Update app.py

app.py

@@ -95,13 +95,17 @@ def main():
     st.markdown(
         """
         <style>
+        body {
+            background-color: #000000;
+            color: #ffffff;
+        }
         .main {
-            background-color: #f0f2f6;
+            background-color: #333333;
             padding: 20px;
             border-radius: 10px;
         }
         .sidebar .sidebar-content {
-            background-color: #2c3e50;
+            background-color: #444444;
             color: white;
         }
         .sidebar .sidebar-content .title {