Cheerful Young Woman with Blank Poster Board

studio portrait photo of a cheerful young woman with long glossy black hair, warm light skin, bright smile, natural makeup, wearing a fitted white ribbed tank top and dark pants, holding a large blank vertical white poster board in front of her torso, left hand gripping the top edge, right hand pointing at the empty sign, head slightly tilted, looking directly at camera, centered upper-body framing with poster occupying lower half of image, clean neutral gray seamless background, soft even studio lighting with gentle highlights on face and hair, realistic skin texture, crisp focus, commercial advertising mockup style, 85mm portrait lens, shallow depth of field, high-resolution photorealism