#mat_background { position: absolute; left: 0px; top: 0px; }

h3 { margin-top: 2em; margin-bottom: -0.5em; font-weight: bold; }

#content_left {  position: absolute; left: 150px; top: 60px; width: 400px }

#content_right {  position: absolute; left: 580px; top: 60px; width: 400px }