.article-contents {
  border: 1px solid var(--color-border-default);
  border-radius: 0.75rem;
  background-color: var(--color-surface-default);
}

@media (min-width: 900px) {
  .article-contents {
    border: 0;
    border-radius: 0;
    background-color: transparent;
  }
}

.article-contents__summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  min-height: 3rem;
  padding: 0.875rem 1rem;
  border-radius: 0.75rem;
  cursor: pointer;
  list-style: none;
}

.article-contents__summary::-webkit-details-marker {
  display: none;
}

@media (min-width: 900px) {
  .article-contents__summary {
    padding: 0.5rem 0;
    border-radius: 0;
  }
}

.article-contents__summary:hover {
  background-color: var(--color-surface-subtle);
}

.article-contents__summary-text {
  display: grid;
  min-width: 0;
  gap: 0.25rem;
}

.article-contents__label {
  color: var(--color-text-muted);
  font-size: 14px;
  font-weight: 500;
  line-height: 1.4;
}

@media (min-width: 900px) {
  .article-contents__label {
    color: var(--color-text-heading);
    font-size: 16px;
    font-weight: 600;
  }
}

.article-contents__current {
  color: var(--color-text-heading);
  font-size: 16px;
  font-weight: 500;
  line-height: 1.4;
  overflow-wrap: anywhere;
}

@media (min-width: 900px) {
  .article-contents__current {
    display: none;
  }
}

.article-contents__chevron {
  flex-shrink: 0;
  color: var(--color-interactive);
}

.article-contents__disclosure[open] .article-contents__chevron {
  transform: rotate(180deg);
}

@media (prefers-reduced-motion: no-preference) {
  .article-contents__chevron {
    transition: transform 160ms ease;
  }
}

.article-contents__nav {
  padding: 0.25rem 0.75rem 0.75rem;
}

@media (min-width: 900px) {
  .article-contents__nav {
    max-height: max(8rem, calc(100svh - 18rem));
    padding: 0.75rem 0 0.25rem;
    overflow-y: auto;
    overscroll-behavior: contain;
    scrollbar-width: thin;
    scrollbar-color: var(--color-border-default) transparent;
  }
}

.article-contents__list {
  display: grid;
  gap: 0.25rem;
  padding: 0;
  margin: 0;
  list-style: none;
}

.article-contents__link {
  display: block;
  min-height: 3rem;
  padding: 0.75rem;
  border-left: 2px solid var(--color-border-default);
  color: var(--color-text-muted);
  font-size: 16px;
  font-weight: 500;
  line-height: 1.5;
  text-decoration: none;
  overflow-wrap: anywhere;
}

.article-contents__item.is-nested .article-contents__link {
  padding-left: 1.5rem;
}

.article-contents__link:hover {
  background-color: var(--color-surface-subtle);
}

.article-contents__link.is-active {
  border-left-color: var(--color-interactive);
  background-color: var(--color-surface-subtle);
  color: var(--color-interactive);
}

.article-contents__parent {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  min-height: 3rem;
  padding: 0.75rem;
  margin-top: 0.75rem;
  border: 1px solid currentColor;
  border-radius: var(--button-action-radius);
  background-color: transparent;
  color: var(--color-interactive);
  font-size: 16px;
  font-weight: 500;
  text-align: center;
  text-decoration: none;
  overflow-wrap: anywhere;
}

.article-contents__parent:hover {
  background-color: var(--color-surface-interactive);
}

.article-contents__parent svg {
  flex-shrink: 0;
}

.article-contents__summary:focus-visible,
.article-contents__link:focus-visible,
.article-contents__parent:focus-visible {
  outline: 3px solid var(--color-interactive);
  outline-offset: -3px;
}