Minimalist flat vector travel poster of Lisbon, simplified g

Minimalist flat vector travel poster of Lisbon, simplified geometric shapes of a yellow tram climbing a steep street and the hilltop castle, limited palette of terracotta, teal and cream, a big warm sun circle glowing behind the skyline, subtle paper grain, thin cream border, bold sans-serif title "LISBON" across the bottom with a small tagline "PORTUGAL" beneath it, generous negative space, flat shading with soft long shadows, crisp edges, vintage WPA poster feel. Square 1:1 composition. Avoid: warped or misspelled text, melted buildings, cluttered background, muddy colors, real brand logos.