main {
	max-width: 1280px;
	margin: auto;
}

.intro {
	display: block;
	width:100%;
	position: relative;
	padding: 30px 40px 20px 40px;
}

.icon-books {
	display: block;
	text-align: center;
	font-size: 55px;
	color: #20b7c5;
	margin: 10px 0 10px 0;
}

h1 {
	display: block;
	text-align: center;
	font-size: 36px;
	font-weight: 800;
	margin-bottom: 20px;
}

.linea {
	position: relative;
	display: block;
	width: 100%;
	height: 3px;
	margin: 5px auto;
	background: linear-gradient(to right, rgba(255,255,255,1) 0%, rgba(84,218,234,1) 18%, rgba(55,138,182,1) 35%, rgba(55,138,182,1) 65%, rgba(84,218,234,1) 83%, rgba(255,255,255,1) 100%);
}

h2 {
	display: block;
	font-weight: 600;
	font-size: 24px;
	line-height: 38px;
	text-align: center;
	color: rgba(55,138,182,1);
}

h3 {
	display: block;
	font-size: 20px;
	font-weight: 400;
	color: var(--cn);
	text-align: center;
}

h4 {
	display: block;
	font-size: 18px;
	font-weight: 400;
	color: var(--g);
	text-align: center;
	margin: 10px;
}

.content_index {
	display: grid;
	grid-template-columns: repeat(3, 1fr);
	gap: 30px;
	width: 100%;
	margin: 0 auto 30px auto;
	padding: 0 30px;
}

.content_index .articulo a {
	display: block;
	text-decoration: none;
	color: var(--cn);
	margin-bottom: 10px;
}

.content_index .articulo a:hover div {
	background: #378dba;
}

.content_index h5 {
	display: block;
	width: 100%;
	color: var(--cn);
	font-weight: 400;
	font-size: 16px;
	padding: 5px;
	margin-bottom: 10px;
	border-bottom: solid 1px #4190ba;
}

.content_index .articulo h5 span {
	font-size: 22px;
	color: #20b7c5;
	margin-right: 10px;
}

.content_index .articulo div {
	background: rgba(138, 216, 239, 1);
	padding: 15px;
	min-height: 95px;
}

.content_index .articulo div h6 {
	font-weight: 600;
	font-size: 22px;
}

.content_index .articulo div h6 span {
	float: right;
}

.content_index p {
	font-size: 16px;
}

.content_index .video div {
	background: #80ebf2;
}

/*-========================================== Responsive Design ========================================================*/

@media screen and (max-width: 887px) {
	h1 {
		font-size: 30px;
	}
	
	h2 {
		font-size: 26px;
		line-height: 29px;
		margin-bottom: 10px;
	}

	h3 {
		font-size: 20px;
	}

	h4 {
		font-size: 17px;
	}
	
	.content_index {
		gap: 20px;
	}
}

@media screen and (max-width: 640px) {
	.content_index .articulo div h6 {
		font-size: 18px;
	}
}

@media screen and (max-width: 480px) {
	h1 {
		font-size: 26px;
	}
	
	h2 {
		font-size: 20px;
		line-height: 25px;
	}

	h3 {
		font-size: 17px;
	}

	h4 {
		font-size: 14px;
	}

	.content_index .articulo div h6 {
		font-size: 15px;
	}
}

@media screen and (max-width: 375px) {
	.intro {
		padding: 15px;
	}
	
	.icon-books {
		font-size: 35px;
	}

	h1 {
		font-size: 26px;
		margin-bottom: 15px;
	}

	.content_index {
		display: grid;
		grid-template-columns: repeat(2, 1fr);
		gap: 15px;
	}

	.content_index .articulo div h6 {
		font-size: 16px;
	}
}