body { text-align: center; padding: 0px; }
h1 { font-size: 40px; }
body { font: 20px Helvetica, sans-serif; color: #ffffff; }
article { display: block; text-align: center; width: 650px; margin: 0 auto; }
body, html { 
  background: url(core-keeper-home-1.jpg) no-repeat center center fixed; 
  -webkit-background-size: cover;
  -moz-background-size: cover;
  -o-background-size: cover;
  background-size: cover;
}