body {
	margin: 0;
	padding: 0;
}
header {
	font-family: arial;

	background-image: url(https://unsplash.imgix.net/photo-1414490929659-9a12b7e31907); 
	height: 100vh;
	background-size: cover;

	display: flex;
	flex-direction: column;
	justify-content: center;
	align-items: center;
}