We have SP2010 project with CSS applied to SharePoint page CSS classes. Now in SP2013 we notice that few CSS classes like 'quick-launch' no longer exist. That means we will have to change the CSS accordingly. When the custom CSS code that looked cool in SP2010 is used in SP2013, it does not look so good, obviously because some classes have either changed or no longer exist.
I would like to know which are the classes that I have to look out for? Any reference to blog/articles will be helpful.