* { margin:0; padding:0; } /* to remove the top and left whitespace */

html, body { width:100%; height:100%; } /* just to be sure these are full screen*/
body {
    margin: 0;
    background-color: #111;
  }
  .sf-snow-flake {
    position: fixed;
    top: -20px;
    z-index: 99999;
  }
  .sf-snow-anim {
    top: 110%;
  }