JSFiddle - React, Tailwind, and code Playground

HTML

<div id="bottom">
    lorem ipsum
    <br><br><br><br>
    lorem ipsum
    
    <div id="top">
        hello world
    </div>
    
</div>

CSS

#bottom {
    background:red;
    position:relative;
}

#top {
    background:rgba(0, 255, 0, 0.3);
    position:absolute;
    top:0;
    left:0;
    width:100%;
    height:100%;
}