%% This is part of the OpTeX project, see http://petr.olsak.net/optex

\_famdecl [Jost] \Jost {Jost* geometric sans-serif}
        {\hairline \thin \light \medium}
        {\rm \bf \it \bi \kf \ki} {}
        {[Jost-400-Book]}
        {\_def\_fontnamegen {[Jost-\_currV]:script=latn;\_fontfeatures}}

\_wlog{\_detokenize{%
Modifiers (weight):^^J
 \hairline ... \rm, \it: Hairline, \bf, \bi: Book^^J
 \thin ....... \rm, \it: Thin, \bf, \bi: Medium^^J
 \light ...... \rm, \it: Light, \bf, \bi: SemiBold^^J
 \medium ..... \rm, \it: Medium, \bf, \bi: Heavy^^J
Extended Variants:^^J
 \kf, \ki .... Black, BlackItalic^^J
}}

\_moddef \resetmod {\_fvars 400-Book     700-Bold   400-BookItalic     700-BoldItalic }
\_moddef \hairline {\_fvars 100-Hairline 400-Book   100-HairlineItalic 400-BookItalic }
\_moddef \thin     {\_fvars 200-Thin     500-Medium 200-ThinItalic     500-MediumItalic }
\_moddef \light    {\_fvars 300-Light    600-Semi   300-LightItalic    600-SemiItalic }
\_moddef \medium   {\_fvars 500-Medium   800-Hevy   500-MediumItalic   800-HevyItalic }
\_moddef \black    {\_fvars 900-Black    .          900-BlackItalic    . }
\_private \black ;

\_famvardef \kf {\_black\_rm}
\_famvardef \ki {\_black\_it}

\_initfontfamily

\_endcode