Cheerful Young Woman with Blank Sign

studio portrait of a cheerful young woman with long straight dark hair and black eyeglasses, wearing a bright green turtleneck sweater, smiling warmly while leaning her folded arms on top of a tall vertical blank white rounded-rectangle placard, thick green border around the sign, sign centered in frame with empty copy space, mustard yellow seamless background, clean minimalist commercial advertising composition, soft even studio lighting, subtle shadows, vibrant color contrast, crisp realistic photography, medium shot, straight-on camera angle, 50mm lens look, high detail, smooth backdrop