JSFiddle - React, Tailwind, and code Playground

HTML

<div class="outer">
  <div>1</div>
  <div>2</div>
</div>

CSS

.outer{
  border: 1px solid #000;
  display:flex;
  justify-content: center;
  padding: 3px;
}
.outer > div {
  border: 1px solid #000;
  margin:2px;
}