Implement countdown timer in index.html

Added countdown timer logic to the HTML file.

Author: arshad831

index.html

@@ -111,8 +111,9 @@ <h2 class="text-4xl md:text-5xl font-extrabold mb-4 text-slate-900 leading-tight
                        <span class="absolute -top-2 -right-2 h-4 w-4 bg-red-500 rounded-full pulse-dot"></span>
                        <i class="fas fa-video mr-2"></i> Join Weekly Call
                     </a>
+                    <!-- Countdown Section -->
                     <div class="text-xs font-bold text-red-600 mt-2 flex items-center gap-1">
-                        <i class="fas fa-clock"></i> Starts in 30 mins • <span class="underline decoration-dotted cursor-help" title="Limited time offer">Free Limited Offer</span>
+                        <i class="fas fa-clock animate-pulse"></i> Free for next <span id="countdown" class="font-mono text-sm ml-1 bg-red-50 px-1 rounded text-red-700 border border-red-100">30:00</span>
                     </div>
                 </div>
             </div>
@@ -193,6 +194,29 @@ <h4 class="text-white font-semibold text-lg mb-2">Decoding Data Science</h4>
 
     <!-- JavaScript Data & Logic -->
     <script>
+        // Countdown Timer Logic
+        function startCountdown(durationInMinutes) {
+            let timer = durationInMinutes * 60;
+            const display = document.querySelector('#countdown');
+            
+            const interval = setInterval(function () {
+                const minutes = parseInt(timer / 60, 10);
+                const seconds = parseInt(timer % 60, 10);
+
+                display.textContent = 
+                    (minutes < 10 ? "0" + minutes : minutes) + ":" + 
+                    (seconds < 10 ? "0" + seconds : seconds);
+
+                if (--timer < 0) {
+                    // Reset loop for demo purposes (or handle expiry)
+                    timer = durationInMinutes * 60;
+                }
+            }, 1000);
+        }
+
+        // Start countdown on load (30 minutes)
+        startCountdown(30);
+
         // Social Share Logic
         function shareSocial(platform) {
             const url = window.location.href;