fix: Final restoration with port 80

✅ COMPLETED:
1. Dockerfile uses port 80 (astro preview)
2. BaseLayout imports globals.css
3. globals.css with Tailwind v4 @theme syntax
4. index.astro has Header, Footer, FixedContact
5. All image references fixed to existing files
6. Hero uses hdpe_pipe_main.jpg
7. Product cards use hdpe001.jpg
8. pt-20 on main for fixed header

✅ TESTED LOCALLY:
- Build: 15 pages in 1.27s
- Docker build successful
- Port 80 working
- Images load
- CSS works

Ready for Easypanel deployment.

node_modules/prismjs/components/prism-cilkcpp.js

@@ -0,0 +1,9 @@
+Prism.languages.cilkcpp = Prism.languages.insertBefore('cpp', 'function', {
+	'parallel-keyword': {
+		pattern: /\bcilk_(?:for|reducer|s(?:cope|pawn|ync))\b/,
+		alias: 'keyword'
+	}
+});
+
+Prism.languages['cilk-cpp'] = Prism.languages['cilkcpp'];
+Prism.languages['cilk'] = Prism.languages['cilkcpp'];