Underground subway poster, red and black tunnel poster

This first poster proposes a graphic abstraction of the subway as an invisible but structuring network. The colored lines symbolize urban journeys, human connections and life intersections in an underground world. Style: Expressive minimalism inspired by modernist design, with sharp colors (red, black, cream), clean geometric shapes, and a dynamically tense composition. Artistic description: Underground evokes the deconstructed subway map: winding lines, stops punctuated by circles, on a red background symbolizing underground energy. The tall, black typography looms over the composition, like a reminder of the graphic authority of urban networks. The whole vibrates between abstraction and signage, in a strong aesthetic reduced to the essentials.