html, body{
  height: 100%;
}

body {
  background: #000 url('https://source.unsplash.com/user/michaelbaronr/1920x1080') no-repeat center center fixed;
  -webkit-background-size: cover;
  -moz-background-size: cover;
  background-size: cover;
  -o-background-size: cover;
}

nav p span{
	background: #fff;
	padding: 2px;
	font-family: "Courier New", Courier, monospace;
	font-size: 0.8em;
}