/* Shared UI components for CesiumJS voxel demos.
   Copy this file (and components.js) into a new demo folder to reuse.

   Override semantic tokens in your page's <style> block to retheme:
     :root { --ui-accent: #c06a4a; }
*/

/* ---------------------------------------------------------------------------
   Palette — Green (from hk-kaitak)
   --------------------------------------------------------------------------- */
:root {
  --green-1: #10130f;
  --green-2: #151a14;
  --green-3: #1e261c;
  --green-4: #253123;
  --green-5: #2c3b2a;
  --green-6: #354732;
  --green-7: #40563c;
  --green-8: #526d4d;
  --green-9: #627e5d;
  --green-10: #557150;
  --green-11: #adcba7;
  --green-12: #ddf6d9;
}

/* ---------------------------------------------------------------------------
   Palette — Gray (green-tinted, dark mode)
   --------------------------------------------------------------------------- */
:root {
  --gray-1: #111211;
  --gray-2: #181a18;
  --gray-3: #212321;
  --gray-4: #282a28;
  --gray-5: #30322f;
  --gray-6: #383b38;
  --gray-7: #464945;
  --gray-8: #5d615c;
  --gray-9: #6a7069;
  --gray-10: #777d77;
  --gray-11: #b1b6b0;
  --gray-12: #edeeed;

  --gray-a1: #0112110f;
  --gray-a2: #bdf5d809;
  --gray-a3: #dcf7e813;
  --gray-a4: #eafef31a;
  --gray-a5: #ecfbec23;
  --gray-a6: #eafbee2d;
  --gray-a7: #effcee3c;
  --gray-a8: #f3fff355;
  --gray-a9: #eefded66;
  --gray-a10: #f0fdf274;
  --gray-a11: #f7fef7b1;
  --gray-a12: #fefffeed;

  --gray-contrast: #ffffff;
  --gray-surface: rgba(0, 0, 0, 0.05);
  --gray-indicator: #6a7069;
  --gray-track: #6a7069;
}

/* ---------------------------------------------------------------------------
   Semantic tokens (dark mode only, solid backgrounds)
   --------------------------------------------------------------------------- */
:root {
  /* Panel */
  --ui-bg-panel:   var(--gray-2);
  --ui-bg-tooltip: var(--gray-3);
  --ui-border:     var(--gray-5);
  --ui-radius:     2px;

  /* Text hierarchy */
  --ui-text:           var(--gray-12);
  --ui-text-secondary: var(--gray-11);
  --ui-text-muted:     var(--gray-9);
  --ui-text-dim:       var(--gray-8);

  /* Accent */
  --ui-accent:        var(--green-9);
  --ui-accent-bg:     var(--green-3);
  --ui-accent-border: var(--green-7);

  /* Interactive */
  --ui-track: var(--gray-6);
  --ui-thumb: var(--gray-11);

  /* Buttons */
  --ui-btn-bg:            var(--gray-4);
  --ui-btn-border:        var(--gray-6);
  --ui-btn-bg-hover:      var(--gray-5);
  --ui-btn-bg-active:     var(--ui-accent);
  --ui-btn-border-active: var(--green-7);
}

/* ---------------------------------------------------------------------------
   Panel base — <details>/<summary> collapsible container
   --------------------------------------------------------------------------- */
.panel {
  position: absolute;
  background: var(--ui-bg-panel);
  color: var(--ui-text);
  border: 1px solid var(--ui-border);
  border-radius: var(--ui-radius);
  overflow: hidden;
  font-size: 11px;
  z-index: 1;
}

.panel summary {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 12px;
  font-size: 10px;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--ui-text-muted);
  border-bottom: 1px solid var(--ui-border);
  cursor: pointer;
  user-select: none;
  list-style: none;
}

.panel summary::-webkit-details-marker {
  display: none;
}

.panel-title {
  flex: 1;
}

.panel-arrow {
  width: 14px;
  height: 14px;
  flex-shrink: 0;
  transition: transform 0.15s ease;
}

details[open] > summary .panel-arrow {
  transform: rotate(180deg);
}

.panel-body {
  padding: 10px 14px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.panel-body--scrollable {
  max-height: 60vh;
  overflow-y: auto;
  scrollbar-width: thin;
  scrollbar-color: var(--gray-7) transparent;
}

.panel-body--scrollable::-webkit-scrollbar {
  width: 4px;
}
.panel-body--scrollable::-webkit-scrollbar-track {
  background: transparent;
}
.panel-body--scrollable::-webkit-scrollbar-thumb {
  background: var(--gray-7);
  border-radius: 2px;
}

/* Draggable panel cursors */
.panel.is-draggable summary {
  cursor: grab;
}
.panel.is-draggable.is-dragging summary {
  cursor: grabbing;
}

/* Info panel — static, not collapsible */
.panel--info {
  top: 12px;
  left: 12px;
  max-width: 200px;
}

.panel--info h1 {
  font-size: 1.15rem;
  margin: 0 0 6px;
  color: var(--ui-text);
}

.panel--info p {
  margin: 4px 0;
  font-size: 0.8rem;
  color: var(--ui-text-secondary);
  line-height: 1.4;
}

.panel--info a {
  color: var(--green-11);
}

/* ---------------------------------------------------------------------------
   Buttons
   --------------------------------------------------------------------------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 5px 10px;
  font-size: 11px;
  font-family: inherit;
  color: var(--ui-text);
  background: var(--ui-btn-bg);
  border: 1px solid var(--ui-btn-border);
  border-radius: var(--ui-radius);
  cursor: pointer;
  transition: background 0.1s, border-color 0.1s;
}

.btn:hover {
  background: var(--ui-btn-bg-hover);
}

.btn.active {
  background: var(--ui-btn-bg-active);
  border-color: var(--ui-btn-border-active);
  color: #fff;
}

.btn--accent {
  background: var(--ui-accent);
  border-color: var(--ui-accent-border);
  color: #fff;
}

.btn--accent:hover {
  background: var(--green-8);
}

.btn--block {
  display: block;
  width: 100%;
}

.btn-group {
  display: flex;
  gap: 4px;
}

.btn-group .btn {
  flex: 1;
  text-align: center;
}

/* ---------------------------------------------------------------------------
   Section label — lightweight heading inside panel body
   --------------------------------------------------------------------------- */
.section-label {
  font-size: 10px;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--ui-text-muted);
  margin-top: 4px;
}

/* ---------------------------------------------------------------------------
   Tooltip
   --------------------------------------------------------------------------- */
#tooltip {
  position: absolute;
  pointer-events: none;
  display: none;
  background: var(--ui-bg-tooltip);
  color: var(--ui-text);
  padding: 8px 12px;
  border-radius: var(--ui-radius);
  font-size: 12px;
  border-left: 3px solid transparent;
  max-width: 240px;
  line-height: 1.5;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.5);
}

/* ---------------------------------------------------------------------------
   Legend (content container — positioned by parent .panel)
   --------------------------------------------------------------------------- */
.legend-content {
  min-width: 180px;
  max-width: 280px;
}

.legend-period {
  margin: 6px 0 4px;
  font-size: 10px;
  color: var(--ui-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.legend-item {
  display: flex;
  align-items: center;
  width: 100%;
  margin-bottom: 4px;
  gap: 8px;
}

.legend-item--hidden {
  opacity: 0.35;
}

.legend-swatch {
  width: 14px;
  height: 14px;
  border-radius: 2px;
  flex-shrink: 0;
  border: none;
  padding: 0;
  cursor: pointer;
  transition: outline 0.1s;
}

.legend-swatch:hover {
  outline: 2px solid var(--gray-a11);
}

.legend-number {
  text-align: right;
  margin-left: auto;
  font-size: 10px;
  color: var(--ui-text-muted);
}

/* ---------------------------------------------------------------------------
   Clipping controls
   --------------------------------------------------------------------------- */
.clipping-controls {
  display: grid;
  row-gap: 4px;
}

/* ---------------------------------------------------------------------------
   Range slider (multi-thumb)
   --------------------------------------------------------------------------- */
.clip-row {
  display: flex;
  align-items: center;
  gap: 6px;
  width: 176px;
}

.clip-axis-label {
  font-size: 10px;
  color: var(--ui-text-muted);
  text-transform: uppercase;
  width: 10px;
  flex-shrink: 0;
  text-align: center;
}

.clip-range-slider {
  flex: 1;
  position: relative;
  height: 20px;
}

.range-track {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  left: 0;
  right: 0;
  height: 4px;
  background: var(--ui-track);
  border-radius: 2px;
}

.range-track-zone {
  position: absolute;
  top: -8px;
  bottom: -8px;
  left: 0;
  right: 0;
  cursor: pointer;
}

.range-select {
  position: absolute;
  top: 8px;
  bottom: 8px;
  left: var(--range-min, 0%);
  right: calc(100% - var(--range-max, 100%));
  background: var(--ui-accent);
  border-radius: 2px;
  cursor: grab;
  overflow: visible;
}

/* https://ishadeed.com/article/target-size/#extend-target-size-with-pseudo-elements */
.range-select:after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  transform: scale(1.5);
}

.range-select:active {
  cursor: grabbing;
}

.thumb {
  position: absolute;
  top: 50%;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--ui-thumb);
  box-shadow: 0 1px 4px rgba(0, 0, 0, 0.6);
  cursor: ew-resize;
  z-index: 1;
}

.thumb-min {
  left: 0;
  transform: translate(-50%, -50%);
}

.thumb-max {
  right: 0;
  transform: translate(50%, -50%);
}

.clip-range-output {
  font-size: 10px;
  color: var(--ui-text-dim);
  white-space: nowrap;
  min-width: 44px;
  text-align: right;
}

/* ---------------------------------------------------------------------------
   Checkbox items
   --------------------------------------------------------------------------- */
.checkbox-item {
  display: flex;
  align-items: center;
  gap: 9px;
  padding: 4px 0;
  cursor: pointer;
}

.checkbox-item label {
  cursor: pointer;
  user-select: none;
  color: var(--ui-text);
  font-size: 11px;
  line-height: 1.3;
}

.checkbox-item input[type="checkbox"] {
  appearance: none;
  -webkit-appearance: none;
  width: 14px;
  height: 14px;
  border: 1.5px solid var(--ui-border);
  border-radius: 3px;
  background: var(--gray-4);
  cursor: pointer;
  flex-shrink: 0;
  transition: background 0.15s, border-color 0.15s;
  position: relative;
  margin: 0;
}

.checkbox-item input[type="checkbox"]:checked {
  background: var(--ui-accent);
  border-color: var(--ui-accent);
}

.checkbox-item input[type="checkbox"]:checked::after {
  content: "";
  position: absolute;
  left: 3px;
  top: 0px;
  width: 5px;
  height: 9px;
  border: 2px solid #fff;
  border-top: none;
  border-left: none;
  transform: rotate(45deg);
}

/* ---------------------------------------------------------------------------
   Fence diagram controls
   --------------------------------------------------------------------------- */
#fence-options {
  display: none;
}

#fence-options.visible {
  display: block;
}

.fence-section-label {
  font-size: 10px;
  color: var(--ui-text-muted);
  margin: 6px 0 3px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.fence-lines {
  display: flex;
  flex-wrap: wrap;
  gap: 4px;
  margin-bottom: 4px;
}

.fence-tag {
  padding: 2px 6px;
  white-space: nowrap;
}

.fence-width-row {
  display: flex;
  align-items: center;
  gap: 6px;
  margin-top: 8px;
}

.fence-width-row label {
  font-size: 11px;
  color: var(--ui-text-muted);
  flex-shrink: 0;
}

.fence-width-row input[type=range] {
  flex: 1;
  accent-color: var(--ui-accent);
}

#fence-width-val {
  font-size: 11px;
  width: 32px;
  text-align: right;
  color: var(--ui-text-secondary);
}

/* ---------------------------------------------------------------------------
   Labeled slider (basemap opacity, vert. exag., voxel opacity)
   --------------------------------------------------------------------------- */
.labeled-slider {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.labeled-slider label {
  color: var(--ui-text-secondary);
  white-space: nowrap;
}

.labeled-slider input[type="range"] {
  -webkit-appearance: none;
  appearance: none;
  width: 100%;
  height: 4px;
  border-radius: 2px;
  background: var(--ui-track);
  outline: none;
  cursor: pointer;
}

.labeled-slider input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--ui-thumb);
  box-shadow: 0 1px 4px rgba(0, 0, 0, 0.6);
}

.labeled-slider input[type="range"]::-moz-range-thumb {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  border: none;
  background: var(--ui-thumb);
  box-shadow: 0 1px 4px rgba(0, 0, 0, 0.6);
}

.slider-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.slider-value {
  font-size: 10px;
  color: var(--ui-text-secondary);
  min-width: 28px;
  text-align: right;
}