Well thank you for your reply, I appreciate your effort to be helpful, but you actually did not.
I believe I asked a very direct and specific question, and it was not only about the responsive breakpoints issue (the issue is in the height or to be more specific, in the vertical positioning, not the with) As I said "… Also, I have a DIV called “main_wrapper” that changes position in almost every breakpoint…"
Well, so once again thank you for the links ( a very diplomatic way to say: — “go and learn you dumb ass!”) I don’t have 50hrs to dig in so I can solve this particular issue.
And Dave, I am sure I don’t have to tell you that the best way to learn is doing it not only watching videos or tutorials, is actually doing it and make mistakes. I do believe that what I did with that page is already showing I actually watched some videos. Don’t you think so?