example-two.css

html {
	font-family: sans-serif;
	background-color: grey;
}

body {
	width: 100%;
	max-width: 1200px;
	margin: 0 auto;
	background-color: #fff;
}

header {
	background: url('images/header.jpg') no-repeat center;
	height: 200px;
}

section {
	padding: 20px;
}

p {
	line-height: 1.5;
}

img {
	display: block;
	margin: 0 auto;
	max-width: 100%;
}