serene minimaluxe spa bathroom with freestanding tub and rain shower in monochromatic palette

serene minimaluxe spa bathroom freestanding tub rain shower monochromatic palette relaxation luxury design modern contemporary sleek tranquil calm soothing elegant minimalism clean lines simplicity peaceful comfort harmony like serenity stylish black and white interiors zen chic whitespace neutral colors wellness spacious free standing scandinavian bathtub water feature