Grey sporty teenage girl taking a selfie in front of the mirror, showcasing the perfect waist to hip ratio

Young woman with a curvy, athletic physique, light tan skin tone, and dark brunette hair styled in a high, messy ponytail with loose strands framing the face. She is wearing a matching grey heather athleisure set consisting of a racerback sports bra with a thick elastic underband and tight dolphin-hem shorts. The fit emphasizes a narrow waist and voluminous, prominent glutes and hips, maintaining exact anatomical proportions from the reference. The upper back shows subtle muscular definition.