Black and White Brutalist Stairwell Porthole Portrait

Black and white fine-art architectural portrait photography, vertical 4:5 portrait format. A perfectly circular porthole-shaped cutout reveals a brutalist concrete stairwell, while everything outside the circle is flat, solid near-black charcoal (#161616), with a thin crisp white rectangular border line inset a few millimeters from the frame edge. The circle sits slightly above center, with the thick, weathered concrete ring edge visible on the left side. Inside the circle: wide concrete steps rising diagonally from left to right, a slim dark metal handrail running parallel along the diagonal…