Adjust tab styling border to enhance visual design

Refined the selected tab styling by modifying the border width from 1px to 5px, maintaining the golden color scheme while creating a more pronounced visual highlight.

app.py

@@ -48,8 +48,7 @@ st.markdown("""
 
     .stTabs [aria-selected="true"] {
         background-color: #DAA520;
-        border-radius: 10px;
-        border: 1px solid #FFD700;
+        border: 5px solid #FFD700;
         color: white;
     }