body {
    background-color: #bbbbbb;
}

div.documentwrapper, div.footer {
    width: 50em;
    margin-left: auto;
    margin-right: auto;
}

div.documentwrapper {
    border: 2px black solid;
    padding: 1em;
    background-color: #ffffff;
}

div.footer {
    margin-top: 0.5em;
    text-align: right;
}

a.headerlink, a.headerlink:hover, a.headerlink:active {
    display: none;
}

h1 {
    text-align: center;
}