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

h1 {
    margin-top: 30px;
    font-size: 2em;
    letter-spacing: 2px;
}

#pong {
    display: block;
    margin: 40px auto;
    background: #111;
    box-shadow: 0 0 20px #0008;
    border-radius: 10px;
}