portainer/app/react/components/datatables/NestedTable.css

.inner-datatable .widget {
  border: 0 !important;
}

.inner-datatable {
  @apply rounded-md border border-solid border-gray-5 th-dark:border-gray-9;
  overflow: hidden;
}

.inner-datatable table thead {
  border-top: none !important;
}

.inner-datatable tr > th:first-child,
.inner-datatable tr > td:first-child {
  padding-left: 20px;
}

.inner-datatable tr > th:last-child,
.inner-datatable tr > td:last-child {
  padding-right: 20px;
}