div.main-body {
	display: grid;
	grid-template-columns: minmax(300px , auto)1fr;
	grid-template-areas: "navbar mainContent";
	grid-gap: 20px;
}

nav#navbar {
	grid-area: navbar;
	position: fixed;
}

nav#navbar a {
	display: block;
	border: 1px solid black;
	padding: 5px;
	margin: 10px 0;
	text-decoration: none;
	color: black;
}

main#main-doc {
	grid-area: mainContent;
}

header {
	font-size: 1.5rem;
	font-weight: bold;
}

code {
	background-color: #CCC;
	display: block;
	padding: 20px;
}


@media screen and (max-width: 400px) {
        div.main-body {
            display: flex;
            flex-direction: column;
            column-gap: 46px;
        }
        nav#navbar {
            position: relative;
        }
}