Update app.py

app.py

@@ -320,7 +320,10 @@ def load_predefined_images1():
     return predefined_images1
 
 css = '''
-.gradio-container{max-width: 570px !important}
+#col-container {
+    margin: 0 auto;
+    max-width: 768px;
+}
 h1{text-align:center}
 footer {
     visibility: hidden