JSFiddle - React, Tailwind, and code Playground

HTML

<div id="shadowBox">
</div>

CSS

#shadowBox {
    margin: 10px;
    width: 250px;
    height: 250px;
    box-shadow: inset 0 2px 7px 0 rgba(0, 0, 0, 0.5);
    border-radius: 3px;
    background: #f0f0f0;
}