.app{width:100vw;height:100vh;background-color:#fff;position:relative;overflow:hidden}.ball{width:50px;height:50px;background-color:#000;border-radius:50%;position:absolute;top:50%;transform:translateY(-50%);transition:none}.controls{position:fixed;bottom:20px;left:50%;transform:translate(-50%);display:flex;flex-direction:column;align-items:center;gap:15px;background:rgba(240,240,240,.9);padding:20px;border-radius:10px;box-shadow:0 2px 10px #0000001a}.play-pause-btn{background-color:#007aff;color:#fff;border:none;padding:12px 24px;font-size:16px;border-radius:8px;cursor:pointer;transition:background-color .2s}.play-pause-btn:hover{background-color:#0056cc}.play-pause-btn:active{background-color:#003d99}.speed-control{display:flex;flex-direction:column;align-items:center;gap:8px}.speed-control label{font-size:14px;font-weight:500;color:#333}.speed-control input[type=range]{width:150px;height:6px;background:#ddd;outline:none;border-radius:3px;cursor:pointer}.speed-control input[type=range]::-webkit-slider-thumb{-webkit-appearance:none;-moz-appearance:none;appearance:none;width:18px;height:18px;background:#007AFF;border-radius:50%;cursor:pointer}.speed-control input[type=range]::-moz-range-thumb{width:18px;height:18px;background:#007AFF;border-radius:50%;cursor:pointer;border:none}*{margin:0;padding:0;box-sizing:border-box}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,sans-serif;background-color:#fff;overflow:hidden}#root{width:100vw;height:100vh}