{   "master_prompt": {     "scene_type": "ultra-realistic fitness lifestyle photoshoot",     "subject": {       "type": "male model (same as reference)",       "expression": "focused, confident, determined look",       "pose": "leaning slightly forward with hands resting on knees after a workout set, or standing upright holding dumbbells with strong posture",       "energy": "powerful, disciplined, athletic presence"     },     "wardrobe": {       "top": "fitted performance compression t-shirt in charcoal or deep navy",       "bottom": "tapered athletic joggers or structured gym shorts in black",       "footwear": "premium training sneakers in neutral tones",       "accessories": "minimal sports watch, subtle wrist wraps",       "styling_notes": "light natural sweat effect on skin, defined physique emphasis, clean hairstyle"     },     "location": {       "setting": "modern high-end gym interior",       "environment_details": "free weights area, matte black dumbbells, squat rack, textured rubber flooring, subtle industrial walls",       "atmosphere": "motivating, premium fitness environment",       "background_activity": "softly blurred gym equipment for depth"     },     "lighting": {       "type": "dramatic gym lighting",       "quality": "controlled overhead lighting with directional side highlights",       "effects": "muscle definition shadows, subtle rim light outlining physique, cinematic contrast",       "mood": "intense yet refined"     },     "camera": {       "angle": "slightly low angle for strength emphasis",       "focus": "sharp focus on subject’s face and upper body",       "depth_of_field": "shallow depth for editorial sports campaign feel",       "resolution": "8K ultra high-definition",       "style": "luxury athletic brand campaign photography"     },     "color_palette": {       "dominant_colors": ["charcoal", "black", "steel grey", "deep navy"],       "mood": "bold, powerful, masculine, premium fitness aesthetic"     }   } }