JSFiddle - React, Tailwind, and code Playground

HTML

<div id="page">
    <div class="center">center column</div>
    <div class="leftcol">
        <div class="inner">left column</div>
    </div>
    <div class="rightcol">
        <div class="inner">right column</div>
    </div>
</div>

CSS

.leftcol, .rightcol {
    width: 50%;
    float: left;
}
.leftcol .inner {
    margin-right: 500px;
    height: 200px;
}
.rightcol .inner {
    margin-left: 500px;
    height: 200px;
}
.center {
    width: 1000px;
    margin: 0 auto -200px auto;
    background-color: #eee;
}
.inner {
    background-color: #fbb;
}