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/scope/value.js

@@ -0,0 +1,25 @@
+import getNode from './default.js';
+import expressionFn from '../function/expression.js';
+import varFn from '../function/var.js';
+
+function isPlusMinusOperator(node) {
+    return (
+        node !== null &&
+        node.type === 'Operator' &&
+        (node.value[node.value.length - 1] === '-' || node.value[node.value.length - 1] === '+')
+    );
+}
+
+export default {
+    getNode,
+    onWhiteSpace(next, children) {
+        if (isPlusMinusOperator(next)) {
+            next.value = ' ' + next.value;
+        }
+        if (isPlusMinusOperator(children.last)) {
+            children.last.value += ' ';
+        }
+    },
+    'expression': expressionFn,
+    'var': varFn
+};