Update app.py

app.py

@@ -140,6 +140,10 @@ def apply_custom_css():
         div[data-testid="stBottomBlockContainer"] {
             background-color: #111827 !important;
         }
+
+        div[data-testid="stChatInput"]{
+            background-color: #111827 !important;
+        }
         
         .sidebar-section {
             background: rgba(31, 41, 55, 0.4);