You're an amateur astronomer who keeps forgetting which constellations you've spotted, under what conditions, and from which location. Build a single-page **star-gazing session logger** that lets you record and browse your personal observation history.

Each log entry should capture:
- **Date & time** of the session
- **Location** (free-text, e.g. "backyard", "campsite near Moab")
- **Sky conditions** (clear, partly cloudy, light-polluted, etc. — a quick dropdown or tag)
- **Constellations spotted** (a multi-select or comma-separated list, e.g. Orion, Cassiopeia, Ursa Major)
- **Notes** (optional free-text for memorable moments, equipment used, etc.)

The app must persist all entries in `localStorage` so they survive a page refresh. Display the full list of past sessions in reverse-chronological order, showing a summary card for each one. Users should be able to delete any entry they no longer want.

Style it to feel atmospheric — dark background, star-like accents, subtle typography — so opening the app actually feels like looking up at a night sky.