body{
	margin:0;
}
#page1,
#page2,
#page3 {
	width:100%;
	height:100%;
	position:absolute;
	top:0;
	font-size:72px;
	color:white;
	display:none;
}

#page1{
	background-color:red;
}

#page2{
	background-color:green;
}

#page3{
	background-color:blue;
}

nav {
	position: absolute;
	text-align: center;
	bottom: 10px;
	width: 100%;
}