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[Subject] One young woman taking a casual mirror selfie in a dance studio, early 20s, feminine presentation, slim athletic build, light olive skin, long black hair in a high ponytail, thin round metal glasses, soft smile, and relaxed confident posture. She wears an oversized white cropped T-shirt with bold blue-black graphic text across the front, loose black track pants with white side stripes and a small sports logo, and white high-top sneakers. She holds a smartphone in her right hand at chest height while looking down slightly at the screen. Her left hand rests inside a trouser pocket. Her stance is relaxed with weight shifted onto one hip and one leg slightly bent.
[Environment] Bright dance studio interior with mirrored wall, wooden floor, ballet barre running horizontally across the back wall, and several blurred dancers or classmates in the background. The walls are pale beige or cream, with tall windows letting in soft daylight. A few posters or signs hang on the back wall. The space feels like a real practice room rather than a staged photoshoot.
[Composition/Camera] Vertical 3:4 mirror-selfie composition. The full body is visible from shoes to just above the head, centered slightly left. The mirror seam is faintly visible on the left edge, reinforcing the reflected-capture look. Background dancers remain out of focus and secondary. The subject dominates the center of the frame, with strong vertical posture and enough floor area visible to ground the sneakers and body stance. Lens feel is smartphone-standard, around 24-28mm equivalent, natural and casual.
[Lighting] Soft natural indoor daylight mixed with neutral studio ambient light. No flash, no hard shadow. The face, shirt, and pants should be evenly lit, with gentle highlights on the hair and glasses. The room should feel airy and authentic, with slightly brighter light around the window area and an overall realistic practice-studio tone.
[Style/Rendering] Photorealistic lifestyle mirror selfie, realistic dance-class atmosphere, clean social-media realism. Detailed fabric drape in the oversized shirt and joggers, believable sneaker shape, subtle reflections on the mirror, and natural body proportions. The image should feel casually captured before or after class, not a polished commercial sportswear ad.
[Detail constraints] Keep exactly one main subject in the mirror reflection, with white cropped T-shirt, black joggers, white sneakers, glasses, and high ponytail. Preserve the dance studio setting with wooden floor, barre, windows, posters, and a few blurred dancers in the background. Do not add props like water bottles, gym machines, or stage lighting. This is an everyday dance-studio mirror selfie.

Negative prompt: extra foreground people, no mirror look, gym equipment, stage spotlights, painterly texture, cartoon style, distorted body proportions, missing sneakers, missing barre, no background dancers, heavy glam styling, watermark.

Suggested parameters: aspect ratio 3:4, smartphone mirror-selfie feel, moderate depth of field, 24-32 steps, CFG/style strength 6-7.5, sampler DPM++ 2M Karras or equivalent, seed around 412906.

Delta prompt strategy:
1. If the dance studio setting weakens: add "dance studio with wooden floor, wall mirror, ballet barre, windows, and posters".
2. If the pose becomes too stiff: add "casual mirror selfie pose, one hand holding phone, other hand in pocket, weight shifted to one hip".
3. If the shirt changes: add "oversized white cropped T-shirt with bold graphic lettering".
4. If the pants drift: add "loose black track pants with white side stripes and small athletic logo".
5. If the sneakers disappear: add "white high-top sneakers clearly visible on the wooden studio floor".
6. If the background gets empty: add "a few blurred dancers or classmates behind the subject in the practice room".
7. If the lighting turns dramatic: add "soft natural studio daylight with even indoor ambient illumination".
8. If the mirror effect is unclear: add "captured as a mirror selfie with subtle reflection cues and mirror seam".
9. If the expression becomes overly posed: add "soft natural smile and relaxed before-or-after-class mood".
10. If the image becomes ad-like: add "realistic candid dance-class selfie, not a commercial campaign".