JSFiddle - React, Tailwind, and code Playground

HTML

<div id="d1">texto</div>
<div id="d2">mas texto</div>

CSS

*
{
    margin:0;
    padding:0;
}
div
{
    background-color:#15bbce;
    color:#fff;
    float:left;
    height:400px;
    width:200px;
}
#d2
{
    position:relative;
    margin-left:10px;
}
@media screen and (max-width:410px)
{
            div
            {
            width:100%;
            }
            #d2
            {
            margin-left:0;
            margin-top:20px;
            }
}