Create a realistic full-body photo of a young adult woman standing casually inside a modern library or university building. She is standing next to a large concrete pillar, with a relaxed and natural pose. She looks directly at the camera with a soft, friendly smile. She has long, slightly wavy brown hair that falls naturally over her shoulders, with a few loose strands around her face. Her makeup is very light and natural, and her skin should look realistic with normal texture and subtle imperfections. She is wearing a loose cream-colored knitted sweater with long sleeves and a simple black midi skirt. She has a black backpack hanging from one shoulder, with one hand naturally holding the strap. She is wearing dark ankle socks and chunky white sneakers. The background looks like a modern university library or study space, with bookshelves on the left, exposed concrete architecture and warm ceiling lights. The area behind her is softly blurred, while the woman remains in sharp focus. Natural sunlight comes through the windows and creates soft patches of light and shadow across the floor. The overall feeling should be simple, cozy, natural and candid, like a real lifestyle photograph taken with a professional camera rather than a heavily edited fashion shoot. Use realistic proportions, natural body posture, authentic hair and skin texture, realistic clothing fabric and natural lighting. Keep the image clean and photorealistic with a warm, soft color tone. Vertical 4:5 composition, full-body framing, realistic photography, shallow depth of field, natural background blur, high detail, no text, no logo, no watermark.