Where is the correct place to add CSS code to put a thin black border around the images that this widget delivers? A thin black border around images matches my site's style, and I have tried styling everything that I can think of, both via my stylesheet and directly editing the plugin, and I am unable to style the image with a border.
I figure that there has to be a place to put it, but I just don't know where it is yet. Can someone help me find it? Thanks!