Update app.py

app.py

@@ -613,32 +613,30 @@ st.markdown("""
 <div style='
     display: flex; 
     align-items: center; 
-    justify-content: space-between; 
-    padding: 0.5rem 1rem; 
-    border-bottom: 1px solid #e5e7eb;
+    justify-content: center; 
+    padding: 0.5rem 0; 
+    gap: 15px;
+    border-bottom: 1px solid 
+#e5e7eb;
     margin-bottom: 1rem;
-    width: 100%;
 '>
-    <img src='https://sustainability-lab.github.io/images/logo_dark.svg' 
-         style='height: 50px; flex-shrink: 0;' />
-    
+    <img src='https://sustainability-lab.github.io/images/logo_light.svg' 
+         style='height: 100px;' />
     <h1 style='
         margin: 0; 
-        font-size: 2rem; 
+        font-size: 1.8rem; 
         font-weight: 700; 
-        color: #1f2937;
-        text-align: center;
-        flex-grow: 1;
+        color: 
+#1f2937;
+        line-height: 70px;
     '>VayuChat</h1>
-    
     <span style='
-        font-size: 1rem; 
-        color: #6b7280;
+        font-size: 0.9rem; 
+        color: 
+#6b7280;
+        line-height: 40px;
         font-weight: 500;
-        text-align: right;
-        flex-shrink: 0;
-        white-space: nowrap;
-    '>AI Air Quality Analysis<br/>Sustainability Lab, IIT Gandhinagar</span>
+    '>AI Air Quality Analysis • Sustainability Lab, IIT Gandhinagar</span>
 </div>
 """, unsafe_allow_html=True)