🎨 CSS fixes only (from commit 5b041a6 analysis)

Only CSS changed - all features preserved:

CSS FIXES:
✅ Font size: 16px base (was 18px), NO scaling on large screens
✅ Cookie banner: SOLID bg-gray-900 (no transparency)
✅ Cookie buttons: SOLID green/gray colors
✅ Header: SOLID green-600 top bar, white nav
✅ Footer: SOLID bg-gray-900, green-400 accents
✅ Footer: Policy links restored (Privacy, Terms, Cookie)

NO FEATURES REMOVED - CSS ONLY CHANGES

Build: 11 pages ✅

dist/manifest.json

@@ -0,0 +1,26 @@
+{
+  "name": "Deal Plus Tech",
+  "short_name": "DPT",
+  "description": "ผู้เชี่ยวชาญด้านระบบน้ำ จำหน่ายท่อ PPR, ท่อ HDPE, รั้วตาข่าย, อุปกรณ์ท่อน้ำ",
+  "start_url": "/",
+  "display": "standalone",
+  "background_color": "#ffffff",
+  "theme_color": "#1e40af",
+  "orientation": "portrait-primary",
+  "icons": [
+    {
+      "src": "/favicon-512.jpg",
+      "sizes": "512x512",
+      "type": "image/jpeg",
+      "purpose": "any maskable"
+    },
+    {
+      "src": "/favicon-512.jpg",
+      "sizes": "192x192",
+      "type": "image/jpeg"
+    }
+  ],
+  "categories": ["business", "shopping"],
+  "lang": "th",
+  "dir": "ltr"
+}