:root {
  --page: #f9f9f7;
  --surface: #fcfcfb;
  --ink: #0b0b0b;
  --ink-secondary: #52514e;
  --ink-muted: #898781;
  --border: #e1e0d9;
  --border-strong: #c3c2b7;
  --status-good: #0ca30c;
  --status-good-text: #006300;
  --status-warning: #fab219;
  --status-serious: #ec835a;
  --status-critical: #d03b3b;
  --radius: 6px;
  color-scheme: light;
}

/* Auto dark mode — same tokens, just repointed, so every component that's
   already built on these custom properties (buttons, tooltips, badges,
   chart fills via color-mix) adapts without extra dark-specific rules. */
@media (prefers-color-scheme: dark) {
  :root {
    --page: #0d0d0d;
    --surface: #1a1a19;
    --ink: #ffffff;
    --ink-secondary: #c3c2b7;
    --ink-muted: #898781;
    --border: #2c2c2a;
    --border-strong: #383835;
    --status-good-text: #0ca30c;
    color-scheme: dark;
  }
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  background: var(--page);
  color: var(--ink);
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}

a { color: inherit; }

.muted { color: var(--ink-muted); }

/* Header */

.site-header {
  background: var(--surface);
  border-bottom: 1px solid var(--border);
}
.header-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 14px 20px;
  display: flex;
  align-items: center;
  gap: 24px;
  flex-wrap: wrap;
}
.wordmark {
  font-weight: 700;
  font-size: 1.05rem;
  text-decoration: none;
  letter-spacing: -0.01em;
  white-space: nowrap;
}

.search-form {
  display: flex;
  gap: 6px;
  margin-left: auto;
}
.search-carrier, .search-number {
  border: 1px solid var(--border-strong);
  border-radius: 4px;
  padding: 8px 10px;
  font-size: 0.95rem;
  font-variant-numeric: tabular-nums;
  text-transform: uppercase;
  background: var(--surface);
  color: var(--ink);
}
.search-carrier { width: 60px; }
.search-number { width: 80px; }
.search-carrier:focus, .search-number:focus {
  outline: 2px solid var(--status-good);
  outline-offset: -1px;
}
.search-submit {
  border: 1px solid var(--ink);
  background: var(--ink);
  color: var(--surface);
  border-radius: 4px;
  padding: 8px 16px;
  font-size: 0.95rem;
  font-weight: 500;
  cursor: pointer;
}
.search-submit:hover { opacity: 0.85; }

/* Page shell */

.page {
  max-width: 1200px;
  margin: 0 auto;
  padding: 32px 20px 64px;
}

.hidden { display: none !important; }

/* Home view — centered hero search, same card/border language as the data
   page (stat-row, sections) so the two views read as one product. */

.home-view {
  min-height: 56vh;
  display: flex;
  align-items: center;
  justify-content: center;
}

.home-hero {
  width: 100%;
  max-width: 520px;
  border: 1px solid var(--border);
  background: var(--surface);
  border-radius: var(--radius);
  padding: 40px 36px;
  text-align: center;
}

.home-tagline {
  margin: 0 0 24px;
  color: var(--ink-secondary);
  font-size: 1rem;
  line-height: 1.5;
}

.home-search-form {
  display: flex;
  justify-content: center;
  gap: 8px;
}
.home-search-carrier, .home-search-number {
  padding: 12px 14px;
  font-size: 1.1rem;
}
.home-search-carrier { width: 76px; }
.home-search-number { width: 100px; }
.home-search-submit { padding: 12px 22px; font-size: 1rem; }

.section-heading {
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--ink-muted);
  font-weight: 600;
  margin: 0 0 10px;
}

.recent-searches { margin-top: 28px; padding-top: 24px; border-top: 1px solid var(--border); }
.recent-list { display: flex; flex-wrap: wrap; justify-content: center; gap: 8px; }

.recent-chip, .example-chip {
  border: 1px solid var(--border-strong);
  background: var(--surface);
  border-radius: 4px;
  padding: 6px 12px;
  font-size: 0.9rem;
  font-variant-numeric: tabular-nums;
  cursor: pointer;
  color: var(--ink);
}
.recent-chip:hover, .example-chip:hover { border-color: var(--ink); }

.example-row {
  margin-top: 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  flex-wrap: wrap;
}

@media (max-width: 560px) {
  .home-hero { padding: 32px 20px; }
  .home-search-carrier { width: 64px; }
  .home-search-number { width: 84px; }
}

/* Result view */

.result-error {
  border: 1px solid var(--status-critical);
  background: color-mix(in srgb, var(--status-critical) 8%, var(--surface));
  color: var(--ink);
  border-radius: var(--radius);
  padding: 14px 16px;
  font-size: 0.92rem;
}

.flight-title {
  display: flex;
  align-items: baseline;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 4px;
}
.flight-number {
  font-size: 1.9rem;
  font-weight: 700;
  letter-spacing: -0.01em;
}
.flight-route {
  font-size: 1.3rem;
  color: var(--ink-secondary);
  font-variant-numeric: tabular-nums;
}
.flight-cities {
  color: var(--ink-muted);
  font-size: 0.95rem;
  margin: 0;
}
.flight-operator {
  color: var(--ink-muted);
  font-size: 0.95rem;
  margin: 2px 0 24px;
}
.flight-operator strong { color: var(--ink-secondary); }

/* Stat row */

.stat-row {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--surface);
  margin-bottom: 32px;
}
.stat-tile {
  padding: 16px 18px;
  border-right: 1px solid var(--border);
}
.stat-tile:last-child { border-right: none; }
.stat-label {
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--ink-muted);
  margin-bottom: 6px;
}
.stat-value {
  font-size: 1.6rem;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
}
.stat-value.good { color: var(--status-good-text); }
.stat-value.warning { color: color-mix(in srgb, var(--status-warning) 70%, black); }
.stat-value.serious { color: color-mix(in srgb, var(--status-serious) 65%, black); }
.stat-value.critical { color: var(--status-critical); }

/* Route picker (flight numbers that cover more than one city-pair) */

.route-picker {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 4px 0 6px;
}
.route-pill {
  border: 1px solid var(--border-strong);
  background: var(--surface);
  color: var(--ink);
  border-radius: 4px;
  padding: 6px 12px;
  font-size: 0.85rem;
  font-variant-numeric: tabular-nums;
  cursor: pointer;
}
.route-pill:hover { border-color: var(--ink); }
.route-pill.active {
  border-color: var(--ink);
  background: var(--ink);
  color: var(--surface);
}
.route-pill-count { color: var(--ink-muted); }
.route-pill.active .route-pill-count { color: color-mix(in srgb, var(--surface) 70%, transparent); }
.route-picker-note {
  font-size: 0.82rem;
  color: var(--ink-muted);
  margin: 0 0 24px;
  max-width: 640px;
}

/* Section */

.section {
  margin-bottom: 40px;
}
.section-title {
  font-size: 1rem;
  font-weight: 600;
  margin: 0 0 4px;
}
.section-sub {
  font-size: 0.85rem;
  color: var(--ink-muted);
  margin: 0 0 14px;
}

/* Chart chrome (shared by histogram / day-of-week / month bar charts) */

.chart-wrap { width: 100%; overflow-x: auto; }
.bar-chart { font-family: inherit; }
.bar-chart .axis-label {
  fill: var(--ink-muted);
  font-size: 11px;
}
.bar-chart .value-label {
  fill: var(--ink-secondary);
  font-size: 11px;
  font-variant-numeric: tabular-nums;
}
.bar-chart .value-label-muted {
  fill: var(--ink-muted);
  font-size: 10px;
  font-style: italic;
}
.bar-chart .gridline { stroke: var(--border); stroke-width: 1; }
.bar-chart .baseline { stroke: var(--border-strong); stroke-width: 1; }
.bar-rect { cursor: pointer; }

.status-legend {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  margin-top: 10px;
  font-size: 0.8rem;
  color: var(--ink-secondary);
}
.status-legend-item { display: flex; align-items: center; gap: 6px; }
.status-swatch {
  width: 10px; height: 10px; border-radius: 2px; display: inline-block;
}

.chart-tooltip {
  position: absolute;
  background: var(--ink);
  color: var(--surface);
  font-size: 0.78rem;
  padding: 6px 9px;
  border-radius: 4px;
  pointer-events: none;
  white-space: nowrap;
  transform: translate(-50%, -100%);
  z-index: 5;
  opacity: 0;
  transition: opacity 0.08s ease;
}
.chart-tooltip.visible { opacity: 1; }
.chart-tooltip-container { position: relative; }

/* Tables */

.data-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.88rem;
}
.data-table th {
  text-align: left;
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--ink-muted);
  font-weight: 600;
  padding: 8px 10px;
  border-bottom: 1px solid var(--border-strong);
}
.data-table td {
  padding: 8px 10px;
  border-bottom: 1px solid var(--border);
  font-variant-numeric: tabular-nums;
  white-space: nowrap;
}
.data-table tbody tr:hover { background: color-mix(in srgb, var(--ink) 3%, var(--surface)); }
.delay-cell.good { color: var(--status-good-text); }
.delay-cell.warning { color: color-mix(in srgb, var(--status-warning) 65%, black); }
.delay-cell.serious { color: color-mix(in srgb, var(--status-serious) 60%, black); }
.delay-cell.critical { color: var(--status-critical); font-weight: 600; }

/* Live / extras */

.live-panel {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface);
  padding: 18px 20px;
}

.live-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}
@media (max-width: 640px) {
  .live-grid { grid-template-columns: 1fr; }
  .header-inner { flex-direction: column; align-items: stretch; }
  .search-form { margin-left: 0; }
}
.live-airport-card {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 12px 14px;
}
.live-airport-code { font-weight: 700; font-size: 0.95rem; margin-bottom: 6px; }
.live-line { font-size: 0.85rem; color: var(--ink-secondary); margin: 3px 0; }
.live-note { color: var(--ink-muted); font-size: 0.88rem; }

.badge {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  font-size: 0.78rem;
  padding: 2px 8px;
  border-radius: 3px;
  font-weight: 600;
}
.badge.good { background: color-mix(in srgb, var(--status-good) 14%, var(--surface)); color: var(--status-good-text); }
.badge.warning { background: color-mix(in srgb, var(--status-warning) 20%, var(--surface)); color: color-mix(in srgb, var(--status-warning) 70%, black); }
.badge.serious { background: color-mix(in srgb, var(--status-serious) 18%, var(--surface)); color: color-mix(in srgb, var(--status-serious) 60%, black); }
.badge.critical { background: color-mix(in srgb, var(--status-critical) 14%, var(--surface)); color: var(--status-critical); }
.badge.neutral { background: var(--border); color: var(--ink-secondary); }

.loading-line { color: var(--ink-muted); font-size: 0.88rem; padding: 8px 0; }