Because you’ve added !important to things like background color for the buttons, I can’t override them with my own CSS. For instance, I want the button backgrounds to be transparent; your code is written like this:
a.social-sharing-button.sharer-livejournal {
border: 1px solid #ccc !important;
background: #fff !important;
padding: 6px 7px !important;
}
So I’m stuck with the design decisions you made. This is bad form. How about leaving !important out of your code so your users can make the changes they need to?