JSFiddle - React, Tailwind, and code Playground

HTML

<h2>Big Heading</h2>
<h3>Small(er) Heading</h3>
<hr />

CSS

h2 {
  font-size: 50px;
}

h3 {
  font-size: 30px;
}

h2, h3 {
  width: 50%;
  height: 60px;
  margin: 0;
  padding: 0;
  display: inline;
}