body{margin:0;padding: 0;}

body.fullpage {
   margin: 0;
   padding: 0;
}
section.cover {
   display: block;
   text-align: center;
   height: 95%;
}
img#coverimage {
   height: 95%;
}

img#coverimage:only-of-type { /*overrides the previous setting, but only in newer systems that support CSS3 */
   height: 95vh;
}