.bd-sidebar-primary .sidebar-primary-item {
  --toc-text: #4a5a73;
  --toc-text-strong: #1f2937;
  --toc-accent: #0d7f91;
}

.bd-sidebar-primary .sidebar-primary-item li.has-children {
  position: relative;
  display: block;
}

.bd-sidebar-primary .sidebar-primary-item ul {
  list-style: none;
  padding-left: 0;
  margin-left: 0;
}

.bd-sidebar-primary .sidebar-primary-item li {
  margin: 0.2rem 0;
}

.bd-sidebar-primary .sidebar-primary-item h3,
.bd-sidebar-primary .sidebar-primary-item h3 a {
  color: var(--toc-text-strong);
  font-weight: 700;
}

.bd-sidebar-primary .sidebar-primary-item li.has-children > .nav-collapse-toggle {
  border: 0;
  background: transparent;
  color: var(--toc-text);
  cursor: pointer;
  margin-right: 0.25rem;
  padding: 0.1rem 0.2rem;
  line-height: 1;
  font-size: 0.85rem;
  vertical-align: middle;
}

.bd-sidebar-primary .sidebar-primary-item li.has-children > .nav-collapse-toggle::before {
  content: "▸";
  display: inline-block;
}

.bd-sidebar-primary .sidebar-primary-item li.has-children > .nav-collapse-toggle[aria-expanded="true"]::before {
  content: "▾";
}

/* Keep text alignment consistent between rows with and without dropdown toggles. */
.bd-sidebar-primary .sidebar-primary-item li:not(.has-children) > a {
  padding-left: 1.35rem;
}

/* Remove underlines in the left table-of-contents links. */
.bd-sidebar-primary .sidebar-primary-item a {
  color: var(--toc-text);
  text-decoration: none !important;
  font-weight: 500;
  line-height: 1.4;
}

.bd-sidebar-primary .sidebar-primary-item a:hover,
.bd-sidebar-primary .sidebar-primary-item a:focus {
  color: var(--toc-text-strong);
  text-decoration: none !important;
}

.bd-sidebar-primary .sidebar-primary-item li.current > a {
  color: var(--toc-accent);
  font-weight: 700;
}

.bd-sidebar-primary .sidebar-primary-item li.current {
  border-left: 4px solid var(--toc-accent);
  padding-left: 0.5rem;
}

/* Keep top header controls (search/theme) right-aligned on desktop. */
@media (min-width: 992px) {
  .bd-header .navbar-header-items {
    display: flex;
    justify-content: flex-end;
  }
}