aligit56/fullstacklab ? reverse-engineered prompt

Build me a simple front end project for a class lab, with a working calculator page as the main feature.

I want it to feel clean and easy to use, with a display, number buttons, basic math operations, clear, and equals. Keep the design neat and mobile friendly, and make sure the buttons actually work with normal clicks, not just typed input. If it makes sense, organize the code so it is easy to understand and edit later, since this looks like a school project. There is also a Lab2 folder, so if you can set up the calculator there or keep the lab work tidy in separate files, that would be great.

Please use plain web tech and keep it lightweight. If you need to check current browser behavior or best practices, look them up online first.