JSFiddle - React, Tailwind, and code Playground

HTML

<div>           
            <span>Hello!</span>
        </div>

CSS

div {
                height: 300px;
                width: 300px;
                line-height: 300px;
                background-color: aqua;     
                margin-bottom: 10px;
            }           
            div > span {                
                vertical-align: middle;
                background-color: orange;               
                font-size: 3em;
            }