:root {
  color-scheme: light;
  --page: #f9f9f7;
  --surface: #fcfcfb;
  --surface-2: #f3f2ef;
  --text-primary: #0b0b0b;
  --text-secondary: #52514e;
  --text-muted: #898781;
  --grid: #e1e0d9;
  --axis: #c3c2b7;
  --border: rgba(11, 11, 11, 0.10);
  --accent: #2a78d6;

  --series-1: #2a78d6;
  --series-2: #eb6834;
  --series-3: #1baf7a;
  --neutral-1: #b5b3ac;
  --neutral-2: #77756f;

  --critical: #d03b3b;
  --good: #006300;

  --seq-0: #f0efec;
  --seq-1: #cde2fb;
  --seq-2: #9ec5f4;
  --seq-3: #6da7ec;
  --seq-4: #3987e5;
  --seq-5: #256abf;
  --seq-6: #184f95;
  --seq-7: #0d366b;

  --radius: 12px;
  --font: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    color-scheme: dark;
    --page: #0d0d0d;
    --surface: #1a1a19;
    --surface-2: #232321;
    --text-primary: #ffffff;
    --text-secondary: #c3c2b7;
    --text-muted: #898781;
    --grid: #2c2c2a;
    --axis: #383835;
    --border: rgba(255, 255, 255, 0.10);
    --accent: #3987e5;
    --series-1: #3987e5;
    --series-2: #d95926;
    --series-3: #199e70;
    --neutral-1: #5d5c57;
    --neutral-2: #8f8d86;
    --critical: #e66767;
    --good: #0ca30c;
    --seq-0: #262624;
    --seq-1: #0d366b;
    --seq-2: #104281;
    --seq-3: #184f95;
    --seq-4: #256abf;
    --seq-5: #3987e5;
    --seq-6: #6da7ec;
    --seq-7: #b7d3f6;
  }
}

:root[data-theme="dark"] {
  color-scheme: dark;
  --page: #0d0d0d;
  --surface: #1a1a19;
  --surface-2: #232321;
  --text-primary: #ffffff;
  --text-secondary: #c3c2b7;
  --text-muted: #898781;
  --grid: #2c2c2a;
  --axis: #383835;
  --border: rgba(255, 255, 255, 0.10);
  --accent: #3987e5;
  --series-1: #3987e5;
  --series-2: #d95926;
  --series-3: #199e70;
  --neutral-1: #5d5c57;
  --neutral-2: #8f8d86;
  --critical: #e66767;
  --good: #0ca30c;
  --seq-0: #262624;
  --seq-1: #0d366b;
  --seq-2: #104281;
  --seq-3: #184f95;
  --seq-4: #256abf;
  --seq-5: #3987e5;
  --seq-6: #6da7ec;
  --seq-7: #b7d3f6;
}

* { box-sizing: border-box; }

html, body { margin: 0; }

body {
  background: var(--page);
  color: var(--text-primary);
  font-family: var(--font);
  font-size: 14px;
  line-height: 1.45;
  -webkit-font-smoothing: antialiased;
}

h1, h2 { margin: 0; font-weight: 600; }
h1 { font-size: 18px; letter-spacing: -0.01em; }
h2 { font-size: 15px; }

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 16px 24px;
  border-bottom: 1px solid var(--border);
  background: var(--surface);
  position: sticky;
  top: 0;
  z-index: 1000;
}

.brand { display: flex; align-items: center; gap: 12px; min-width: 0; }
.brand-mark {
  width: 32px; height: 32px; flex: none;
  border-radius: 8px;
  background: linear-gradient(135deg, var(--series-1), var(--seq-6));
  position: relative;
}
.brand-mark::after {
  content: "";
  position: absolute; inset: 9px 7px 11px;
  border: 2px solid #fff; border-radius: 4px;
}
.sub { margin: 2px 0 0; color: var(--text-secondary); font-size: 13px; }

main { max-width: 1320px; margin: 0 auto; padding: 20px 24px 40px; }

.ghost-btn {
  font: inherit;
  display: inline-flex; align-items: center; gap: 6px;
  padding: 8px 12px;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text-primary);
  cursor: pointer;
}
.ghost-btn:hover { background: var(--surface-2); }

/* Filters */
.filters {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-end;
  gap: 12px;
  margin-bottom: 16px;
}
.field { display: flex; flex-direction: column; gap: 4px; min-width: 0; }
.field > span, .field > legend {
  font-size: 12px; color: var(--text-secondary); padding: 0;
}
.field input, .field select, .search {
  font: inherit;
  height: 36px;
  padding: 0 10px;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text-primary);
}
.field-wide select { min-width: 240px; max-width: 100%; }
.field input:focus-visible, .field select:focus-visible, .search:focus-visible,
.ghost-btn:focus-visible, .chip:focus-visible, th:focus-visible {
  outline: 2px solid var(--accent); outline-offset: 1px;
}

.chips { border: 0; margin: 0; padding: 0; }
.chips .chip-row { display: flex; flex-wrap: wrap; gap: 6px; }
.chip {
  font: inherit; font-size: 13px;
  display: inline-flex; align-items: center; gap: 6px;
  height: 36px; padding: 0 12px;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text-secondary);
  cursor: pointer;
}
.chip .dot { width: 8px; height: 8px; border-radius: 50%; }
.chip[aria-pressed="true"] {
  color: var(--text-primary);
  background: var(--surface-2);
  border-color: var(--text-muted);
}
.chip[aria-pressed="false"] .dot { opacity: 0.3; }

/* KPIs */
.kpis {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 12px;
  margin-bottom: 16px;
}
.kpi {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 14px 16px;
}
.kpi-label { font-size: 12px; color: var(--text-secondary); }
.kpi-value { font-size: 26px; font-weight: 600; margin-top: 4px; letter-spacing: -0.02em; }
.kpi-note { font-size: 12px; color: var(--text-muted); margin-top: 2px; }

/* Cards */
.grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
}
.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px;
  min-width: 0;
  transition: opacity 0.15s;
}
.span-2 { grid-column: span 2; }
.card-head {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 12px;
  flex-wrap: wrap;
  margin-bottom: 12px;
}
.hint { margin: 2px 0 0; font-size: 12px; color: var(--text-secondary); }

.chart-box { position: relative; height: 280px; }
.chart-box.tall { height: 340px; }

.legend { display: flex; flex-wrap: wrap; gap: 12px; font-size: 12px; color: var(--text-secondary); }
.legend-item { display: inline-flex; align-items: center; gap: 6px; }
.legend-swatch { width: 10px; height: 10px; border-radius: 2px; }

/* Heatmap */
.heatmap {
  display: grid;
  grid-template-columns: 36px repeat(24, minmax(0, 1fr));
  gap: 2px;
  font-size: 11px;
  color: var(--text-muted);
}
.heatmap .row-label { display: flex; align-items: center; color: var(--text-secondary); }
.heatmap .col-label { text-align: center; font-variant-numeric: tabular-nums; padding-top: 2px; }
.heat-cell {
  aspect-ratio: 1 / 1.1;
  min-height: 14px;
  border-radius: 3px;
  background: var(--seq-0);
  cursor: default;
}
.heat-cell:hover, .heat-cell:focus-visible { outline: 2px solid var(--text-primary); outline-offset: -1px; }
.scale {
  display: flex; align-items: center; gap: 6px;
  margin-top: 12px; font-size: 12px; color: var(--text-secondary);
}
.scale-bar { display: flex; gap: 2px; }
.scale-bar span { width: 18px; height: 10px; border-radius: 2px; }

/* Map */
.map {
  height: 340px;
  border-radius: 8px;
  overflow: hidden;
  background: var(--surface-2);
}
.leaflet-container { font-family: var(--font); }
.leaflet-tooltip {
  background: var(--surface); color: var(--text-primary);
  border: 1px solid var(--border); box-shadow: 0 4px 12px rgba(0,0,0,0.12);
}

/* Assumptions */
.assumptions {
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 10px 12px;
  margin-bottom: 12px;
  background: var(--surface-2);
}
.assumptions summary { cursor: pointer; font-weight: 500; }
.assumption-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 12px;
  margin: 12px 0 4px;
}

/* Table */
.search { min-width: 200px; }
.table-wrap { overflow-x: auto; max-height: 480px; overflow-y: auto; border-radius: 8px; border: 1px solid var(--border); }
table.fleet { width: 100%; border-collapse: collapse; font-size: 13px; }
.fleet th, .fleet td { padding: 8px 12px; text-align: left; border-bottom: 1px solid var(--grid); white-space: nowrap; }
.fleet td:nth-child(2) { white-space: normal; min-width: 220px; }
.fleet th {
  position: sticky; top: 0;
  background: var(--surface-2);
  font-weight: 500; font-size: 12px; color: var(--text-secondary);
  cursor: pointer; user-select: none;
}
.fleet th[aria-sort="ascending"]::after { content: " ↑"; }
.fleet th[aria-sort="descending"]::after { content: " ↓"; }
.fleet .num { text-align: right; font-variant-numeric: tabular-nums; }
.fleet tbody tr:hover { background: var(--surface-2); }
.fleet .id { font-weight: 600; }
.bus-cell { display: inline-flex; align-items: center; gap: 8px; justify-content: flex-end; }
.bus-bar { display: inline-block; height: 6px; border-radius: 3px; background: var(--series-1); }
.flag { color: var(--critical); font-weight: 500; }
.table-foot { font-size: 12px; color: var(--text-muted); margin: 8px 0 0; }

/* Tooltip */
.tooltip {
  position: fixed;
  z-index: 2000;
  pointer-events: none;
  background: var(--surface);
  color: var(--text-primary);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 8px 10px;
  font-size: 12px;
  box-shadow: 0 6px 20px rgba(0,0,0,0.15);
}
.tooltip strong { display: block; font-size: 14px; }
.tooltip span { color: var(--text-secondary); }

.foot { margin-top: 24px; font-size: 12px; color: var(--text-muted); }
.foot p { margin: 4px 0; }

.loading .card, .loading .kpis { opacity: 0.5; }

@media (max-width: 900px) {
  .grid { grid-template-columns: minmax(0, 1fr); }
  .span-2 { grid-column: auto; }
}

@media (max-width: 600px) {
  .topbar { padding: 12px 16px; }
  main { padding: 16px 16px 32px; }
  .theme-text { display: none; }
  .field-wide, .field-wide select { width: 100%; min-width: 0; }
  .filters .field:not(.chips) { flex: 1 1 140px; }
  .heatmap { grid-template-columns: 28px repeat(24, minmax(0, 1fr)); gap: 1px; font-size: 9px; }
  .heatmap .col-label.odd { visibility: hidden; }
  .kpis { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .kpi-value { font-size: 22px; }
  .search { width: 100%; min-width: 0; }
}