Update app.py

app.py

@@ -164,6 +164,30 @@ button.selected::after{
     background: #E50914;
 }
 
+#popup-overlay {
+    position: fixed;
+    top: 0; left: 0;
+    width: 100vw; height: 100vh;
+    display: flex; justify-content: center; align-items: center;
+    background: rgba(0, 0, 0, 0.5);
+    z-index: 999;
+}
+
+#popup-box {
+    background: white;
+    padding: 20px;
+    border-radius: 10px;
+    box-shadow: 0 0 20px rgba(0,0,0,0.3);
+    width: 340px;
+    text-align: center;
+}
+
+#popup-inner .gr-button {
+    margin-top: 15px;
+    background-color: #5b65a7;
+    color: white;
+}
+
 """