Content blocks are the building blocks of pages in SproutCMS. A number of these ship with SproutCMS and will need styling inside the skin CSS.
Each content block is wrapped inside a <div> with the class widget when output on the front-end.
For a full example of styling these content blocks, see global.css in the default skin provided with SproutCMS.
Modifier classes are added to the wrapping <div> using a capitalised camel-case class unique to the content block type. These class names are preceded by "widget-". For example, the Map Directions content block wrapping <div> would look like this: