Use bootstrap .btn class for links, buttons
and inputs (used .min-width class for 130px minimal button width).
Use .btn-o class together with the .btn.
Use .btn-lg, .btn-sm, .btn-xs for fast change button sizes.
Add .btn-rounded class for adding the rounded borders.
.btn-block will make your button full-width unit.
:active or .active
:focus or .focus (:hover or .hover)
:disabled or .disabled
Wrap a series of buttons with .btn in .btn-group.
Combine sets of .btn-group into a .btn-toolbar for more complex components.
Use .btn-group-rounded class for adding the rounded borders.
Separate buttons with special class .btn-group-separators to .btn-group
Instead of applying button sizing classes to every button in a group, just add
.btn-group-* to each .btn-group, including when nesting multiple groups.
.btn-group-lg
.btn-group-sm
.btn-group-xs
Make a set of buttons appear vertically stacked rather than horizontally (.btn-group-vertical).
.btn-* classes)