.modal{
	
	width: 100%;
	height: 100vh;
	background: rgba(0,0,0,0.8);
	position: absolute;
	top: 0;
	left: 0px;
	display: flex;
	animation: modal 8s 1s;
	visibility: hidden;
	opacity: 0;
}

.contenido {
	margin:auto;
	width: 50%;
	height: 50%;
	background: white;
	border-radius: 10px;
}

#cerrar {
	display: none;
	
}

#cerrar + label {
	text-align:center;
	position: fixed;
	color: #fff;
	font-size: 12px;
	z-index: 50;
	background: darkred;
	height: 40px;
	width: 40px;
	line-height: 40px;
	border-radius: 10%;
	right: 10px;
	top: 5px;
	cursor: pointer;
	animation: modal 2s 3s forwards;
	visibility: hidden;
	opacity: 0;
}

#cerrar:checked + label, #cerrar:checked ~ .modal{
	display: none;
}

@keyframes modal {
	100% {
		visibility: visible;
		opacity: 1;
	}
}