title: CSS :last-of-type and :before is not working
body: <p>I have an issue with applying <code>:last-of-type</code> and <code>:before</code>.</p>
  
  <p>I have the following:</p>
  
  <pre><code>.stepwizard-row:before {
    position: absolute;
    top: 0px;
    content: " ";
    width: 1px;
    height: 100%;
    background-color: #97D3FD;
  }
  .stepwizard-row:before:last-of-type {
    position: absolute;
    top: 0px;
    content: " ";
  }
  </code></pre>
  
  <p>However, the <code>:before:last-of-type</code> doesn't seem to have any effect.</p>
  
  <p>What am I doing wrong?</p>