consul/ui/packages/consul-ui/app/components/list-collection/skin.scss

%list-collection > ul {
  border-top: 1px solid;
  border-color: rgb(var(--tone-gray-200));
}
%list-collection-partial-button {
  cursor: pointer;
  background-color: rgb(var(--tone-gray-050));
  color: rgb(var(--tone-blue-500));
}
%list-collection-partial-button::after {
  @extend %with-chevron-up-mask, %as-pseudo;
}
%list-collection-partial-button.closed::after {
  @extend %with-chevron-down-mask;
}