Cozy Monochrome Activewear Portrait in Modern Interior

A portrait of a young woman sitting gracefully on a dark polished marble floor in a modern room, captured through a tall mirror self-portrait angle. She has soft dark brown hair styled in a loose low ponytail with gentle strands framing her face. She has smooth skin, a warm subtle smile, and dark expressive eyes looking slightly toward her phone screen. Her body pose is relaxed yet poised as she holds a white modern smartphone up with one hand to snap the mirror photo, while her other hand lightly touches her ponytail behind her neck. She wears a vibrant deep purple ribbed sleeveless tank top and matching purple athletic shorts. The background features a sophisticated interior with tall beige curtains beside large windows, warm recessed ceiling lights, and minimalist wooden furniture reflecting in the mirror. Shot with a sharp portrait lens at 85mm, featuring a shallow depth of field, natural soft ambient window light blended with warm interior lighting, crisp fine textures, photorealistic depth, realistic skin tone, and a high-definition cinematic finish.