This is a great guide/collection! It does a great job for those who know the basics to step up the game, thank you so much.<p>However, something notable that IMHO is missing is accessibility. This is clearly a DESIGN guide and should NOT be treated as a UI/UX guide. Some of the color in the page for instance don't pass the WCAG 2 AA guidelines, which is a really flexible one, let alone the WCAG 2 AAA (a more strict one). The mid-gray text over white background looks great; but it's quite bad for reading.