Create a highly realistic vertical smartphone selfie portrait of a young East Asian woman with black hair tied back in a low ponytail, soft wispy bangs falling across her forehead, and a few loose side strands framing her face. She has large glossy dark brown eyes, clear fair skin, natural rosy cheeks, subtle pink lips, and a calm gentle expression with a faint closed-mouth smile, looking directly into the camera. She is wearing an oversized light heather gray crewneck sweatshirt with visible ribbed collar and soft cotton texture. The framing is a close upper-body selfie from slightly above eye level, face centered slightly to the right, shoulders visible, with a natural arm-length perspective and mild lens distortion typical of a phone front camera. Background is a simple indoor room with warm beige walls, a corner seam on the right, and a small portion of a neutral fabric sofa at the lower left. Use soft natural window light from the front-left, smooth skin detail without looking plastic, realistic hair flyaways, shallow depth of field, casual candid atmosphere, no jewelry, no text, no watermark, photorealistic quality, vertical 9:16 composition.
