/* Keep the breadcrumb trail on one line inside the book theme's fixed-height article header. */
.bd-header-article .header-article-items__start {
  display: flex;
  align-items: center;
  flex: 1 1 auto;
  min-width: 0;
  overflow: hidden;
}

.bd-header-article .header-article-item:has(ul.bd-breadcrumbs) {
  flex: 1 1 auto;
  min-width: 0;
}

.bd-header-article nav[aria-label="Breadcrumb"] {
  min-width: 0;
  overflow: hidden;
}

ul.bd-breadcrumbs {
  flex-wrap: nowrap;
  min-width: 0;
  margin: 0;
}

ul.bd-breadcrumbs li.breadcrumb-item {
  min-width: 0;
}

ul.bd-breadcrumbs li.breadcrumb-home {
  flex: 0 0 auto;
}

/* Narrow screens: only the home icon and the parent page fit beside the header buttons. */
@media (max-width: 991.98px) {
  ul.bd-breadcrumbs
    li.breadcrumb-item:not(.breadcrumb-home):not(:nth-last-child(2)) {
    display: none;
  }
}