Title: Skyline
Prompt: Create a responsive offline city skyline poster with a CSS polygon silhouette, warm sunset sky, pale sun, oversized sans-serif typography and a button changing the hour. Inline all code.
Description: An imaginary city is reduced to its rhythm of shapes against the sky.
Visual techniques: polygon skyline, sunset gradient, sun disc, bold typography.
Interaction model: A button toggles a night color treatment.