现代健身房中，带纹身者的全身镜自拍

{
  "canvas": {
    "aspect_ratio": "3:4",
    "resolution_target": "Ultra-HD",
    "color_palette": ["Black", "Cool White", "Platinum", "Wood Tones"]
  },
  "subject": {
    "identity": {
      "name": "{argument name="subject name" default="Sydney Sweeney"}",
      "reference_fidelity": 1.0
    },
    "physical_attributes": {
      "hair": {
        "color": "Platinum blonde",
        "roots": "Visible dark/natural",
        "style": "Falling over shoulders"
      },
      "expression": "Neutral, confident",
      "body_art": {
        "style": "Black and grey realism",
        "motifs": ["Floral patterns", "Portraits"],
        "placement": ["Arms", "Chest", "Stomach", "Legs"]
      }
    },
    "wardrobe": {
      "top": "Black sports bra, keyhole cutout detail",
      "bottom": "Tight black gym shorts",
      "footwear": "Chunky black and white sneakers",
      "hosiery": "Black crew socks, white heavy metal graphics"
    },
    "interaction": {
      "primary_hand": "Holding silver iPhone 16 Pro Max",
      "secondary_hand": "Holding black reusable water bottle",
      "pose": "Full-body mirror selfie, standing orientation"
    }
  },
  "environment": {
    "location": "Modern gym interior",
    "surfaces": {
      "floor": "Light wood laminate",
      "walls": "Large-scale floor-to-ceiling mirror"
    },
    "background_assets": [
      "Rows of cardio equipment",
      "Reflections of the gym interior",
      "Geometric gym architecture"
    ],
    "lighting": {
      "source": "Overhead recessed LED",
      "temperature": "Cool-toned",
      "distribution": "Even, bright, minimal shadows"
    }
  },
  "technical_directives": {
    "photography_style": "Candid smartphone selfie",
    "lens_simulation": "Wide-angle mobile lens",
    "post_processing": "Cinematic HDR, sharp focus, low grain",
    "framing": "Full-body"
  }
}