mark {
	background-color: rgba(0,0,0,0);
	font-family: monospace;
}

body {
	width: 85%;
	min-height: 100vh;
	margin: 0 auto;
	background-color: darkcyan;
}

html {
	background-color: darkmagenta;
}

header {
	display: flex;
	/* finalize properties */	
}

main {
	padding: 20px;
}

nav {
	text-align: center;
	/* link colors, too */
}
section {
	margin: 0px 10px;
}