#content {
width: 720px !important;
}

code {
font-size: 120%;
color: #C00;
background-color: inherit;
}

.answer code {
color: #000080;
background-color: inherit;
}

.answer {
color: #00F;
background-color: inherit;
}
.wrong {
text-decoration: line-through;
}
address {
margin: -20px 20px 20px 20px;
}