/*
 * timeline.css
 * Multi-frame sequencer timeline, thumbnail filmstrip, and playback controls.
 */

.timeline-dock {
  height: 156px;
  background: rgba(14, 14, 20, 0.95);
  backdrop-filter: blur(16px);
  border-top: 1px solid var(--border-subtle);
  display: flex;
  flex-direction: column;
  z-index: 80;
  box-shadow: 0 -4px 24px rgba(0, 0, 0, 0.5);
}

/* Playback Control Bar */
.timeline-control-bar {
  height: 42px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 16px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
  background: rgba(10, 10, 14, 0.5);
}

.playback-buttons-group {
  display: flex;
  align-items: center;
  gap: 6px;
}

.playback-btn {
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  color: var(--text-primary);
  width: 32px;
  height: 32px;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all 0.15s ease;
}

.playback-btn:hover {
  background: var(--bg-hover);
  border-color: var(--border-highlight);
}

.playback-btn.danger-hover:hover {
  border-color: rgba(255, 68, 68, 0.7);
  color: #ff4444;
  background: rgba(255, 68, 68, 0.12);
  box-shadow: 0 0 10px rgba(255, 68, 68, 0.25);
}

.playback-btn.random-hover:hover {
  border-color: #a855f7;
  color: #c084fc;
  background: rgba(168, 85, 247, 0.12);
  box-shadow: 0 0 10px rgba(168, 85, 247, 0.25);
}

.control-bar-divider {
  width: 1px;
  height: 18px;
  background: rgba(255, 255, 255, 0.1);
  margin: 0 4px;
  flex-shrink: 0;
}

.playback-btn.play-btn {
  width: auto;
  padding: 0 14px;
  gap: 6px;
  background: linear-gradient(135deg, #ff2200, #b31000);
  border-color: #ff5533;
  color: #fff;
  font-weight: 600;
  font-size: 12px;
  box-shadow: 0 0 10px rgba(255, 34, 0, 0.3);
}

.playback-btn.play-btn.is-playing {
  background: linear-gradient(135deg, #ffaa00, #d47700);
  border-color: #ffcc44;
  box-shadow: 0 0 12px rgba(255, 170, 0, 0.4);
}

/* Timeline Filmstrip */
.timeline-filmstrip-wrapper {
  flex: 1;
  overflow-x: auto;
  overflow-y: hidden;
  padding: 10px 16px;
  display: flex;
  align-items: center;
}

.timeline-filmstrip-wrapper::-webkit-scrollbar {
  height: 6px;
}

.timeline-filmstrip-wrapper::-webkit-scrollbar-track {
  background: var(--bg-deep);
}

.timeline-filmstrip-wrapper::-webkit-scrollbar-thumb {
  background: var(--border-highlight);
  border-radius: 3px;
}

.timeline-filmstrip {
  display: flex;
  align-items: center;
  gap: 10px;
  min-width: max-content;
}

/* Frame Card */
.frame-card {
  width: 140px;
  height: 86px;
  background: #11111a;
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  padding: 6px 8px;
  cursor: pointer;
  transition: all 0.18s ease;
  position: relative;
}

.frame-card:hover {
  border-color: var(--border-highlight);
  background: #161622;
  transform: translateY(-2px);
}

.frame-card.active {
  border-color: var(--led-red);
  box-shadow: 0 0 12px rgba(255, 26, 0, 0.4);
  background: #181520;
}

.frame-card.dragging {
  opacity: 0.4;
}

.frame-card.drag-over {
  border-left: 3px solid var(--accent-cyan);
}

/* Frame Card Header */
.frame-card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-family: var(--font-mono);
  font-size: 10px;
}

.frame-index-badge {
  color: var(--text-secondary);
  font-weight: 600;
}

.frame-card.active .frame-index-badge {
  color: #ff5533;
}

.frame-duration-badge {
  background: rgba(255, 255, 255, 0.06);
  padding: 1px 5px;
  border-radius: 3px;
  color: var(--text-muted);
  cursor: pointer;
}

.frame-duration-badge:hover {
  background: rgba(0, 240, 255, 0.15);
  color: var(--accent-cyan);
}

/* Thumbnail Canvas */
.frame-thumbnail-canvas {
  width: 100%;
  height: 28px;
  border-radius: 3px;
  border: 1px solid #1f1f2e;
  image-rendering: pixelated;
}

/* Frame Card Footer Actions */
.frame-card-footer {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 4px;
}

.frame-action-btn {
  background: transparent;
  border: none;
  color: var(--text-muted);
  width: 20px;
  height: 20px;
  border-radius: 3px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all 0.12s ease;
}

.frame-action-btn:hover {
  background: var(--bg-hover);
  color: var(--text-primary);
}

.frame-action-btn.del-btn:hover {
  color: #ff4444;
}