#main > div.col.s12:nth-child(1) {
	background: url(../images/hydrogen300.png) no-repeat center center fixed;
	-webkit-background-size: cover;
	-moz-background-size: cover;
	-o-background-size: cover;
	background-size: cover;
}
h1.valign{
    color: #516f60;
}
@media(min-width:993px) and (max-width:1920px) {
	#main > div.col.s12:nth-child(1) {
		background: url(../images/plantilla_head.jpg) no-repeat center center;
		-webkit-background-size: cover;
		-moz-background-size: cover;
		-o-background-size: cover;
		background-size: cover;
	}
    
}
@media(min-width:601px) and (max-width:992px) {
	#main > div.col.s12:nth-child(1) {
		background: url(../images/plantilla_head.jpg) no-repeat center center;
		-webkit-background-size: cover;
		-moz-background-size: cover;
		-o-background-size: cover;
		background-size: cover;
	}
    #main>div.col.s12 h1 {
        font-size: 25px;
    }
     div.section:nth-child(1) h1 {
        font-size: 28px;
    }
}
@media(max-width:600px) {
	#main > div.col.s12 {
		min-height: 200px;
	}
	#main > div.col.s12:nth-child(1) {
		background: url(../images/plantilla_head.jpg) no-repeat center center;
		-webkit-background-size: cover;
		-moz-background-size: cover;
		-o-background-size: cover;
		background-size: cover;
	}
	#content .section:nth-child(1) > article .col.s12:nth-child(1) > div.col.s12 img,
	#content footer.page-footer .container .row img {
		display: block;
		margin: 10px auto;
		width: 200px;
	}
	#main > div.col.s12:nth-child(2) {
		padding-top: 20px;
	}
	#content footer.page-footer div.footer-copyright {
		min-height: 106px;
	}
    #main>div.col.s12 h1 {
        font-size: 25px;
    }
     div.section:nth-child(1) h1 {
        font-size: 28px;
    }
}

.pie{
	font-size: 14px;
}