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

#game-container {
    box-shadow: 0 0 10px rgba(255, 255, 255, 0.2);
}