Build portfolio site with Next.js, Tailwind CSS, and dark mode

- Add CLAUDE.md with project conventions and architecture notes
- Create Navbar (sticky, backdrop blur, mobile menu) and Footer
- Build homepage sections: Hero, FeaturedProjects, Skills, CurrentWork, CallToAction
- Add /projects, /about, and /contact pages
- Create reusable ProjectCard and Badge components
- Centralise project data in content/projects.json with featured flag
- Add class-based dark mode toggle (default dark, persisted to localStorage)
- Refactor globals.css: remove conflicting prefers-color-scheme media query
- Fix two-instance ThemeToggle sync bug in Navbar
- Fix key={index} anti-pattern in timeline, stale closure in setOpen

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

app/globals.css

@@ -1,26 +1,11 @@
 @import "tailwindcss";
-
-:root {
-  --background: #ffffff;
-  --foreground: #171717;
-}
+@custom-variant dark (&:is(.dark *));
 
 @theme inline {
-  --color-background: var(--background);
-  --color-foreground: var(--foreground);
   --font-sans: var(--font-geist-sans);
   --font-mono: var(--font-geist-mono);
 }
 
-@media (prefers-color-scheme: dark) {
-  :root {
-    --background: #0a0a0a;
-    --foreground: #ededed;
-  }
-}
-
 body {
-  background: var(--background);
-  color: var(--foreground);
-  font-family: Arial, Helvetica, sans-serif;
+  font-family: var(--font-sans);
 }