Update app.py

app.py

@@ -15,11 +15,13 @@ custom_css = """
     background-color: #4CAF50; /* Green */
     color: white;
     width:47%;
+    margin-right: 3%;
 }
 #feedback_btn {
     background-color: #f44336; /* Red */
     color: white;
     width:47%;
+    margin-left: 3%;
 }
 #clear_btn {
     background-color: #2196F3; /* Blue */