JSFiddle - React, Tailwind, and code Playground

HTML

<div class="outer">
  <div class="inner">
  </div>
</div>

CSS

.outer{
  width: 500px;
  height:500px;
  background-color:red;
  position:relative;
}

.inner{
  width: 300px;
  height:300px;
  background-color:blue;
  position:absolute;
}