Implement core website structure and pages

- Create responsive homepage with hero section, features, and animations
- Add adventures page with filterable adventure grid
- Add routes page with downloadable GPX route library
- Implement Header component with responsive navigation
- Set up Tailwind CSS with custom adventure theme
- Fix Next.js configuration and add Unsplash image support
- Add Framer Motion animations throughout
- Install and configure all dependencies successfully

Features added:
- Modern UI with gradient backgrounds and glass morphism
- Mobile-responsive design
- Interactive animations and hover effects
- Adventure browsing and filtering
- Route discovery and download system
- Professional motorcycle adventure branding

next-env.d.ts

@@ -2,4 +2,4 @@
 /// <reference types="next/image-types/global" />
 
 // NOTE: This file should not be edited
-// see https://nextjs.org/docs/basic-features/typescript for more information.
+// see https://nextjs.org/docs/app/building-your-application/configuring/typescript for more information.