JSFiddle - React, Tailwind, and code Playground

by Paco86

HTML

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

CSS

.outer {
  width: 400px;
  height: 400px;
  border: 1px solid #000;
  display: flex;
  align-items: center;
  justify-content: center;
}

.inner {
  width: 100px;
  height: 100px;
  border: 1px solid #000;
  
}