2 Columns, Left-Aligned, Liquid Layout

Change Wrapper width to a percentage

Let's start by changing that fixed wrapper width to a percentage. I'll start with 90%:

Your web page should function like this now. If you resize the browser width, you'll notice the design "breaks" when the window gets too narrow. There may be a time and place for that functionality in the future, but it's not what we're after right now. Check it out: