JSFiddle - React, Tailwind, and code Playground

HTML

<div class="outer">
    <div class="inner">
        //some stuff<br/>
    </div>
</div>

CSS

.outer {
width: 100%;
height: 96px;
    position:absolute;
border:1px black solid;   
background-color: black;
}

.inner {
    width:900px;
    height: 40px;
 position:relative;
border: 1px red solid;
vertical-align: middle;
background-color: white;
}