Update talkDetail.html

talkDetail.html

@@ -10,10 +10,13 @@
             margin: 0;
             padding: 20px;
             background-color: #f4f4f4;
+            height: 100vh;
+            display: flex;
+            justify-content: center;
+            align-items: center;
         }
         .container {
             max-width: 800px;
-            margin: 0 auto;
             background-color: #fff;
             padding: 20px;
             border-radius: 8px;