datatables.net-fixedcolumns-bs4/css/fixedColumns.bootstrap4.css

FixedColumns for DataTables with styling for [Bootstrap4](https://getbootstrap.com/docs/4.6/getting-started/introduction/)

:root {
  --dtfc_background: white;
  --dtfc-thead-cell_background: var(--dtfc_background);
  --dtfc-tbody-cell_background: var(--dtfc_background);
}

:root.dark {
  --dtfc_background: rgb(33, 37, 41);
}

table.dataTable thead tr > .dtfc-fixed-start,
table.dataTable thead tr > .dtfc-fixed-end,
table.dataTable tfoot tr > .dtfc-fixed-start,
table.dataTable tfoot tr > .dtfc-fixed-end {
  top: 0;
  bottom: 0;
  z-index: 3;
  background-color: var(--dtfc-thead-cell_background);
}
table.dataTable tbody tr > .dtfc-fixed-start,
table.dataTable tbody tr > .dtfc-fixed-end {
  z-index: 1;
  background-color: var(--dtfc-tbody-cell_background);
}
table.dataTable tr > .dtfc-fixed-left::after,
table.dataTable tr > .dtfc-fixed-right::after {
  position: absolute;
  top: 0;
  bottom: 0;
  width: 10px;
  transition: box-shadow 0.3s;
  content: "";
  pointer-events: none;
}
table.dataTable tr > .dtfc-fixed-left::after {
  right: 0;
  transform: translateX(100%);
}
table.dataTable tr > .dtfc-fixed-right::after {
  left: 0;
  transform: translateX(-80%);
}
table.dataTable.dtfc-scrolling-left tr > .dtfc-fixed-left::after {
  box-shadow: inset 10px 0 8px -8px rgba(0, 0, 0, 0.2);
}
table.dataTable.dtfc-scrolling-right tr > .dtfc-fixed-right::after {
  box-shadow: inset -10px 0 8px -8px rgba(0, 0, 0, 0.2);
}
table.dataTable.dtfc-scrolling-right tr > .dtfc-fixed-right + .dtfc-fixed-right::after {
  box-shadow: none;
}

div.dt-scroll,
div.dtfh-floatingparent {
  position: relative;
}
div.dt-scroll div.dtfc-top-blocker,
div.dt-scroll div.dtfc-bottom-blocker,
div.dtfh-floatingparent div.dtfc-top-blocker,
div.dtfh-floatingparent div.dtfc-bottom-blocker {
  position: absolute;
  background-color: var(--dtfc-thead-cell_background);
}

html.dark table.dataTable.dtfc-scrolling-left tbody > tr > .dtfc-fixed-left::after {
  box-shadow: inset 10px 0 8px -8px rgba(0, 0, 0, 0.3);
}
html.dark table.dataTable.dtfc-scrolling-right tbody > tr > .dtfc-fixed-right::after {
  box-shadow: inset -10px 0 8px -8px rgba(0, 0, 0, 0.3);
}
html.dark table.dataTable.dtfc-scrolling-right tbody > tr > .dtfc-fixed-right + .dtfc-fixed-right::after {
  box-shadow: none;
}

div.dtfc-top-blocker,
div.dtfc-top-blocker {
  border-bottom: 0px solid #ddd !important;
}

table.dataTable {
  border-collapse: separate;
}
table.dataTable.table-bordered {
  border-left-width: 0;
  border-right-width: 0;
}
table.dataTable.table-bordered th,
table.dataTable.table-bordered td {
  border-right-width: 0;
  border-top-width: 0;
}
table.dataTable.table-bordered th:last-child,
table.dataTable.table-bordered td:last-child {
  border-right: 1px solid #dee2e6;
}
table.dataTable.table-bordered tr:last-child th,
table.dataTable.table-bordered tr:last-child td {
  border-bottom-width: 0;
}