PDP (Product Detail Pages) with sticky 'Add to Bag'

I'm glad to see online last project which I've been working last past months within HN team.

PDP (Product detail pages), fully responsive, new features as a sticky 'add to bag' and plenty of variants i.e. marketplace products, food products, beauty products, fashion products...

Here it is a quick mockup prototyped in reference to the sticky 'add to bag' on a fashion product.

Feedback always welcome :)