A course or guide on how to properly layout for different devices?

Question

css

Tell me, is there any guide or video course in Russian, where the basics of professional layout for different devices would be systematically outlined. In what units and why, how to typeset for retina, how to prepare pictures, etc.

Answer 1

write the same thing on youtube, a wagon with a cart like that there

Answer 2

At codecademy there is a wonderful course for a couple of hours Responsive web design, even through Google translate everything is clear.