Poster di viaggio retrò di Istanbul di metà secolo con Hagia Sophia, reso in uno schema a tre colori con sfondo crema, linee nere e accenti arancioni

Prompt

Design a vertical retro mid-century travel poster of [CITY NAME] showcasing [LANDMARK]. Stick to a tight 3-color scheme: cream-toned paper background, black technical line drawing, plus one [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 [COLOR], add small [COLOR] touches on rooftops or street details. Zero gradients allowed.
Typography: large bold sans-serif "[CITY NAME]" at the top in cream, with the city's name in its native language set smaller in cream beneath it.