IMPORTANT!
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These files are provided so that you can test your skin with CSS and image files that make up the system defaults that are used with every payment form.

YOU MUST NOT CHANGE ANY OF THE CSS RULES OR IMAGES IN THIS DIRECTORY

If you want to "override" any of the system rules (e.g. removing the background image from the rule "ContentHeader"), then you must re-define the required rules in your OWN CSS files - because CSS cascades its rule definitions, you don't have to completely re-define the whole rule - just the components that you want to override. The payment form is designed so that it will include the system CSS files BEFORE the merchant custom CSS files.