JSFiddle - React, Tailwind, and code Playground

HTML

<div id="block">
</div>

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

CSS

html {
  height: 100%;
}

body {
  margin: 0;
  padding: 0;
  height: 100%;
  width: 100%;
}

#shadow {
  position: absolute;
  left: 50px;
  top: 225px;
  width: 250px;
  height: 175px;
  bottom: 0;
  z-index:1;
  -webkit-box-shadow: 0px 6px 26px -3px rgba(3, 7, 18, 1);
  -moz-box-shadow: 0px 6px 26px -3px rgba(3, 7, 18, 1);
  box-shadow: 0px 6px 26px -3px rgba(3, 7, 18, 1);
}

#block {
  z-index:2; 
  position: absolute;
  left: 50px;
  top: 50px;
  width: 250px;
  height: 350px;
  /* Permalink - use to edit and share this gradient: http://colorzilla.com/gradient-editor/#cc1e4a+0,3a2353+100 */
  background: #cc1e4a;
  /* Old browsers */
  background: -moz-linear-gradient(top, #cc1e4a 0%, #3a2353 100%);
  /* FF3.6-15 */
  background: -webkit-linear-gradient(top, #cc1e4a 0%, #3a2353 100%);
  /* Chrome10-25,Safari5.1-6 */
  background: linear-gradient(to bottom, #cc1e4a 0%, #3a2353 100%);
  /* W3C, IE10+, FF16+, Chrome26+, Opera12+, Safari7+ */
  filter: progid: DXImageTransform.Microsoft.gradient( startColorstr='#cc1e4a', endColorstr='#3a2353', GradientType=0);
  /* IE6-9 */
}