if !hlexists('cssWritingModeProp')
  syn match cssFontProp contained "\<text-\(orientation\|combine-horizontal\)\>"
  syn match cssFontProp contained "\<writing-mode\>"
  syn keyword cssFontAttr contained before after mixed isolate plaintext
  syn match cssFontAttr contained "\<\(upright\|sideways\(-right\|-left\)\=\|use-glyph-orientation\)\>"
  syn match cssFontAttr contained "\<isolate-override\>"
  syn match cssFontAttr contained "\<\(horizontal-tb\|vertical-\(rl\|lr\)\)\>"
endif