Golden Labrador Retriever Holding a Blank Card in a Studio Portrait

photorealistic studio portrait of a golden Labrador retriever sitting upright, centered front-facing pose, floppy ears spread slightly outward, warm honey-gold short fur with fine visible hair texture, large glossy brown eyes looking directly at camera, pink-brown nose, dog gently holding a blank white rectangular card in its mouth, card covering lower muzzle and chest area, minimal clean light gray background with subtle paper texture, lots of negative space above the dog's head, soft even diffused studio lighting, natural catchlights in eyes, sharp focus on face and fur, shallow depth of field, calm sweet expression, high-resolution commercial pet photography, 85mm lens, neutral tones, realistic detail