section#page-content{margin:20px auto}section#main-column{-moz-box-sizing:border-box;-webkit-box-sizing:border-box;box-sizing:border-box;display:inline-block;vertical-align:top;margin-right:-4px;width:600px}aside#aside-column{-moz-box-sizing:border-box;-webkit-box-sizing:border-box;box-sizing:border-box;display:inline-block;vertical-align:top;width:300px;margin:0 -4px 20px 20px}