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;
}

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

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

main {
    display: block;
    background-color: #F2F2F2;
    padding: 20px;
}

@media only screen and (min-width: 600px){
    /***** Layout rules go here *****/
    
#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) {
/***** Maximum sized layout rules go in here ****/
    
#container {
    width: 1020px; margin: auto;
}
main {
/* changes the proportion of nav to main*/
    flex: 3;
    
/* turns main into a flexbox */ 
    display: flex;
}
    
    main article:first-of-type {
    margin-right: 20px;
}
}