--exclude-list = mkdocs/themes/mkdocs/css/bootstrap.min.css,
                 mkdocs/themes/mkdocs/css/font-awesome.min.css,
                 mkdocs/themes/mkdocs/css/highlight.css,
                 mkdocs/themes/readthedocs/css/theme.css
--errors = known-properties,
           box-sizing,
           outline-none,
           bulletproof-font-face,
           compatible-vendor-prefixes,
           errors,
           duplicate-background-images,
           duplicate-properties,
           empty-rules,
           selector-max-approaching,
           gradients,
           floats,
           font-faces,
           font-sizes,
           shorthand,
           import,
           import-ie-limit,
           text-indent,
           rules-count,
           regex-selectors,
           selector-max,
           selector-newline,
           star-property-hack,
           underscore-property-hack,
           universal-selector,
           unqualified-attributes,
           vendor-prefix,
           zero-units,
           overqualified-elements,
           unique-headings,
           qualified-headings,
           ids,
           display-property-grouping,
           fallback-colors,
           box-model,
           important,
           adjoining-classes
--ignore = order-alphabetical