:root {
  color-scheme: light;
  --surface-page:   #f9f9f7;
  --surface-card:   #fcfcfb;
  --ink-primary:    #0b0b0b;
  --ink-secondary:  #52514e;
  --ink-muted:      #898781;
  --grid:           #e1e0d9;
  --axis:           #c3c2b7;
  --border:         rgba(11, 11, 11, 0.10);
  --accent:         #2a78d6;
  --danger:         #d03b3b;

  --series-1: #2a78d6;
  --series-2: #eb6834;
  --series-3: #1baf7a;
  --series-4: #eda100;
  --series-5: #e87ba4;
  --series-6: #008300;
  --series-7: #4a3aa7;
  --series-8: #e34948;
  --series-muted: #898781;
}

@media (prefers-color-scheme: dark) {
  :root:where(:not([data-theme="light"])) {
    color-scheme: dark;
    --surface-page:   #0d0d0d;
    --surface-card:   #1a1a19;
    --ink-primary:    #ffffff;
    --ink-secondary:  #c3c2b7;
    --ink-muted:      #898781;
    --grid:           #2c2c2a;
    --axis:           #383835;
    --border:         rgba(255, 255, 255, 0.10);
    --accent:         #3987e5;
    --danger:         #e66767;

    --series-1: #3987e5;
    --series-2: #d95926;
    --series-3: #199e70;
    --series-4: #c98500;
    --series-5: #d55181;
    --series-6: #008300;
    --series-7: #9085e9;
    --series-8: #e66767;
    --series-muted: #898781;
  }
}

:root[data-theme="dark"] {
  color-scheme: dark;
  --surface-page:   #0d0d0d;
  --surface-card:   #1a1a19;
  --ink-primary:    #ffffff;
  --ink-secondary:  #c3c2b7;
  --ink-muted:      #898781;
  --grid:           #2c2c2a;
  --axis:           #383835;
  --border:         rgba(255, 255, 255, 0.10);
  --accent:         #3987e5;
  --danger:         #e66767;

  --series-1: #3987e5;
  --series-2: #d95926;
  --series-3: #199e70;
  --series-4: #c98500;
  --series-5: #d55181;
  --series-6: #008300;
  --series-7: #9085e9;
  --series-8: #e66767;
  --series-muted: #898781;
}

* { box-sizing: border-box; }

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

a { color: var(--accent); }

.app-header {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 1rem 1.5rem;
  border-bottom: 1px solid var(--border);
  background: var(--surface-card);
  position: sticky;
  top: 0;
  z-index: 10;
}

.page-nav { display: flex; gap: 0.25rem; }
.page-nav a {
  color: var(--ink-secondary);
  text-decoration: none;
  font-size: 0.85rem;
  padding: 0.4rem 0.7rem;
  border-radius: 6px;
}
.page-nav a:hover { background: var(--grid); }
.page-nav a[aria-current="page"] { color: #fff; background: var(--accent); }

.app-header-title { min-width: 0; }
.app-header-title h1 { margin: 0; font-size: 1.4rem; }
.subtitle { margin: 0.15rem 0 0; color: var(--ink-secondary); font-size: 0.9rem; }

.app-header-controls {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  flex-wrap: wrap;
  font-size: 0.85rem;
}

.last-refreshed { color: var(--ink-secondary); }

button {
  font: inherit;
  cursor: pointer;
  border: 1px solid var(--border);
  background: var(--surface-card);
  color: var(--ink-primary);
  border-radius: 6px;
  padding: 0.4rem 0.7rem;
}
button:hover { border-color: var(--ink-muted); }

.theme-toggle { display: inline-flex; border: 1px solid var(--border); border-radius: 6px; overflow: hidden; }
.theme-toggle button { border: none; border-radius: 0; }
.theme-toggle button + button { border-left: 1px solid var(--border); }
.theme-toggle button[aria-pressed="true"] { background: var(--accent); color: #fff; }

main {
  max-width: 1200px;
  margin: 0 auto;
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.card {
  background: var(--surface-card);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 1.25rem;
  min-width: 0;
}

.card h2 { margin-top: 0; }

.section-note {
  background: color-mix(in srgb, var(--danger) 12%, transparent);
  color: var(--danger);
  border-radius: 6px;
  padding: 0.5rem 0.75rem;
  font-size: 0.9rem;
}

.source-note { color: var(--ink-secondary); font-size: 0.85rem; }
.filter-note { color: var(--ink-secondary); font-size: 0.85rem; margin-bottom: 0.5rem; }

.chart-grid { display: grid; gap: 1rem; }
.chart-grid.four-up { grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); }

.chart-card { margin-bottom: 1rem; min-width: 0; }
.chart-card:last-child { margin-bottom: 0; }
.chart-card h3 { margin: 0 0 0.5rem; font-size: 0.95rem; color: var(--ink-secondary); font-weight: 600; }

canvas {
  display: block;
  width: 100%;
  height: 220px;
}
.chart-card.wide canvas { height: 280px; }

.legend {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem 1.25rem;
  margin-top: 0.5rem;
  font-size: 0.8rem;
  color: var(--ink-secondary);
}
.legend-item { display: inline-flex; align-items: center; gap: 0.4rem; }
.legend-swatch { display: inline-block; width: 18px; height: 0; border-top-width: 3px; border-top-style: solid; }
.legend-item.emphasis { font-weight: 600; color: var(--ink-primary); }

.data-table { margin-top: 0.5rem; font-size: 0.8rem; }
.data-table summary { cursor: pointer; color: var(--ink-secondary); }
.data-table table { border-collapse: collapse; width: 100%; margin-top: 0.5rem; }
.data-table th, .data-table td {
  text-align: right;
  padding: 0.25rem 0.5rem;
  border-bottom: 1px solid var(--grid);
  font-variant-numeric: tabular-nums;
}
.data-table th:first-child, .data-table td:first-child { text-align: left; }

.city-toggles {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 1rem;
  margin-bottom: 1rem;
}
.city-toggles label { display: inline-flex; align-items: center; gap: 0.35rem; font-size: 0.85rem; }
.city-toggles input:disabled + span { color: var(--ink-muted); }

#hotel-list { columns: 2; font-size: 0.9rem; }
@media (max-width: 600px) { #hotel-list { columns: 1; } }

.admin-notice { background: color-mix(in srgb, var(--series-3) 12%, transparent); color: var(--series-3); }

.admin-form { display: flex; align-items: center; gap: 0.75rem; flex-wrap: wrap; }
.admin-form label { font-size: 0.9rem; color: var(--ink-secondary); }
.admin-form input[type="password"] {
  font: inherit;
  padding: 0.4rem 0.6rem;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: var(--surface-page);
  color: var(--ink-primary);
}

.admin-jobs { display: flex; flex-direction: column; gap: 0.5rem; margin-bottom: 1.25rem; }
.admin-job-row { display: flex; align-items: center; gap: 0.6rem; font-size: 0.9rem; }
.admin-job-row span:first-child { min-width: 10rem; }
.admin-job-row input[type="number"] {
  width: 4.5rem;
  font: inherit;
  padding: 0.3rem 0.5rem;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: var(--surface-page);
  color: var(--ink-primary);
}
.admin-job-suffix { color: var(--ink-muted); }

.admin-actions { display: flex; gap: 0.6rem; margin: 1rem 0; }

.secret-reveal {
  font-variant-numeric: tabular-nums;
  background: var(--surface-page);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 0.6rem 0.8rem;
  word-break: break-all;
}

.app-footer {
  text-align: center;
  color: var(--ink-muted);
  font-size: 0.8rem;
  padding: 1.5rem;
}

.chart-tooltip {
  position: fixed;
  pointer-events: none;
  background: var(--surface-card);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 0.5rem 0.65rem;
  font-size: 0.8rem;
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.18);
  z-index: 100;
  max-width: 240px;
}
.chart-tooltip .tooltip-title { color: var(--ink-secondary); margin-bottom: 0.3rem; }
.chart-tooltip .tooltip-row { display: flex; align-items: center; gap: 0.4rem; white-space: nowrap; }
.chart-tooltip .tooltip-key { display: inline-block; width: 12px; height: 3px; border-radius: 2px; flex: none; }
.chart-tooltip .tooltip-value { font-weight: 600; margin-left: auto; padding-left: 0.6rem; }

.scatter3d-controls {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 0.5rem 1rem;
  margin-bottom: 0.5rem;
}
.viz-hint { color: var(--ink-muted); font-size: 0.8rem; margin: 0; }

.chart-card.scatter3d canvas { height: 480px; cursor: grab; touch-action: none; }
.chart-card.scatter3d canvas:active { cursor: grabbing; }

.ratio-legend {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  margin-top: 0.75rem;
  font-size: 0.8rem;
  color: var(--ink-secondary);
}
.ratio-legend .ratio-gradient {
  width: 160px;
  height: 10px;
  border-radius: 5px;
  background: linear-gradient(to right, #FF0000, #0000FF);
  border: 1px solid var(--border);
}