Create one finished standalone photographic website background image, 16:9 landscape, approximately 2048 by 1152 pixels. Theme: Earth from above. Scene: Aerial view of chalk-white coastal limestone meeting impossibly clear deep blue sea along a crisp diagonal shoreline. Art direction: Hyperreal high-altitude landscape photography, natural geologic detail and credible colors. Strong abstract composition, no people or buildings, no artificial purple, no text. Photographic natural light, no painterly styling. 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.