/* ==========================================================================
   visualizations.css — Canvas containers, controls, sliders, toggles
   ========================================================================== */

/* --- Visualization Container --- */
.viz-container {
  width: 100%;
  background: var(--bg-card);
  border-radius: var(--radius-lg);
  overflow: hidden;
  position: relative;
  margin: 1.5rem 0;
  border: 1px solid rgba(255, 255, 255, 0.04);
}

/* --- Canvas --- */
.viz-container canvas {
  width: 100%;
  display: block;
  height: auto;
  background: transparent;
}

/* Fallback image for print / no-JS */
.canvas-fallback {
  display: none;
  width: 100%;
}

/* --- Loading / Skeleton State --- */
.viz-container.loading {
  min-height: 300px;
}

.viz-container.loading::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(
    90deg,
    var(--bg-card) 0%,
    rgba(255, 255, 255, 0.03) 40%,
    rgba(255, 255, 255, 0.06) 50%,
    rgba(255, 255, 255, 0.03) 60%,
    var(--bg-card) 100%
  );
  background-size: 200% 100%;
  animation: skeleton-pulse 1.8s ease-in-out infinite;
  border-radius: var(--radius-lg);
}

@keyframes skeleton-pulse {
  0% {
    background-position: 200% 0;
  }
  100% {
    background-position: -200% 0;
  }
}

/* --- Visualization Title / Caption --- */
.viz-title {
  padding: 1rem 1.25rem 0;
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--text-primary);
}

.viz-caption {
  padding: 0.5rem 1.25rem 0;
  font-size: 0.75rem;
  color: var(--text-secondary);
  line-height: 1.5;
}

/* ==========================================================================
   Visualization Controls
   ========================================================================== */
.viz-controls {
  padding: 1rem 1.25rem 1.25rem;
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  align-items: flex-end;
  border-top: 1px solid rgba(255, 255, 255, 0.04);
}

/* --- Control Groups --- */
.control-group {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  min-width: 0;
}

.control-group.horizontal {
  flex-direction: row;
  align-items: center;
  gap: 0.75rem;
}

.control-label {
  font-size: 0.6875rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-secondary);
  white-space: nowrap;
}

.control-value {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--accent-highlight);
  min-width: 3.5ch;
  text-align: right;
}

/* --- Slider Row (label + slider + value) --- */
.slider-row {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

/* ==========================================================================
   Custom Range Slider
   ========================================================================== */
input[type="range"] {
  -webkit-appearance: none;
  appearance: none;
  width: 100%;
  height: 4px;
  background: rgba(255, 255, 255, 0.1);
  border-radius: 2px;
  outline: none;
  cursor: pointer;
  min-width: 100px;
}

/* Track — Webkit */
input[type="range"]::-webkit-slider-runnable-track {
  height: 4px;
  background: rgba(255, 255, 255, 0.1);
  border-radius: 2px;
}

/* Thumb — Webkit */
input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 18px;
  height: 18px;
  background: var(--accent-primary);
  border-radius: 50%;
  border: 2px solid var(--bg-card);
  margin-top: -7px;
  cursor: pointer;
  transition: box-shadow var(--transition-fast),
              transform var(--transition-fast);
  /* 44px touch target via padding trick */
  box-shadow: 0 0 0 10px transparent;
}

input[type="range"]::-webkit-slider-thumb:hover {
  transform: scale(1.15);
  box-shadow: 0 0 0 6px rgba(129, 140, 248, 0.15);
}

input[type="range"]:focus-visible::-webkit-slider-thumb {
  box-shadow: 0 0 0 4px rgba(129, 140, 248, 0.3);
}

/* Track — Firefox */
input[type="range"]::-moz-range-track {
  height: 4px;
  background: rgba(255, 255, 255, 0.1);
  border-radius: 2px;
  border: none;
}

/* Thumb — Firefox */
input[type="range"]::-moz-range-thumb {
  width: 18px;
  height: 18px;
  background: var(--accent-primary);
  border-radius: 50%;
  border: 2px solid var(--bg-card);
  cursor: pointer;
  transition: box-shadow var(--transition-fast),
              transform var(--transition-fast);
}

input[type="range"]::-moz-range-thumb:hover {
  transform: scale(1.15);
  box-shadow: 0 0 0 6px rgba(129, 140, 248, 0.15);
}

input[type="range"]:focus-visible::-moz-range-thumb {
  box-shadow: 0 0 0 4px rgba(129, 140, 248, 0.3);
}

/* Progress fill (Firefox only) */
input[type="range"]::-moz-range-progress {
  height: 4px;
  background: var(--accent-primary);
  border-radius: 2px;
}

/* Touch target padding for mobile */
@media (pointer: coarse) {
  input[type="range"] {
    height: 6px;
    padding: 14px 0;
  }

  input[type="range"]::-webkit-slider-thumb {
    width: 24px;
    height: 24px;
    margin-top: -9px;
  }

  input[type="range"]::-moz-range-thumb {
    width: 24px;
    height: 24px;
  }
}

/* ==========================================================================
   Buttons
   ========================================================================== */
.viz-btn {
  padding: 0.45rem 1rem;
  background: var(--bg-secondary);
  border: 1px solid rgba(129, 140, 248, 0.3);
  border-radius: var(--radius-md);
  color: var(--text-primary);
  font-size: 0.8125rem;
  font-weight: 500;
  cursor: pointer;
  transition: background var(--transition-fast),
              border-color var(--transition-fast),
              color var(--transition-fast);
  white-space: nowrap;
}

.viz-btn:hover {
  background: rgba(129, 140, 248, 0.1);
  border-color: var(--accent-primary);
}

.viz-btn:active {
  background: rgba(129, 140, 248, 0.15);
}

.viz-btn:focus-visible {
  outline: 2px solid var(--accent-primary);
  outline-offset: 2px;
}

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

.viz-btn.primary:hover {
  background: #6366F1;
  border-color: #6366F1;
}

/* Play / Pause */
.viz-btn.play-pause {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
}

/* Reset */
.viz-btn.reset {
  border-color: rgba(255, 255, 255, 0.1);
  color: var(--text-secondary);
}

.viz-btn.reset:hover {
  border-color: rgba(255, 255, 255, 0.2);
  color: var(--text-primary);
}

/* ==========================================================================
   Toggle Button Group (GD / SGD / Adam etc.)
   ========================================================================== */
.toggle-group {
  display: inline-flex;
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-md);
  overflow: hidden;
}

.toggle-btn {
  padding: 0.4rem 0.85rem;
  background: transparent;
  border: none;
  border-right: 1px solid rgba(255, 255, 255, 0.06);
  color: var(--text-secondary);
  font-size: 0.75rem;
  font-weight: 500;
  cursor: pointer;
  transition: background var(--transition-fast),
              color var(--transition-fast);
  white-space: nowrap;
}

.toggle-btn:last-child {
  border-right: none;
}

.toggle-btn:hover {
  background: rgba(255, 255, 255, 0.04);
  color: var(--text-primary);
}

.toggle-btn.active {
  background: var(--accent-primary);
  color: #fff;
}

.toggle-btn:focus-visible {
  outline: 2px solid var(--accent-primary);
  outline-offset: -2px;
}

/* Touch-friendly toggles */
@media (pointer: coarse) {
  .toggle-btn {
    padding: 0.55rem 1rem;
    font-size: 0.8125rem;
  }
}

/* ==========================================================================
   Responsive Controls
   ========================================================================== */
@media (max-width: 640px) {
  .viz-controls {
    flex-direction: column;
    align-items: stretch;
    gap: 0.85rem;
    padding: 0.85rem 1rem 1rem;
  }

  .control-group {
    width: 100%;
  }

  .control-group.horizontal {
    flex-wrap: wrap;
  }

  .slider-row {
    width: 100%;
  }

  .toggle-group {
    width: 100%;
    display: flex;
  }

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

  .viz-btn {
    width: 100%;
    text-align: center;
    padding: 0.55rem 1rem;
  }
}

@media (max-width: 1024px) {
  .viz-container {
    border-radius: var(--radius-md);
  }
}