CSS Object model
----------------

Allright, reading the spec
rule type are

* qRule style,

* atRule counter-style,
* atRule font-face,
* atRule keyframes,
* atRule media,
* atRule page,
* atRule supports,
* atRule viewport

* atRule import,
* atRule keyframe,
* atRule margin,
* atRule namespace,
* atRule font-feature-values,


// Currently in parser:

* counter-style: DECLS,
* font-face: DECLS,
* keyframes: RULES,
* media: RULES,
* page: DECLS,
* supports: RULES,
* viewport: DECLS,

and
* document: RULES,