Magento: Provide Responsive Transaction E-Mail Template for Invoices/Order Confirmation

just an other small project. for a magento store we need the standard magento transaction mails (we use magento 1.9.1) but they should be done without the typically table tags, but with css tables only and should be compatible for mobile and desktop version. you will receive an image (invoice template how it should looks like) on desktop but you will need to provide a smart solution how it may looks like on mobile.