Theme Integration

Hi there!

I am running a site for free papercraft templates. I want to use edd for a sub-site which looks exactly like the main site for giving some talented users the ability to sell their templates without any fees to the community.
Is it possible to use the grid system from the main site template (I am using “Pictorico”) in the store front view?
(https://www.paperkura.com <- The store front should look ecactly like here)
I tried to figure it out for myself, but if anybody could point me in the right direction i would be very grateful!

Thank you very much!
krauthaus

https://www.ads-software.com/plugins/easy-digital-downloads/