Update app.py

app.py

@@ -145,13 +145,15 @@ css = """
 }
 
 .footer {
-    margin-top: 40px;
-    padding: 16px 0;
-    text-align: center;
-    font-size: 13px;
-    color: #94a3b8;
-    border-top: 1px solid rgba(148,163,184,0.2);
-}
+        position: fixed;
+        bottom: 0;
+        width: 100%;
+        text-align: center;
+        padding: 10px;
+        font-size: 12px;
+        background: #f9f9f9;
+        border-top: 1px solid #ddd;
+    }
 
 """