.game {
    background: #fff;
    padding: 2rem 0;
    text-align: center;
}

#pongCanvas {
    background-color: #f4f4f4;
    display: block;
    margin: 1rem auto;
    border: 1px solid #ddd;
    box-shadow: 0 0 10px rgba(0,0,0,0.1);
}