html, body { margin: 0; padding: 0; width: 100%; height: 100%; }

body {
  background-image: url('images/ALSAM-invert.gif');
  background-repeat: no-repeat;
  background-attachment: fixed;
  background-position: center;
  background-color: #000000;
  }
  
  a { display: block; width: 100%; height: 100%; }