Default CSS Styles

I’m sorry if this has been posted before or somewhere I should be able to find, but I’m wondering if there is a list of default css styles that can be applied to all shortcodes? For instance: when you insert a button, one option is “button_hilite” and when you insert a list, one option is “checked.” Well how do I find other default styles associated with the theme. The example page shows images with rounded corners, is that a default style? Thanks and I hope this makes sense.