JSFiddle - React, Tailwind, and code Playground

HTML

<div id="box">
    CONTENT
</div>

CSS

html {
    display: table;
    width: 100%;
    height: 100%;
}
body {
    display: table-cell;
    text-align: center;
    vertical-align: middle;
    width: 100%;
    height: 100%;
}

#box {
    display: inline-block;
    background: #c00;
    font-size:500%;
    
}