Added bg color to payment page

01-frontend/src/pages/Payment.tsx

@@ -184,6 +184,7 @@ export default function Payment() {
     };
 
     return (
+        <div className="page-background">
         <Container maxWidth="md" sx={{ py: 4 }}>
             <Paper elevation={3} sx={{ p: 4 }}>
                 <Typography variant="h4" align="center" gutterBottom>
@@ -223,5 +224,6 @@ export default function Payment() {
                 </Box>
             </Paper>
         </Container>
+        </div>
     );
 }