I am using the Oxygen WordPress theme for a portfolio website, but I can't figure out how to make the posts appear on the left. They are always centered. Also, how can I change the width of a post? They are always centered and about 470px wide. I opened the editor and tried changing a few values in the CSS file, but no changes occur. Am I looking at a wrong place? What should I change, say, if I just want the posts to appear aligned on the left and with a width of 600px? The same goes when I click on a post category - it lists all posts in that category in center with 470px width.
By the way, I should add that I am perhaps only an advanced beginner here. Any help is greatly appreciated. Thank you!