Responsive page with media queries

What are you most proud of, and what would you do differently next time?

Maybe the use of BEM methodology and meta tags, it's my first using them but i think i did a good job, if you have a tip or tell me another way of doing it or declaring things, you can do it in the comments and i will be thankful with you!!.

What challenges did you encounter, and how did you overcome them?

Declaring things in BEM, i mean it's not so complicated but it's weird to declare, don't know how to explain it, but after some time i started typing and i think i get it now, i hope it's okay

What specific areas of your project would you like help with?

Maybe on BEM, if i wrote in a way that's unnaceptable or something like that just tell me.