JSFiddle - React, Tailwind, and code Playground

CSS

body {
    background: #eee;
    margin: 0;
    padding: 0;
}

body:after {
    content: '';
    background: #fff;
    width: 800px;
    min-height: 100%;
    position: absolute;
    left: 50%;
    margin-left: -400px;
}