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Related party transactions - Summary of key management personnel compensation expense (Details) - BRL (R$)
R$ in Thousands
 12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Disclosure of transactions between related parties [abstract]      
Key management personnel fixed compensation R$ 21,912 R$ 17,695 R$ 17,445
Key management personnel variable compensation 30,727 16,252 15,843
Key management personnel compensation R$ 52,639 R$ 33,947 R$ 33,288