JSFiddle - React, Tailwind, and code Playground

HTML

<div class="parent">
    Chillin in the background
    <div class="child">
        I really want to be on top.
    </div>
</div>
<div class="other-guy"> I want to be in the middle! </div>

CSS

.parent {
    background-color: yellow;
    position: absolute;
    top: 0;
    left: 0;
    height: 200px;
    width: 200px;
    z-index: 1;
}
.child {
    background-color: red;
    position: relative;
    top: 10px;
    left: 20px;
    height: 50px;
    width: 150px;
    z-index: 100;
}
.other-guy {
    background-color: green;
    position: absolute;
    top: 40px;
    left: 100px;
    height: 200px;
    width: 200px;
    z-index: 50;
}