JSFiddle - React, Tailwind, and code Playground

by reorx

HTML

<div id="container">

<div id="sidebar">
</div>
<div id="main">
</div>

</div>

CSS

#container {
    width: 500px;
    margin: 0 auto;
    margin-top: 50px;
    position: relative;
}

#main {
    position: absolute;
    left: 0; top: 0; bottom: 0;
    right: 100px;
    height: 300px;
    background: #eee;
    box-shadow: 0 0 20px #f00;
    z-index: 9999;
}

#sidebar {
    position: absolute;
    right: 0; top: 0; bottom: 0;
    width: 100px;
    height: 300px;
    background: #aaa;
    z-index: -9999;
}