Wells
Default well
Use the well as a simple effect on an element to give it an inset effect.
Look, I'm in a well!
<div class="well">...</div>
Optional classes
Control padding and rounded corners with two optional modifier classes.
Look, I'm in a large well!
<div class="well well-lg">...</div>
Look, I'm in a small well!
<div class="well well-sm">...</div>