/* ============================================================
   VISUALIZER SECTION
   ============================================================ */
.visualizer-section {
  background: var(--theme-surface);
  border: 1px solid var(--theme-border);
  border-radius: 10px;
  overflow: hidden;
}

/* Collapsible body — shown/hidden via [hidden] attribute toggled by JS */
.visualizer-body[hidden] { display: none; }

.visualizer-header {
  display: flex;
  align-items: center;
  gap: 0.625rem;
  padding: 0.5rem 0.875rem;
  border-bottom: 1px solid var(--theme-border);
  flex-wrap: wrap;
}

.source-buttons {
  display: flex;
  gap: 0.375rem;
  flex-wrap: wrap;
}

.mode-buttons {
  display: flex;
  gap: 0.375rem;
}

/* ---- Canvas ---- */
.canvas-container {
  position: relative;
  width: 100%;
  height: 160px;
  background: var(--theme-bg);
}

.visualizer-canvas {
  display: block;
  width: 100%;
  height: 100%;
}

.local-audio-wrap {
  display: none;
  gap: 0.5rem;
  padding: 0.625rem 0.875rem;
  border-top: 1px solid var(--theme-border);
  background: rgba(15, 23, 42, 0.35);
}

.local-audio-wrap.is-visible {
  display: grid;
}

.local-audio-label {
  font-size: 0.8125rem;
  color: var(--theme-text-muted);
}

.local-audio-file {
  color: var(--theme-text);
  font-size: 0.875rem;
}

.local-audio-player {
  width: 100%;
}

/* ---- Info banner (demo mode notice) ---- */
.visualizer-banner {
  padding: 0.4rem 0.875rem;
  background: rgba(245, 158, 11, 0.08);
  border-top: 1px solid rgba(245, 158, 11, 0.25);
  color: var(--theme-text-muted);
  font-size: 0.75rem;
  line-height: 1.4;
}

.visualizer-banner strong { color: var(--theme-warning); }

@media (max-width: 640px) {
  .visualizer-header {
    align-items: stretch;
    gap: 0.5rem;
  }

  .source-buttons,
  .mode-buttons {
    width: 100%;
  }

  .source-buttons .btn,
  .mode-buttons .btn {
    flex: 1 1 0;
  }

  .canvas-container { height: 180px; }
}