Asabeneh/30-Days-Of-JavaScript ? reverse-engineered prompt

Build me a clean, easy to use learning site for a 30 day JavaScript challenge.

It should feel like an online course people can follow day by day, with a simple home page that lists all 30 lessons and lets users jump into each day. Include the intro lesson, then topics like data types, conditionals, arrays, loops, functions, objects, DOM, promises, classes, JSON, and the mini projects at the end. Each lesson page should be readable, nicely formatted, and work well on desktop and mobile.

I also want the site to support multiple languages, since this project has translations. Make it easy to switch between languages and keep the layout consistent across them. Add basic navigation for previous and next day, a search or quick jump if it fits naturally, and make sure code examples and screenshots display clearly.

If you need to, look up current docs online for any best practices, but keep the build simple and focused on learning.