SSL over reverse proxy

Hello I'm using Perfect. It is really a good template!

But since I tried to enable ssl the rewrite rule for clean urls is not working. My page is secure when I dis-activate the clean url rule in joomla admin but not when it is active and all style and other resources are not loaded. Do you have an Idea. The certificate is installed on the reverse proxy.

Thank you for your help!
Ingrid

Sorry seems not to be a template related question.
BTW: Did you changed the htaccess
docs.joomla.org/Enabling_Search_Engine_Friendly_(SEF)_URLs