JSFiddle - React, Tailwind, and code Playground
CSS
body::before {
content: "";
height: 10px;
width: 110%;
position: fixed;
top: -10px;
left: -10%;
-webkit-box-shadow: 0 0 10px rgba(0,0,0,.65);
-moz-box-shadow: 0 0 10px rgba(0,0,0,.65);
-ms-box-shadow: 0 0 10px rgba(0,0,0,.65);
-o-box-shadow: 0 0 10px rgba(0,0,0,.65);
box-shadow: 0 0 10px rgba(0,0,0,.65);
}
body { overflow-x: hidden; }
JavaScript
// http://genelocklin.com/428-add-depth-to-your-webpage/