I am trying to implement a tree diagram like the one in this tutorial. I pasted the CSS code from the tutorial at the bottom of my theme's style.css file. It works in that it makes a tree. The problem is that the alignment is off; on my site it looks like this screenshot. Here's the boggling part: When I paste the entire text of the modified style.css and the HTML document into files on my own computer (linking the two files of course), the tree shows up correctly, exactly as in the tutorial. I assume that some stray CSS code is coming from somewhere and causing the alignment error, but I don't know from where.
My theme is Aggregate. In addition to style.css it has four other tiny CSS files, but they do nothing except change the colors of things, and in the theme settings, they are inactive.