#leftColumn { font-size: 1em; padding: 0.5em 0 0; width: 482px; margin-right: 16px; float: left; background: #fff; }
#rightColumn { padding: 0.5em 0 0; width: 482px; float: left; background: #fff; }

.back { border: 1px dotted #666; padding: 6px; width: 235px; background: #ffc; margin-top: 2.5em; }