Cool use of the fixed header/navigation and more interactivity on the sub pages. I can take or leave the dark background but it looks like the product itself is in a black container to it seems a very fitting choice.
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 am subzero website is awesome, try the product its even better!