Design a warm and inviting powder room in Warm Minimalism style, featuring a sleek, white subway tile backsplash with a subtle, warm gray grout. The walls are painted a soothing, creamy beige (Benjamin Moore's "Sand Dune"), and the floors are made of rich, dark hardwood (walnut or espresso-stained). A minimalist, wall-mounted, oval-shaped sink in a polished brass finish adds a touch of sophistication, while a recessed, LED-lit mirror above the sink provides ample illumination. The space is illuminated by a warm, brass-toned sconce and a small, pendant-style light fixture above the sink, creating a cozy and intimate atmosphere.