JSFiddle - React, Tailwind, and code Playground

HTML

<div id="pai">
    <div id="filho">
    </div>
</div>

CSS

#pai{
    width: 180px;
    margin: 0px 15px;
    border:1px solid red;
    position:relative;
    height:10px;
}

#filho{
    position: absolute;
    width: 100%;
    border:1px solid blue;
}