yardimlazim Yes, but that's a compressed (minifed) version of the CSS, and likely to be unreadable unless you unminify it. Also, it will not be complete if you use extensions that do not have their own entries. You'd need to extract the mobile only @media
queries and associated CSS from that file.
This is not a small task by the way and not to be underestimated in terms of the time it's going to take.