.c-modal {
	position: fixed;
	top: 0;
	left: 0;
	z-index: 1000;
	width: 100%;
	height: 100%;
	visibility: hidden;
	opacity: 0;
	transition-duration: .5s;
	transition-property: visibility, opacity;

	[data-loaded="false"] & {
		display: none;
	}

	&.is-open {
		visibility: visible;
		opacity: 1;
	}
}