cjk?
      ( font_variants_sans?
            ( media-fonts/source-han-sans )
       font_variants_serif?
            ( media-fonts/source-han-serif )
       font_variants_monospace?
            ( media-fonts/source-han-mono )
       )

emoji?
      ( media-fonts/source-emoji )

font_variants_monospace?
      ( media-fonts/source-code-pro l10n_ja?
            ( media-fonts/source-han-code-jp )
       )

font_variants_serif?
      ( media-fonts/source-serif-pro )

font_variants_sans?
      ( media-fonts/source-sans-pro )