Converts the website from a single-page design with anchor links to a full multi-page application. This change improves site organization, navigation, and scalability.
- Adds new top-level pages: `/news`, `/events`, and `/about`.
- Introduces a new section for the 40th Anniversary at `/40th-anniversary`, including a proposal sub-page.
- Updates the default layout with a new navigation menu, a promotional banner, social links, and page transitions.
