diff --git a/src/demo.html b/src/demo.html
index 8b137891..adc972b3 100644
--- a/src/demo.html
+++ b/src/demo.html
@@ -1 +1,174 @@
+<!DOCTYPE html>
+<html lang="en">
+<head>
+    <meta charset="UTF-8">
+    <meta name="viewport" content="width=device-width, initial-scale=1.0">
+    <title>Mobile Shop</title>
+    <link rel="stylesheet" href="styles.css">
+  <style>
+    body {
+    font-family: Arial, sans-serif;
+    margin: 0;
+    padding: 0;
+}
 
+header {
+    background-color: #333;
+    color: white;
+    padding: 1em 0;
+    text-align: center;
+}
+
+header h1 {
+    margin: 0;
+}
+
+nav ul {
+    list-style: none;
+    padding: 0;
+}
+
+nav ul li {
+    display: inline;
+    margin: 0 1em;
+}
+
+nav ul li a {
+    color: white;
+    text-decoration: none;
+}
+
+section {
+    padding: 2em;
+    text-align: center;
+}
+
+.product-list {
+    display: flex;
+    flex-wrap: wrap;
+    justify-content: center;
+}
+
+.product-item {
+    border: 1px solid #ccc;
+    border-radius: 8px;
+    margin: 1em;
+    padding: 1em;
+    width: 200px;
+}
+
+.product-item img {
+    max-width: 100%;
+    height: auto;
+}
+
+footer {
+    background-color: #333;
+    color: white;
+    padding: 1em 0;
+    text-align: center;
+}
+
+form {
+    display: flex;
+    flex-direction: column;
+    align-items: center;
+}
+
+form label {
+    margin-top: 1em;
+}
+
+form input, form textarea {
+    margin-top: 0.5em;
+    padding: 0.5em;
+    width: 100%;
+    max-width: 300px;
+}
+
+form button {
+    margin-top: 1em;
+    padding: 0.5em 1em;
+}
+
+  </style>
+</head>
+<body>
+    <header>
+        <h1>Mobile Shop</h1>
+        <nav>
+            <ul>
+                <li><a href="#home">Home</a></li>
+                <li><a href="#products">Products</a></li>
+                <li><a href="#about">About</a></li>
+                <li><a href="#contact">Contact</a></li>
+            </ul>
+        </nav>
+    </header>
+
+    <section id="home">
+        <h2>Welcome to Our Mobile Shop</h2>
+        <p>Find the latest and greatest mobile phones here!</p>
+    </section>
+
+    <section id="products">
+        <h2>Products</h2>
+        <div class="product-list">
+            <!-- Product items will be injected here by JavaScript -->
+        </div>
+    </section>
+
+    <section id="about">
+        <h2>About Us</h2>
+        <p>We are a leading mobile shop providing the best smartphones at competitive prices.</p>
+    </section>
+
+    <section id="contact">
+        <h2>Contact Us</h2>
+        <form id="contact-form">
+            <label for="name">Name:</label>
+            <input type="text" id="name" name="name" required>
+            <label for="email">Email:</label>
+            <input type="email" id="email" name="email" required>
+            <label for="message">Message:</label>
+            <textarea id="message" name="message" required></textarea>
+            <button type="submit">Send</button>
+        </form>
+    </section>
+
+    <footer>
+        <p>&copy; 2024 Mobile Shop. All rights reserved.</p>
+    </footer>
+
+    <script>
+      document.addEventListener("DOMContentLoaded", function() {
+    const products = [
+        { name: "iPhone 13", price: "$799", image: "https://via.placeholder.com/150" },
+        { name: "Samsung Galaxy S21", price: "$699", image: "https://via.placeholder.com/150" },
+        { name: "Google Pixel 6", price: "$599", image: "https://via.placeholder.com/150" },
+    ];
+
+    const productList = document.querySelector(".product-list");
+
+    products.forEach(product => {
+        const productItem = document.createElement("div");
+        productItem.classList.add("product-item");
+
+        productItem.innerHTML = `
+            <img src="${product.image}" alt="${product.name}">
+            <h3>${product.name}</h3>
+            <p>${product.price}</p>
+        `;
+
+        productList.appendChild(productItem);
+    });
+
+    document.getElementById("contact-form").addEventListener("submit", function(event) {
+        event.preventDefault();
+        alert("Thank you for your message!");
+    });
+});
+
+    </script>
+</body>
+</html>
