Even I am in a similar condition, however I have noticed that the CSS styles and rules are all similar for GWT. So learn the basic CSS and how it works and then consult javadocs for CSS rules for widgets. I am working on these lines. Hope this will be helpfull to you too.
This is an excellent resource to start with --> http://code.google.com/edu/submissions/html-css-javascript/ -- You received this message because you are subscribed to the Google Groups "Google Web Toolkit" group. To post to this group, send email to google-web-toolkit@googlegroups.com. To unsubscribe from this group, send email to google-web-toolkit+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/google-web-toolkit?hl=en.