body {
   background-repeat: no-repeat;
   background-position: center center;
   background-image: url(../images/autonomo.jpg);
   background-size: cover;
   font-family: Arial, Helvetica, sans-serif;
   min-height: 100%;
}

html,
body {
   margin: 0;
   padding: 0;
   overflow: hidden
}

img {
   position: fixed;
   top: 0;
   left: 0;
   height: 100%;
   width: 100%;
}