body{margin:0;padding:0;display:flex;justify-content:center;align-items:center;min-height:100vh;background:linear-gradient(135deg,#667eea,#764ba2);font-family:Arial,sans-serif}canvas{border:2px solid #333;background:#2a2a2a;box-shadow:0 10px 30px #0000004d}#info{position:absolute;top:20px;left:20px;color:#fff;background:#000000b3;padding:15px;border-radius:8px;font-size:14px}#musicToggle{margin-top:10px;padding:5px 10px;background:#667eeacc;border:2px solid rgba(255,255,255,.3);border-radius:5px;color:#fff;cursor:pointer;font-size:12px;transition:all .2s}#musicToggle:hover{background:#667eea;border-color:#fff9}#musicToggle.playing{background:#4caf50cc}#musicToggle.playing:hover{background:#4caf50}