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%;
}