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/csso/cjs/clean/utils.cjs

@@ -0,0 +1,12 @@
+'use strict';
+
+function hasNoChildren(node) {
+    return !node || !node.children || node.children.isEmpty;
+}
+
+function isNodeChildrenList(node, list) {
+    return node !== null && node.children === list;
+}
+
+exports.hasNoChildren = hasNoChildren;
+exports.isNodeChildrenList = isNodeChildrenList;