#loading {

  /* (A1) COVER FULL PAGE */

  position: fixed;

  top: 0; left: 0; z-index: 999;

  width: 100vw; height: 100vh;



  /* (A2) SPINNER IMAGE */

  background-color: black;

  background-image: url("ajax-loader.gif");

  background-position: center;

  background-repeat: no-repeat;

}

