fylo-landing-page-with-two-column-layout-master

I used flex-box for each section so I can create the same layout as the design images and this way required so much code, so is there any other way to do that??

also I used a lot of media quarries to build a responsive design and I am also asking for another way for that with less media queries (less code)??

I also couldn't customize the error message on invalid submit, I don't know exactly the way to do that. Thanks