JSFiddle - React, Tailwind, and code Playground

HTML

<div class="parent">
    <div class="child">
    </div>
</div>

CSS

.parent{
    position:relative;
    background:red;
    width:200px;
    height:40px;
}
.child{
    position:absolute;
    top:40px;
    left:30px;
    width:70px;
    height:70px;
    background:blue;
}