title: How do I center an h1 in the body
body: <p>I tried centering my h1 in the body tag like this:</p>
  
  <pre><code>h1 {margin:0 auto}
  </code></pre>
  
  <p><a href="http://jsfiddle.net/qPDwY/" rel="noreferrer">http://jsfiddle.net/qPDwY/</a></p>
  
  <p>But it doesn't center. How do I fix it?</p>