#header { width: 50%; margin: 0 auto; font-size: 4em; }

#subheader { font-size: 1.5em; font-weight: bold; }
#body { margin: 2em auto; width: 50%; font-size: 1.25em; line-height: 1em; }

#body pre { padding: 5px; font-size: .68em !important; background: #e0e0e0; border: 1px solid green; width: 105%}