title: How to apply CSS to inner Iframe element through parent window CSS class?
body: <p>I have a parent(main) page that has some <code>iframe</code> sections. And I want to apply css style to inner <code>iframe</code> element.</p>
  
  <p>When I googling for it, I found many post relate to this topic but they all suggest to use jquery/javascript to apply CSS to inner elements.</p>
  
  <p>Is it possible to apply css style to inner <code>iframe</code> element through parent window(main page) CSS class? </p>
  
  <p>(All the <code>iframe</code>'s domain is the same as the parent)</p>