.rss-app figure {
    margin-bottom: 0;
    height: calc(20vw - 30px);
}
.rss-app figure .img-fluid {
    width: 100%;
    height: 100%;
    object-fit: cover;
}
@media (max-width: 767px) {
.rss-app figure {
    margin-bottom: 0;
    height: calc(40vw - 30px);
}
}
@media (max-width: 575px) {
.rss-app figure {
    margin-bottom: 0;
    height: calc(80vw - 30px);
}
}