#demo-game-container{max-width:800px;margin:0 auto;padding:20px}.game-button{display:inline-block;padding:10px 20px;margin:10px;background-color:#007bff;color:#fff;border:none;border-radius:5px;cursor:pointer;font-size:16px}.game-button:hover{background-color:#0056b3}#game-iframe{width:100%;min-height:100vh}#game-iframe iframe{width:100%;height:100vh}