# 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 ]