JSFiddle - React, Tailwind, and code Playground

HTML

<link rel="stylesheet" href="http://cdn.kendostatic.com/2012.1.322/styles/kendo.common.min.css">
<link rel="stylesheet" href="http://cdn.kendostatic.com/2012.1.322/styles/kendo.default.min.css">
<script src="http://cdn.kendostatic.com/2012.1.515/js/kendo.all.min.js"></script>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<title>Test</title>
<style type="text/css">
body
,html
{
    height: 100%;
    margin: 0;
    padding: 0;
    color: #FFF;
}

#header
{
    float: left;
    width: 100%;
    background: red;
}

#content
{
    height: 100%;
    overflow: auto;
    background: blue;
}

</style>
</head>
<body>

    <div id="content">
            <div id="header">
                            Header
                        <p>Header stuff</p>
            </div>
             <div id="subheader">
                            Header 2
                        <p>Header stuff</p>
            </div>
            <div id="Content">
                <p>Content stuff</p>
            </div>
    </div>

</body>
</html>