h1 {
    text-align: center;
}
h2 {
    text-align: center;
}
body {
    background-color: lightblue;
}
a:active {
    color: red;
}
td {
    vertical-align: top;
}
dt {
    font-style: italic;
    font-weight: bold;
    color: darkgreen;
}
dd {
    color: darkblue;
}
li {
    color: darkblue;
}
pre.textfile {
    font-family: monospace;
    color: black;
    background-color: white;
    border-style: inset;
}
pre.commandline {
    font-family: monospace;
    color: white;
    background-color: black;
    border-style: outset;
}