.wave-stage {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: stretch;
  gap: 16px;
  padding: 0 12px 16px;
}

.wave-canvas-wrap {
  width: min(100%, 960px);
  margin: 0 auto;
}

#wave-canvas {
  display: block;
  width: 100%;
  height: 180px;
  border-radius: 12px;
  touch-action: none;
  cursor: crosshair;
  background: var(--pure-black, #111);
  border: 1px solid var(--border);
}

.wave-presets {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  justify-content: center;
}

.wave-presets button {
  font-size: 13px;
  padding: 6px 12px;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: var(--surface-1);
  color: var(--text-1, inherit);
  cursor: pointer;
}

.wave-presets button:hover {
  border-color: var(--accent-primary, #1a73e8);
}

.wave-stage .piano-keyboard {
  width: min(100%, 960px);
  margin: 0 auto;
}