JSFiddle - React, Tailwind, and code Playground

HTML

<div class="popup">
  <div class="wrapper">
    
    
       <img src="http://farm4.staticflickr.com/3310/3247132262_9c5e58da0f_o.jpg">
         
         
    </div>
</div>

CSS

.popup{
  position:fixed;
  left:50%;
  
}
.popup .wrapper{
  position:relative; 
  left:-50%;
  
  /*popup-styles*/
  background-color:#fff;
  padding:10px;
  border:solid 2px #444;
  border-radius:10px;
}

html{background-color:#aaa;}