If you are a blogger, you are a digital media professional: a digital content provider, manager and strategist. I am sure you know some SEO, design. And I know you are a marketing pro by now.
Everyday new tools, add-ons, plugins are launched to make complex tasks very easy for the profane users. Very soon we will all be our own webmasters. In the other hand, there are still many functionalities that require to modify your CSS.