JSFiddle - React, Tailwind, and code Playground

HTML

<div id="formulario"></div>

CSS

#formulario {
    background:#000;
}

@media (max-width: 480px ) {
    #formulario {
        width: 200px;
        height: 200px;
    }
}

@media (min-width: 480px) and (max-width: 960px) {
    #formulario {
        width: 400px;
        height: 400px;
    }
}

@media (min-width: 960px) {
    #formulario {
        width: 600px;
        height: 600px;
    }    
}