/*- create a panel and change its style via .panel-primary.- in bootstrap 4 panels have been replaced by cards- in bootstrap 4 the coloring is done via .bg-primary classes.- the .bg-primary class however styles its object directly and not its header.*/.card.bg-danger {  --sb-header-bg: #f2dede;  --sb-header-fg: #a94442;  background-color: inherit !important;}.card.bg-default {  --sb-header-bg: #f5f5f5;  --sb-header-fg: #333;  background-color: inherit !important;}.card.bg-primary {  --sb-header-bg: #0d6efd;  --sb-header-fg: white;  background-color: inherit !important;}.card-header {  font-size: 14px;}.card .card-header {  background-color: var(--sb-header-bg);  color: var(--sb-header-fg);}.card-header h3 {  font-size: 16px;}/* ###################   popoverStyles   ################### *//*- our popovers have a modal-body that takes care of paddings*/.popover-body {  padding: 0px;}/* ###################   buttonsStyles   ################### *//*- in bootstrap 4/5 the size-classes where changed, so that btn-xs was removed.*/.btn {  font-size: 14px;}.btn-group > .btn-xs {  padding: 1px 5px;  font-size: 12px;  line-height: 1.5;}.btn.btn-xs {  padding: 1px 5px;  font-size: 12px;  line-height: 1.5;  border-radius: 3px;}/* btn-default is missing entirely. Instead there're light and dark, but they're not really the same */.btn.btn-default {  color: #333;  background-color: #fff;  border-color: #ccc;}