Responsive Huddle landing page with curved sections

aaaah >_<! This was a challenging one because of the curves! However, somehow I managed to do it on my own with what I have learned before :-)! (I have a rule that I can't look for the solution on the internet until I solve it on my own, if it's been more than 40 minutes and I really can't, then I look for the solution. But this way I put pressure on myself to think more in the moment of solving something)

I think I wrote more css than normal (what do you think?) ... I had to make some changes on my html when I was almost finishing an I messed it up XDDDD so I had to change some class names here and there and well, that´s it.

On the other hand, the feedback you leave is really helpful!, bit by bit I´ve been learning a lot (I think? 0.0) thanks to you too, guys!

As a funny side note ("funny"): I didn't know it was allowed to use frameworks in your projects!! D: When i finish all the free html and css challenges, and start those containing JS I will start trying different frameworks! I am excited!

and as always:

Also thanks to everyone for taking the time to read and see my solution, and to those who provide feedback! It is greatly apreciated

So if you have any advices on how I can improve my choices and the way I write my code, I would greatly appreciate it!

Thanks in advance :D! Have a nice day! :=)