body{margin:0;overflow:hidden;font-family:Arial,sans-serif;color:#fff}#ui{position:absolute;top:10px;left:10px;z-index:10;background:#00000080;padding:10px;border-radius:5px}label,input,select,button{display:block;margin-bottom:10px}button{margin-top:10px}#canvas-container{width:100%;height:100%}