div.required, div.challenge, div.question {
    margin-left: auto;
    margin-right: auto;
    margin-bottom: 1em;
    margin-top: 1em;
    width: 80%;
    background-color: #e0e0ff;
    padding-left: 1em;
    padding-right: 1em;
}

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

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

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

div.required {
    background-color: #e0e0ff;
    border: 1px solid #c0c0ff;
}

div.challenge {
    background-color: #ffe0e0;
    border: 1px solid #ffc0c0;
}

div.question {
    background-color: #e0e0ff;
    border: 1px solid #c0c0ff;
}

kbd {
  color: #007700;
  font-family: monospace;
  font-weight: bold;
}


.jump-hdr {
    position: fixed;
    top: 0px;
    right: -1em;
    background: #d0d0ff;
    border: 1px solid #b0b0ff;
    border-top: none;
    border-left: none;
    border-bottom-left-radius: 5px;
    padding: .5em;
    box-shadow: 3px 3px 5px rgba(0,0,0,0.5);
}

@media print {
    .jump-hdr {
	display: none;
    }
}

.jump-hdr div.jump-section {
    display: inline-block;
    position: relative;
    margin-right: 1em;
    padding: 0.2em;
    font-weight: bold;
    cursor: default;
}

.jump-hdr div.jump-section:hover {
    background: #e0e0ff;
    border-top-left-radius: 5px;
    border-top-right-radius: 5px;
}

.jump-hdr div.jump-section div.jump-drop {
    display: none;
}

.jump-hdr div.jump-section:hover div.jump-drop {
    display: block;
    position: absolute;
    top: 100%;
    right: 0px;
    background: #555;
    background: #e0e0ff;
    padding: 0.5em;
    border-radius: 5px;
    border-top-right-radius: 0px;
    box-shadow: 3px 3px 3px rgba(0,0,0,0.5);
}

.jump-hdr div.jump-section div.jump-drop > * {
    display: block;
    white-space: nowrap;
}

.jump-hdr div.jump-section div.jump-drop * {
    font-weight: normal;
    text-decoration: none;
}