Update app.py

app.py

@@ -6,12 +6,44 @@ import math
 # Set page config at the very beginning
 st.set_page_config(page_title='Total Corneal Astigmatism Prediction', page_icon=':eyeglasses:', layout='wide')
 
-# Custom CSS to set background color to #000
+# Custom CSS to set background color to #000 for main app and navigation
 st.markdown("""
 <style>
     .stApp {
         background-color: #000;
     }
+    
+    .stDeployButton {
+        display: none !important;
+    }
+
+    header[data-testid="stHeader"] {
+        background-color: #000;
+    }
+
+    .stDecoration {
+        background-color: #000 !important;
+    }
+    
+    .stToolbar {
+        background-color: #000 !important;
+    }
+
+    #MainMenu {
+        background-color: #000 !important;
+    }
+
+    div[data-testid="stToolbar"] {
+        background-color: #000 !important;
+    }
+
+    button[kind="headerNoPadding"], button[data-testid="baseButton-headerNoPadding"], button[aria-haspopup="menu"] {
+        background-color: transparent !important;
+    }
+
+    .stApp > header {
+        background-color: transparent !important;
+    }
 </style>
 """, unsafe_allow_html=True)