JSFiddle - React, Tailwind, and code Playground

HTML

<div>
<span>AaGg</span>
</div>

<div>
<span class=big-font-size>AaGg</span>
</div>

<div class=big-font-size>
<span class=big-font-size>AaGg</span>
</div>

CSS

div {
	border: 1px dashed #f00;
	line-height: 0;
  margin: 100px 0;
  background: #ccc;
}
span {
	border: 1px solid;
}
.big-font-size {
	font-size: 100px;
}