Update app.py

app.py

@@ -149,7 +149,7 @@ with image_blocks as demo:
             radio.change(fn=swap_word_mask, inputs=radio, outputs=word_mask)
             radio.change(None, inputs=[], outputs=image_blocks, _js = """
             () => {
-                css_style = document.querySelector('gradio-app').styleSheets[1]
+                css_style = document.querySelector('gradio-app').shadowRoot.styleSheets[1]
                 last_item = css_style.cssRules[css_style.cssRules.length - 1]
                 last_item.style.display = ["flex", ""].includes(last_item.style.display) ? "none" : "flex";
             }""")