A photorealistic full-body portrait of a smiling young couple

A photorealistic full-body portrait of a smiling young couple standing on a cobblestone city street in autumn, both wearing matching deep red quilted jackets; the woman in a cream turtleneck sweater, slim blue jeans and black ankle boots holding a takeaway coffee cup, the man in a dark hoodie, black jeans and sneakers holding a small maroon quilted backpack by the strap, warm golden-hour light casting soft, flattering shadows, rich autumn foliage in orange and amber tones in the softly blurred background, historic stone building facade and vintage lampposts lining the sidewalk, slight 3/4 frontal angle, natural candid pose with friendly eye contact, crisp textures on fabric and cobblestones, shallow depth of field, high resolution, warm color grading, high detail on faces and clothing, subtle film grain for a cozy, lifestyle editorial feel. Insert discreet watermark in the lower right corner of the image, vertical text (rotated 90°), written "aipromptlabs.online", Calibri Light font, white color with low opacity (semi-transparent), medium size. Extreme sharpness on the face, fabric texture and typography of the letters. Shot on Canon EOS R5, 50mm f/2.8, studio light.