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

h1 {
    margin-top: 30px;
    margin-bottom: 10px;
    letter-spacing: 2px;
}

#pong {
    background: #111;
    display: block;
    margin: 0 auto;
    border: 4px solid #fff;
    box-shadow: 0 0 30px #000a;
}