Modern Concrete Stairwell Portrait

Create a photorealistic full-body fashion portrait of subject leaning casually against a large pale concrete pillar in a modern minimalist interior. She has long dark brown wavy hair and an intentionally obscured face covered by a soft rectangular blur, with a relaxed posture, shoulders against the wall, both hands tucked into the front pockets of loose high-waisted wide-leg blue jeans. She wears top and is barefoot, with one leg crossed slightly in front of the other. The setting is location, featuring a wide staircase rising on the right, angular concrete railings, geometric window latticework near the top, and soft natural daylight casting long shadows across the floor and wall. Use realistic proportions, natural skin tones, subtle fabric folds, detailed denim texture, shallow depth of field, muted gray and blue color palette, documentary editorial photography style, vertical composition, 4:5 aspect ratio. Add a semi-transparent white watermark reading watermark_text in the bottom-left corner.