.img-inicio h4 {
    margin: 0;
    color: black;
    text-align: center;
}
.img-inicio {
    width: 46%;
    margin: 5px;
    float: left;
}
.img-inicio img {
    width: 100%;
    height: 230px;
    border: 1px inset;
}
section h3 {
    background: linear-gradient(black, #9df99d, yellow, #e11212);
    -webkit-background-clip: text;
    color: transparent;
    text-align: center;
    border-top: 1px inset;
    text-shadow: 2px 1px 0px #307530;
}
.ytp-cued-thumbnail-overlay-image {
    width: 100%;
    height: 230px;
}

@media screen and (max-width:600px) {
section h3 {
	display:none;
	}
	iframe {
    width: 94%;
}
	body {
		background:none;
	}
	.img-inicio img {
    height: 100%;
}
	
}