Add custom background color #fffdfa to entire website

- Set background color for main Streamlit app container
- Apply background to main content block as well
- Creates warm, off-white background throughout the interface
- Maintains readability while adding subtle visual warmth

app/streamlit_app.py

@@ -592,6 +592,16 @@ def main():
     # Custom CSS for Par-ity branding
     st.markdown("""
     <style>
+    /* Set background color for entire app */
+    .stApp {
+        background-color: #fffdfa;
+    }
+    
+    /* Ensure main content area also has the background */
+    .main .block-container {
+        background-color: #fffdfa;
+    }
+    
     /* Par-ity Project Styling */
     .main-header {
         text-align: center;