Update

app.py

@@ -2,8 +2,14 @@
 
 import gradio as gr
 
-with gr.Blocks() as demo:
-    pass
+css = """
+h1 {
+    text-align: center;
+}
+"""
+
+with gr.Blocks(css=css) as demo:
+    gr.Markdown("# title")
 
 if __name__ == "__main__":
     demo.queue().launch()