BUTTON CLASSES
The .btn class is used to define an anchor tag as a button. All the anchor tags that has to be rendered as a button needs to have .btn class.
BUTTONS
Primary buttons can be used as Call To Action buttons. Thier roles are defined by what they represent. For ex. primary button will have a class name primary prefixed with .is so that would be .is-primary. Same goes for the other buttons.
GHOST
Ghost buttons simply have class like .is-ghost followed by the role they represent. So a ghost class would be .is-ghost-primary.
UPPERCASE
GHOST UPPERCASE
LARGE BUTTONS
To make a button large just add the class .is-large
BUTTON GROUP
Grouping of buttons can be done by using .is-group class.
INLINE ICONS
Icons can aligned either left or right by using .left-inline-icon & .right-inline-icon classes respectively.