JSFiddle - React, Tailwind, and code Playground

HTML

<div>
<form>
    <p><label for="nom">Nom : <input type="text" id="nom" /></label></p>
    <p><label for="prenom">Prénom : <input type="text" id="prenom" /></label></p>
    <p>Âge : <select id="age"><option>21</option></select></p>
    <p><input type="submit" value="soumettre"/></p>
</form>
</div>

CSS

div{
   width:300px;
    margin:0 auto;    
}
}
label
{
	display: block;
	width: 70px;
}