title: Not CSS selectors
body: <p>Is there some kind of "not" CSS selector?</p>
  
  <p>For example when I write the following line in my CSS, all input fields inside an tag with class <em>classname</em> will have a red background.</p>
  
  <pre class="lang-css prettyprint-override"><code>.classname input {
    background: red;
  }
  </code></pre>
  
  <p>How do I select all input fields that are OUTSIDE of a tag with class <em>classname</em>?</p>