Sketch³

For people who want to know what changes were made to this Sketch UI, I increased the contrast on the buttons and glyphs, added a glyph for the pages as well as a drop-down indicator to show that one can add have multiple pages.

Most importantly, I've added a consistent lighting scheme. Before, there was conflicting lighting with several 1px vertical gradients going from transparent to white on the navigation bar, which was inconsistent with the light to dark (vertical light) gradient that is apparent on all other elements. To enhance this lighting scheme, I've ensured that the bevels are consistent on both sides, considering the light is again vertical.