Create a beautiful watercolor painting of a cityscape enveloped in fog, capturing the ethereal quality of the scene. The artwork should feature soft, flowing brushstrokes that blend colors to depict the buildings, with muted tones of gray, blue, and hints of warm colors peeking through the mist. The fog should be represented with translucent washes that gently obscure the lower parts of the structures, creating a dreamy atmosphere. Incorporate elements like trees and streetlights, rendered in a loose, impressionistic style, to enhance the urban environment. The overall composition should evoke a sense of calm and tranquility, inviting viewers to lose themselves in the foggy city. Keywords: "watercolor art," "cityscape fog," "ethereal atmosphere," "soft brushstrokes."