title: Making sense of CSS Lint warnings
body: <p>I am writing the CSS for our website and I just ran it through CSS Lint. I'm struggling making sense of quite a few of the warnings so would greatly the community's assistance.</p>
  <ol>
  <li><p>Don't use IDs in selectors.</p>
  <p>Isn't that the point of the IDs? To be used to address a particular element on the page?</p>
  </li>
  <li><p>2 IDs in the selector, really?</p>
  <p>Is there a better way of selecting an element rather than using two selectors in the same line?</p>
  </li>
  <li><p>Broken box model: using height with border-top.</p>
  <p>I have no idea what this means. My understanding is that box height is separate to border height. I have defined a height for the element than then the border sides are being individually defined, where am I going wrong?</p>
  </li>
  <li><p>Heading (h1) should not be qualified.</p>
  </li>
  </ol>