab219;
  --serious: #ec835a;
  --critical: #d03b3b;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: system-ui, -apple-system, "Segoe UI", "Pretendard", sans-serif;
  background: var(--page);
  color: var(--ink);
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--series-blue); }

/* ---------- Header ---------- */
.site-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  padding: 16px 24px;
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  background: var(--page);
  z-index: 10;
}
.brand { display: flex; flex-direction: column; gap: 2px; }
.brand .brand-name { font-size: 18px; font-weight: 700; }
.brand .brand-sub { font-size: 12.5px; color: var(--ink-muted); }
.theme-toggle-btn {
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--ink);
  border-radius: 999px;
  width: 36px;
  height: 36px;
  cursor: pointer;
  font-size: 15px;
}
.theme-toggle-btn:hover { background: var(--card-hover); }

/* ---------- Category nav ---------- */
.category-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  padding: 16px 24px 0;
  max-width: 1080px;
  margin: 0 auto;
}
.category-chip {
  padding: 7px 14px;
  border-radius: 999px;
  font-size: 13px;
  font-weight: 600;
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--ink-sub);
}
.category-chip.active { color: var(--ink); border-color: var(--series-blue); }
.category-chip.soon { color: var(--ink-muted); font-weight: 500; }
.category-chip .soon-tag { font-weight: 500; font-size: 11px; opacity: 0.7; }

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

.section-title { display: flex; align-items: baseline; gap: 10px; margin: 20px 0 14px; }
.section-title h2 { font-size: 20px; margin: 0; }
.section-title span { font-size: 13px; color: var(--ink-muted); }

/* ---------- Cards ---------- */
.indicator-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px 22px;
  margin-bottom: 18px;
}
.indicator-card-head {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 12px;
}
.indicator-title { display: flex; flex-direction: column; gap: 3px; }
.indicator-title h3 { margin: 0; font-size: 16.5px; }
.indicator-title .source-tag { font-size: 12px; color: var(--ink-muted); }
.indicator-title .source-tag a { color: var(--ink-muted); text-decoration: underline; }

.status-chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 5px 11px;
  border-radius: 999px;
  font-size: 12.5px;
  font-weight: 700;
  white-space: nowrap;
}
.status-chip.good { background: color-mix(in srgb, var(--good) 16%, transparent); color: var(--good); }
.status-chip.warning { background: color-mix(in srgb, var(--warning) 22%, transparent); color: #8a5b00; }
html[data-theme="dark"] .status-chip.warning { color: var(--warning); }
.status-chip.critical { background: color-mix(in srgb, var(--critical) 16%, transparent); color: var(--critical); }
.status-chip .dot { width: 7px; height: 7px; border-radius: 50%; background: currentColor; }

.stat-row { display: flex; align-items: flex-end; gap: 22px; flex-wrap: wrap; margin-bottom: 14px; }
.hero-figure { font-size: 40px; font-weight: 700; line-height: 1; }
.hero-figure .unit { font-size: 18px; font-weight: 600; color: var(--ink-sub); margin-left: 4px; }
.stat-meta { display: flex; flex-direction: column; gap: 3px; font-size: 12.5px; color: var(--ink-muted); }
.stat-meta .delta.up { color: var(--series-blue); }
.stat-meta .delta.down { color: var(--series-red); }

.range-toggle { display: inline-flex; gap: 4px; margin-left: auto; }
.range-toggle button {
  border: 1px solid var(--border);
  background: transparent;
  color: var(--ink-sub);
  border-radius: 6px;
  padding: 5px 10px;
  font-size: 12.5px;
  cursor: pointer;
}
.range-toggle button.active { background: var(--series-blue); color: #fff; border-color: var(--series-blue); }

.chart-wrap { position: relative; height: 260px; margin: 10px 0 4px; }

.card-actions { display: flex; justify-content: space-between; align-items: center; margin-top: 8px; flex-wrap: wrap; gap: 8px; }
.link-btn {
  background: none;
  border: none;
  color: var(--series-blue);
  font-size: 12.5px;
  font-weight: 600;
  cursor: pointer;
  padding: 4px 0;
}

.explainer {
  font-size: 13px;
  color: var(--ink-sub);
  line-height: 1.65;
  margin: 10px 0 0;
}
.explainer strong { color: var(--ink); }

/* ---------- Data table ---------- */
.data-table-wrap { max-height: 280px; overflow-y: auto; border-top: 1px solid var(--border); margin-top: 10px; display: none; }
.data-table-wrap.open { display: block; }
table.data-table { width: 100%; border-collapse: collapse; font-size: 12.5px; }
table.data-table th, table.data-table td {
  padding: 7px 8px;
  text-align: right;
  border-bottom: 1px solid var(--border);
  font-variant-numeric: tabular-nums;
}
table.data-table th:first-child, table.data-table td:first-child { text-align: left; color: var(--ink-sub); }
table.data-table th { position: sticky; top: 0; background: var(--surface); color: var(--ink-muted); font-weight: 600; }
table.data-table td.pos { color: var(--series-blue); }
table.data-table td.neg { color: var(--series-red); }

/* ---------- Reference / PDF card (no live API) ---------- */
.reference-note {
  display: flex;
  gap: 8px;
  align-items: flex-start;
  background: color-mix(in srgb, var(--warning) 14%, transparent);
  border: 1px solid color-mix(in srgb, var(--warning) 35%, transparent);
  border-radius: var(--radius-sm);
  padding: 10px 12px;
  font-size: 12.5px;
  color: var(--ink-sub);
  margin: 4px 0 14px;
}
.pdf-frame-wrap {
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  overflow: hidden;
  height: 420px;
  background: var(--card-hover);
}
.pdf-frame-wrap iframe { width: 100%; height: 100%; border: none; }
.pdf-fallback { padding: 40px 20px; text-align: center; color: var(--ink-muted); font-size: 13px; }

/* ---------- Placeholder categories ---------- */
.placeholder-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 12px;
}
.placeholder-card {
  border: 1px dashed var(--border);
  border-radius: var(--radius-sm);
  padding: 16px;
  color: var(--ink-muted);
  font-size: 13px;
}
.placeholder-card .cat { font-weight: 700; color: var(--ink-sub); display: block; margin-bottom: 4px; font-size: 13.5px; }

.site-footer {
  max-width: 1080px;
  margin: 20px auto 40px;
  padding: 16px 24px 0;
  border-top: 1px solid var(--border);
  color: var(--ink-muted);
  font-size: 12px;
}

.loading-row { color: var(--ink-muted); font-size: 13px; padding: 20px 0; text-align: center; }

@media (max-width: 640px) {
  .site-header { padding: 14px 16px; }
  .category-nav { padding: 14px 16px 0; }
  main { padding: 16px; }
  .hero-figure { font-size: 32px; }
}