html,body{margin:0;background-color:#525659}div.content{width:1120px;margin:auto}div.content div.advert-large-banner{margin:10px auto}div.content iframe.pdf-viewer{height:900px;width:800px;float:left}div.content div.ad-container{float:left}div.content div.ad-container div.external-advert{background-color:white;margin:0 10px 10px 10px}