HTML5 > 90% - Globally supported HTML5 features across clients / browsers.

CSS3 > 90% - Globally supported CSS3 features across clients / browsers.

HTML5 > 70% - Almost globally supported HTML5 features across clients / browsers.

CSS3 > 70% - Almost globally supported CSS3 features across clients / browsers.

SVG > 90% - (Almost) Globally supported SVG features across clients / browsers.

Modularize CSS - 2 steps to modularize CSS styles into independent components.