VertexCorporation/adminsite ? reverse-engineered prompt

Build me a clean admin website for Vertex that feels simple and professional. It should let an admin log in, see a dashboard, and manage the main things a company admin panel would need, like viewing records, adding new items, editing details, and deleting stuff safely with confirmation.

Make it work as a real site with a front end, some styling, and the basic server side pieces needed to support it. If Firebase is useful for auth or data, use the existing config and wire it up properly. I want it to be easy to use, responsive, and not look cluttered.

Please also include a sensible landing or login screen, a main dashboard layout, and a few example sections so it feels like a complete admin panel instead of a blank starter. If anything is unclear, make the best practical choice and look up current docs online if you need to.