body{margin:0;overflow:hidden;background-color:#000;color:#fff;font-family:sans-serif}#app{position:relative;width:100vw;height:100vh}#game-canvas{display:block;width:100%;height:100%}#ui{position:absolute;top:10px;left:10px;z-index:10;background-color:#00000080;padding:10px;border-radius:5px}#multiplayer-controls input,#multiplayer-controls button{margin-right:5px;padding:5px}#multiplayer-controls p{margin:5px 0 0}