So a customer registers and creates an account. They order something (at least, they should ;-))
After that they can visit their My Account > My Orders and select to print an order, shipment or whatever is in there.
When this action is performed on screen you are presented with the e.g. invoice (and a print dialog)
i added styling for this page to custom.css but it is not used.
Where would i need to do this or do i need to add something in a certain file?