A static cinematic close-up shot of slow rain droplets hitti...

A static cinematic close-up shot of slow rain droplets hitting and sliding down a clean window at night. Outside the window a soft, out-of-focus glow of city lights, blurred and distant, with no visible street, no cars, no traffic, and no moving objects. Camera is completely still with no motion. No people, no animals, no signage, no text, no logos. Lighting and composition must stay constant throughout. The first frame and last frame must be visually identical so the video can loop seamlessly. Rain motion should be continuous and cyclical without any new scene events. Audio: calm rain sounds with clearly audible raindrops hitting the window glass. No thunder, no wind gusts, no sudden volume changes.