/* Audio node (加载音频). Local-only asset card with native playback controls. */

.canvas-node-audio_asset .canvas-node-body {
  grid-template-rows: minmax(0, 1fr);
  align-content: stretch;
}

/* Empty state */

.canvas-audio-empty {
  width: 100%;
  height: 100%;
  min-height: 0;
  display: grid;
  place-items: center;
  pointer-events: none;
}

.canvas-audio-upload {
  width: 100%;
  height: 100%;
  min-height: 0;
  display: grid;
  place-content: center;
  justify-items: center;
  gap: 4px;
  border: 1px dashed var(--canvas-border-strong);
  border-radius: var(--canvas-radius);
  background: var(--canvas-surface-soft);
  color: var(--canvas-text-soft);
  cursor: pointer;
  font: inherit;
  pointer-events: auto;
  transition: border-color var(--canvas-motion-fast), background var(--canvas-motion-fast), color var(--canvas-motion-fast);
}

.canvas-audio-upload-mark {
  width: 34px;
  height: 34px;
  display: grid;
  place-items: center;
  border-radius: 50%;
  background: var(--canvas-brand-soft);
  color: var(--canvas-accent);
  font-size: 17px;
  line-height: 1;
}

.canvas-audio-upload-text {
  font-size: 13px;
  font-weight: 800;
  color: var(--canvas-text);
}

.canvas-audio-upload-hint {
  font-size: 11px;
  color: var(--canvas-text-muted);
}

.canvas-audio-upload:hover,
.canvas-audio-upload:focus-visible {
  outline: none;
  border-color: rgba(168, 85, 247, 0.6);
  background: var(--canvas-surface-hover);
  box-shadow: var(--canvas-focus-ring);
}

/* Loaded state */

.canvas-audio-card {
  width: 100%;
  height: 100%;
  min-height: 0;
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 10px;
  box-sizing: border-box;
  padding: 12px;
  border: 1px solid var(--canvas-border);
  border-radius: var(--canvas-radius);
  background: var(--canvas-surface-soft);
  transition: border-color var(--canvas-motion), background var(--canvas-motion);
}

.canvas-audio-card.is-playing {
  border-color: rgba(168, 85, 247, 0.5);
  background: var(--canvas-surface-active);
}

.canvas-audio-card.is-drop-target {
  border-color: var(--canvas-accent);
  border-style: dashed;
  background: var(--canvas-brand-soft);
}

.canvas-audio-card.is-failed {
  border-color: rgba(248, 113, 113, 0.5);
  background: rgba(248, 113, 113, 0.08);
}

.canvas-audio-card-head {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: center;
  gap: 10px;
  min-width: 0;
}

.canvas-audio-mark {
  width: 30px;
  height: 30px;
  display: grid;
  place-items: center;
  border-radius: 50%;
  background: var(--canvas-brand-soft);
  color: var(--canvas-accent);
  font-size: 15px;
  line-height: 1;
}

.canvas-audio-card.is-playing .canvas-audio-mark {
  background: rgba(168, 85, 247, 0.28);
  color: #fff;
}

.canvas-audio-card-meta {
  min-width: 0;
  display: grid;
  gap: 2px;
}

.canvas-audio-name {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  font-size: 13px;
  font-weight: 800;
  color: var(--canvas-text);
}

.canvas-audio-sub {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 11px;
  color: var(--canvas-text-muted);
}

.canvas-audio-sub em {
  font-style: normal;
  color: var(--canvas-text-muted);
  opacity: 0.7;
}

.canvas-audio-actions {
  display: flex;
  align-items: center;
  gap: 4px;
}

.canvas-audio-action {
  width: 24px;
  height: 24px;
  display: grid;
  place-items: center;
  border: 1px solid var(--canvas-border);
  border-radius: var(--canvas-radius-sm);
  background: transparent;
  color: var(--canvas-text-soft);
  cursor: pointer;
  font: inherit;
  font-size: 13px;
  line-height: 1;
  transition: border-color var(--canvas-motion-fast), color var(--canvas-motion-fast), background var(--canvas-motion-fast);
}

.canvas-audio-action:hover,
.canvas-audio-action:focus-visible {
  outline: none;
  border-color: rgba(168, 85, 247, 0.55);
  background: var(--canvas-surface-hover);
  color: var(--canvas-text);
}

.canvas-audio-element {
  width: 100%;
  height: 36px;
  min-width: 0;
  border-radius: var(--canvas-radius-sm);
  background: rgba(0, 0, 0, 0.28);
  color-scheme: dark;
}

.canvas-audio-reselect {
  justify-self: start;
  padding: 6px 10px;
  border: 1px solid var(--canvas-border-strong);
  border-radius: var(--canvas-radius-sm);
  background: var(--canvas-surface-hover);
  color: var(--canvas-text);
  cursor: pointer;
  font: inherit;
  font-weight: 700;
  transition: border-color var(--canvas-motion-fast), background var(--canvas-motion-fast);
}

.canvas-audio-reselect:hover,
.canvas-audio-reselect:focus-visible {
  outline: none;
  border-color: rgba(168, 85, 247, 0.6);
  background: var(--canvas-brand-soft);
}

/* Playback equalizer: hidden until CanvasAudioService marks the card playing. */

.canvas-audio-bars {
  display: none;
  align-items: flex-end;
  gap: 2px;
  height: 12px;
}

.canvas-audio-card.is-playing .canvas-audio-mark-glyph {
  display: none;
}

.canvas-audio-card.is-playing .canvas-audio-bars {
  display: inline-flex;
}

.canvas-audio-card.is-playing .canvas-audio-bars i {
  animation: canvas-audio-bar 900ms ease-in-out infinite;
}

.canvas-audio-bars i {
  width: 2px;
  height: 4px;
  border-radius: 1px;
  background: currentColor;
  transform-origin: bottom;
}

.canvas-audio-bars i:nth-child(2) { animation-delay: 120ms; }
.canvas-audio-bars i:nth-child(3) { animation-delay: 240ms; }
.canvas-audio-bars i:nth-child(4) { animation-delay: 360ms; }

@keyframes canvas-audio-bar {
  0%, 100% { height: 4px; }
  50% { height: 12px; }
}

@media (prefers-reduced-motion: reduce) {
  .canvas-audio-card,
  .canvas-audio-upload,
  .canvas-audio-action,
  .canvas-audio-reselect {
    transition: none;
  }

  .canvas-audio-card.is-playing .canvas-audio-bars i {
    animation: none;
  }
}