transform the interior spaces into luxurious spa rooms in the same style as the previously designed grand european hotel pool hall each spa room should reflect the same restrained neoclassical design language color palette and material richness walls are smooth painted in pale stone like ivory with subtle vertical recessed panels to create rhythm but without moldings floors are polished ivory marble with subtle black marble inlays framed in brass maintaining a high gloss finish and the geometric elegance of the pool hall ceilings are smooth barrisol surfaces in the same ivory tone optionally with subtle hidden warm lighting to enhance depth and reflections spa treatment areas feature appropriate furniture and staging for a luxury spa individual massage or treatment tables upholstered lounge chairs side tables soft throws neatly folded towels cushions and discreet decorative elements such as vases or ornaments small plants candles or minimalist spa accessories may be included ensuring the interiors feel inviting serene and highly refined wall mosaics where present use the same dark brown with a hint of cherry palette and abstract water inspired motifs echoing the pool hall while remaining suitable for spa environments windows in the spa rooms are treated consistently with the pool hall retaining the right wall placement where applicable with black lacquer frames and floor to ceiling soft curtains in ivory cream or beige fitted exactly to the openings the lighting relies primarily on diffused natural daylight supplemented with discreet hidden warm lighting to emphasize depth and material richness without visible fixtures all spa rooms should maintain symmetry proportion and a layered luxurious feel with a color palette of ivory white black beige brass and dark brown with a hint of cherry producing interiors that are cohesive with the pool hall while appropriate for intimate spa experiences the overall result should feel staged highly realistic and aligned perfectly with the grand european hotel aesthetic