title: Can you use the ::slotted() pseudo selector to target a specific named slot
body: <p>I am creating a custom element which contains both a default (ie unnamed) slot and some named ones.  I specifically want to style the content of one of the named slots, but not any of the others.</p>
  
  <p>Is there a way of selecting a specific named slot.</p>
  
  <p>As an example of the sort of thing I want to do, my custom element contains a dialog box - like so:</p>
  
  <pre><code>&lt;dialog&gt;
   &lt;slot&gt;&lt;/slot&gt; &lt;!-- general content --&gt;
   &lt;div class="buttons"&gt;
    &lt;slot name="action"&gt;&lt;/slot&gt;
    &lt;slot name="cancel"&gt;&lt;/slot&gt;
   &lt;/div&gt;
  &lt;/dialog&gt;
  </code></pre>
  
  <p>and I want to style all the action buttons a solid color and the cancel buttons a more washed out color.</p>