States
.hover, .active, .focus and .disabled show a state without touching the element.
Use them for demos, style guides and design reviews. They work on buttons,
links, inputs, selects, textareas and select buttons, and look the same as the real
state. Form fields have no hover look, so .hover leaves them alone.
Buttons
Links
Form controls
Real states
.disabled only changes the look and blocks the pointer. For a
control that is really off, use the disabled attribute, or
aria-disabled="true" on a link. The current page or item takes
aria-current, which shows the hover look. See
ARIA attributes.
Variables
Disabled elements fade to --i-control-disabled-opacity, listed with
the other control variables.