body {
    background-color: #000;
    margin: 0;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    color: #fff;
    font-family: Arial, sans-serif;
}

#game-container {
    box-shadow: 0 0 20px rgba(0, 255, 0, 0.5);
}