Create a dreamy mixed media collage that portrays a cityscape shrouded in fog. The artwork should blend various materials, including watercolor washes, textured papers, and digital prints, to create a surreal atmosphere. Use soft, pastel colors to evoke a sense of calm and serenity, with the fog gently enveloping the buildings and streets. Incorporate whimsical elements like floating clouds and abstract shapes that suggest movement through the fog. The foreground can feature stylized figures, such as a couple walking hand-in-hand, their outlines softened by the mist. This collage should invite viewers into a dreamlike world, where the fog transforms the familiar city into a magical landscape, encouraging exploration and imagination.