body {
	margin: 0px;
	background-color: rgb(120, 120, 120);
	display: flex;
	justify-content: center;
	font-family: sans-serif;
	height: 100%
}

article {
	width: 100%;
	max-width: 920px;
	min-height: 100%;
	background-color: rgb(220, 220, 220);
	padding: 20px;
	display: flex;
	flex-direction: column
}

#header {
	display: flex;
	align-items: center
}

#header::after {
	content: " ";
	margin-left: 10px;
	height: 1px;
	flex: 1;
	background-color: #000000
}