Update demo.py

demo.py

@@ -43,6 +43,11 @@ css = """
     margin: 0 5px;
     color: black;
 }
+.gradio-container {
+    display: flex;
+    flex-direction: column;
+    align-items: center;
+}
 .row {
     display: flex;
     justify-content: center;