whoishusni/pajak-uin ? reverse-engineered prompt

Build me a simple web page for Perhitungan Pajak UIN Datokarama Palu.

I want a clean, easy to use tax calculator that lets users enter the needed values, see the tax amount calculated instantly, and view the result clearly on the page. Keep it lightweight and friendly for non technical users, with a neat layout that feels appropriate for an official university tool.

Use the existing logo and favicon if they fit, and make the page look polished on desktop and mobile. If anything about the calculation logic is unclear, make the interface flexible so it can be updated easily later, and look up current docs online if you need to.