Generate one premium website background, horizontal 21:9, highest available native quality. Theme: Editorial analogue photography of rain droplets on a window, with a distant softly blurred city and warm amber street lights. Muted slate blue and smoky gray, fine film grain, layered optical focus. Window rain is real and subtle, no neon cyberpunk.
Scene: A few crisp rain droplets and amber city bokeh concentrated along the right edge and lower right; broad soft slate-blue glass across left two thirds. A faint distant roofline very low.
Emotion: Reassurance, intimacy and quiet urban optimism. Useful for City guides, boutique stays, journals, thoughtful services. Protect deliberate broad quiet negative space for later live website copy, especially Left. Art-directed, aesthetically confident, beautiful natural detail and restrained texture. This is a standalone background asset only, no website layout, words, captions, letters, logos, watermarks, frames or collage grid. No chrome/glass sculptures, futuristic ribbons, toruses, 3D blobs, robots, corporate node diagrams or unrelated props. Keep composition practical for a real website.