I would recommend the cMap template if you like the default template. The layout is similar and the Template Customizer can be used on it to change some of the styles to make it more visually similar too.
Connections has, a lot, of classes/ids. I could not even begin to list them all to aid in CSS selectors. The best bet is to use your browser’s dev tool panel and inspect the element you wish to target to get the class name.
Hope this helps!