Create a realistic and visually appealing cover for an online course module on "Unveiling Real Estate Client Profiles." The cover should feature a high-quality, photo-realistic image that strongly represents the diverse profiles of real estate clients. Focus on a background that includes a collage of different types of clients (families, young professionals, retirees, investors) interacting with real estate professionals in a modern office environment. Include scenes of client consultations, property viewings, and negotiations. Use a sophisticated color palette that conveys professionalism and opportunity, focusing on dark blue (Navy Blue), white, and gold. The style should be clean, minimalistic, and slightly futuristic, with no characters in the foreground. --ar 16:9  --s 750