Update app.py

app.py

@@ -12,7 +12,8 @@ def rot13_cipher(text):
 
 # Gradio interface
 iface = gr.Interface(
-    fn=rot13_cipher, 
+    fn=rot13_cipher,
+    theme="Hev832/Applio",
     inputs="text", 
     outputs=["text", "text"], 
     title="ROT13 Encoder/Decoder",