How to modify System workflow message with a modern look Header?

Question

I would like to add some fancy CSS and HTML in the system workflow messages. I know there’s a section to add a header logo. But I was wondering if there’s an ideal way to make the entire format responsive like modern emails. I have tried copying and pasting some CSS HTML from mail chimp although it works but In th drupal log there’s 100s error (User error: smarty......) gets registered per email is sent.

If someone has done already something like this I would be very grateful if you share your sample code please. Or even some suggestions would be greatly appreciated.

Answer 1

Put your css inside {literal}{/literal} tags to prevent smarty from processing them.