.jsd {
  position: absolute;
  height: 100%;
  width: 100%;
  overflow-x: hidden;
  overflow-y: scroll;
  border: 1px solid yellow;
}

.jsd-card {
  position: absolute;
  width: 100%;
}

.jsd-card.jsd-card--fixed {
  position: fixed;
  top: 0;
  left: 0;
}

.jsd-card.jsd-card--ghost {
  display: none;
  height: 1px;
}