html,body{font-family:sans-serif;height:100%;margin:0;background-color:#000;color:#fff}header{position:relative;top:0;text-align:center;background-color:gray;padding:10px}footer{position:fixed;width:100%;bottom:0;text-align:center;background-color:gray;padding:10px}h2{font-family:Helvetica}a{text-decoration:none;color:#fff}.content{padding:20px 20px 100px}