/* Blocker interactive elements - scoped to not conflict with blog styles */
:root {
  --blocker-text-color: #1a1a1a;
  --blocker-bg-color: #fff;
  --blocker-muted-color: #666;
  --blocker-border-color: #e0e0e0;
  --blocker-canvas-bg: #f5f5f5;
}

/* Interactive figures */
figure.interactive {
  margin: 2rem 0;
  padding: 0;
}

.canvas-container {
  background: var(--blocker-canvas-bg);
  border-top: 1px solid var(--blocker-border-color);
  border-bottom: 1px solid var(--blocker-border-color);
  min-height: clamp(200px, 50vw, 400px);
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  padding: 0 clamp(0.5rem, 3vw, 2rem);
}

.canvas-container canvas {
  display: block;
  max-width: 100%;
  touch-action: pan-y pinch-zoom; /* Allow vertical scroll, capture horizontal for rotation */
  -webkit-user-select: none;
  user-select: none;
}

.canvas-container--small {
  min-height: clamp(180px, 40vw, 250px);
}

figure.interactive figcaption {
  font-size: 0.875rem;
  color: var(--blocker-muted-color);
  text-align: center;
  padding: 0.75rem 1.5rem;
}

/* Device-aware caption text */
figcaption .touch-hint { display: none; }
figcaption .mouse-hint { display: inline; }

@media (pointer: coarse) {
  figcaption .touch-hint { display: inline; }
  figcaption .mouse-hint { display: none; }
}

/* Device-aware controls */
.controls .mouse-only { display: block; }
.controls .touch-only { display: none; }

@media (pointer: coarse) {
  .controls .mouse-only { display: none; }
  .controls .touch-only { display: block; font-size: 0.875rem; color: var(--blocker-muted-color); }
}

/* Controls */
.controls {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem 2rem;
  justify-content: center;
  align-items: center;
  padding: 0.5rem 1.5rem;
  background: var(--blocker-canvas-bg);
  border-bottom: 1px solid var(--blocker-border-color);
}

/* Author styles can override the UA [hidden] rule (e.g. .nav-btn display:flex). */
.controls [hidden] {
  display: none !important;
}

#viz-intro-cube [hidden] {
  display: none !important;
}

#intro-explode {
  width: clamp(140px, 28vw, 220px);
  margin: 0;
}

#intro-reassemble {
  position: absolute;
  top: 12px;
  right: 12px;
  width: 38px;
  height: 38px;
  padding: 0;
  border: 1px solid #d6d6d6;
  border-radius: 50%;
  background: linear-gradient(to bottom, rgba(255,255,255,0.96), rgba(245,245,245,0.96));
  box-shadow: 0 2px 6px rgba(0,0,0,0.12);
  font-size: 1.15rem;
  font-weight: 600;
  line-height: 1;
  color: #2d2d2d;
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 4;
  cursor: pointer;
  transition: transform 0.15s ease, box-shadow 0.15s ease, background 0.15s ease;
  touch-action: manipulation;
}

#intro-reassemble:hover {
  background: linear-gradient(to bottom, #ffffff, #ededed);
  box-shadow: 0 3px 8px rgba(0,0,0,0.16);
}

#intro-reassemble:active {
  background: linear-gradient(to bottom, #ececec, #e2e2e2);
  transform: translateY(1px);
}

#intro-reassemble:focus-visible {
  outline: 2px solid #8a8a8a;
  outline-offset: 2px;
}

.controls label {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-size: 0.875rem;
  color: var(--blocker-muted-color);
}

.controls input[type="range"] {
  width: clamp(100px, 25vw, 180px);
  height: 6px;
  cursor: pointer;
  -webkit-appearance: none;
  appearance: none;
  background: #ddd;
  border-radius: 3px;
  outline: none;
}

.controls input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: linear-gradient(to bottom, #fff, #f0f0f0);
  box-shadow: 0 1px 3px rgba(0,0,0,0.15), 0 1px 2px rgba(0,0,0,0.1);
  cursor: pointer;
  transition: box-shadow 0.15s ease;
}

.controls input[type="range"]::-webkit-slider-thumb:hover {
  box-shadow: 0 2px 4px rgba(0,0,0,0.2), 0 1px 2px rgba(0,0,0,0.12);
}

.controls input[type="range"]::-moz-range-thumb {
  width: 18px;
  height: 18px;
  border: none;
  border-radius: 50%;
  background: linear-gradient(to bottom, #fff, #f0f0f0);
  box-shadow: 0 1px 3px rgba(0,0,0,0.15), 0 1px 2px rgba(0,0,0,0.1);
  cursor: pointer;
}

.controls select {
  font-size: 0.875rem;
  padding: 0.25rem 0.5rem;
  border: 1px solid var(--blocker-border-color);
  border-radius: 4px;
  background: var(--blocker-bg-color);
  cursor: pointer;
}

/* Solution navigation */
.solution-nav {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.75rem;
}

.solution-nav .nav-buttons {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

#solution-label,
#rotation-label,
#canonical-label {
  font-size: 0.9375rem;
  font-weight: 500;
  color: var(--blocker-text-color);
  text-align: center;
  white-space: nowrap;
}

.nav-btn {
  min-width: 36px;
  height: 36px;
  padding: 0 12px;
  border: none;
  border-radius: 6px;
  background: linear-gradient(to bottom, #fafafa, #f0f0f0);
  box-shadow: 0 1px 3px rgba(0,0,0,0.08), 0 1px 2px rgba(0,0,0,0.06), inset 0 1px 0 rgba(255,255,255,0.8);
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--blocker-text-color);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.15s ease;
  touch-action: manipulation; /* Disable double-tap zoom */
}

.nav-btn:hover {
  background: linear-gradient(to bottom, #fff, #f5f5f5);
  box-shadow: 0 2px 4px rgba(0,0,0,0.1), 0 1px 2px rgba(0,0,0,0.08), inset 0 1px 0 rgba(255,255,255,0.9);
}

.nav-btn:active {
  background: linear-gradient(to bottom, #eee, #e8e8e8);
  box-shadow: 0 1px 2px rgba(0,0,0,0.08), inset 0 1px 2px rgba(0,0,0,0.05);
  transform: translateY(1px);
}

/* Arrow buttons specifically */
.nav-btn[aria-label*="Previous"],
.nav-btn[aria-label*="Next"] {
  font-size: 1.125rem;
  padding: 0;
  width: 40px;
  height: 40px;
  flex-shrink: 0;
}

/* Playback controls (slider + play button) */
.playback-controls {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.playback-controls input[type="range"] {
  width: clamp(120px, 30vw, 200px);
}

/* Play button */
.play-btn {
  min-width: 36px;
  height: 36px;
  padding: 0;
  border: none;
  border-radius: 6px;
  background: linear-gradient(to bottom, #fafafa, #f0f0f0);
  box-shadow: 0 1px 3px rgba(0,0,0,0.08), 0 1px 2px rgba(0,0,0,0.06), inset 0 1px 0 rgba(255,255,255,0.8);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.15s ease;
  touch-action: manipulation; /* Disable double-tap zoom */
  position: relative;
}

/* Play triangle (CSS shape) */
.play-btn::before {
  content: '';
  display: block;
  width: 0;
  height: 0;
  border-style: solid;
  border-width: 6px 0 6px 10px;
  border-color: transparent transparent transparent var(--blocker-text-color);
  margin-left: 2px;
}

/* Pause bars */
.play-btn.is-playing::before {
  width: 4px;
  height: 12px;
  border: none;
  background: var(--blocker-text-color);
  margin-left: 0;
  box-shadow: 6px 0 0 var(--blocker-text-color);
}

.play-btn:hover {
  background: linear-gradient(to bottom, #fff, #f5f5f5);
  box-shadow: 0 2px 4px rgba(0,0,0,0.1), 0 1px 2px rgba(0,0,0,0.08), inset 0 1px 0 rgba(255,255,255,0.9);
}

.play-btn:active {
  background: linear-gradient(to bottom, #eee, #e8e8e8);
  box-shadow: 0 1px 2px rgba(0,0,0,0.08), inset 0 1px 2px rgba(0,0,0,0.05);
  transform: translateY(1px);
}

/* WebGL fallback images */
.canvas-container .fallback-image {
  display: none;
  max-width: 100%;
  height: auto;
}

.canvas-container.webgl-unavailable canvas {
  display: none;
}

.canvas-container.webgl-unavailable .fallback-image {
  display: block;
}

.canvas-container.webgl-unavailable + .controls {
  display: none;
}

.canvas-container.webgl-unavailable ~ figcaption.interactive-hint {
  display: none;
}

/* Reduce motion for accessibility */
@media (prefers-reduced-motion: reduce) {
  .canvas-container canvas,
  .nav-btn,
  .play-btn,
  .controls input[type="range"]::-webkit-slider-thumb {
    transition: none;
  }
}

/* Responsive */
@media (max-width: 600px) {
  figure.interactive {
    margin: 1rem 0;
  }

  .canvas-container {
    padding: 0 0.5rem;
  }

  .controls {
    gap: 0.75rem;
    padding: 0.75rem 1rem;
  }

  .controls input[type="range"] {
    width: clamp(80px, 25vw, 120px);
  }

  #intro-explode {
    width: clamp(120px, 42vw, 180px);
  }

  #intro-reassemble {
    width: 36px;
    height: 36px;
    top: 10px;
    right: 10px;
    font-size: 1.05rem;
  }

  .controls label {
    font-size: 0.75rem;
    gap: 0.5rem;
  }

  .nav-btn {
    min-width: 36px;
    height: 36px;
    padding: 0 8px;
  }

  .nav-btn[aria-label*="Previous"],
  .nav-btn[aria-label*="Next"] {
    width: 36px;
    height: 36px;
  }

  #solution-label,
  #rotation-label,
  #canonical-label {
    font-size: 0.8125rem;
    min-width: 100px;
  }

  figure.interactive figcaption {
    font-size: 0.75rem;
    padding: 0.5rem 1rem;
  }
}