.sticky-card {
  position: -webkit-sticky;
  position: sticky;
  top: 100px;
  z-index: 20;
  margin: 10px;
  margin-top: 50px;
  margin-bottom: 50px;
}

.sticky-card:nth-child(2) {
  z-index: 30;
}

.sticky-card:nth-child(3) {
  z-index: 40;
}

.sticky-card:nth-child(4) {
  z-index: 50;
}

@media (min-width: 768px) {
  .sticky-card .row {
    min-height: 400px!important;
  }
}

.sticky-card .row {
  min-height: 300px;
}