3 Color Mid Century Minimalist Isometric City Landmark Travel Poster

Vertical mid-century modern travel poster for Lisbon, Portugal, with Belem Tower as the central focal point, strict 3-color limited palette only: cream off-white paper base, sharp clean black technical linework, solid flat azulejo blue as the third accent color. Style: minimalist isometric bird's-eye view, ultra-fine precise hatching details, authentic retro screen-print texture, zero gradients, no color blending at all. Color usage rules: entire sky area filled with solid flat azulejo blue, only small azulejo blue accent details appear on building roofs or street features, all color fills are completely flat and opaque. Text elements: top of the poster features bold thick sans-serif "LISBON" text in cream, directly below it is smaller cream text "LISBOA", no extra text or decorative elements outside the specified design.