This is a great example of simple design winning out. Great design, great illustration and really straightforward copy make this one of the better product websites out there.
Mastering Grids in UI Design: The Backbone of Visual Harmony
A modern guide to UI design grids, learn how to build flexible 12-column and 4-column systems, master margins, gutters, and modules, and apply today’s responsive layout best practices.
I like the colors of the user guidance. However, I think there is a lack of synergy. as indicated by the download button, which should be the same color in the navigation. Blue download, blue link.