FaizMKhan/Demo-Registration-Page ? reverse-engineered prompt

Build me a demo registration page with a multi step form where people can move through the signup process even if they want to skip some optional fields. The important part is that the form should let users go to the next step without filling every non mandatory field, and then come back later to complete those skipped fields if they want.

I want it to feel like a simple polished registration widget, with clear step navigation, back and next controls, and a way to remember which optional fields were skipped so that can be tracked. Keep it straightforward and easy to use, with a clean layout and basic styling. Use the existing page structure if that helps, and make sure the experience works smoothly in the browser. If you need to check anything, look up current docs online.