Art Nouveau boathouse, luxurious interior, ornate wooden paneling, curved lines, organic shapes, stained glass windows, flowing drapery, velvet sofas, intricately carved furniture, richly patterned rugs, soft warm lighting, morning sunlight streaming through windows, serene lake surroundings, lush greenery, weeping willows, water lilies, subtle ripples on the lake surface, panoramic view, 3/4 composition, cinematic atmosphere, warm color palette, high contrast, detailed textures.