Create a realistic and visually appealing cover for an online course module titled "United States Real Estate Financing Fundamentals." The cover should feature a high-quality, photo-realistic image that subtly represents the theme within the context of real estate financing in the United States. Consider using elements such as modern homes, financial documents, keys, skyscrapers, or subtle imagery of the American flag or iconic landmarks. Use a sophisticated color palette that conveys professionalism, stability, and opportunity, focusing on dark blue (Navy Blue), white, and gold. The style should be clean, minimalistic, and slightly futuristic. --ar 16:9  --s 750