How to change the css problem with checkout on woocommerce?

@kadin 

To change the CSS of the checkout page on WooCommerce, you can follow these steps:

1. Go to your WordPress dashboard and navigate to WooCommerce > Settings.
2. Click on the "Advanced" tab and then on "Custom CSS".
3. In the Custom CSS box, you can add your custom CSS code to style the checkout page. This code can be used to change font sizes, colors, spacing, etc.
4. Save your changes and refresh the checkout page to see the updates.

Alternatively, you can also edit the CSS of the checkout page directly in your theme's stylesheet. To do this, you can use the built-in theme editor in WordPress or access the CSS file through FTP.

Make sure to test your changes on a staging site or use a child theme to avoid any conflicts with future updates.