# Three non-overlapping groups

group.nrw { fill: #ffa070; }
group.sachsen { fill: #f07070; }

( Bayern
  [ Augsburg ]
) { fill: #70b070; }

[ Augsburg ] --> [ Dortmund ]

( Nordrhein-Westfalen
[ Dortmund ] -> [ Olpe ]
--> [ Hamm ]
) { class: nrw; }

( Sachsen
  [ Leipzig ]
) { class: sachsen }

[ Hamm ] --> [ Leipzig ]