body{margin:0;overflow:hidden;background-color:#000;display:flex;flex-direction:column;align-items:center;font-family:Arial,sans-serif}canvas{margin:0;display:block}.controls{position:fixed;top:10px;padding:10px;background-color:#000000b3;border-radius:5px;color:#0f0;z-index:1000}button{background-color:#040;color:#0f0;border:1px solid #00ff00;border-radius:3px;padding:5px 10px;margin:0 5px;cursor:pointer;transition:background-color .3s}button:hover{background-color:#060}