Retro City Travel Poster Design

Design a vertical retro mid-century travel poster of {argument name="city name" default="[CITY NAME]"} showcasing {argument name="landmark" default="[LANDMARK]"}. Stick to a tight 3-color scheme: cream-toned paper background, black technical line drawing, plus one {argument name="accent color" default="[COLOR]"} accent.
Aesthetic: minimalist isometric top-down aerial perspective with very fine cross-hatching and silkscreen print grain.
Color rules: fill the entire sky in flat solid {argument name="accent color" default="[COLOR]"}, add small {argument name="accent color" default="[COLOR]"} touches on rooftops or street details. Zero gradients allowed.
Typography: large bold sans-serif "{argument name="city name" default="[CITY NAME]"}" at the top in cream, with the city's name in its native language set smaller in cream beneath it.