button{margin-bottom:10px}*{box-sizing:border-box}.app{position:relative;background-color:#fff;height:100vh}.chat{position:absolute;width:400px;height:100%;padding:10px;top:0;left:0}.chat-messages{display:flex;flex-direction:column;gap:10px}.chat-message{border-radius:10px;padding:10px}.chat-message.user{background-color:#f0f0f0}.chat-message.assistant{background-color:#e0e0e0}.chat-input{width:100%;height:100px}.game-canvas{position:absolute;object-fit:contain;width:calc(100% - 400px);height:100%;inset:0 0 0 400px}