:root {
  --panel-bg: #f6f8fb;
  --panel-border: #d6dde7;
  --text: #1f2937;
  --muted: #5f6b7a;
  --accent: #114b84;
  --timeline-ink: #111111;
  --timeline-paper: #ffffff;
  --timeline-size: 180px;
}

html,
body {
  margin: 0;
  padding: 0;
  width: 100%;
  height: 100%;
  font-family: "Source Sans 3", "Segoe UI", sans-serif;
  color: var(--text);
}

#app {
  position: relative;
  display: grid;
  grid-template-columns: 340px 1fr;
  width: 100%;
  height: 100%;
}

#controls {
  box-sizing: border-box;
  display: flex;
  flex-direction: column;
  overflow: auto;
  background: var(--panel-bg);
  border-right: 1px solid var(--panel-border);
  padding: 16px;
}

#controls h1 {
  margin: 0 0 12px;
  font-size: 1.2rem;
}

.citation,
.codebook-link {
  margin: 8px 0 10px;
  font-size: 0.88rem;
  color: var(--muted);
}

.codebook-link a {
  color: var(--accent);
  text-decoration: underline;
}

#datasetCitation {
  margin-top: auto;
}

.variable-meta-item + .variable-meta-item {
  margin-top: 8px;
}

.variable-meta-label {
  margin: 0 0 2px;
  font-size: 0.78rem;
  font-weight: 700;
  color: var(--muted);
}

.variable-meta-value {
  margin: 0;
  font-size: 0.86rem;
  line-height: 1.35;
  white-space: pre-wrap;
}

.variable-meta-dialog {
  width: min(860px, calc(100vw - 32px));
  max-height: calc(100vh - 48px);
  border: 1px solid #c4ccd8;
  border-radius: 10px;
  padding: 0;
}

.variable-meta-dialog::backdrop {
  background: rgba(15, 23, 42, 0.45);
}

.variable-meta-dialog-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  padding: 14px 16px;
  border-bottom: 1px solid #e5e7eb;
}

.variable-meta-dialog-header h2 {
  margin: 0;
  font-size: 1rem;
}

.variable-meta-close-btn {
  width: auto !important;
  margin-top: 0 !important;
  padding: 6px 10px !important;
}

.variable-meta-content {
  max-height: calc(100vh - 170px);
  overflow: auto;
  padding: 14px 16px 18px;
}

#controls label {
  display: block;
  margin: 10px 0 6px;
  font-weight: 600;
  font-size: 0.92rem;
}

#controls select,
#controls input[type="number"],
#controls button {
  box-sizing: border-box;
  width: 100%;
  padding: 8px;
  border: 1px solid #c4ccd8;
  border-radius: 6px;
  font-size: 0.95rem;
  background: #fff;
}

#controls input[type="range"] {
  box-sizing: border-box;
  width: 100%;
  min-width: 0;
  padding: 0;
  border: none;
  border-radius: 0;
  background: transparent;
  cursor: pointer;
  accent-color: var(--accent);
}

#controls button {
  margin-top: 14px;
  cursor: pointer;
  border: 1px solid #0f3f6f;
  color: #fff;
  background: var(--accent);
}

#controls button:hover {
  background: #0f3f6f;
}

.variant-picker {
  margin-top: 8px;
  padding: 8px;
  border: 1px solid #c4ccd8;
  border-radius: 6px;
  background: #ffffff;
}

.variant-picker summary {
  cursor: pointer;
  font-weight: 600;
  color: var(--muted);
}

.variant-picker label {
  margin-top: 8px;
}

.timeline-main {
  display: flex;
  flex-direction: column;
  align-items: stretch;
  gap: 8px;
}

.timeline-slider-wrap {
  --selected-pct: 50%;
  --axis-y: 34px;
  position: relative;
  height: var(--timeline-size);
  min-width: 0;
}

.timeline-line {
  position: absolute;
  top: var(--axis-y);
  left: 0;
  width: 100%;
  height: 3px;
  background: var(--timeline-ink);
  transform: translateY(-50%);
}

#yearSlider {
  position: absolute;
  inset: 0;
  z-index: 1;
  opacity: 0;
  cursor: ew-resize;
}

#yearSlider:focus-visible {
  outline: none;
}

.timeline-scale {
  position: absolute;
  inset: 0;
  z-index: 2;
  pointer-events: none;
}

.timeline-tick {
  position: absolute;
  top: var(--axis-y);
  transform: translate(-50%, 0%);
  display: flex;
  flex-direction: column;
  align-items: center;
}

.timeline-tick-mark {
  width: 2px;
  height: 8px;
  background: var(--timeline-ink);
  opacity: 0.4;
}

.timeline-tick.is-major .timeline-tick-mark {
  height: 16px;
  opacity: 0.8;
}

.timeline-tick-label {
  margin-top: 3px;
  font-size: 0.68rem;
  line-height: 1;
  color: var(--timeline-ink);
  opacity: 0.7;
  white-space: nowrap;
}

.timeline-selected-marker {
  position: absolute;
  top: var(--axis-y);
  left: var(--selected-pct);
  transform: translate(-50%, 0%);
  display: flex;
  flex-direction: column;
  align-items: center;
  pointer-events: auto;
  z-index: 3;
  cursor: grab;
  touch-action: none;
  user-select: none;
}

.timeline-selected-marker.is-dragging {
  cursor: grabbing;
}

.timeline-year-label {
  background: var(--timeline-ink);
  color: var(--timeline-paper);
  font-size: clamp(2rem, 4vw, 2.75rem);
  line-height: 1;
  font-weight: 700;
  padding: 8px 20px;
  border-radius: 6px;
  letter-spacing: 0.01em;
}

.timeline-marker-line {
  width: 3px;
  height: 60px;
  background: var(--timeline-ink);
}

.timeline-controls {
  display: flex;
  align-items: center;
}

.playback-control {
  display: inline-flex;
  border: 2px solid var(--timeline-ink);
  border-radius: 6px;
  overflow: hidden;
  background: var(--timeline-paper);
}

.playback-control button {
  border: 0;
  background: transparent;
  color: var(--timeline-ink);
  font-weight: 600;
  cursor: pointer;
  line-height: 1;
}

.playback-control .play-button {
  border-right: 2px solid var(--timeline-ink);
  padding: 6px 18px;
  min-width: 64px;
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.playback-control .play-button svg {
  width: 14px;
  height: 14px;
  stroke-width: 2.25;
}

.speed-button {
  display: inline-flex;
  gap: 6px;
  align-items: center;
  padding: 0 4px;
}

.speed-button button {
  padding: 6px 8px;
  display: flex;
  align-items: center;
}

.speed-button svg {
  width: 15px;
  height: 15px;
  stroke-width: 2.5;
}

#speedDisplay {
  min-width: 2em;
  text-align: center;
  font-size: 0.86rem;
  font-weight: 700;
  color: var(--timeline-ink);
}

.playback-control button:hover {
  background: #ebebeb;
}

.playback-control button:active {
  background: #ddd;
}

#timeline-overlay {
  position: fixed;
  top: calc(12px + env(safe-area-inset-top, 0px));
  left: calc(340px + ((100vw - 340px) / 2));
  transform: translateX(-50%);
  z-index: 1200;
  width: min(760px, calc(100vw - 340px - 28px));
  margin: 0 14px;
  background: transparent;
  border: none;
  box-shadow: none;
  padding: 0;
  box-sizing: border-box;
  pointer-events: auto;
}

.timeline-year-readout {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.hint {
  margin-top: 14px;
  color: var(--muted);
  font-size: 0.9rem;
  line-height: 1.4;
}

.citation {
  margin: 6px 0 0;
  padding: 6px 8px;
  border-left: 3px solid var(--accent);
  background: #eef3fa;
  color: var(--muted);
  font-size: 0.82rem;
  line-height: 1.4;
  border-radius: 0 4px 4px 0;
}

#map {
  position: relative;
  width: 100%;
  height: 100%;
}

/* ---- Quantile legend (Leaflet control) ---- */
.map-legend {
  background: rgba(255, 255, 255, 0.92);
  border: 1px solid #c4ccd8;
  border-radius: 6px;
  padding: 8px 10px;
  font-family: "Source Sans 3", "Segoe UI", sans-serif;
  font-size: 0.8rem;
  color: #1f2937;
  box-shadow: 0 1px 4px rgba(0,0,0,0.15);
  min-width: 160px;
}

.legend-title {
  font-weight: 600;
  margin-bottom: 2px;
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: #5f6b7a;
}

.legend-subtitle {
  margin-bottom: 6px;
  font-size: 0.72rem;
  line-height: 1.25;
  color: #5f6b7a;
}

.legend-bar {
  display: flex;
  border-radius: 3px;
  overflow: hidden;
}

.legend-swatch {
  flex: 1;
  height: 14px;
}

.legend-labels {
  display: flex;
  justify-content: space-between;
  margin-top: 3px;
  font-size: 0.75rem;
  color: #5f6b7a;
}

.legend-note {
  margin-top: 5px;
  font-size: 0.7rem;
  line-height: 1.3;
  color: #5f6b7a;
}

/* Suppress Leaflet tile fade animation during auto-play */
.autoplay-active .leaflet-tile {
  transition: none !important;
  opacity: 1 !important;
}

/* Keep the data overlay steady during zoom tile refreshes */
.demscore-hex-pane .leaflet-tile {
  transition: none !important;
}

.zoom-display {
  background: rgba(255, 255, 255, 0.8);
  padding: 2px 6px;
  border-radius: 4px;
  font-size: 0.75rem;
  color: #333;
  pointer-events: none;
}

/* Loading indicator */
#loading-indicator {
  position: absolute;
  top: 12px;
  right: 12px;
  z-index: 1150;
  width: 28px;
  height: 28px;
  border-radius: 50%;
  border: 3px solid rgba(17, 75, 132, 0.18);
  border-top-color: #114b84;
  animation: demscore-spin 0.75s linear infinite;
  opacity: 0;
  transition: opacity 0.15s ease;
  pointer-events: none;
}

#loading-indicator.is-loading {
  opacity: 1;
}

@keyframes demscore-spin {
  to { transform: rotate(360deg); }
}

@media (max-width: 900px) {
  #app {
    grid-template-columns: 1fr;
    grid-template-rows: auto 1fr;
  }

  #controls {
    border-right: 0;
    border-bottom: 1px solid var(--panel-border);
    max-height: 45vh;
  }

  #map {
    grid-column: 1;
    grid-row: 2;
  }

  #timeline-overlay {
    position: relative;
    grid-column: 1;
    grid-row: 2;
    justify-self: center;
    align-self: start;
    top: calc(12px + env(safe-area-inset-top, 0px));
    left: auto;
    transform: none;
    width: min(620px, calc(100vw - 20px));
    margin: 0 10px;
  }

  .timeline-slider-wrap {
    --axis-y: 34px;
    height: 164px;
  }

  .timeline-year-label {
    font-size: clamp(1.6rem, 6vw, 2.2rem);
    padding: 7px 16px;
  }

  .timeline-marker-line {
    height: 50px;
  }

  .timeline-tick-mark {
    height: 6px;
  }

  .timeline-tick.is-major .timeline-tick-mark {
    height: 12px;
  }

  .timeline-controls {
    justify-content: flex-end;
  }
}