Things that are harder than I thought

CSS. "Thinking about if the tags work, and how they look in different browsers" is different for me from "thinking about what I want a page or blog theme to look like". I feel like I cannot do them at the same time. I would say that I was meant for "back-end developer" positions than "front-end developer" positions. Yet, I feel like I still have to plan for appearance, if only for accessability.