title: styling radio button with css doesn't work
body: <p>i'm trying to style a radio button using just css, but i can't figure out why it does not work:</p>
  
  <p>HTML</p>
  
  <pre><code>&lt;input type="radio"&gt;
  </code></pre>
  
  <p>CSS</p>
  
  <pre><code>input[type="radio"]{
      background: green;
  }
  </code></pre>
  
  <p><a href="http://jsfiddle.net/vNmLe/" rel="nofollow">http://jsfiddle.net/vNmLe/</a></p>