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[Subject] One young woman taking a close casual selfie in a police-inspired cosplay look, early 20s, feminine presentation, slim build, light olive skin, large blue-green eyes, long black hair tied in a high ponytail, thin round metal glasses, medium silver hoop earrings, and a bright friendly smile showing teeth. She wears a dark navy police-style cap with a silver badge, a dark uniform-inspired shirt or jacket with flap pockets and shoulder patch, and a black bra-style top visible beneath the open shirt. The expression is playful and confident rather than serious, with direct engaging eye contact toward the phone camera.
[Environment] Indoor room with cool blue ambient lighting and a modern casual background. A large window on the left shows bluish daylight or cool exterior light. On the right side, a glowing wall sign or neon letters are partially visible, along with a softly blurred side table or furniture edge. The room should feel like a home setup or creator studio rather than an actual police environment.
[Composition/Camera] Vertical 3:4 selfie portrait cropped from upper torso to slightly above the hat. Subject fills most of the frame, positioned just left of center, with one arm extending toward the lower-left corner to imply phone capture. The camera is close and slightly above chest height, creating a flattering casual selfie perspective. Background remains softly blurred so the face, cap, glasses, and uniform details dominate.
[Lighting] Soft mixed indoor lighting with cool blue ambient tones from the room and gentle warm-neutral fill on the face. The eyes should have clear catchlights, skin should remain natural, and the dark navy clothing should keep visible texture. No harsh flash, no hard shadows. The overall mood is polished but casual.
[Style/Rendering] Photorealistic social-media cosplay selfie, clean influencer-style realism, sharp face detail, realistic hat badge, smooth hair texture, subtle reflections on the glasses, and believable indoor blur. The image should feel like a fun everyday creator selfie wearing a themed outfit, not a cinematic police drama or editorial costume shoot.
[Detail constraints] Keep exactly one subject with police-style cap, navy shirt/jacket, glasses, hoop earrings, and black inner top. Preserve the cool-lit indoor room with left window and partial glowing sign on the right. Do not add extra people, police vehicles, weapons emphasis, or official scene action. This is a casual cosplay selfie portrait.

Negative prompt: extra people, police car background, realistic crime scene, weapon focus, missing cap badge, missing glasses, painterly texture, cartoon style, heavy glam makeup, harsh flash, cluttered room, watermark.

Suggested parameters: aspect ratio 3:4, smartphone selfie portrait feel, shallow depth of field, 24-32 steps, CFG/style strength 6-7.5, sampler DPM++ 2M Karras or equivalent, seed around 358244.

Delta prompt strategy:
1. If the selfie feel weakens: add "close casual smartphone selfie with one arm implied toward the camera".
2. If the cap loses identity: add "dark navy police-style cap with a bright silver badge centered on the front".
3. If the glasses disappear: add "thin round metal eyeglasses with soft indoor reflections".
4. If the room becomes generic: add "cool blue-lit room with a left window and partial glowing sign on the right".
5. If the outfit becomes too realistic-duty: add "playful cosplay styling, open navy uniform shirt over black inner top".
6. If the expression turns serious: add "friendly bright smile and approachable social-media selfie energy".
7. If lighting gets harsh: add "soft mixed indoor lighting with cool ambient tones and gentle facial fill".
8. If the crop changes too much: add "upper-torso to hat portrait crop with face dominating the frame".
9. If the background gets too sharp: add "softly blurred indoor background secondary to the subject".
10. If the image feels too editorial: add "natural creator-room selfie, casual and believable rather than high-fashion".