html {
	background-color: #111;
}
body {
	margin: 0 auto;
	padding: 0;
	max-width: 900px;
	background-color: #fff;
}
header, footer {
	border: 1px solid #777;
	padding: 1em;
	text-align: center;
	background-color: #747474;
}
header {
	padding-top: 0;
	margin-bottom: 1em;
}
footer {
	margin-top: 1em;
	color: #fff;
	line-height: 1.5;
}
footer a {
	color: #bdf;
}
nav {
	position: relative;
	margin-top: .5em;
	padding: .25em .5em;
	text-align: left;
	background-color: #ddd;
}

.message {
	margin-top: 2em;
	border-radius: 6px;
	padding: 1em;
	text-align: center;
	font-size: 1.1rem;
	background-color: #fff;
}