body{margin:0;background:#fff}.header-cont{width:100%;position:fixed;top:0}.header{height:223px;background:#fff;width:900px;margin:0 auto;background:url('Images/certificat-top-900px.jpg') no-repeat top center}.content{width:900px;background:#000 url('Images/certificat-mid-900px.jpg') repeat-y center;min-height:200px;margin:0 auto}.content-text{width:700px;background:#fff;margin:0 auto;padding-left:50px;padding-right:50px}.footer{height:133px;background:#fff;width:900px;margin:0 auto;background:url('Images/certificat-bottom-900px.jpg') no-repeat bottom center}table.cert_table{font-family:verdana,arial,sans-serif;font-size:13px;color:#333;border-width:1px;border-color:#666;border-collapse:collapse;width:500px}table.cert_table th{border-width:1px;padding:8px;border-style:solid;border-color:#666;background-color:#dedede;text-align:left;width:160px}table.cert_table td{border-width:1px;padding:8px;border-style:solid;border-color:#666;background-color:#fff}table.cert_table td.invalid{border-width:1px;padding:8px;border-style:solid;border-color:#666;background-color:red}h1,h3{text-align:center}table.cert_table{margin:0 auto;margin-bottom:18px}table:last-of-type{margin-bottom:34px}input[type="text"]{width:240px}