I have used css to remove the tertiary sidebar (on the right) within the Oxygen theme, and found the code on this forum to make my PAGES stretch to fit the rest of the white space (example). However, I can't figure out how to make my POSTS span from the secondary sidebar on the left all the way to the right (example).
My site is challengeforbetter.wordpress.com
Thanks for any help!
The blog I need help with is challengeforbetter.com.