body {
    margin: 0;

    background-color: black;
    color: gray;

    text-align: center;
    font-size: 2em;
}

p {
    margin: 0.5em;
}

a {
    color: darkcyan;
}

a.back {
    margin-right: 1em;
}

a.next {
    margin-left: 1em;
}

pre {
    white-space: pre-wrap; /* Since CSS 2.1 */
    white-space: -moz-pre-wrap; /* Mozilla, since 1999 */
    white-space: -pre-wrap; /* Opera 4-6 */
    white-space: -o-pre-wrap; /* Opera 7 */
    word-wrap: break-word; /* Internet Explorer 5.5+ */
}