.dsp-demo-container{background-color:#f0f4f8;border:1px solid #d1d9e6;border-radius:8px;padding:20px;margin:20px 0}#waveformCanvas{background-color:#001f3f;border-radius:4px;width:100%;height:auto}.controls{margin-top:15px;display:flex;gap:10px}.controls button{display:inline-flex;align-items:center;justify-content:center;padding:10px 20px;border:none;border-radius:5px;cursor:pointer;font-size:16px;font-weight:700;color:#fff;transition:background-color .2s}.controls button svg{margin-right:8px}.controls button.play{background-color:#28a745}.controls button.play:hover{background-color:#218838}.controls button.stop{background-color:#dc3545}.controls button.stop:hover{background-color:#c82333}.controls button:disabled{background-color:#6c757d;cursor:not-allowed;opacity:.7}