title: CSS triangle with inset shadow
body: <p>I've made a "triangle" using CSS using the code outlined <a href="http://apps.eky.hk/css-triangle-generator/" rel="nofollow noreferrer">HERE</a></p>
  
  <p><a href="https://jsfiddle.net/wf6u3gdd/" rel="nofollow noreferrer">(jsFiddle example)</a></p>
  
  <p>It works great, but I would like to have an inset shadow on the triangle and bar like this:</p>
  
  <p><a href="https://i.stack.imgur.com/GHw98.jpg" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/GHw98.jpg" alt="enter image description here"></a></p>
  
  <p>How?</p>
  
  <p>HTML:</p>
  
  <pre><code>&lt;div id="wrapper"&gt;
      &lt;div class="triLeft"&gt;&lt;/div&gt;
      &lt;div class="triAngle"&gt;&lt;/div&gt;
  &lt;/div&gt;
  </code></pre>
  
  <p>CSS:</p>
  
  <pre><code>.triLeft{
    width:40px;
    background:#fff;
    margin:0;
    float:left;
    height:200px;
  }
  
  .triAngle{
    width: 0;
    height: 0;
    border-style: solid;
    border-width: 45px 0 45px 40px;
    border-color: transparent transparent transparent #ffffff;                  
    float:left;
    margin-top:20px;
  }               
  
  #wrapper{
    height:200px;
    background:brown;
  }
  </code></pre>