JSFiddle - React, Tailwind, and code Playground

HTML

<div id="outer">
  <div id="innerBlock">
    <span id="innerInline">Some text</span>
  </div>
</div>

CSS

div#outer { border: 4px solid black; }


div#innerBlock {
  padding: 2em;
  margin: 4em;
  border: 4px solid red;
}
span#innerInline { font-size: 1em;  }