You now know a lot more about CSS and HTML than you did when you walked in. For many of you, it was difficult to first wrap your head around how this new language works. On the other hand, once you understood, it proved to be not nearly so difficult as you first had imagined. Now that you have gained more confidence, you are able to liberate your design sense and impose it upon the code, to make the code work for you.
Be good, enjoy what you do and have an effective web presence.
All the best,
onno