/* Native anchor links and a normal two-column sticky layout. */
html { scroll-behavior: smooth; }

body.has-article-toc:not(.bw-menu-open) {
  /* Clip does not create a scroll container around the sticky sidebar. */
  overflow-x: clip;
  overflow-y: visible;
}

.article-layout,
.article-sidebar,
.article-content { min-width: 0; }

.article-sidebar { padding: 2rem var(--article-gutter) 0; }

.article-toc {
  position: static;
  padding: 0;
  border-block: 1px solid var(--article-rule);
  color: #27454a;
}

.article-toc__title {
  margin: 0;
  padding: 1rem 0;
  font-size: 0.8rem;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.article-toc__toggle {
  display: none;
  width: 100%;
  min-height: 56px;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 1rem 0;
  border: 0;
  background: transparent;
  color: inherit;
  font: inherit;
  font-size: 1rem;
  text-align: left;
  cursor: pointer;
}

.article-toc__toggle::after {
  width: 0.5rem;
  height: 0.5rem;
  flex-shrink: 0;
  margin-right: 0.2rem;
  border-right: 1.5px solid currentColor;
  border-bottom: 1.5px solid currentColor;
  content: "";
  transform: rotate(45deg);
  transition: transform 300ms ease-in-out;
}

.article-toc__toggle[aria-expanded="true"]::after { transform: rotate(225deg); }
.article-toc.is-collapsible .article-toc__title { display: none; }
.article-toc.is-collapsible .article-toc__toggle { display: flex; }

.article-toc__panel {
  display: grid;
  grid-template-rows: 1fr;
  opacity: 1;
  visibility: visible;
  transition: grid-template-rows 300ms ease-in-out, opacity 300ms ease-in-out,
    visibility 0s;
}

.article-toc.is-collapsible:not(.is-open) .article-toc__panel {
  grid-template-rows: 0fr;
  opacity: 0;
  visibility: hidden;
  transition: grid-template-rows 300ms ease-in-out, opacity 300ms ease-in-out,
    visibility 0s 300ms;
}

.article-toc__panel-inner { min-height: 0; overflow: hidden; }

.article-toc__list {
  margin: 0;
  padding: 0 0 1rem;
  list-style: none;
}

.article-toc__list li { margin: 0; padding: 0; list-style: none; }

.article-toc__link {
  display: block;
  padding: 0.7rem 0.9rem;
  border-left: 2px solid rgba(52, 101, 109, 0.15);
  color: #505b59;
  font-family: "Roboto", Arial, sans-serif;
  font-size: 0.94rem;
  font-weight: 300;
  line-height: 1.45;
  text-decoration: none;
  overflow-wrap: anywhere;
  transition: background-color 180ms ease, color 180ms ease;
}

.article-toc__link:hover {
  border-left-color: #34656d;
  background: rgba(52, 101, 109, 0.08);
  color: #27454a;
}

.article-toc__link:focus-visible,
.article-toc__toggle:focus-visible {
  outline: 2px solid #34656d;
  outline-offset: -2px;
}

.article-content h2[id] { scroll-margin-top: 8rem; }

.article-inline-image {
  max-width: var(--article-copy-width);
  margin: 2rem 0 0;
}

.article-inline-image img {
  display: block;
  width: 100%;
  height: auto;
  border-radius: 4px;
}

.article-inline-image figcaption {
  margin-top: 0.75rem;
  color: #5b6865;
  font-size: 0.9rem;
  line-height: 1.5;
}

@media (min-width: 1200px) {
  .article-layout {
    display: grid;
    grid-template-columns: 14rem minmax(0, 1fr);
    gap: clamp(2rem, 4vw, 4rem);
    max-width: 100rem;
    margin-inline: auto;
    padding: var(--article-section-space) var(--article-gutter);
  }

  .article-sidebar { padding: 0; }

  .article-toc {
    position: sticky;
    top: 9rem;
    max-height: calc(100dvh - 11rem);
    overflow-y: auto;
    overscroll-behavior: contain;
    scrollbar-width: thin;
    scrollbar-color: #8bb3b0 transparent;
    border: 0;
  }

  .article-toc__title,
  .article-toc.is-collapsible .article-toc__title {
    display: block;
    padding: 0 0 1rem;
  }

  .article-toc.is-collapsible .article-toc__toggle { display: none; }

  .article-toc .article-toc__panel {
    display: block;
    opacity: 1;
    visibility: visible;
    transition: none;
  }

  .article-toc__link { padding: 0.65rem 0.85rem; font-size: 0.875rem; }

  .article-content {
    --article-gutter: 0rem;
    --article-copy-width: 56rem;
  }

  .article-content > article > :first-child,
  .article-content > section:first-child { padding-top: 0; }

  .article-content .bg-section { padding-inline: 1.5rem; }
  .article-content h2[id] { scroll-margin-top: 10rem; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .article-toc__panel,
  .article-toc.is-collapsible:not(.is-open) .article-toc__panel,
  .article-toc__toggle::after,
  .article-toc__link { transition: none; }
}