admin/src/scss/3-components/_card.scss

.card {
  margin-bottom: $grid-gutter-width;
  box-shadow: $card-shadow;
}

.card-header {
  border-bottom-width: 1px;
}

.card-title {
  font-size: $card-title-font-size;
  font-weight: $card-title-font-weight;
  color: $card-title-color;
}

.card-subtitle {
  font-weight: $font-weight-normal;
}

.card-table {
  margin-bottom: 0;
}

.card-table tr td:first-child,
.card-table tr th:first-child {
  padding-left: $card-spacer-x;
}

.card-table tr td:last-child,
.card-table tr th:last-child {
  padding-right: $card-spacer-x;
}

.card-img,
.card-img-top,
.card-img-bottom {
  @include img-fluid;

  @media all and (-ms-high-contrast:none) {
    height: 100%;
  }
}