Is their any change in Knack CSS classes?

I wanted to know if knack has changed some of its CSS classes?

I am trying to use old CSS code which is working 100% fine with my previous views but not working on new views i have created today. Is anyone experiencing the same problem or is it just me.

I read that knack is improving its CSS classes with new upcoming theme which I am really excited about. So I have a question for knack team.

Will this change affect my previous CSS code?

Thank You