body{font-family:sans-serif;background:#111;color:#eee;display:flex;justify-content:center;align-items:center;height:100vh;margin:0}.app-container{width:80%;max-width:800px}.drop-zone{border:2px dashed #666;padding:40px;border-radius:12px;text-align:center}.drop-zone.dragover{border-color:#4caf50;background:#4caf501a}video{width:100%;margin-top:20px;border-radius:8px;background:#000}.settings,.history{margin-top:20px;padding:10px;background:#222;border-radius:8px}.settings input{width:60px;margin-left:10px}.history ul{list-style:none;padding:0}.history li{background:#333;margin:5px 0;padding:5px 10px;border-radius:6px}button{margin-top:10px;padding:6px 12px;border:none;border-radius:6px;cursor:pointer;background:#e53935;color:#fff}button:hover{background:#c62828}