sidebar fixed

app.py

@@ -30,10 +30,26 @@ st.markdown("""
     height: 100vh;
     overflow: hidden;
     color: white;
-}
+    }
         font-family: 'Amazon Ember', sans-serif;
     }
     
+    [data-testid="stSidebar"] {
+        position: fixed;
+        top: 0;
+        left: 0;
+        height: 100vh;
+        overflow-y: auto;
+        z-index: 100;
+        background-color: #0e1117; /* optional: match your theme */
+        border-right: 1px solid #333; /* optional for separation */
+    }
+
+    /* Adjust the main content so it doesn't go under the fixed sidebar */
+    [data-testid="stAppViewContainer"] > .main {
+        margin-left: 16rem; /* adjust width to match sidebar size */
+    }
+
     .block-container {
         padding-top: 2rem;
     }