Selfie frente al espejo en gimnasio de lujo

Realistic full-body photograph of a stylish young woman taking a mirror selfie in a modern luxury gym, sitting cross-legged on a [wooden workout bench]. She has [long, straight dark-brown hair], a calm natural expression, holding a black smartphone in front of her face. She wears a [sleek all-black sleeveless athletic outfit with loose black pants and light-colored chunky sneakers] and a simple wristwatch. Spacious upscale gym interior with large mirrors, fitness machines, polished wooden flooring, and warm beige ambient lighting. Natural skin texture, clean minimalist aesthetic, shallow depth of field with subtle background blur.