$transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);

@mixin amd-backdrop {
  background-color: black;
	position: absolute;
	top: 0;
	left: 0;
	bottom: 0;
	right: 0;
	transition: opacity $transition, visibility $transition;
}

@mixin amd-backdrop-hidden {
	opacity: 0;
	visibility: hidden;
}

@mixin amd-backdrop-visible {
	opacity: 0.6;
	cursor: pointer;
	visibility: visible;
}