Add CSS class to body for admin-end
Depending on your theme, you should be able to do something like this:

function YOURTHEME_preprocess_html(&amp;$variables) {
  global $user;

  if ($user-&gt;uid) {

    if (arg(0)=='admin') {
      $variables['classes_array'][] = 'admin-page';
    }
    if (arg(0)=='node' &amp;&amp; arg(2)=='edit') {
      $variables['classes_array'][] = 'node-edit-page';
    }

  }

}