Responsive webpage with media queries

Hello guys, it's me again, well the issue I had with this is for the filter on the image, I don't think it's the same color but I'm happy I have exactly the idea of how that was made, also for the mobile view when I checked on my mobile it didn't align to the center vertically even after I stated it in my code, I do not know if it's my screen size or there is a bug somewhere in my code, so help me out guys. Thank you in anticipation...