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[Subject] One young adult male-coded futuristic character seen from behind, standing near the front edge of a concrete rooftop with both arms stretched wide. He has short spiky white hair, a slim athletic build, light skin, and a black fitted short-sleeve shirt. He wears loose silver-gray reflective cargo pants with soft folds and dark low-profile shoes. In front of him hovers one giant humanoid robotic figure, several stories tall, with a dark metallic body, broad shoulders, glowing cyan circular eyes, and a radiant blue energy hub mounted behind the head like a mechanical halo with multiple spoke-like arms.

[Environment] Dense futuristic city skyline at golden hour, viewed from a high rooftop. Midground and background filled with tall rectangular buildings, rooftops, distant towers, and atmospheric haze. The sky is bright blue with large sunlit cumulus clouds. Low warm sunlight breaks through the buildings from the lower right side, creating strong sun rays and haze. Rooftop foreground includes rough concrete, weathered parapet walls, and hard urban textures.

[Composition/Camera] Vertical frame, wide environmental shot, camera placed slightly behind and above the human figure, with a strong Dutch angle tilt. The human subject is centered in the lower middle of the frame, acting as a silhouette anchor, while the colossal robot occupies the upper center. Emphasize scale contrast between small human and giant machine. Keep deep spatial layers, long city depth, and open sky in the top-right portion. Preserve the dramatic rooftop edge and diagonal city lines created by the tilt.

[Lighting] Warm golden-hour backlight and side light from the lower right, creating rim light around the character's hair, shoulders, and pants folds. Cool cyan emissive light from the robot's eyes and halo mechanism adds sci-fi contrast. Soft atmospheric haze diffuses the distance. Strong volumetric sun rays pass across the city, with moderate shadow density and reflective highlights on the metallic figure and satin-like pants.

[Style/Rendering] Cinematic sci-fi concept art with high-detail digital painting realism, crisp architectural rendering, atmospheric perspective, subtle bloom around glowing blue lights, realistic cloud rendering, and dramatic blockbuster scale. Clean sharp focus across most of the frame, mild filmic contrast, slightly stylized but grounded textures, no cartoon simplification.

[Detail constraints] Do not add or remove characters or buildings. Keep exactly one rooftop human and one giant hovering robot. Match the behind-the-back pose, outstretched arms, white hair, black shirt, silver-gray pants, rooftop ledge placement, Dutch angle skyline, blue sky with thick clouds, cyan robotic glow, and golden sun rays. Keep background consistent with a dense futuristic city and preserve the scale relationship.

Negative prompt: extra people, front-facing character, different hairstyle, helmet, cape, weapons, vehicles in foreground, flying drones around the robot, additional robots, fantasy castle architecture, night scene, rain, heavy fog, neon magenta lighting, low-detail buildings, cropped feet, cropped robot head, symmetrical straight horizon, anime cel shading, blurry image, overexposed sky, duplicated limbs, malformed hands.

Suggested parameters: aspect ratio 9:16, lens 24mm wide-angle feel, deep depth of field, 30-40 steps, CFG/style strength 6.5-8, sampler DPM++ 2M Karras or equivalent, seed suggestion 184297531.

Delta prompt strategy:
1. If the rooftop tilt becomes too straight: add "strong Dutch angle rooftop city composition, diagonal skyline".
2. If the robot becomes too small: add "colossal towering humanoid robot dominating the skyline, several stories tall".
3. If the main character turns toward camera: add "character seen strictly from behind, back to camera, arms spread outward".
4. If the hair color drifts: add "short spiky white hair with bright rim light".
5. If the pants lose the metallic sheen: add "loose silver-gray reflective cargo pants with soft highlights".
6. If the sky becomes too dark or stormy: add "bright blue sky with large sunlit cumulus clouds".
7. If the light loses the warm sci-fi contrast: add "golden-hour sunlight with cyan robotic glow contrast".
8. If city depth collapses: add "layered dense futuristic skyline with deep atmospheric perspective".
9. If the robot halo changes shape: add "glowing cyan circular energy hub behind the robot head with radial mechanical spokes".
10. If the rooftop edge disappears: add "character standing at the front edge of a weathered concrete rooftop".