html, body {
	height: 100%;
	margin: 0;
	padding: 0;
}
body {
	display: flex;
	flex-direction: column;
	font: 100% sans-serif;
	background-color: white;
}
header {
	margin: 0;
	padding: 0.5ex 2em;
	background-color: #B0B0B0;
}
main {
	flex: 1 0 auto;
}
footer {
	flex-shrink: 0;
	margin: 0;
	padding: 0.5ex 2em;
	color: white;
	background-color: #562fb5;
}