Update app.py

app.py

@@ -7,6 +7,31 @@ import plotly.express as px
 from sklearn.feature_extraction.text import TfidfVectorizer
 from sklearn.metrics.pairwise import cosine_similarity
 
+# Custom CSS for white background, styled sidebar, and optional banner
+st.markdown("""
+    <style>
+        .main {
+            background-color: white !important;
+        }
+        .block-container {
+            background-color: white !important;
+        }
+        section[data-testid="stSidebar"] > div:first-child {
+            background-color: #f8f9fa !important;
+            padding: 1rem;
+            border-radius: 0.5rem;
+        }
+        img.banner {
+            width: 100%;
+            border-radius: 12px;
+            margin-bottom: 1rem;
+        }
+    </style>
+""", unsafe_allow_html=True)
+
+# Optional: Add a banner image (replace with your image URL)
+st.markdown('<img src="https://www.loc.gov/static/images/home/home-header.jpg" class="banner">', unsafe_allow_html=True)
+
 # Streamlit app header
 st.title("MetaDiscovery Agent for Library of Congress Collections")
 st.markdown("""