Update app.py

app.py

@@ -124,12 +124,15 @@ examples = [
     "a beautiful woman with black hair and brown eyes",
 ]
 
-css = ".gradio-container {background: url(https://files.123freevectors.com/wp-content/original/121381-abstract-light-grey-texture-background-image.jpg)}"
-app-container {
-max-width: 930px;
-margin-left: auto;
-margin-right: auto;
+
+css = """
+#app-container {
+    max-width: 930px;
+    margin-left: auto;
+    margin-right: auto;
+    ".gradio-container {background: url(https://files.123freevectors.com/wp-content/original/121381-abstract-light-grey-texture-background-image.jpg)}"
 }
+"""
 
 with gr.Blocks(theme=theme, css=css, elem_id="app-container") as app:
     gr.HTML("<center><h6>🎨 FLUX.1-Dev with LoRA 🇬🇧</h6></center>")