body {
	text-align: center;
	font-family: sans-serif;
	margin: 10 10 10 0;
	padding: 10 10 10 10;
}

.modal {
	width: 100%;
	height: 100vh;
	background: rgba(0,0,0,0.8);
	
	
	position: absolute;
	top: 0;
	left: 0;
	
	display: flex;

	
	animation: modal 1s 2s forwards;
	visibility: hidden;
	opacity: 0;
}

.contenido {
	display: flex;
	overflow: hidden;
	flex-direction: column;
	align-items: center;
	margin: auto;
	width: auto;
	max-width: 65%;
	height: auto;
	background: white;
	border-radius: 10px;
	border: 15px solid white;
}

#cerrar {
	display: none; 
}

#cerrar + label {
	position: fixed;
	color: #fff;
	font-size: 25px;
	z-index: 50;
	background: darkred;
	height: 50px;
	width: 50px;
	line-height: 40px;
	border-radius: 10%;
	right: 300px;
	top: 300px;
	cursor: pointer;
	
	animation: modal 2s 3s forwards;
	visibility: visibility;
	opacity: 0;
}

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

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