html {
	background: lightgray;
}

body {
	background: white;
	border: 1px solid black;
	font-family: 'Open Sans', sans-serif;
	margin: auto;
	max-width: 600px;
}

nav {
	background-color: black;
}

nav a {
	color: white;
}

main {
	margin: 0 20px;
}

h1 {
	text-align: center;
}

p {
	text-align: justify;
}

pre {
	font-size: 14px;
	overflow: auto;
}