Miniature city in coffee cup

Create a surreal yet photorealistic image of a {argument name="subject" default="miniature city"} built inside a {argument name="vessel" default="cup of coffee"}. The foam and liquid should form terrain, streets, and tiny glowing buildings, with little bridges and small people moving around. Show steam rising dramatically and warm morning light hitting the scene. Make it whimsical, highly detailed, and visually rich, like a premium commercial concept.