body {
    font-family: Myriad Pro, Myriad, Arial, Helvetica, sans-serif;
    text-align: center;
    background-color: #ddf;
}

#content {
    width: 42em;
    text-align: left;

    background-color: white;

    margin-top: 1.2em;
    margin-bottom: 1.2em;
    margin-left: auto;
    margin-right: auto;

    padding: 2.5em;

    border: 1px solid black;
}

pre {
    margin-top: 1.5em;
    margin-bottom: 1.5em;
    margin-left: 2.5em;
    padding: 1em;
    background-color: #dee;
}