Weather app hitting a real API

The task

Build a weather app in a single HTML file that calls the free Open-Meteo API (no key). A city search with geocoding, current conditions with an animated weather icon, an hourly strip for today, and a 7-day forecast. Handle loading and error states, use the browser's geolocation on load with a graceful fallback, and support °C/°F toggle. Clean, glanceable design.