/* Right-hand collapsible TOC — opt-in via `toc_collapsible: true` page front matter. */

:root {
  --md-toc-chevron-icon: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24'%3E%3Cpath fill='currentColor' d='M8.59 16.59 13.17 12 8.59 7.41 10 6l6 6-6 6z'/%3E%3C/svg%3E");
  --md-toc-expand-duration: 0.24s;
  --md-toc-expand-ease: cubic-bezier(0.4, 0, 0.2, 1);
}

.md-nav--secondary.md-nav--collapsible {
  align-self: flex-start;
}

.md-nav--secondary.md-nav--collapsible > .md-nav__list {
  max-height: none;
  overflow: visible;
}

.md-sidebar--secondary:has(.md-nav--collapsible) .md-sidebar__scrollwrap {
  height: auto;
  max-height: none;
  overflow: visible;
}

.md-sidebar--secondary:has(.md-nav--collapsible) .md-sidebar__inner {
  height: auto;
}

.md-nav--secondary.md-nav--collapsible > .md-nav__list > .md-nav__item {
  margin: 0;
  padding: 0;
}

.md-nav--secondary.md-nav--collapsible .md-nav__item {
  margin: 0;
  padding: 0;
}

.md-nav--secondary.md-nav--collapsible .md-nav__item--nested > .md-toggle {
  position: absolute;
  opacity: 0;
  pointer-events: none;
}

.md-nav--secondary.md-nav--collapsible .md-nav__item--nested {
  position: relative;
  padding: 0;
}

.md-nav--secondary.md-nav--collapsible .md-toc__branch-row {
  display: flex;
  align-items: center;
  margin: 0;
  padding: 0;
  min-height: 0;
}

.md-nav--secondary.md-nav--collapsible .md-toc__branch-link {
  flex: 1;
  min-width: 0;
  margin: 0;
  padding-top: 0.2rem;
  padding-bottom: 0.2rem;
}

.md-nav--secondary.md-nav--collapsible
  > .md-nav__list
  > .md-nav__item:not(.md-nav__item--nested)
  > .md-nav__link {
  margin: 0;
  padding-top: 0.2rem;
  padding-bottom: 0.2rem;
}

.md-nav--secondary.md-nav--collapsible .md-toc__branch-toggle {
  display: inline-flex;
  flex-shrink: 0;
  align-items: center;
  justify-content: center;
  width: 1.2rem;
  height: 1.2rem;
  margin: 0;
  padding: 0;
  cursor: pointer;
  color: var(--md-default-fg-color--light);
}

.md-nav--secondary.md-nav--collapsible .md-toc__branch-toggle .md-nav__icon {
  display: inline-block;
  width: 0.5rem;
  height: 0.5rem;
  background-color: currentcolor;
  mask-image: var(--md-toc-chevron-icon);
  -webkit-mask-image: var(--md-toc-chevron-icon);
  mask-repeat: no-repeat;
  mask-position: center;
  mask-size: contain;
  -webkit-mask-repeat: no-repeat;
  -webkit-mask-position: center;
  -webkit-mask-size: contain;
  transition: transform var(--md-toc-expand-duration) var(--md-toc-expand-ease);
}

.md-nav--secondary.md-nav--collapsible .md-toc__branch-toggle:hover {
  color: var(--md-accent-fg-color);
}

.md-nav--secondary.md-nav--collapsible
  .md-nav__item--nested
  > .md-toggle:checked
  ~ .md-toc__branch-row
  .md-toc__branch-toggle
  .md-nav__icon {
  transform: rotate(90deg);
}

.md-nav--secondary.md-nav--collapsible .md-nav__item--nested > .md-toc__branch-children {
  display: grid;
  grid-template-rows: 0fr;
  margin: 0;
  padding: 0;
  overflow: hidden;
  transition: grid-template-rows var(--md-toc-expand-duration) var(--md-toc-expand-ease);
}

.md-nav--secondary.md-nav--collapsible
  .md-nav__item--nested
  > .md-toggle:checked
  ~ .md-toc__branch-children {
  grid-template-rows: 1fr;
}

.md-nav--secondary.md-nav--collapsible .md-toc__branch-children > .md-nav__list {
  overflow: hidden;
  min-height: 0;
  margin: 0;
  padding: 0;
}

.md-nav--secondary.md-nav--collapsible .md-toc__branch-children .md-nav__link {
  padding-left: 1.2rem;
  padding-top: 0.15rem;
  padding-bottom: 0.15rem;
}

.md-nav--secondary.md-nav--collapsible a.md-nav__link--active,
.md-nav--secondary.md-nav--collapsible a.md-nav__link--active .md-typeset {
  color: var(--md-primary-fg-color);
  font-weight: 700;
}

.md-nav--secondary.md-nav--collapsible .md-toc__branch-link.md-nav__link--active {
  border-left: 2px solid var(--md-primary-fg-color);
  padding-left: calc(0.6rem - 2px);
}

.md-nav--secondary.md-nav--collapsible .md-nav__item--active > .md-nav__link,
.md-nav--secondary.md-nav--collapsible .md-nav__item--active > .md-toc__branch-row .md-nav__link {
  color: var(--md-primary-fg-color);
  font-weight: 700;
}

@media (prefers-reduced-motion: reduce) {
  .md-nav--secondary.md-nav--collapsible .md-nav__item--nested > .md-toc__branch-children,
  .md-nav--secondary.md-nav--collapsible .md-toc__branch-toggle .md-nav__icon {
    transition: none !important;
  }
}