<!DOCTYPE html>
<html>
<head>
<style type='text/css'>
body {
background: #EEE;
color: black;
}
#root {
background: #FFFFFF;
color: #000000;
margin: 0 auto;
width: 1008px;
}
</style>
</head>
<body>
<body>
<div id="root">all content</div>
</body>
</body>
</html>