Build a weather card as a single complete HTML file.

Output only the raw HTML file content — no markdown fences, no commentary before or after.

Rules:
- All CSS and JS inline. No external resources; no network requests other than the two API paths below.
- Desktop viewport, 1280x800.
- Read URL query parameters: `lat`, `lon`, `name` (location label), `date` (YYYY-MM-DD). Defaults: 52.52, 13.405, Berlin, today (UTC).
- Fetch weather data from the same-origin API (Open-Meteo compatible, no key):
  - `/api/om/forecast` — parameters and response format identical to api.open-meteo.com/v1/forecast (today and future dates)
  - `/api/om/archive` — identical to archive-api.open-meteo.com/v1/archive (past dates)
- Request with query parameters: `latitude`, `longitude`, `daily=temperature_2m_max,temperature_2m_min,weather_code`, `hourly=temperature_2m`, `timezone=UTC`, `temperature_unit=celsius`, and `start_date`/`end_date` both set to the requested date.
- Display, in Celsius: the location name, the date, that date's maximum and minimum temperature, the weather condition, and the hourly temperatures for that date.
- If the data cannot be loaded, the page must say so.