Very smart single page website design. Nice responsive solution too. I like the monochromatic/underplayed colors too, it sets the tone for a nice laid back expectation from these lessons.
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.
Wonderfully simple & to the point.