Young Adult Athletic Woman with Pronounced Muscular Arms and Defined

{   "subject": {     "description": "A young adult athletic woman with pronounced muscular arms and defined abs, wearing gym streetwear, standing against a plain dark gray wall in a realistic social media photo.",     "age": "early 20s",     "expression": {       "eyes": {         "look": "calm, focused",         "energy": "cool and controlled",         "direction": "toward the camera, slightly downward"       },       "mouth": {         "position": "closed, slight pout",         "energy": "neutral, restrained"       },       "overall": "quiet confidence, post-workout calm"     },     "face": {       "preserve_original": true,       "makeup": "minimal or no-makeup look, natural skin"     },     "hair": {       "color": "light blonde",       "style": "tied back in a low ponytail with a few loose front strands under the cap",       "effect": "slightly messy gym hair, natural texture"     },     "body": {       "frame": "lean, strong, visibly muscular upper body",       "waist": "tight waist with sharp oblique lines",       "chest": "athletic, supported by a tight crop top",       "legs": "mostly covered by loose sweatpants",       "skin": {         "visible_areas": [           "face",           "neck",           "shoulders",           "arms",           "midriff"         ],         "tone": "fair to light",         "texture": "smooth with subtle natural pores, slight workout sheen",         "lighting_effect": "soft highlights on shoulders, arms, and abs"       }     },     "pose": {       "position": "center frame",       "base": "standing with a slight hip pop and gentle torso twist, arms relaxed with one arm slightly behind the body",       "overall": "subtle S-curve posture emphasizing shoulders and abs"     },     "clothing": {       "top": {         "type": "black sleeveless fitted crop athletic top",         "color": "matte black",         "details": "tight fit, high neckline, exposes midriff",         "effect": "sculpts the torso and highlights muscle definition"       },       "bottom": {         "type": "baggy dark sweatpants",         "color": "black or very dark navy",         "details": "loose fit, elastic waist, visible white drawstring",         "effect": "street-gym silhouette with contrast drawstring"       }     }   },   "accessories": {     "headwear": "black baseball cap with curved brim",     "jewelry": "thin gold chain necklace with a small pendant",     "device": "large black over-ear headphones",     "prop": "black training glove or wrist wrap on one hand"   },   "photography": {     "camera_style": "realistic smartphone social media photo, gym portrait vibe",     "angle": "slightly low angle, straight-on framing",     "shot_type": "three-quarter body portrait (head to below hips), subject fills most of the vertical frame",     "aspect_ratio": "9:16",     "texture": "sharp but natural, mild noise, realistic skin and fabric texture",     "lighting": "soft indoor overhead lighting with gentle shadows, no harsh sp