Add max-width to not have gallery scroll

app.py

@@ -495,5 +495,8 @@ An Efficient Image Generation Foundation Model with Single-Stream Diffusion Tran
         outputs=[output_gallery, used_seed],
     )
 
+css = '''
+.fillable{max-width: 1230px}
+'''
 if __name__ == "__main__":
-    demo.launch()
+    demo.launch(css=css)