Questione giuridica chiave
Whether custody of the child should be transferred to the mother under Art. 133 ZGB
Decisione estratta
The cantonal court correctly weighed the child-welfare criteria; no federal-law error justified changing custody, so custody remained with the father.
Motivazione estratta
The Federal Supreme Court held that child welfare is decisive, that the cantonal court had considered the relevant criteria, and that the mother's arguments largely amounted to inadmissible challenges to evidence assessment rather than legal error.