html, body {
    height: 100%;
    display: flex;
    flex-direction: column;
}

.container-fluid {
    flex: 1;
}

.card {
    margin-bottom: 20px;
    box-shadow: 0 2px 4px 0 rgba(0, 0, 0, 0.1), 0 3px 10px 0 rgba(0, 0, 0, 0.095);
}

.card:hover {
    background-color: rgba(0,0,0,0.1);
    transition: 0.1s;
}

.card:not(:hover) {
    transition: 0.2s;
}

.card img {
    height: 20vw;
    object-fit: cover;
}

.jumbotron {
    box-shadow: 0 0 0 2px grey;
}

/* from Youtubes */
.videoWrapper {
	position: relative;
	padding-bottom: 56.25%; /* 16:9 */
	padding-top: 25px;
	height: 0;
}
.videoWrapper iframe {
	position: absolute;
	top: 0;
	left: 0;
	width: 100%;
	height: 100%;
}