JSFiddle - React, Tailwind, and code Playground

HTML

<div id="wrapper">
  <div class="shadow">
  
  </div>
  <div class="shadow">
  
  </div>
</div>

CSS

div {
  box-sizing: border-box;
}
#wrapper {
  width: 100%;
  height: auto;
  overflow: hidden;
}
.shadow {
  width: calc(50% - 20px);
  min-height: 200px;
  background: #fff;
  box-shadow: 0 1px 3px #333;
  float: left;
  margin: 10px;
}