Can't get floating social to behave

Can’t style it properly. I have it set to work only on post pages. I want background to be white or transparent. I want it to not go above my menu at the top, and I don’t want it to go over the breadcrumb at the bottom. I’ve spent way too long trying to figure it out on my own. If someone could tell me what to put to make that happen that would be really great.

Thanks in advance