JSFiddle - React, Tailwind, and code Playground

HTML

<div id="first">
    <div id="second">TEST</div>
</div>

CSS

#first {
    margin:auto;
    width:100px;
    height:100px;
    background:red;
}

#second {
    margin-top:50px;
    width:50px;
    height:50px;
    background:yellow;
}