html{height:100%;}
body {
    background-color: #000;
    width: 100%;
    text-align: center;
}

.intro {
    margin: 50px auto 0 auto;
    text-align: center;
    color: #c0c0c0;
    font-family: arial, sans-serif;
    font-size: 18px;
    padding: 0 20px 30px 20px;
}

a, .intro a {
    color: lightyellow;
    text-decoration: underline;
}

#canvas {
    margin: 0 auto;
}