SeoRef - Landing Page

A simple landing page design for a web app I'm building called SeoRef. Though I'm not a designer, I've been trying to stay true to my goal of producing some form of content every weekend as a way of personal growth – and design is one of the things that I wish to become a lot better at.

Please leave suggestions! I was aiming for a very simple look that gets straight to the point, but I can't help but feel it's a bit "empty".