Hi Rafal,
I read your requirement as per our work experience.
You wan to change/Remove the background of your site.
Please provide the details than will start your work immediately.
As per match please check our recent work:
1. [login to view URL] (Responsive)
2. [login to view URL] (Responsive)
3. [login to view URL] (Responsive)
4. [login to view URL] (Responsive)
5. [login to view URL] ( Woo commerce)
6. [login to view URL] ( Woo commerce)
Thanks