Prompt de selfie en el espejo del gimnasio (vista trasera)

{ "subject": { "description": "Young woman with an athletic, fit physique taking a mirror selfie. She has long dark brown hair pulled back into a high ponytail with distinct, chunky blonde highlights framing her face (money pieces). Her skin is fair with natural texture. She is wearing a tight black long-sleeve crop top that ends just below the bust, revealing her midriff. On her lower body, she wears grey/taupe seamless ribbed leggings that are pulled high, accentuating a curvy figure with prominent glute development. The fit of the clothing is tight, highlighting body contours.", "anatomical_details": "Preserve exact body proportions: slim waist, developed glutes, and natural spine curvature. Do not normalize anatomy; maintain the specific muscle definition and volume of the glutes and thighs as seen in the reference. Facial features in profile show a straight n