Build "Galerie Nocturne", a walk-through virtual museum room in CSS 3D. A corridor with a polished marble floor (CSS gradients plus reflection), warm walls (#e9e2d6), soft ceiling spotlights casting pools of light, and eight framed paintings hung on the side walls. Each painting is an original generative artwork rendered on canvas and seeded so it is stable: a colour-field piece, a primary-colour grid, a geometric abstraction, a pointillist sunset, a flow field, an op-art piece, an ink landscape and a gold mosaic. Gilded or slim black frames with museum placards (title, fictional artist, year, medium). Navigation: arrow keys/WASD or on-screen buttons move the camera along the corridor with smooth easing; clicking a painting walks up to it and shows it frontally with a detail card; Escape steps back. A small floor-plan minimap shows your position. Typography: a museum-grade sans for placards and a classic serif for the title. On phones, fall back to a swipeable wall of the same framed works.
