JSFiddle - React, Tailwind, and code Playground

HTML

<body>    
<div id="pagewrapper">
        <div id="header">
        </div> <!-- End of Header -->
        <div class="content-left">
            <span class="title">This is left Content</span>
        </div><!-- End of Content Left --><div class="content-right">
            <span class="title">This is Right Content</span>
        </div><!-- End of Content Right -->
        <div id="header-bot">
        </div> <!-- End of Header-Bot -->
        <div id="footer">
        </div> <!-- End of Footer -->
    </div> <!-- End of PageWrapper -->
</body>

CSS

body {
    margin: 80px 0 0;
}

#pagewrapper {
    width: 100%;
}

#header {
    width: 100%;
    height: 80px;
    background-color: #008B8B;
    position: fixed;
    top: 0;
}

.content-left, .content-right {
    width: 50%;
    height: 200px;
    color: #FFFFFF;    zoom: 1;
    display: table;
    text-align: center;
}

.content-left {
    float: left;
    background-color: #66CC99;
}

.content-right {
    float: right;
    background-color: #20B2AA;
}

#header-bot {
    height: 800px;
    background-color: #F8F8FF;
}

#footer {
    height: 50px;
    background-color: #AFEEEE;
}

.title {
    display: table-cell;
    font-size: 18px;
    vertical-align: middle;
}