title: link functions wont work
body: <p>My code won't work, I am trying to change the color of my links (will add more specs later) but it won't change. The functions are not performed. I tried changing classes, adding id's, but nothing works.  Could someone tell me how to fix it please.</p>
  
  <p><strong>CSS</strong>            </p>
  
  <p><div class="snippet" data-lang="js" data-hide="false" data-console="false" data-babel="false">
  <div class="snippet-code">
  <pre class="snippet-code-css lang-css prettyprint-override"><code>       a:link.NB {
  
           color: red;
  
         }
  
         a:visited.NB {
  
           color: blue;
  
         }
  
         a:hover.NB {
  
           color: #green;
  
         }
  
         a:active.NB {
  
           color: #423243;
  
         }</code></pre>
  <pre class="snippet-code-html lang-html prettyprint-override"><code>&lt;nav id="N_bar"&gt;
    &lt;ul&gt;
  
      &lt;li&gt;&lt;a class="NB" href="#"&gt;Men&lt;/a&gt;
      &lt;/li&gt;
      &lt;li&gt;&lt;a class="NB" href="#"&gt;Women&lt;/a&gt;
      &lt;/li&gt;
      &lt;li&gt;&lt;a class="NB" href="#"&gt;Children&lt;/a&gt;
      &lt;/li&gt;
      &lt;li&gt;&lt;a class="NB" href="#"&gt;Apparel&lt;/a&gt;
      &lt;/li&gt;
  
    &lt;/ul&gt;
  &lt;/nav&gt;</code></pre>
  </div>
  </div>
  </p>