.help-shell {
  padding-top: var(--space-xl);
}

.breadcrumbs {
  display: flex;
  min-width: 0;
  align-items: center;
  gap: var(--space-xs);
  margin-bottom: var(--space-xl);
  overflow: hidden;
  color: var(--color-text-tertiary);
  font-size: 0.82rem;
  white-space: nowrap;
}

.breadcrumbs a {
  color: var(--color-text-secondary);
  text-decoration: none;
}

.breadcrumbs a:hover {
  color: var(--color-text-primary);
}

.breadcrumbs span:last-child {
  overflow: hidden;
  text-overflow: ellipsis;
}

.help-layout {
  display: grid;
  grid-template-columns: 15rem minmax(0, 1fr);
  align-items: start;
  gap: clamp(2rem, 5vw, 4.5rem);
}

.help-sidebar {
  position: sticky;
  top: 6.5rem;
  padding-bottom: var(--space-xxl);
}

.sidebar-title {
  margin-bottom: var(--space-s);
  color: var(--color-text-tertiary);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.help-sidebar ul,
.help-topic-menu ul {
  display: grid;
  margin: 0;
  padding: 0;
  gap: var(--space-xxs);
  list-style: none;
}

.help-sidebar a,
.help-topic-menu a {
  display: flex;
  min-height: var(--size-control);
  align-items: center;
  padding: 0.55rem 0.75rem;
  border-radius: var(--radius-control);
  color: var(--color-text-secondary);
  font-size: 0.9rem;
  line-height: 1.3;
  text-decoration: none;
}

.help-sidebar a:hover,
.help-topic-menu a:hover {
  background: var(--color-surface-muted);
  color: var(--color-text-primary);
}

.help-sidebar li.active a,
.help-topic-menu li.active a {
  background: var(--color-accent-soft);
  color: var(--color-text-primary);
  font-weight: 650;
}

.help-topic-menu {
  display: none;
  margin-bottom: var(--space-l);
}

.help-topic-menu > summary {
  display: flex;
  min-height: var(--size-control);
  align-items: center;
  justify-content: space-between;
  padding: 0.65rem 0.85rem;
  border: 1px solid var(--color-separator);
  border-radius: var(--radius-control);
  background: var(--color-surface-raised);
  color: var(--color-text-primary);
  cursor: pointer;
  font-weight: 650;
  list-style: none;
}

.help-topic-menu > summary::-webkit-details-marker {
  display: none;
}

.help-topic-menu > summary::after {
  width: 0.5rem;
  height: 0.5rem;
  border-right: 0.1rem solid currentColor;
  border-bottom: 0.1rem solid currentColor;
  content: "";
  transform: translateY(-0.15rem) rotate(45deg);
}

.help-topic-menu[open] > summary::after {
  transform: translateY(0.15rem) rotate(225deg);
}

.help-topic-menu nav {
  margin-top: var(--space-xs);
  padding: var(--space-xs);
  border: 1px solid var(--color-separator);
  border-radius: var(--radius-row);
  background: var(--color-surface-raised);
}

.help-content-card {
  min-width: 0;
  overflow: hidden;
  border: 1px solid var(--color-separator);
  border-radius: var(--radius-container);
  background: var(--color-surface-raised);
  box-shadow: 0 1rem 3rem var(--color-shadow);
}

.help-article {
  max-width: 52rem;
  padding: clamp(1.5rem, 5vw, 4.5rem);
}

.help-article h1 {
  max-width: 18ch;
  margin-bottom: var(--space-s);
  font-size: clamp(2.25rem, 5vw, 3.6rem);
  line-height: 1.05;
}

.help-article .tagline {
  margin-bottom: var(--space-l);
  color: var(--color-text-tertiary);
  font-size: 1rem;
  font-weight: 600;
}

.help-article .lead {
  margin-bottom: var(--space-xl);
  color: var(--color-text-primary);
  font-size: clamp(1.05rem, 2vw, 1.2rem);
}

.help-article h2 {
  margin-top: var(--space-xxl);
  padding-top: var(--space-l);
  border-top: 1px solid var(--color-separator);
  font-size: clamp(1.5rem, 3vw, 2rem);
}

.help-article h3 {
  margin-top: var(--space-xl);
}

.help-article p,
.help-article li,
.help-article dd {
  color: var(--color-text-secondary);
}

.help-article p {
  margin-bottom: var(--space-m);
}

.help-article ul,
.help-article ol {
  margin: 0 0 var(--space-l);
  padding-left: 1.35rem;
}

.help-article li {
  margin-bottom: var(--space-xs);
  padding-left: var(--space-xxs);
}

.help-article a {
  text-underline-offset: 0.16em;
}

.help-article strong {
  color: var(--color-text-primary);
}

.help-article .toc {
  display: grid;
  padding: 0;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--space-s);
  list-style: none;
}

.help-article .toc li {
  min-width: 0;
  margin: 0;
  padding: var(--space-m);
  border: 1px solid var(--color-separator);
  border-radius: var(--radius-control);
  background: color-mix(in srgb, var(--color-surface-muted) 52%, transparent);
}

.help-article .toc a {
  display: block;
  margin-bottom: var(--space-xxs);
  color: var(--color-text-primary);
  font-weight: 650;
}

.help-article table {
  display: block;
  width: 100%;
  max-width: 100%;
  margin: var(--space-l) 0;
  overflow-x: auto;
  border: 1px solid var(--color-separator);
  border-radius: var(--radius-control);
  border-collapse: separate;
  border-spacing: 0;
  font-size: 0.9rem;
}

.help-article tbody,
.help-article thead {
  display: table;
  width: 100%;
  min-width: 34rem;
  table-layout: fixed;
}

.help-article th,
.help-article td {
  padding: 0.75rem 0.9rem;
  border-bottom: 1px solid var(--color-separator);
  color: var(--color-text-secondary);
  text-align: left;
  vertical-align: top;
}

.help-article th {
  background: var(--color-surface-muted);
  color: var(--color-text-primary);
  font-weight: 650;
}

.help-article tr:last-child td {
  border-bottom: 0;
}

.help-article kbd {
  display: inline-block;
  min-width: 1.6rem;
  padding: 0.12rem 0.35rem;
  border: 1px solid var(--color-separator-strong);
  border-bottom-width: 0.16rem;
  border-radius: 0.35rem;
  background: var(--color-surface-muted);
  color: var(--color-text-primary);
  font-family: var(--font-mono);
  font-size: 0.82em;
  line-height: 1.25;
  text-align: center;
}

.help-article dl.fields {
  margin: var(--space-l) 0;
  padding: var(--space-l);
  border: 1px solid var(--color-separator);
  border-radius: var(--radius-row);
  background: color-mix(in srgb, var(--color-surface-muted) 52%, transparent);
}

.help-article dl.fields > dt {
  margin-top: var(--space-m);
  color: var(--color-text-primary);
  font-weight: 650;
}

.help-article dl.fields > dt:first-child {
  margin-top: 0;
}

.help-article dl.fields > dd {
  margin: var(--space-xxs) 0 0;
}

.term-detail {
  display: block;
  margin-top: var(--space-xxs);
  color: var(--color-text-tertiary);
  font-size: 0.88rem;
}

.article-navigation {
  display: grid;
  padding: var(--space-l);
  border-top: 1px solid var(--color-separator);
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--space-s);
}

.article-link {
  display: flex;
  min-height: 5rem;
  flex-direction: column;
  justify-content: center;
  padding: var(--space-s) var(--space-m);
  border: 1px solid var(--color-separator);
  border-radius: var(--radius-control);
  color: var(--color-text-primary);
  text-decoration: none;
}

.article-link:hover {
  background: var(--color-surface-muted);
}

.article-link span {
  color: var(--color-text-tertiary);
  font-size: 0.75rem;
  font-weight: 650;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.article-link strong {
  margin-top: var(--space-xxs);
  font-size: 0.9rem;
}

.article-link-next {
  grid-column: 2;
  text-align: right;
}

@media (max-width: 56rem) {
  .help-layout {
    grid-template-columns: 1fr;
  }

  .help-sidebar {
    display: none;
  }

  .help-topic-menu {
    display: block;
  }
}

@media (max-width: 44rem) {
  .breadcrumbs {
    margin-bottom: var(--space-m);
  }

  .help-article .toc {
    grid-template-columns: 1fr;
  }

  .article-navigation {
    grid-template-columns: 1fr;
  }

  .article-link-next {
    grid-column: auto;
    text-align: left;
  }
}