body {
    margin: 0;
    padding: 0;
    background-color: #2c3e50;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
}

#game-container {
    width: 800px;
    height: 600px;
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.5);
}