.z-1 - Bring an element closer on the z-index. Sets z-index to 1.
.z-2 - Bring an element closer on the z-index. Sets z-index to 2.
.full-size - No maximum width on a .container. Sets max-width to none.
.full-size-tablet - .full-size on tablet. Sets max-width to none on tablet.
.full-size-mobile - .full-size on mobile. Sets max-width to none on mobile.
.align-center - Centers a .container on .max-xxx the screen. Sets margin left and right to auto.
.div-square - Creates and maintains a 1:1 dimension of a div. CSS magic.
.layer - Add to div to make it expand the entire size of the parent element. Make sure the parent div has 'position: relative'.
.clickable-off - Prevents all click and hover interaction with an element. Sets pointer-events to none.
.clickable-on - Enables all click and hover interaction with an element. Sets pointer-events to auto.
.crop - Prevents overflow of a .container. Sets overflow to hidden.
.sticky-on-page - Required add-on to .page-wrapper when 'position: sticky' is on a page. Sets overflow to visible.