title: checkbox not visible in any browser
body: <pre><code> &lt;style&gt;
      input[type="checkbox"]
      {
      -webkit-appearance: checkbox;
  
      }
  
  &lt;/style&gt;
  
  &lt;input type="checkbox" id="radio6" value="1" name="sports" /&gt;
  </code></pre>
  
  <p>I am stuck in this for quite a while. Please help</p>