diff --git a/templates/ecommerce/nextjs-monolith/.eslintrc.json b/templates/ecommerce/nextjs-monolith/.eslintrc.json
new file mode 100644
index 0000000..a2569c2
--- /dev/null
+++ b/templates/ecommerce/nextjs-monolith/.eslintrc.json
@@ -0,0 +1,4 @@
+{
+  "root": true,
+  "extends": "next/core-web-vitals"
+}
diff --git a/templates/ecommerce/nextjs-monolith/app/globals.css b/templates/ecommerce/nextjs-monolith/app/globals.css
new file mode 100644
index 0000000..283fef5
--- /dev/null
+++ b/templates/ecommerce/nextjs-monolith/app/globals.css
@@ -0,0 +1,59 @@
+@tailwind base;
+@tailwind components;
+@tailwind utilities;
+
+/* ===== Base Theme: Minimal Clean (Default) ===== */
+:root {
+  --bg-color: #ffffff;
+  --bg-secondary: #f9fafb;
+  --text-color: #111827;
+  --text-secondary: #6b7280;
+  --primary: #2563eb;
+  --primary-hover: #1d4ed8;
+  --border-color: #e5e7eb;
+  --card-bg: #ffffff;
+  --font-family: 'Inter', system-ui, sans-serif;
+  --radius: 0.5rem;
+}
+
+/* ===== Glassmorphism Theme ===== */
+[data-theme="Glassmorphism"] {
+  --bg-color: #0f172a;
+  --bg-secondary: rgba(255, 255, 255, 0.05);
+  --text-color: #f1f5f9;
+  --text-secondary: #94a3b8;
+  --primary: #8b5cf6;
+  --primary-hover: #7c3aed;
+  --border-color: rgba(255, 255, 255, 0.1);
+  --card-bg: rgba(255, 255, 255, 0.08);
+  --font-family: 'Inter', system-ui, sans-serif;
+  --radius: 1rem;
+}
+
+[data-theme="Glassmorphism"] .glass {
+  background: rgba(255, 255, 255, 0.08);
+  backdrop-filter: blur(12px);
+  -webkit-backdrop-filter: blur(12px);
+  border: 1px solid rgba(255, 255, 255, 0.1);
+}
+
+/* ===== Dark Terminal Theme ===== */
+[data-theme="Dark Terminal"] {
+  --bg-color: #000000;
+  --bg-secondary: #0a0a0a;
+  --text-color: #3fb950;
+  --text-secondary: #8b949e;
+  --primary: #3fb950;
+  --primary-hover: #2ea043;
+  --border-color: #21262d;
+  --card-bg: #0d1117;
+  --font-family: 'JetBrains Mono', 'Fira Code', monospace;
+  --radius: 0.25rem;
+}
+
+/* ===== Apply variables globally ===== */
+body {
+  background-color: var(--bg-color);
+  color: var(--text-color);
+  font-family: var(--font-family);
+}
diff --git a/templates/ecommerce/nextjs-monolith/app/layout.tsx b/templates/ecommerce/nextjs-monolith/app/layout.tsx
new file mode 100644
index 0000000..d4c0344
--- /dev/null
+++ b/templates/ecommerce/nextjs-monolith/app/layout.tsx
@@ -0,0 +1,89 @@
+import type { Metadata } from 'next';
+import Link from 'next/link';
+import './globals.css';
+
+export const metadata: Metadata = {
+  title: '{{projectName}} - Store',
+  description: 'A {{variant}} e-commerce store built with Opusify CLI.',
+};
+
+const navLinks = [
+  { label: 'Home', href: '/' },
+  { label: 'Products', href: '/products' },
+  { label: 'Cart', href: '/cart' },
+  { label: 'Account', href: '/account' },
+];
+
+function Navbar() {
+  return (
+    <header className="border-b border-border bg-card">
+      <nav className="max-w-7xl mx-auto px-6 h-16 flex items-center justify-between">
+        <Link href="/" className="text-xl font-bold text-primary">
+          {{projectName}}
+        </Link>
+        <ul className="flex gap-6">
+          {navLinks.map((link) => (
+            <li key={link.href}>
+              <Link
+                href={link.href}
+                className="text-text-secondary hover:text-foreground transition"
+              >
+                {link.label}
+              </Link>
+            </li>
+          ))}
+        </ul>
+      </nav>
+    </header>
+  );
+}
+
+function Sidebar() {
+  return (
+    <aside className="w-64 border-r border-border bg-card min-h-screen p-6">
+      <Link href="/" className="text-xl font-bold text-primary block mb-8">
+        {{projectName}}
+      </Link>
+      <nav>
+        <ul className="space-y-2">
+          {navLinks.map((link) => (
+            <li key={link.href}>
+              <Link
+                href={link.href}
+                className="block px-4 py-2 rounded-theme text-text-secondary hover:bg-bg-secondary hover:text-foreground transition"
+              >
+                {link.label}
+              </Link>
+            </li>
+          ))}
+        </ul>
+      </nav>
+    </aside>
+  );
+}
+
+export default function RootLayout({
+  children,
+}: {
+  children: React.ReactNode;
+}) {
+  const useSidebar = '{{includeSidebar}}' === 'true';
+
+  return (
+    <html lang="en" data-theme="{{design}}">
+      <body>
+        {useSidebar ? (
+          <div className="flex">
+            <Sidebar />
+            <main className="flex-1">{children}</main>
+          </div>
+        ) : (
+          <>
+            <Navbar />
+            <main>{children}</main>
+          </>
+        )}
+      </body>
+    </html>
+  );
+}
diff --git a/templates/ecommerce/nextjs-monolith/app/page.tsx b/templates/ecommerce/nextjs-monolith/app/page.tsx
new file mode 100644
index 0000000..1f7bcc9
--- /dev/null
+++ b/templates/ecommerce/nextjs-monolith/app/page.tsx
@@ -0,0 +1,45 @@
+import Link from 'next/link';
+
+export default function Home() {
+  return (
+    <div className="min-h-screen bg-background">
+      {/* Hero Section */}
+      <section className="max-w-7xl mx-auto px-6 py-24 text-center">
+        <h1 className="text-5xl font-bold tracking-tight text-foreground">
+          Welcome to <span className="text-primary">{{projectName}}</span>
+        </h1>
+        <p className="mt-4 text-xl text-text-secondary max-w-2xl mx-auto">
+          Your <strong>{{variant}}</strong> store, powered by Next.js 14 and scaffolded by Opusify CLI.
+        </p>
+        <div className="mt-8 flex gap-4 justify-center">
+          <Link
+            href="/products"
+            className="rounded-theme bg-primary px-8 py-3 text-white font-medium hover:bg-primary-hover transition"
+          >
+            Browse Products
+          </Link>
+          <Link
+            href="/cart"
+            className="rounded-theme border border-border px-8 py-3 font-medium text-foreground hover:bg-bg-secondary transition"
+          >
+            View Cart
+          </Link>
+        </div>
+      </section>
+
+      {/* Featured Section */}
+      <section className="max-w-7xl mx-auto px-6 py-16">
+        <h2 className="text-2xl font-bold text-foreground mb-8">Featured Products</h2>
+        <div className="grid grid-cols-1 md:grid-cols-3 gap-6">
+          {[1, 2, 3].map((i) => (
+            <div key={i} className="border border-border rounded-theme p-6 bg-card hover:shadow-lg transition">
+              <div className="h-48 bg-bg-secondary rounded-theme mb-4" />
+              <h3 className="font-semibold text-foreground">Product {i}</h3>
+              <p className="text-text-secondary mt-1">$29.99</p>
+            </div>
+          ))}
+        </div>
+      </section>
+    </div>
+  );
+}
diff --git a/templates/ecommerce/nextjs-monolith/app/products/[slug]/page.tsx b/templates/ecommerce/nextjs-monolith/app/products/[slug]/page.tsx
new file mode 100644
index 0000000..46675ee
--- /dev/null
+++ b/templates/ecommerce/nextjs-monolith/app/products/[slug]/page.tsx
@@ -0,0 +1,38 @@
+import Link from 'next/link';
+
+export default function ProductDetailPage({
+  params,
+}: {
+  params: { slug: string };
+}) {
+  return (
+    <div className="max-w-4xl mx-auto px-6 py-12">
+      <Link
+        href="/products"
+        className="text-primary hover:underline mb-6 inline-block"
+      >
+        &larr; Back to Products
+      </Link>
+
+      <div className="grid grid-cols-1 md:grid-cols-2 gap-12 mt-6">
+        {/* Product Image Placeholder */}
+        <div className="h-96 bg-bg-secondary rounded-theme" />
+
+        {/* Product Info */}
+        <div>
+          <h1 className="text-3xl font-bold text-foreground capitalize">
+            {params.slug.replace(/-/g, ' ')}
+          </h1>
+          <p className="text-2xl text-primary font-bold mt-4">$99.99</p>
+          <p className="text-text-secondary mt-4 leading-relaxed">
+            This is a placeholder product page for <strong>{params.slug}</strong>.
+            When connected to a CMS or database, this page will display real product data.
+          </p>
+          <button className="mt-8 w-full rounded-theme bg-primary px-6 py-3 text-white font-medium hover:bg-primary-hover transition">
+            Add to Cart
+          </button>
+        </div>
+      </div>
+    </div>
+  );
+}
diff --git a/templates/ecommerce/nextjs-monolith/app/products/page.tsx b/templates/ecommerce/nextjs-monolith/app/products/page.tsx
new file mode 100644
index 0000000..8459f68
--- /dev/null
+++ b/templates/ecommerce/nextjs-monolith/app/products/page.tsx
@@ -0,0 +1,31 @@
+import Link from 'next/link';
+
+const products = [
+  { slug: 'product-1', name: 'Classic T-Shirt', price: '$29.99' },
+  { slug: 'product-2', name: 'Denim Jacket', price: '$89.99' },
+  { slug: 'product-3', name: 'Running Shoes', price: '$119.99' },
+  { slug: 'product-4', name: 'Leather Bag', price: '$149.99' },
+  { slug: 'product-5', name: 'Sunglasses', price: '$59.99' },
+  { slug: 'product-6', name: 'Watch', price: '$199.99' },
+];
+
+export default function ProductsPage() {
+  return (
+    <div className="max-w-7xl mx-auto px-6 py-12">
+      <h1 className="text-3xl font-bold text-foreground mb-8">All Products</h1>
+      <div className="grid grid-cols-1 md:grid-cols-2 lg:grid-cols-3 gap-6">
+        {products.map((product) => (
+          <Link
+            key={product.slug}
+            href={`/products/${product.slug}`}
+            className="border border-border rounded-theme p-6 bg-card hover:shadow-lg transition block"
+          >
+            <div className="h-48 bg-bg-secondary rounded-theme mb-4" />
+            <h2 className="font-semibold text-foreground">{product.name}</h2>
+            <p className="text-primary font-bold mt-1">{product.price}</p>
+          </Link>
+        ))}
+      </div>
+    </div>
+  );
+}
diff --git a/templates/ecommerce/nextjs-monolith/next.config.js b/templates/ecommerce/nextjs-monolith/next.config.js
new file mode 100644
index 0000000..658404a
--- /dev/null
+++ b/templates/ecommerce/nextjs-monolith/next.config.js
@@ -0,0 +1,4 @@
+/** @type {import('next').NextConfig} */
+const nextConfig = {};
+
+module.exports = nextConfig;
diff --git a/templates/ecommerce/nextjs-monolith/package.json b/templates/ecommerce/nextjs-monolith/package.json
new file mode 100644
index 0000000..5dfa145
--- /dev/null
+++ b/templates/ecommerce/nextjs-monolith/package.json
@@ -0,0 +1,27 @@
+{
+  "name": "{{projectName}}",
+  "version": "1.0.0",
+  "private": true,
+  "scripts": {
+    "dev": "next dev",
+    "build": "next build",
+    "start": "next start",
+    "lint": "next lint"
+  },
+  "dependencies": {
+    "next": "14.2.3",
+    "react": "^18.3.1",
+    "react-dom": "^18.3.1"
+  },
+  "devDependencies": {
+    "@types/node": "^20.12.0",
+    "@types/react": "^18.3.0",
+    "@types/react-dom": "^18.3.0",
+    "autoprefixer": "^10.4.19",
+    "eslint": "^8.57.0",
+    "eslint-config-next": "14.2.3",
+    "postcss": "^8.4.38",
+    "tailwindcss": "^3.4.3",
+    "typescript": "^5.4.5"
+  }
+}
diff --git a/templates/ecommerce/nextjs-monolith/postcss.config.js b/templates/ecommerce/nextjs-monolith/postcss.config.js
new file mode 100644
index 0000000..12a703d
--- /dev/null
+++ b/templates/ecommerce/nextjs-monolith/postcss.config.js
@@ -0,0 +1,6 @@
+module.exports = {
+  plugins: {
+    tailwindcss: {},
+    autoprefixer: {},
+  },
+};
diff --git a/templates/ecommerce/nextjs-monolith/tailwind.config.ts b/templates/ecommerce/nextjs-monolith/tailwind.config.ts
new file mode 100644
index 0000000..c763011
--- /dev/null
+++ b/templates/ecommerce/nextjs-monolith/tailwind.config.ts
@@ -0,0 +1,31 @@
+import type { Config } from 'tailwindcss';
+
+const config: Config = {
+  content: [
+    './app/**/*.{ts,tsx}',
+    './components/**/*.{ts,tsx}',
+  ],
+  theme: {
+    extend: {
+      colors: {
+        background: 'var(--bg-color)',
+        'bg-secondary': 'var(--bg-secondary)',
+        foreground: 'var(--text-color)',
+        'text-secondary': 'var(--text-secondary)',
+        primary: 'var(--primary)',
+        'primary-hover': 'var(--primary-hover)',
+        border: 'var(--border-color)',
+        card: 'var(--card-bg)',
+      },
+      borderRadius: {
+        theme: 'var(--radius)',
+      },
+      fontFamily: {
+        theme: 'var(--font-family)',
+      },
+    },
+  },
+  plugins: [],
+};
+
+export default config;
diff --git a/templates/ecommerce/nextjs-monolith/tsconfig.json b/templates/ecommerce/nextjs-monolith/tsconfig.json
new file mode 100644
index 0000000..e7ff90f
--- /dev/null
+++ b/templates/ecommerce/nextjs-monolith/tsconfig.json
@@ -0,0 +1,26 @@
+{
+  "compilerOptions": {
+    "lib": ["dom", "dom.iterable", "esnext"],
+    "allowJs": true,
+    "skipLibCheck": true,
+    "strict": true,
+    "noEmit": true,
+    "esModuleInterop": true,
+    "module": "esnext",
+    "moduleResolution": "bundler",
+    "resolveJsonModule": true,
+    "isolatedModules": true,
+    "jsx": "preserve",
+    "incremental": true,
+    "plugins": [
+      {
+        "name": "next"
+      }
+    ],
+    "paths": {
+      "@/*": ["./*"]
+    }
+  },
+  "include": ["next-env.d.ts", "**/*.ts", "**/*.tsx", ".next/types/**/*.ts"],
+  "exclude": ["node_modules"]
+}
diff --git a/templates/portfolio/nextjs-monolith/app/globals.css b/templates/portfolio/nextjs-monolith/app/globals.css
index b5c61c9..283fef5 100644
--- a/templates/portfolio/nextjs-monolith/app/globals.css
+++ b/templates/portfolio/nextjs-monolith/app/globals.css
@@ -1,3 +1,59 @@
 @tailwind base;
 @tailwind components;
 @tailwind utilities;
+
+/* ===== Base Theme: Minimal Clean (Default) ===== */
+:root {
+  --bg-color: #ffffff;
+  --bg-secondary: #f9fafb;
+  --text-color: #111827;
+  --text-secondary: #6b7280;
+  --primary: #2563eb;
+  --primary-hover: #1d4ed8;
+  --border-color: #e5e7eb;
+  --card-bg: #ffffff;
+  --font-family: 'Inter', system-ui, sans-serif;
+  --radius: 0.5rem;
+}
+
+/* ===== Glassmorphism Theme ===== */
+[data-theme="Glassmorphism"] {
+  --bg-color: #0f172a;
+  --bg-secondary: rgba(255, 255, 255, 0.05);
+  --text-color: #f1f5f9;
+  --text-secondary: #94a3b8;
+  --primary: #8b5cf6;
+  --primary-hover: #7c3aed;
+  --border-color: rgba(255, 255, 255, 0.1);
+  --card-bg: rgba(255, 255, 255, 0.08);
+  --font-family: 'Inter', system-ui, sans-serif;
+  --radius: 1rem;
+}
+
+[data-theme="Glassmorphism"] .glass {
+  background: rgba(255, 255, 255, 0.08);
+  backdrop-filter: blur(12px);
+  -webkit-backdrop-filter: blur(12px);
+  border: 1px solid rgba(255, 255, 255, 0.1);
+}
+
+/* ===== Dark Terminal Theme ===== */
+[data-theme="Dark Terminal"] {
+  --bg-color: #000000;
+  --bg-secondary: #0a0a0a;
+  --text-color: #3fb950;
+  --text-secondary: #8b949e;
+  --primary: #3fb950;
+  --primary-hover: #2ea043;
+  --border-color: #21262d;
+  --card-bg: #0d1117;
+  --font-family: 'JetBrains Mono', 'Fira Code', monospace;
+  --radius: 0.25rem;
+}
+
+/* ===== Apply variables globally ===== */
+body {
+  background-color: var(--bg-color);
+  color: var(--text-color);
+  font-family: var(--font-family);
+}
diff --git a/templates/portfolio/nextjs-monolith/app/page.tsx b/templates/portfolio/nextjs-monolith/app/page.tsx
index 5368419..b057037 100644
--- a/templates/portfolio/nextjs-monolith/app/page.tsx
+++ b/templates/portfolio/nextjs-monolith/app/page.tsx
@@ -1,22 +1,22 @@
 export default function Home() {
   return (
-    <main className="min-h-screen flex flex-col items-center justify-center px-6 text-center">
+    <main className="min-h-screen flex flex-col items-center justify-center px-6 text-center bg-background text-foreground">
       <h1 className="text-5xl font-bold tracking-tight">
-        Welcome to <span className="text-blue-600">{{projectName}}</span>
+        Welcome to <span className="text-primary">{{projectName}}</span>
       </h1>
-      <p className="mt-4 text-xl text-gray-600 max-w-2xl">
+      <p className="mt-4 text-xl text-text-secondary max-w-2xl">
         A <strong>{{variant}}</strong> portfolio, scaffolded by Opusify CLI.
       </p>
       <div className="mt-8 flex gap-4">
         <a
           href="#projects"
-          className="rounded-lg bg-blue-600 px-6 py-3 text-white font-medium hover:bg-blue-700 transition"
+          className="rounded-theme bg-primary px-6 py-3 text-white font-medium hover:bg-primary-hover transition"
         >
           View Projects
         </a>
         <a
           href="#contact"
-          className="rounded-lg border border-gray-300 px-6 py-3 font-medium hover:bg-gray-50 transition"
+          className="rounded-theme border border-border px-6 py-3 font-medium hover:bg-bg-secondary transition"
         >
           Contact Me
         </a>
diff --git a/templates/portfolio/nextjs-monolith/tailwind.config.ts b/templates/portfolio/nextjs-monolith/tailwind.config.ts
index cbcf2de..c763011 100644
--- a/templates/portfolio/nextjs-monolith/tailwind.config.ts
+++ b/templates/portfolio/nextjs-monolith/tailwind.config.ts
@@ -6,7 +6,24 @@ const config: Config = {
     './components/**/*.{ts,tsx}',
   ],
   theme: {
-    extend: {},
+    extend: {
+      colors: {
+        background: 'var(--bg-color)',
+        'bg-secondary': 'var(--bg-secondary)',
+        foreground: 'var(--text-color)',
+        'text-secondary': 'var(--text-secondary)',
+        primary: 'var(--primary)',
+        'primary-hover': 'var(--primary-hover)',
+        border: 'var(--border-color)',
+        card: 'var(--card-bg)',
+      },
+      borderRadius: {
+        theme: 'var(--radius)',
+      },
+      fontFamily: {
+        theme: 'var(--font-family)',
+      },
+    },
   },
   plugins: [],
 };