Added 1em to the left margin to the paragraph tag [p] which wraps around the text generated for archived posts above menuheader. The font size is also set to 1em. Font weight of [h2] is also changed to normal instead of bold.
PS: first attempt above was wrongly done at the wrong "p" tag as I failed to see the sidebar "p" tag further down the CSS file. Now added padding-left: 1em and font-size: 0.9em (was 0.6em) for the "p" tag for sidebar.