Helpers

You can apply responsive helper classes to almost any element, in order to alter its style based upon the browser's width.

Float	`is-clearfix`	Fixes an element's floating children
	`is-pulled-left`	Moves an element to the left
	`is-pulled-right`	Moves an element to the right
Spacing	`is-marginless`	Removes any margin
Spacing	`is-paddingless`	Removes any padding
Other	`is-overlay`	Completely covers the first positioned parent
	`is-clipped`	Adds overflow hidden
	`is-radiusless`	Removes any radius
	`is-shadowless`	Removes any shadow
	`is-unselectable`	Prevents the text from being selectable
	`is-invisible`	Adds visibility hidden