JSFiddle - React, Tailwind, and code Playground

HTML

<div class="sharesmenu">
     <h1>Pepe Corse</h1> 
</div>

CSS

@media only screen AND (max-width:600px) {
    .sharesmenu h1 {
        font-size:1em;
    }
}
@media only screen AND (min-width: 601px) {
    .sharesmenu h1 {
        font-size:2.2em;
    }
}