I like the fixed window feel to this design. With the header and sidebar staying put the section that scrolls gives the site a real app-like feel. I do wish it was responsive, it would make a lot of sense too for the site/app I think. My favorite part is the icon/illustration section where the page informs you on what RidePost is. It’s clear and concise and works non-linearly which is great because the idea of the app is a bit complicated.