Update app.py

app.py

@@ -1,21 +1,27 @@
 import streamlit as st 
 
-# Custom CSS to make the header sticky
+# More specific CSS targeting for sticky header
 st.markdown("""
 <style>
-    .css-18e3th9 {
-        padding-top: 0rem;
-        padding-bottom: 0rem;
-    }
-    header {
+    /* Target the main header container */
+    [data-testid="stHeader"] {
         position: fixed;
-        top: 0;
-        z-index: 999;
-        width: 100%;
+        top: 0px;
+        left: 0px;
+        right: 0px;
+        z-index: 1000;
         background-color: white;
     }
-    .block-container {
-        padding-top: 5rem;
+    
+    /* Add padding to the main content to prevent it from being hidden under the header */
+    [data-testid="stAppViewContainer"] > .main {
+        padding-top: 3rem;
+    }
+    
+    /* Ensure the sidebar isn't affected by the fixed header */
+    [data-testid="stSidebar"] {
+        z-index: 999;
+        padding-top: 3rem;
     }
 </style>
 """, unsafe_allow_html=True)
@@ -24,7 +30,6 @@ st.markdown("""
 
 
 
-
 # --- SHARED ON ALL PAGES ---
 st.logo(image="images/menu_book_60dp_75FBFD.png")
 st.sidebar.title("SBS V2.0 mapper")