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

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

canvas {
    background: #111;
    border: 2px solid #fff;
    box-shadow: 0 0 20px #222;
}