Gentle blue washes capture London's Tower Bridge at dawn

{
  "prompt": "Create a 3:4 vertical warm minimal watercolor city poster for [CITY_NAME] with a handmade postcard feeling. Place '[CITY_NAME]' at the top and '[ENGLISH_TEXT]' below it in a smaller handwritten/editorial style. Illustrate one peaceful city-specific scene featuring one iconic landmark, one or two small people enjoying everyday life, and local details: [LOCAL_DETAIL_1], [LOCAL_DETAIL_2], [LOCAL_DETAIL_3]. Capture the city's unique atmosphere with one visual anchor, one everyday lifestyle moment, one cultural or environmental detail, and one calm composition. Use delicate pencil sketch lines, soft brown outlines, translucent watercolor washes, subtle granulation, gentle color bleeding, cold-pressed paper texture, soft shadows, and slightly uneven painted edges. Color palette: 75% soft blues (sky blue, aqua, powder blue, turquoise, blue-gray), 15% white/off-white, and 10% pale yellow accents. Keep the background clean and airy, place the main subject slightly below center, and add a few tiny watercolor doodles such as hearts, stars, flowers, leaves, or clouds. The mood should be peaceful, cheerful, cozy, refreshing, and emotionally warm, uniquely representing [CITY_NAME]. Avoid photorealism, 3D, vector style, glossy textures, oversaturated colors, crowded scenes, complex perspectives, dramatic lighting, and landmark collages.",
  "aspect_ratio": "3:4",
  "style": "warm minimal watercolor, handmade postcard, soft illustration",
  "quality": "high",
  "color_palette": "aqua blue summer",
  "negative_prompt": "photorealistic, 3D render, vector art, hard edges, glossy, oversaturated, dark mood, crowded composition, realistic anatomy, dramatic lighting, busy collage, heavy shadows"
}