Width of content-wrapper container/ entry-post font

Hi!

  1. I am wondering how I can either:

    A. reduce the width of the content-wrapper container, or
    B. increase the padding of the content-wrapper container,

    while only affecting the desktop view (not changing mobile), and only affecting my
    blog post pages.

  2. How can I change the font type/size of the “text preview” for individual posts, on the main blog page? This appears to be called the “class=entry-post”.
    I was wondering if there is already a setting in the theme that I can use to change it, or if code is needed.

Thanks a bunch!