Create one finished standalone photographic website background image, 16:9 landscape, approximately 2048 by 1152 pixels. Theme: Modern matter. Scene: A bright cobalt cube with one circular cutout casts a long hard shadow on warm gray stone. Art direction: High-end architectural still-life photography of real tactile materials. Precise hard sunlight, sharp cast shadows, warm off-white, ultramarine, vermilion and brushed aluminum. Confident modernism, no gradients or blob shapes. Composition: retain generous low-detail left space suitable for overlaying website copy, adapting subject placement naturally. This is the actual background artwork, not a website mockup. No text, letters, typography, logos, borders, collages, grids or watermarks. Full-bleed, polished, richly detailed at native resolution.