Update app.py

app.py

@@ -283,12 +283,14 @@ def image_processing(image, filter_type):
     
 
 css = """
-#app-container {
+app-container {
     max-width: 1200px;
     margin-left: auto;
     margin-right: auto;
 }
-".gradio-container {background: url(https://upload.wikimedia.org/wikipedia/commons/4/49/Abstract_-_Coconut_Leaf_%28Imagicity_186%29.jpg)}"
+.gradio-container {
+    background: url(https://upload.wikimedia.org/wikipedia/commons/4/49/Abstract_-_Coconut_Leaf_%28Imagicity_186%29.jpg)
+}
 """
 
 # Gradio interface