JSFiddle - React, Tailwind, and code Playground

HTML

<div id="outer">
    <div id="inner">
    </div>
</div>

CSS

#outer {
background-color:#999;
width:80%;
margin:0 auto;
height:40px;
overflow:visible;
}
#inner {
background-color:#066;
height:20px;
margin:0 2.5%;
padding:0 40px;

}