html {
    font-family: "FreeSerif", serif;
}

h1, h2, h3, h4, h5, h6 {
    font-family: "FreeSans", sans;
}

header h1.title {
    display: block;
    text-align: center;
    font-family: "FreeSans", sans;
    font-size: 200%;
}

header h2.author {
    display: block;
    text-align: center;
    font-family: "FreeSans", sans;
    font-size: 150%;
}


header h3.date {
    display: block;
    text-align: center;
    font-family: "FreeSans", sans;
    font-size: 150%;
}

pre {
    margin-left: 4em;
}