Digital Cognitive Behavioral Therapy for Gambling Disorder

Inclusion Criteria for Patients With Gambling Disorder: * Aged 18 to 59 years. * Positive screening for gambling problems using the validated Indonesian version of the South Oaks Gambling Screen (SOGS), with a score of 5 or higher. * Diagnosis of gambling disorder according to ICD-11 criteria confirmed through a psychiatric interview conducted by an addiction psychiatrist. * Willing and able to provide written informed consent. * Has one eligible affected family member who is willing to participate and provide written informed consent. * Has access to the internet and a smartphone capable of accessing the digital intervention. Exclusion Criteria for Patients With Gambling Disorder: * No history of gambling during the previous 6 months. * History of a neuropsychiatric disorder that would interfere with study participation. * Severe mental disorder or intellectual disability preventing adequate completion of study assessments or participation in CBT. * Severe agitation preventing adequate participation in CBT. * Previous pharmacological or non-pharmacological treatment specifically for gambling disorder (treatment-naive). Inclusion Criteria for Participating Family Members: * 18 years or older. * Willing and able to provide written informed consent. * Is the parent, spouse, or sibling of the participating patient with gambling disorder. * Accompanies the patient during treatment and is affected by the patient's gambling behavior. * Has access to the internet and a smartphone capable of accessing the digital intervention. Exclusion Criteria for Participating Family Members: • The associated patient withdraws from the study or otherwise becomes ineligible for continued study participation.