CSSImportRule type = 3
CSSNamespaceRule type = 10
CSSStyleRule type = 1
CSSMediaRule type = 4
CSSFontFaceRule type = 5
CSSKeyframesRule type = 7
CSSSupportsRule type = 12
CSSLayerStatementRule type = 0
CSSLayerBlockRule type = 0
CSSPropertyRule type = 0