Designers, developers, PMs, marketers... If you're making stuff for the web, you'll need HTML/CSS! It's where design meets engineering and is a foundational skill for front-end development that anyone can learn, especially now that there's frameworks to help get started like Bootstrap and HTML5 Boilerplate.
What you'll need:
- a laptop - doesn't matter if it's mac or pc.
- the Chrome browser - we'll be using its inspector tool. http://www.google.com/chrome
- a text editor that you're comfortable with. You can probably just use the built-in Notepad on a PC and Textedit on a Mac, but also feel free to download a free trial of either of these:
- on a PC, get Sublime Text 2 - http://www.sublimetext.com/2
- on a Mac, you can also use Sublime Text 2. Another popular option (that I use) is Textmate - http://macromates.com - the download is in the upper right under the subheader "30 Day Trial".