Update app.py

app.py

@@ -26,7 +26,11 @@ st.markdown("""
             text-align: center;
         }
         .stContainer {
-            background-color: rgba(0, 0, 0, 0);
+            background-color: #000000;
+            display: flex;
+            justify-content: center;
+            align-items: center;
+            max-width: 100%;
         }
         .logo-container {
             background-color: black;