JSFiddle - React, Tailwind, and code Playground

HTML

<div id="top"></div>
<div id="middle"></div>
<div id="bottom"></div>

CSS

body{
    margin: 0px;
    padding: 0px;
    border: 0px;
}

#top{
    width: 100%;
    height: 30px;
    background: blue;
    position: absolute;
}

#bottom{
    width: 100%;
    height: 30px;
    background: yellow;
    position: absolute;
    bottom: 0px;
}

#middle{
    width: 30%;
    position: absolute;
    top: 30px;
    bottom: 30px;
    background: gray;
}