This is for the Title of the page, not heading1, just want to be sure, but either way, when I put in the Custom CSS, the font size didn’t change and I got a red error. Help?
Which title you meant? You mean this title? http://green(-)wood(-)couns(-)elingcenter.com.com/about-tamra-hughes/ screenshot: http://take.ms/firiW If that is not, can you give us a URL that has the title you mentioned or a screenshot so that we can give you the right CSS. I see that you change the title size to 37px and it works just fine, if you meant the title I gave.
For responsiveness, I doubt with the “Fusion core” plugin, please disable that it overrides most of the theme’s code, disable that and then the theme will be responsive.