Update app.py

app.py

@@ -560,10 +560,13 @@ agent = smolagents.CodeAgent(
 # UI (copied from w0g2EzpD7fUy, adjusted for app.py)
 # Minimal Gradio chat
 
-theme = gr.themes.SebastianBravo()
-
-with gr.Blocks(title="TechSpark Agent", theme = theme) as demo:
-    gr.HTML(f"<style>{theme.simci_css()}</style>")
+with gr.Blocks(theme=gr.themes.Default(primary_hue="blue")) as demo:
+    gr.HTML("""
+    <style>
+        h2 { text-align: center; color: #1f77b4; }
+    </style>
+    """)
+    
     gr.Markdown("""## 🤖 TechSpark AI Assistant
         Welcome to the TechSpark AI Assistant!  
         Ask anything about **TechSpark staff, tools, courses or location of tools**