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[Subject] One young woman in a retro anime sci-fi fashion style, standing in a three-quarter pose with a calm cool gaze. She has long straight black hair, blue eyes, warm tan skin, and a sleek slender build. Her right arm is a polished mechanical prosthetic. She is alone, with no extra people.

[Clothing & materials] She wears a simple blue bandeau or crop top with a pale draped jacket or shawl slipping from one shoulder, plus glossy blue-violet high-cut bottoms or fitted techwear around the hips. The mechanical arm should look chrome-blue and segmented, with visible joints and polished reflections. No boots, no cluttered accessories, no weapons.

[Environment] Flat saturated red studio background with no visible scenery or objects. The background should act like a bold poster field and keep the entire focus on the figure. No city, no room furniture, no crowd.

[Composition/Camera] Vertical portrait composition, medium-full crop, subject centered slightly left with the black hair dropping straight down the back and the mechanical arm occupying the right side of the frame. The torso should twist subtly to show the waist and hip lines. Keep the pose elegant, poised, and fashion-editorial.

[Lighting] Strong even studio lighting with bright chrome highlights on the mechanical arm and glossy bottoms. The red background should remain flat and vibrant, contrasting sharply with the black hair and blue clothing. Avoid heavy shadows.

[Color palette] Dominant red backdrop, black hair, chrome-blue metal, blue-violet clothing, and warm tan skin. Bold retro cyber-fashion palette with high contrast.

[Style/Rendering] 80s-90s retro anime sci-fi fashion illustration, polished linework, smooth shading, crisp metallic reflections, subtle grain, clean poster finish, not photorealistic, not 3D, no comic halftone. The image should feel sleek, futuristic, and editorial.

[Detail constraints] Keep exactly one woman. Keep the black hair, red background, chrome-blue mechanical arm, blue top, and draped shoulder cloth. Do not add extra people, scenery, or clutter. Preserve the clean cyber-fashion silhouette and the centered poster feel.

Negative prompt: extra people, duplicate limbs, bad hands, blonde hair, short hair, jacket fully on, city street, neon signs, clutter, photorealism, 3D render, blurry face, watermark, text, logo, lowres, dark background

Suggested parameters: aspect ratio 4:5, SDXL or anime model, 35-50mm fashion portrait lens feel, medium depth of field, 30-40 steps, CFG 6.5-7.5, sampler DPM++ 2M Karras, style strength medium, seed 60219473

Delta prompt strategy:
1. Hair loses the black length -> append: "long straight black hair falling down the back"
2. Mechanical arm disappears -> append: "chrome-blue segmented mechanical prosthetic arm on the right side"
3. Clothing becomes generic -> append: "simple blue bandeau top and glossy blue-violet high-cut bottoms"
4. Backdrop loses the red flat field -> append: "flat saturated red studio background"
5. Pose becomes casual -> append: "three-quarter fashion pose with a subtle torso twist"
6. Lighting gets moody -> append: "strong even studio lighting and bright chrome highlights"
7. Style becomes realistic -> append: "retro anime sci-fi fashion illustration, smooth shading, not photoreal"
8. Mood becomes aggressive -> append: "calm cool editorial gaze"
9. Draped cloth disappears -> append: "pale draped jacket slipping from one shoulder"
10. Composition loses balance -> append: "mechanical arm occupying the right side of the frame"