JSFiddle - React, Tailwind, and code Playground

by Luis Almeida

HTML

<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.5/css/bootstrap.min.css">
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.5/js/bootstrap.min.js"></script>
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/font-awesome/4.4.0/css/font-awesome.min.css">
<div id="main-nav">
  <div id="triangle">
  </div>
</div>

CSS

#main-nav {
  position: relative;
  height: 200px;
  width: 1200px;
  background-color: #D1C5B9;
  overflow:hidden;
  z-index: 1;
}

#triangle {
  position: absolute;
  display: block;
  width: 100%;
  background: #3C3C3A;
  height: 40px;
  z-index: 4;
}

#triangle:after {
  position: absolute;
  content: "";
  display: block;
  width: 100px;
  height: 50px;
  transform: rotate(15deg);
  background: #3C3C3A;
  z-index: 4;
  border-radius: 14px;
  left: 50%;
  margin-left: -65px;
  top: 0px;
  border: 1px solid #3C3C3A;
}

#triangle:before {
  position: absolute;
  content: "";
  display: block;
  width: 100px;
  height: 50px;
  transform: rotate(-15deg);
  background: #3C3C3A;
  z-index: 3;
  border-radius: 14px;
  left: 50%;
  margin-right: 0;
  top: 0px;
  border: 1px solid #3C3C3A;
}