Hi - My site is here. It's still under construction.
I'd like to outline the light page/post background with either a border or a box shadow.
I do have a child theme installed, and I do know how to use Firefox to find CSS, but I assume I have to put some php files into my child theme and create some sort of change in those files as well as in the CSS. I don't know which theme coding to change, to make a wrapper or whatever it is I have to do.
Thanks for any help with this.