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

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

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;
}

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