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/plugins/download-button/prism-download-button.js

@@ -0,0 +1,20 @@
+(function () {
+
+	if (typeof Prism === 'undefined' || typeof document === 'undefined' || !document.querySelector) {
+		return;
+	}
+
+	Prism.plugins.toolbar.registerButton('download-file', function (env) {
+		var pre = env.element.parentNode;
+		if (!pre || !/pre/i.test(pre.nodeName) || !pre.hasAttribute('data-src') || !pre.hasAttribute('data-download-link')) {
+			return;
+		}
+		var src = pre.getAttribute('data-src');
+		var a = document.createElement('a');
+		a.textContent = pre.getAttribute('data-download-link-label') || 'Download';
+		a.setAttribute('download', '');
+		a.href = src;
+		return a;
+	});
+
+}());

node_modules/prismjs/plugins/download-button/prism-download-button.min.js

@@ -0,0 +1 @@
+"undefined"!=typeof Prism&&"undefined"!=typeof document&&document.querySelector&&Prism.plugins.toolbar.registerButton("download-file",(function(t){var e=t.element.parentNode;if(e&&/pre/i.test(e.nodeName)&&e.hasAttribute("data-src")&&e.hasAttribute("data-download-link")){var n=e.getAttribute("data-src"),a=document.createElement("a");return a.textContent=e.getAttribute("data-download-link-label")||"Download",a.setAttribute("download",""),a.href=n,a}}));