Studio Birthday Portrait Prompt for Girls

Create a photorealistic full-body studio portrait of the same girl from the reference photo, shot inside a professional photography studio. She stands centered on a clean seamless pastel pink paper backdrop that rolls down from a backdrop stand and curves onto the studio floor with no wall lines, no windows, no room furniture and no door visible anywhere. A cluster of silver and pastel pink balloons floats beside her and a small round cake pedestal with a mini cake stands on the floor nearby. She wears a pastel pink skater dress with white heels, light earrings and soft curls, standing still in a grounded pose with both feet planted on the seamless floor, both hands fully visible with five natural fingers each, one hand holding a balloon ribbon with a natural closed grip and no string cutting through fingers. Render strict correct anatomy with exactly two arms, two hands, two legs and two feet, natural joints and realistic proportions, no motion blur on the body. Studio lighting only: large softbox key from front-left, white fill reflector from front-right, subtle hair light from behind, soft contact shadow under her feet on the paper. Show a black softbox stand edge softly blurred at the frame edge to sell the studio look. Frame head to toe with margin above head and below feet. Shot on Sony Alpha A7 III with 85mm f/1.8 lens, sharp eyes, natural skin texture, crisp dress fabric. Finish with bright balanced studio tones and subtle film grain. Keep face same as reference, not CGI, not illustration. Strictly avoid extra fingers, fused fingers, deformed hands or feet, extra limbs, strings passing through fingers, living-room background, bedroom background, outdoor background and plastic skin.