JSFiddle - React, Tailwind, and code Playground

by denniswaltermartinez

HTML

<div class="container">
  <button class="a">Button A</button>
  <button class="b">Button B</button>
</div>

 <button class="b">Button B (outside)</button>

CSS

html {
  font-size: 62.5%;
}

body {
  font-size: 1.6rem;
}

.container {
  font-size: 5rem;
}

.container .a {
  font-size: 1.6rem;
}

.container .b {
  font-size: 1.6em;
}