What's inside "print render($page['content'])"? I want to style my front page in Omega subtheme I'm using an Omega sub-theme in Drupal 7.
In my front page, I have some sort of "river of news" with all content that has the "promote to the front page" checkbox checked.
I would like to create a special front page, so I've copied my page.tpl.php into a new page--front.tpl.php.

I would like to add a special CSS class to that list of content. (The list is filled with all teasers by default.) When I try to target that specific piece of content, I get only this:         

&lt;?php print render($page['content']); ?&gt;


Inside that is the content section, and the sidebars sections.

How do I target only the list of teasers?
The content of the $page array is described in hook_page_alter(), where the documentation says:


  The $page array contains top level elements for each block region:
  
  
  $page['page_top']
  $page['header']
  $page['sidebar_first']
  $page['content']
  $page['sidebar_second']
  $page['page_bottom']
  
  
  The 'content' element contains the main content of the current page, and its structure will vary depending on what module is responsible for building the page. Some legacy modules may not return structured content at all: Their pre-rendered markup will be located in $page['content']['main']['#markup'].
  
  Pages built by Drupal's core Node and Blog modules use a standard structure:

  // Node body.
  $page['content']['system_main']['nodes'][$nid]['body']
  // Array of links attached to the node (add comments, read more).
  $page['content']['system_main']['nodes'][$nid]['links']
  // The node object itself.
  $page['content']['system_main']['nodes'][$nid]['#node']
  // The results pager.
  $page['content']['system_main']['pager']



You can use $page['content']['system_main']['nodes'][$nid]['body'], remembering there is a $page['content']['system_main']['nodes'][$nid]['body'] for each node. Check its structure to see in which way you can add a CSS class to that array.