:root{--bg: #000}body{margin:0;padding:0;background-color:var(--bg);overflow:hidden;width:100vw;height:100vh}#root{width:100%;height:100%}.game-container{width:100%;height:100%;display:flex;justify-content:center;align-items:center}.game-frame{width:100%;height:100%;border:none;outline:none}