body {
	font-family: Arial;
	color: #333;
}

header, footer {
	text-align: center;
	padding: 40px 0;
	background: #DADADA;
}

nav ul {
	margin: 0;
	padding: 0;
	list-style-type: none;
	border-top: 2px solid #083073;
}

nav ul li a {
	display: block;
	background: #EDBB03;
	padding: 20px 10px;
	text-align: center;
	text-decoration: none;
	text-transform: uppercase;
	color: #fff;
	font-weight: bold;
	border-bottom: 2px solid #083073;
}
	
main {
	display: block;
	background-color: #F2F2F2;
	padding: 20px;
}	

@media only screen and (min-width: 600px) {
	
	#container { padding: 20px; display: flex; flex-wrap: wrap; }
	header, footer { flex: 100%; }
	nav { flex: 1; background-color: #F7E5A3; }
	main { flex: 2; }
}

@media only screen and (min-width: 1020px) {
	
	#container { width: 1020px; margin: auto; }
	main { flex: 3; display: flex; }
	main article:first-of-type { margin-right: 20px }	
}