Create a highly detailed fictional top-view grayscale heightmap-style illustration of a continent, highlighting intricate terrain features. Ensure the landmass is sharply defined, using clear and distinct varying shades of gray to delineate plains and hills in a two-dimensional format. Emphasize lighter shades for the plains compared to the hills. Avoid any blurs or mixed colors. Pay meticulous attention to terrain details, including valleys, ridges, and other topographic elements. Represent the sea as uniformly pure black without any shades. This depiction should be entirely original and imaginative, with no resemblance to real-world maps. | Anything