body  {
   background-color: #000;
   color: #ffffff;
   margin: 20px 0 0 0;
   border: none;
   text-align: center;
   width: auto;
   height: auto;
}

html { 
  background: url(images/lamp.jpg) no-repeat center center fixed; 
  -webkit-background-size: cover;
  -moz-background-size: cover;
  -o-background-size: cover;
  background-size: cover;
}
   
