diff --git a/dark.html b/dark.html
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+++ b/dark.html
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+<!DOCTYPE html>
+<html lang="en">
+<head>
+    <meta charset="UTF-8">
+    <meta name="viewport" content="width=device-width, initial-scale=1.0">
+    <title>Dark/Light Theme Toggle</title>
+    <style>
+        /* Default Light Theme */
+        :root {
+            --background-color: #ffffff;
+            --text-color: #000000;
+        }
+
+        /* Dark Theme */
+        .dark-mode {
+            --background-color: #121212;
+            --text-color: #ffffff;
+        }
+
+        body {
+            background-color: var(--background-color);
+            color: var(--text-color);
+            font-family: Arial, sans-serif;
+            transition: background-color 0.3s, color 0.3s;
+        }
+
+        .theme-toggle-btn {
+            position: absolute;
+            top: 20px;
+            right: 20px;
+            padding: 10px 20px;
+            cursor: pointer;
+            background-color: var(--text-color);
+            color: var(--background-color);
+            border: none;
+            border-radius: 5px;
+            transition: background-color 0.3s, color 0.3s;
+        }
+    </style>
+</head>
+<body>
+
+    <h1>Dark/Light Theme Toggle</h1>
+    <p>This is an example of switching between dark and light modes using a toggle button.</p>
+    <button class="theme-toggle-btn" id="theme-toggle">Toggle Theme</button>
+
+    <script>
+        const toggleButton = document.getElementById('theme-toggle');
+        const body = document.body;
+
+        toggleButton.addEventListener('click', () => {
+            body.classList.toggle('dark-mode');
+            updateButtonText();
+        });
+
+        function updateButtonText() {
+            if (body.classList.contains('dark-mode')) {
+                toggleButton.textContent = 'Switch to Light Mode';
+            } else {
+                toggleButton.textContent = 'Switch to Dark Mode';
+            }
+        }
+
+        // Initialize button text
+        updateButtonText();
+    </script>
+
+</body>
+</html>
