div.todo {
    margin: 1pc 4% 0pc 4%;
    padding: 0.5pc 0.5pc 0.5pc 0.5pc;
    background-color: #e0e0ff;
    border: 1px dashed red;
}

div.required .header {
    font-weight: bold;
}

div.challenge .header {
    font-style: italic;
}

div.required {
    background-color: #eeeeff;
}

div.challenge {
    background-color: #ffe0e0;
}

div.question {
    background-color: #e0e0ff;
}

pre.tty {
    font-family: monospace;
    margin: 1pc 4% 0pc 4%;
    padding: 0.5pc 0.5pc 0.5pc 0.5pc;
    border: 1px dashed #99aabb;
    background-color:#f5f5f5
}

blockquote {
    margin: 1pc 4% 0pc 4%;
    padding: 0.5pc 0.5pc 0.5pc 0.5pc;
    border: 1px dashed #99aabb;
    background-color:#f5f5f5
}

span.ttytype {
    color: green;
    font-family: monospace;
    font-weight: bold;
    white-space: nowrap;
}