I have a css file referenced in my site's master page that changes the header margins. However, I only want this CSS to affect headers on Wiki pages. I also want to avoid having to use a special class where I have to go back and edit each of the header tags in my Wiki pages or where I have to manually write each header tag while creating the pages (I'm going to have hundreds of Wiki pages...).
Is there a way in CSS to target tags belonging to a specific page layout or content type? Currently my header margin CSS is effecting all headers on the site, including webpart headers and site navigation.
I am running SharePoint 2013 Foundation with access to SharePoint Designer 2013.