.modal {
	display: none;
	position: fixed;
	left: 0;
	top: 0;
	width: 100%;
	height: 100%;
	background: rgba(0, 0, 0, .3);
	text-align: center;
	z-index: 999;
}

.modal:after {
	display: inline-block;
	height: 100%;
	width: 0;
	vertical-align: middle;
	content: ''
}