body {
    background: #222;
    color: #fff;
    text-align: center;
    font-family: Arial, sans-serif;
    margin: 0;
    padding: 0;
}

#game-container {
    display: flex;
    justify-content: center;
    align-items: center;
    margin-top: 30px;
}

canvas {
    background: #111;
    border: 4px solid #fff;
    border-radius: 10px;
    display: block;
    box-shadow: 0 0 30px #000a;
}