Really hone your HTML skills, so that you can smoothly incorporate script in your pages. CSS is also very well married to JS, which is where all the cool dynamic behaviors come from. BUT, CSS can do a lot more than people may realize. Simple visual effects and animation can be done exclusively with CSS (though can be easily emulated with script). I always suggest to people that they write pages the work without script. There is so much we can now do with CSS so when you get to that study, explore down every road. CSS Tricks is a great site for seeing how far CSS has come these past few years. QuirksMode is a good site for picking up on the history of browser API’s and the quirks in various iterations. Keep MDN close at hand for anything to do with browsers. Follow the links from their pages to W3C and take a few minutes every day to familiarize yourself with both sites.