I have a twenty twelve theme and I am trying to adjust margin-left unsuccessfully.
The theme has a 40px left and right margin to begin with which I removed because I wanted to add a jpeg background for the footer. The 40px margin didn't allow me that so I thought I will adjust the <div>s separately. Now I've adjusted some, but can't adjust all which leaves me with margin-left:0 for comments and archive names: comments site and blog archive
Generally, the end result has to be more or less like my website.
(Having said that, I don't know who came up with the idea using rem - total pain to modify sizes...)