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/css-tree/lib/syntax/node/Dimension.js

@@ -0,0 +1,23 @@
+import { Dimension } from '../../tokenizer/index.js';
+
+export const name = 'Dimension';
+export const structure = {
+    value: String,
+    unit: String
+};
+
+export function parse() {
+    const start = this.tokenStart;
+    const value = this.consumeNumber(Dimension);
+
+    return {
+        type: 'Dimension',
+        loc: this.getLocation(start, this.tokenStart),
+        value,
+        unit: this.substring(start + value.length, this.tokenStart)
+    };
+}
+
+export function generate(node) {
+    this.token(Dimension, node.value + node.unit);
+}