JSFiddle - React, Tailwind, and code Playground

HTML

<div id=foo>some content</div>

CSS

body {
    background: url('http://i.imgur.com/pr86mh.jpg');
}
#foo {  
  border-radius: 1px;
  box-shadow: 0px 0px 0px 8px rgba(0,0,0,0.5);   
  background: #ddd; 
  padding: 8px; width: 100px; margin: 30px;
}