The goal of this clinical trial (randomized controlled trial within a mixed-method study) is to learn whether Systemic Couple Therapy (SCT) can treat depression and improve relational functioning in married couples where at least one partner is experiencing mild to moderate depression and relational distress.
The main questions it aims to answer are:
* Does Systemic Couple Therapy improve relationship quality, marital communication, dyadic coping, interpersonal functioning, and overall mental health?
* Does Systemic Couple Therapy reduce depressive symptoms compared to Treatment-as-Usual (TAU)? Researchers will compare Systemic Couple Therapy (intervention group) with Treatment-as-Usual (control group) to see if SCT leads to greater improvements in mental health and relational outcomes and greater reduction in depression.
Participants will:
* Complete standardized psychological assessments at baseline, post-treatment (8 weeks), and 3-month follow-up
* Participate in 8 weekly Systemic Couple Therapy sessions (intervention group)
* Receive Treatment-as-Usual such as routine couple therapy services or medication (control group)