海辺の更衣施設内部：自然換気と額縁に収まる海

Design a coastal changing facility inspired by Piscinas de Marés. Create minimalist concrete interiors with natural ventilation, filtered daylight, timber benches, framed ocean views, and restrained detailing. Emphasize material honesty, human scale, and the gradual transition from enclosed shelter to the open sea. A dim board-formed concrete corridor with copper-clad timber ceiling, daylight entering only through a continuous slot at the wall head, plain timber benches, a single low opening at the far end framing bright sea, damp salt-marked concrete, strong contrast between dark interior and bright exit, one-point perspective, 28mm lens, interior photography, ultra photorealistic, 8K