I’m glad to share with you a good news: “Launching video course about using styles in FireMonkey from one of developers FireMonkey“. It’s single, unique and the fullest video tutorial about styles all over the world. Which covers a lot of questions related with styles and exactly solves a lot of your tasks. I’m a author of this course and one of developer of FireMonkey.
Unfortunately current course is available only in Russian language. But i’m going to localize this course in english, so if you are interested in this course, please, let me know about it, having written the comment below.