When the user clicks on add to cart the fancybox that pop ups is not styled based on the flexible.css. The thing is that the flexible.css is not loaded on the homepage.
How can I fix this conflict?

Hi,

Please take a look at this topic:
www.flexiblewebdesign.com/forum-virtuemart-template-support/3545-issues-with-checkout#14838

You are experiencing the exact same problem.

But in your case, you need to insert these lines instead:

Regards