/**
 * Knowledge Base — public docs shell (LIGHT ONLY).
 * GitHub Docs–inspired UX; E74BYZ tokens. No dark mode.
 */

body.is-kb-nav-open {
  overflow: hidden;
  touch-action: none;
}

body.is-kb-nav-open .kb-docs__nav,
body.is-kb-nav-open .kb-docs .kb-nav {
  touch-action: pan-y;
}

.page-knowledge .site-main {
  padding: 0;
  margin: 0;
}

.kb-docs {
  /* Rails grow to viewport edges; center track ≈ site .shell width */
  --kb-rail-min: 18rem;
  --kb-prose-max: 46rem;
  --kb-shell: min(100% - (var(--e74-gutter) * 2), var(--e74-max));
  --kb-pad-x: clamp(1.1rem, 2vw, 1.75rem);
  --kb-toolbar-h: 3.25rem;
  /* Compact header default; desktop media bumps meta strip in */
  --kb-chrome-h: var(--e74-header-h-compact, 4rem);
  --kb-sticky-top: calc(var(--kb-chrome-h) + var(--kb-toolbar-h));
  --kb-sticky-max: calc(100vh - var(--kb-sticky-top));
  --kb-border: #d5dce3;
  --kb-border-soft: #e8edf2;
  --kb-surface: var(--e74-surface);
  --kb-muted: var(--e74-ink-muted);
  --kb-rail: color-mix(in srgb, var(--e74-ink) 4%, var(--e74-bg));
  width: 100%;
  max-width: none;
  margin: 0;
  padding: 0;
  background: var(--e74-bg);
  border-top: 1px solid var(--kb-border);
}

.kb-docs__toolbar {
  border-bottom: 1px solid var(--kb-border);
  background: var(--kb-surface);
  position: sticky;
  top: var(--kb-chrome-h);
  z-index: 25;
}

.kb-docs__toolbar-inner {
  display: flex;
  align-items: center;
  gap: 1rem;
  min-height: var(--kb-toolbar-h);
  width: 100%;
  max-width: none;
  margin: 0;
  padding: 0.55rem var(--e74-gutter);
  box-sizing: border-box;
}

.kb-docs__toolbar-tools {
  display: flex;
  flex: 0 1 18rem;
  width: 100%;
  max-width: 20rem;
  min-width: 10rem;
  margin-left: auto;
  order: 2;
}

.kb-docs__toolbar-tools-inner {
  display: flex;
  align-items: center;
  width: 100%;
  min-width: 0;
}

.kb-docs__toolbar-bc {
  flex: 1 1 auto;
  min-width: 0;
  overflow: hidden;
  order: 1;
}

.kb-docs__nav-toggle {
  display: none;
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  font-weight: 500;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  border: 1px solid var(--kb-border);
  background: var(--e74-bg);
  color: var(--e74-ink);
  padding: 0.4rem 0.7rem;
  border-radius: var(--e74-radius-control);
  cursor: pointer;
}

.kb-docs__nav-toggle:focus-visible {
  outline: 2px solid var(--e74-accent);
  outline-offset: 2px;
}

.kb-docs__search {
  flex: 1 1 auto;
  width: 100%;
  max-width: none;
  min-width: 0;
  margin-left: 0;
  position: relative;
}

.kb-docs__search-input {
  width: 100%;
  border: 1px solid var(--kb-border);
  background: var(--e74-bg);
  color: var(--e74-ink);
  border-radius: var(--e74-radius-control);
  padding: 0.48rem 2.4rem 0.48rem 0.8rem;
  font-family: var(--font-ui);
  font-size: 0.92rem;
  line-height: 1.3;
}

.kb-docs__search-input:focus {
  outline: 2px solid color-mix(in srgb, var(--e74-accent) 55%, transparent);
  outline-offset: 1px;
  border-color: var(--e74-accent);
}

.kb-docs__search-hint {
  position: absolute;
  right: 0.55rem;
  top: 50%;
  transform: translateY(-50%);
  font-family: var(--font-mono);
  font-size: 0.65rem;
  color: var(--kb-muted);
  border: 1px solid var(--kb-border-soft);
  border-radius: 3px;
  padding: 0.1rem 0.35rem;
  background: var(--kb-surface);
}

/*
 * Full-bleed grid: left rail from viewport edge; center ≈ .shell when TOC present.
 * Rail columns stretch with main content (no 100vh min-height) so they end
 * before the footer. Inner panels are sticky under header + toolbar.
 */
.kb-docs__shell {
  display: grid;
  grid-template-columns:
    minmax(var(--kb-rail-min), 22rem)
    minmax(0, 1fr);
  align-items: stretch;
  gap: 0;
  width: 100%;
  max-width: none;
  margin: 0;
  background: transparent;
}

/* Article + TOC: three columns, equal side rails, center capped to site shell */
.kb-docs--has-toc .kb-docs__shell {
  grid-template-columns:
    minmax(var(--kb-rail-min), 1fr)
    minmax(0, min(var(--kb-shell), calc(100% - (2 * var(--kb-rail-min)))))
    minmax(var(--kb-rail-min), 1fr);
}

.kb-docs__backdrop {
  display: none;
}

.kb-docs__nav {
  grid-column: 1;
  box-sizing: border-box;
  width: 100%;
  min-width: 0;
  margin: 0;
  padding: 0;
  font-family: var(--font-ui);
  font-size: 0.875rem;
  background: var(--kb-rail);
  border-right: 1px solid var(--kb-border);
}

.kb-docs__nav-panel {
  position: sticky;
  top: var(--kb-sticky-top);
  z-index: 2;
  box-sizing: border-box;
  max-height: var(--kb-sticky-max);
  overflow: auto;
  overscroll-behavior: contain;
  padding: 1rem 1.15rem 2.5rem 1rem;
  scrollbar-width: thin;
}

.kb-docs__nav-head {
  display: none;
}

.kb-docs__main {
  grid-column: 2;
  min-width: 0;
  width: 100%;
  background: var(--e74-bg);
  padding: 1.75rem var(--kb-pad-x) 3rem;
}

.kb-docs--has-toc .kb-docs__main {
  grid-column: 2;
}

.kb-docs__main-inner {
  width: 100%;
  max-width: none;
}

.kb-docs__toc {
  grid-column: 3;
  box-sizing: border-box;
  width: 100%;
  min-width: 0;
  margin: 0;
  padding: 0;
  background: color-mix(in srgb, var(--e74-accent) 9%, var(--e74-bg));
  border-left: 1px solid var(--kb-border);
}

.kb-docs__toc-panel {
  position: sticky;
  top: var(--kb-sticky-top);
  z-index: 2;
  box-sizing: border-box;
  max-height: var(--kb-sticky-max);
  overflow: auto;
  overscroll-behavior: contain;
  padding: 1.25rem max(0.85rem, var(--e74-gutter)) 2.5rem 1.1rem;
  scrollbar-width: thin;
}

/* No TOC: drop the empty spacer so the main column can use the width */
.kb-docs__toc--empty {
  display: none;
}

@media (min-width: 1100px) {
  .kb-docs {
    /* meta strip + main header row (matches .site-header--inner desktop) */
    --kb-chrome-h: calc(
      var(--e74-header-inner-h, 5rem) + var(--e74-header-meta-h, 2.25rem)
    );
  }

  /* Meta strip collapses on scroll — keep sticky rails flush under remaining header */
  body:has(.site-header.is-scrolled) .kb-docs {
    --kb-chrome-h: var(--e74-header-inner-h, 5rem);
  }
}

.kb-docs__toc-label {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  font-weight: 500;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--kb-muted);
  margin: 0 0 0.85rem;
}

.kb-docs__toc-list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.kb-docs__toc-item a {
  display: block;
  padding: 0.32rem 0 0.32rem 0.7rem;
  border-left: 2px solid transparent;
  color: var(--kb-muted);
  text-decoration: none;
  font-size: 0.875rem;
  line-height: 1.4;
}

.kb-docs__toc-item--h3 a {
  padding-left: 1.25rem;
  font-size: 0.84rem;
}

.kb-docs__toc-item a:hover,
.kb-docs__toc-item a:focus-visible {
  color: var(--e74-ink);
}

.kb-docs__toc-item.is-active a {
  color: var(--e74-ink);
  font-weight: 600;
  border-left-color: var(--e74-accent);
}

/* —— Left nav tree —— */
.kb-nav__roots,
.kb-nav__articles {
  list-style: none;
  margin: 0;
  padding: 0;
}

.kb-nav__roots {
  border-top: 1px solid var(--kb-border);
}

.kb-nav__group {
  margin: 0;
  border-bottom: 1px solid var(--kb-border);
  padding: 0.1rem 0;
}

.kb-nav__group-head {
  display: flex;
  align-items: center;
  gap: 0.1rem;
  min-height: 2rem;
}

.kb-nav__group-head:hover {
  background: color-mix(in srgb, var(--e74-accent) 6%, transparent);
}

.kb-nav__toggle {
  flex: 0 0 auto;
  width: 1.35rem;
  height: 1.4rem;
  border: 0;
  background: transparent;
  padding: 0;
  cursor: pointer;
  color: var(--kb-muted);
  border-radius: 0.25rem;
}

.kb-nav__toggle:hover {
  color: var(--e74-ink);
}

.kb-nav__toggle:focus-visible {
  outline: 2px solid var(--e74-accent);
  outline-offset: 1px;
}

.kb-nav__toggle--spacer {
  pointer-events: none;
  visibility: hidden;
}

.kb-nav__chevron {
  display: block;
  width: 0.38rem;
  height: 0.38rem;
  margin: 0.4rem auto 0;
  border-right: 1.6px solid currentColor;
  border-bottom: 1.6px solid currentColor;
  transform: rotate(-45deg);
  transition: transform 0.15s ease;
}

.kb-nav__group.is-open > .kb-nav__group-head .kb-nav__chevron,
.kb-nav__subgroup.is-open > .kb-nav__group-head .kb-nav__chevron {
  transform: rotate(45deg);
  margin-top: 0.32rem;
}

.kb-nav__cat {
  flex: 1;
  min-width: 0;
  color: var(--e74-ink);
  text-decoration: none;
  font-weight: 600;
  font-size: 0.875rem;
  line-height: 1.3;
  padding: 0.35rem 0.35rem 0.35rem 0.15rem;
}

.kb-nav__cat--sub {
  font-weight: 600;
  font-size: 0.84rem;
}

.kb-nav__cat:hover {
  color: var(--e74-accent);
}

.kb-nav__cat.is-active {
  color: var(--e74-accent);
}

.kb-nav__group-body {
  padding: 0.05rem 0 0.35rem;
}

.kb-nav__articles {
  margin: 0.05rem 0 0.15rem 0.4rem;
  padding-left: 0.55rem;
  border-left: 1px solid var(--kb-border);
}

.kb-nav__article {
  display: block;
  position: relative;
  padding: 0.28rem 0.5rem 0.28rem 0.55rem;
  margin: 0.04rem 0;
  border-radius: 0.25rem;
  color: var(--kb-muted);
  text-decoration: none;
  font-size: 0.84rem;
  line-height: 1.35;
}

.kb-nav__article:hover {
  color: var(--e74-ink);
  background: color-mix(in srgb, var(--e74-accent) 7%, transparent);
}

.kb-nav__article.is-active {
  color: var(--e74-ink);
  font-weight: 600;
  background: color-mix(in srgb, var(--e74-accent) 10%, var(--kb-surface));
  box-shadow: inset 3px 0 0 var(--e74-accent);
}

.kb-nav__subgroup {
  margin: 0.35rem 0 0.2rem 0.35rem;
  padding-left: 0.4rem;
  border-left: 1px solid var(--kb-border);
}

.kb-nav__subgroup .kb-nav__articles {
  margin-left: 0.2rem;
}

.kb-nav__subgroup .kb-nav__group-head {
  min-height: 1.85rem;
}

/* —— Breadcrumb (toolbar row) —— */
.kb-docs__toolbar-bc .kb-breadcrumb {
  margin: 0;
}

.kb-breadcrumb {
  margin-bottom: 0;
}

.kb-breadcrumb__list {
  display: flex;
  flex-wrap: nowrap;
  align-items: center;
  gap: 0;
  list-style: none;
  margin: 0;
  padding: 0;
  font-size: 0.875rem;
  color: var(--kb-muted);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.kb-breadcrumb__item {
  display: inline-flex;
  align-items: center;
  min-width: 0;
}

.kb-breadcrumb__item:last-child {
  overflow: hidden;
  text-overflow: ellipsis;
}

.kb-breadcrumb__sep {
  margin: 0 0.45rem;
  color: #b0b8c0;
  flex: 0 0 auto;
}

.kb-breadcrumb a {
  color: var(--kb-muted);
  text-decoration: none;
}

.kb-breadcrumb a:hover {
  color: var(--e74-accent);
}

.kb-breadcrumb [aria-current="page"] {
  color: var(--e74-ink);
  font-weight: 500;
  overflow: hidden;
  text-overflow: ellipsis;
}

/* —— Home —— */
.kb-home__intro {
  margin-bottom: 2.25rem;
  max-width: 38rem;
}

.kb-home__eyebrow {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--e74-accent);
  margin: 0 0 0.65rem;
  font-weight: 500;
}

.kb-home__title {
  font-family: var(--font-display);
  font-size: clamp(1.9rem, 2.6vw, 2.55rem);
  letter-spacing: var(--e74-tracking-heading);
  font-weight: 600;
  line-height: 1.15;
  margin: 0 0 0.75rem;
  color: var(--e74-ink);
}

.kb-home__lead {
  margin: 0;
  color: var(--kb-muted);
  font-size: 1.08rem;
  line-height: 1.55;
}

.kb-home__section {
  margin-bottom: 2.5rem;
  padding-bottom: 2.5rem;
  border-bottom: 1px solid var(--kb-border);
}

.kb-home__section:last-child {
  margin-bottom: 0;
  padding-bottom: 0;
  border-bottom: 0;
}

.kb-home__section-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 0.65rem;
}

.kb-home__section-label {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--kb-muted);
  margin: 0;
  font-weight: 500;
}

.kb-home__section-lead {
  margin: 0 0 1rem;
  color: var(--kb-muted);
  font-size: 0.95rem;
  line-height: 1.45;
}

/* Continuous tile / category grids (shared borders, GitHub Docs style) */
.kb-home__tiles,
.kb-home__grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0;
  border-top: 1px solid var(--kb-border);
  border-left: 1px solid var(--kb-border);
  background: var(--kb-surface);
}

.kb-home__tile,
.kb-home__group {
  border-right: 1px solid var(--kb-border);
  border-bottom: 1px solid var(--kb-border);
  border-radius: 0;
  margin: 0;
  min-width: 0;
  background: transparent;
  transition: background-color 0.15s ease;
}

.kb-home__tile {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  padding: 1.2rem 1.15rem 1.3rem;
  text-decoration: none;
  color: inherit;
}

.kb-home__group {
  display: flex;
  flex-direction: column;
  padding: 1.25rem 1.2rem 1.15rem;
}

.kb-home__tile:hover,
.kb-home__group:hover {
  background: color-mix(in srgb, var(--e74-accent) 12%, var(--kb-surface));
}

.kb-home__tile:focus-visible,
.kb-home__group-hit:focus-visible {
  outline: 2px solid var(--e74-accent);
  outline-offset: -2px;
}

.kb-home__tile-kicker {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--e74-accent);
  font-weight: 500;
}

.kb-home__tile-title {
  font-family: var(--font-display);
  font-size: 1.05rem;
  letter-spacing: var(--e74-tracking-heading-sm);
  font-weight: 600;
  line-height: 1.3;
  color: var(--e74-ink);
}

.kb-home__tile-desc {
  font-size: 0.88rem;
  line-height: 1.45;
  color: var(--kb-muted);
}

.kb-home__group-hit {
  display: block;
  text-decoration: none;
  color: inherit;
  margin-bottom: 0.55rem;
}

.kb-home__group-title {
  font-family: var(--font-display);
  font-size: 1.12rem;
  letter-spacing: var(--e74-tracking-heading-sm);
  margin: 0 0 0.4rem;
  font-weight: 600;
  color: var(--e74-ink);
  line-height: 1.25;
}

.kb-home__group:hover .kb-home__group-title {
  color: var(--e74-accent);
}

.kb-home__group-desc {
  margin: 0;
  color: var(--kb-muted);
  font-size: 0.9rem;
  line-height: 1.45;
}

.kb-home__link-list {
  list-style: none;
  margin: 0 0 0.65rem;
  padding: 0.15rem 0 0;
}

.kb-home__link-list li {
  position: relative;
  margin: 0;
  padding: 0;
  border-top: 0;
}

.kb-home__link-list li + li {
  margin-top: 0.15rem;
}

.kb-home__link-list a {
  display: block;
  position: relative;
  padding: 0.28rem 0 0.28rem 0.95rem;
  color: var(--e74-accent);
  text-decoration: none;
  font-size: 0.92rem;
  font-weight: 500;
  line-height: 1.35;
}

.kb-home__link-list a::before {
  content: "";
  position: absolute;
  left: 0.15rem;
  top: 0.72em;
  width: 0.35rem;
  height: 0.35rem;
  border-radius: 50%;
  background: var(--e74-accent);
  opacity: 0.85;
}

.kb-home__link-list a:hover {
  color: var(--e74-ink);
  text-decoration: underline;
  text-underline-offset: 0.15em;
}

.kb-home__link-list--articles a {
  color: var(--e74-accent);
  font-size: 0.9rem;
}

.kb-home__subgroup {
  margin-top: 0.55rem;
}

.kb-home__subgroup-title {
  display: block;
  margin: 0 0 0.15rem;
  font-family: var(--font-display);
  font-size: 0.88rem;
  font-weight: 600;
  letter-spacing: var(--e74-tracking-heading-sm);
  line-height: 1.3;
  color: var(--e74-ink);
  text-decoration: none;
}

.kb-home__subgroup-title:hover {
  color: var(--e74-accent);
}

.kb-home__group .kb-empty--soft {
  margin: 0.35rem 0 0.55rem;
  padding: 0;
  border: 0;
  font-size: 0.84rem;
  font-style: italic;
  color: var(--kb-muted);
  opacity: 0.9;
}

.kb-home__more {
  margin: auto 0 0;
  padding-top: 0.55rem;
}

.kb-home__more .btn {
  font-size: 0.68rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  padding: 0.22rem 0.55rem;
  min-height: 0;
  line-height: 1.25;
  gap: 0.25rem;
}

/* —— Category —— */
.kb-category {
  container-type: inline-size;
  container-name: kb-category;
}

.kb-category__title {
  font-family: var(--font-display);
  font-size: clamp(1.75rem, 2.4vw, 2.3rem);
  letter-spacing: var(--e74-tracking-heading);
  margin: 0 0 0.5rem;
  font-weight: 600;
}

.kb-category__desc {
  margin: 0 0 1.5rem;
  color: var(--kb-muted);
  max-width: 40rem;
  line-height: 1.5;
}

.kb-category__block {
  margin-bottom: 1.75rem;
}

.kb-category__block-title {
  font-family: var(--font-display);
  font-size: 1.15rem;
  letter-spacing: var(--e74-tracking-heading-sm);
  margin: 0 0 0.75rem;
  padding-bottom: 0.4rem;
  border-bottom: 1px solid var(--kb-border);
  font-weight: 600;
}

.kb-category__block-title a {
  color: inherit;
  text-decoration: none;
}

.kb-category__list {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0.85rem;
  list-style: none;
  margin: 0;
  padding: 0;
}

@media (min-width: 900px) {
  .kb-category__list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 1400px) {
  .kb-category__list {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@container kb-category (max-width: 35.99rem) {
  .kb-category__list {
    grid-template-columns: 1fr;
  }
}

@container kb-category (min-width: 36rem) and (max-width: 54.99rem) {
  .kb-category__list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@container kb-category (min-width: 55rem) {
  .kb-category__list {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

.kb-category__list > li {
  min-width: 0;
  border: 1px solid var(--kb-border);
  background: var(--kb-surface);
}

.kb-category__card {
  display: flex;
  flex-direction: column;
  height: 100%;
  padding: 1rem 1.05rem 1.1rem;
  text-decoration: none;
  color: inherit;
  box-sizing: border-box;
}

.kb-category__card:hover {
  background: color-mix(in srgb, var(--e74-accent) 8%, var(--kb-surface));
}

.kb-category__card:hover .kb-category__list-title {
  color: var(--e74-accent);
}

.kb-category__card:focus-visible {
  outline: 2px solid var(--e74-accent);
  outline-offset: -2px;
}

.kb-category__list-title {
  display: block;
  font-family: var(--font-display);
  font-size: 1.02rem;
  font-weight: 600;
  letter-spacing: var(--e74-tracking-heading-sm);
  line-height: 1.3;
  color: var(--e74-ink);
}

.kb-category__card-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.35rem;
  margin: 0.5rem 0 0;
}

.kb-category__card-meta .kb-article__pill {
  font-size: 0.65rem;
  padding: 0.18rem 0.5rem;
}

.kb-category__list-summary {
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
  margin-top: 0.45rem;
  color: var(--kb-muted);
  font-size: 0.86rem;
  line-height: 1.4;
}

/* —— Article —— */
.kb-article__title {
  font-family: var(--font-display);
  font-size: clamp(1.85rem, 2.6vw, 2.45rem);
  letter-spacing: var(--e74-tracking-heading);
  line-height: 1.15;
  margin: 0 0 0.7rem;
  font-weight: 600;
  max-width: var(--kb-prose-max);
}

.kb-article__summary {
  margin: 0 0 0.95rem;
  color: var(--e74-accent);
  font-size: 1.12rem;
  line-height: 1.5;
  max-width: var(--kb-prose-max);
}

.kb-article__meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.45rem;
  margin: 0 0 1.5rem;
  padding-bottom: 1.15rem;
  border-bottom: 1px solid var(--kb-border-soft);
}

.kb-article__pill {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  max-width: 100%;
  padding: 0.28rem 0.7rem;
  border-radius: 999px;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 500;
  letter-spacing: 0.02em;
  line-height: 1.3;
}

.kb-article__pill--read {
  color: var(--e74-ink);
  background: color-mix(in srgb, var(--e74-accent) 14%, var(--e74-bg));
}

.kb-article__pill--updated {
  color: var(--kb-muted);
  background: color-mix(in srgb, var(--e74-ink) 7%, var(--e74-bg));
}

.kb-article__meta-label {
  text-transform: none;
  letter-spacing: 0.01em;
}

.kb-article__pill--updated time {
  color: var(--e74-ink);
  font-weight: 500;
}

.kb-article__toc-mobile {
  display: none;
  margin: 0 0 1.25rem;
  border: 1px solid var(--kb-border);
  background: color-mix(in srgb, var(--e74-accent) 9%, var(--e74-bg));
  padding: 0.65rem 0.85rem;
  border-radius: var(--e74-radius);
}

.kb-article__toc-mobile summary {
  cursor: pointer;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--kb-muted);
}

.kb-article__toc-mobile ul {
  list-style: none;
  margin: 0.65rem 0 0;
  padding: 0;
}

.kb-article__toc-mobile a {
  display: block;
  padding: 0.25rem 0;
  color: var(--e74-ink);
  text-decoration: none;
  font-size: 0.88rem;
}

/* —— Prose —— */
.kb-prose {
  max-width: var(--kb-prose-max);
  font-family: var(--font-ui);
  font-size: 1.075rem;
  line-height: 1.72;
  color: var(--e74-ink);
}

.kb-prose > *:first-child {
  margin-top: 0;
}

.kb-prose h2 {
  font-family: var(--font-display);
  font-size: 1.45rem;
  letter-spacing: var(--e74-tracking-heading);
  font-weight: 600;
  margin: 2.4rem 0 0.9rem;
  padding-bottom: 0.45rem;
  border-bottom: 1px solid var(--kb-border-soft);
  scroll-margin-top: calc(var(--e74-header-inner-h, 5rem) + var(--kb-toolbar-h) + 1rem);
  position: relative;
}

.kb-prose h3 {
  font-family: var(--font-display);
  font-size: 1.2rem;
  letter-spacing: var(--e74-tracking-heading-sm);
  font-weight: 600;
  margin: 1.75rem 0 0.7rem;
  scroll-margin-top: calc(var(--e74-header-inner-h, 5rem) + var(--kb-toolbar-h) + 1rem);
  position: relative;
}

.kb-prose h2:hover::before,
.kb-prose h3:hover::before,
.kb-prose h2:focus-within::before,
.kb-prose h3:focus-within::before {
  content: "#";
  position: absolute;
  left: -0.9rem;
  color: var(--e74-accent);
  font-weight: 500;
  opacity: 0.7;
}

.kb-prose p {
  margin: 0 0 1rem;
}

.kb-prose a {
  color: var(--e74-accent);
  text-decoration-thickness: 1px;
  text-underline-offset: 0.15em;
}

.kb-prose a:hover {
  color: var(--e74-ink);
}

.kb-prose ul,
.kb-prose ol {
  margin: 0 0 1rem;
  padding-left: 1.35rem;
}

.kb-prose li {
  margin-bottom: 0.3rem;
}

.kb-prose blockquote {
  margin: 1.15rem 0;
  padding: 0.75rem 1rem;
  border-left: 3px solid var(--e74-accent);
  background: color-mix(in srgb, var(--e74-accent) 5%, var(--e74-bg));
  color: var(--e74-ink);
}

.kb-prose blockquote p:last-child {
  margin-bottom: 0;
}

.kb-prose blockquote:has(> p > strong:first-child) {
  border-left-color: var(--e74-ink);
}

.kb-prose hr {
  border: 0;
  border-top: 1px solid var(--kb-border);
  margin: 2rem 0;
}

.kb-prose code {
  font-family: var(--font-mono);
  font-size: 0.88em;
  background: #eef1f4;
  padding: 0.1em 0.35em;
  border-radius: 3px;
}

.kb-prose pre {
  margin: 1.15rem 0;
  padding: 0.9rem 1rem;
  background: #eef1f4;
  border: 1px solid var(--kb-border-soft);
  border-radius: var(--e74-radius);
  overflow-x: auto;
  max-width: 100%;
}

.kb-prose pre code {
  background: transparent;
  padding: 0;
  font-size: 0.86rem;
  line-height: 1.5;
}

.kb-prose .table-wrap,
.kb-prose table {
  display: block;
  width: 100%;
  max-width: min(100%, 52rem);
  overflow-x: auto;
  margin: 1.15rem 0;
}

.kb-prose table {
  border-collapse: collapse;
  font-size: 0.92rem;
}

.kb-prose th,
.kb-prose td {
  border: 1px solid var(--kb-border);
  padding: 0.45rem 0.65rem;
  text-align: left;
}

.kb-prose th {
  background: #eef1f4;
  font-weight: 600;
}

.kb-prose img {
  max-width: 100%;
  height: auto;
  display: block;
  margin: 1.15rem 0;
}

.kb-prose img.kb-prose__img--wide {
  max-width: min(100%, 52rem);
}

/* —— Gallery grid + lightbox swipe (:::gallery … :::) —— */
.kb-prose .kb-gallery {
  margin: 1.5rem 0;
  max-width: min(100%, 52rem);
}

.kb-prose .kb-gallery__grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(7rem, 1fr));
  gap: 0.45rem;
}

/* Fewer images → larger tiles; many images → more columns. */
.kb-prose .kb-gallery[data-kb-gallery-count="2"] .kb-gallery__grid,
.kb-prose .kb-gallery[data-kb-gallery-count="3"] .kb-gallery__grid,
.kb-prose .kb-gallery[data-kb-gallery-count="4"] .kb-gallery__grid {
  grid-template-columns: repeat(auto-fill, minmax(10rem, 1fr));
}

.kb-prose .kb-gallery[data-kb-gallery-count="5"] .kb-gallery__grid,
.kb-prose .kb-gallery[data-kb-gallery-count="6"] .kb-gallery__grid,
.kb-prose .kb-gallery[data-kb-gallery-count="7"] .kb-gallery__grid,
.kb-prose .kb-gallery[data-kb-gallery-count="8"] .kb-gallery__grid {
  grid-template-columns: repeat(auto-fill, minmax(8rem, 1fr));
}

.kb-prose .kb-gallery__item {
  appearance: none;
  border: 0;
  padding: 0;
  margin: 0;
  display: block;
  width: 100%;
  aspect-ratio: 1;
  overflow: hidden;
  border-radius: var(--e74-radius, 0.35rem);
  background: color-mix(in srgb, var(--e74-ink) 6%, var(--e74-surface));
  cursor: zoom-in;
}

.kb-prose .kb-gallery__item:focus-visible {
  outline: 2px solid var(--e74-accent, #fb5607);
  outline-offset: 2px;
}

.kb-prose .kb-gallery__item img {
  margin: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  transition: transform 0.25s ease;
}

.kb-prose .kb-gallery__item:hover img {
  transform: scale(1.04);
}

.kb-prose .kb-gallery__caption {
  margin: 0.45rem 0 0;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--kb-muted);
}

body.is-kb-gallery-open {
  overflow: hidden;
}

.kb-gallery-lightbox {
  position: fixed;
  inset: 0;
  z-index: 220;
  display: none;
  align-items: center;
  justify-content: center;
  padding: 2.5rem 1rem 3rem;
  background: rgba(12, 17, 22, 0.9);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}

.kb-gallery-lightbox.is-open {
  display: flex;
}

.kb-gallery-lightbox__stage {
  width: min(100%, 56rem);
  max-height: min(82vh, 44rem);
}

.kb-gallery-lightbox__swiper {
  width: 100%;
  height: 100%;
}

.kb-gallery-lightbox .swiper-slide {
  display: flex;
  align-items: center;
  justify-content: center;
}

.kb-gallery-lightbox .swiper-slide img {
  max-width: 100%;
  max-height: min(78vh, 42rem);
  width: auto;
  height: auto;
  object-fit: contain;
  border-radius: var(--e74-radius, 0.35rem);
}

.kb-gallery-lightbox__close {
  position: absolute;
  top: 0.85rem;
  right: 0.85rem;
  z-index: 3;
  width: 2.5rem;
  height: 2.5rem;
  border: 0;
  border-radius: 999px;
  background: color-mix(in srgb, #fff 14%, transparent);
  color: #fff;
  font-size: 1.5rem;
  line-height: 1;
  cursor: pointer;
}

.kb-gallery-lightbox__close:hover,
.kb-gallery-lightbox__close:focus-visible {
  background: color-mix(in srgb, #fff 28%, transparent);
  outline: none;
}

.kb-gallery-lightbox__nav {
  position: absolute;
  top: 50%;
  z-index: 3;
  transform: translateY(-50%);
  width: 2.6rem;
  height: 2.6rem;
  border: 0;
  border-radius: 999px;
  background: color-mix(in srgb, #fff 14%, transparent);
  color: #fff;
  cursor: pointer;
}

.kb-gallery-lightbox__nav--prev {
  left: 0.75rem;
}

.kb-gallery-lightbox__nav--next {
  right: 0.75rem;
}

.kb-gallery-lightbox__nav--prev::before,
.kb-gallery-lightbox__nav--next::before {
  content: "";
  display: block;
  width: 0.55rem;
  height: 0.55rem;
  margin: 0 auto;
  border-style: solid;
  border-color: currentColor;
  border-width: 0 0 2px 2px;
  transform: rotate(45deg);
}

.kb-gallery-lightbox__nav--next::before {
  border-width: 2px 2px 0 0;
}

.kb-gallery-lightbox__nav.swiper-button-disabled {
  opacity: 0.28;
  pointer-events: none;
}

.kb-gallery-lightbox__counter {
  position: absolute;
  bottom: 0.85rem;
  left: 0;
  right: 0;
  margin: 0;
  text-align: center;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: color-mix(in srgb, #fff 78%, transparent);
}

@media (max-width: 640px) {
  .kb-prose .kb-gallery__grid {
    grid-template-columns: repeat(auto-fill, minmax(5.5rem, 1fr));
  }

  .kb-gallery-lightbox__nav {
    width: 2.15rem;
    height: 2.15rem;
  }
}

/* —— Sources —— compact footnote block, not a second article —— */
.kb-sources {
  margin-top: 1.5rem;
  padding-top: 0.7rem;
  border-top: 1px solid var(--kb-border);
  max-width: var(--kb-prose-max);
}

.kb-sources__title {
  font-family: var(--font-mono);
  font-size: 0.62rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  margin: 0 0 0.4rem;
  color: var(--kb-muted);
  font-weight: 500;
}

.kb-sources__list {
  list-style: none;
  margin: 0;
  padding: 0;
  counter-reset: none;
}

.kb-sources__item {
  display: grid;
  grid-template-columns: 1.35rem 1fr;
  gap: 0.35rem;
  padding: 0.18rem 0;
  border-bottom: 0;
}

.kb-sources__index {
  font-family: var(--font-mono);
  font-size: 0.62rem;
  color: var(--kb-muted);
  padding-top: 0.18em;
}

.kb-sources__body {
  min-width: 0;
  line-height: 1.35;
}

.kb-sources__link,
.kb-sources__name {
  color: var(--e74-ink);
  font-size: 0.75rem;
  font-weight: 500;
  text-decoration: none;
}

.kb-sources__link:hover {
  color: var(--e74-accent);
}

.kb-sources__arrow {
  color: var(--e74-accent);
  margin-left: 0.15rem;
  font-size: 0.7em;
}

.kb-sources__publisher {
  display: inline;
  margin: 0;
  color: var(--kb-muted);
  font-size: 0.68rem;
}

.kb-sources__publisher::before {
  content: " · ";
}

/* —— Adjacent —— */
.kb-adjacent {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
  margin-top: 2.5rem;
  padding-top: 1.25rem;
  border-top: 1px solid var(--kb-border);
  max-width: min(100%, 52rem);
}

.kb-adjacent__link {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
  padding: 0.85rem 1rem;
  border: 1px solid var(--kb-border);
  background: var(--kb-surface);
  text-decoration: none;
  color: inherit;
  border-radius: var(--e74-radius);
  min-height: 4.5rem;
}

.kb-adjacent__link:hover {
  border-color: var(--e74-accent);
}

.kb-adjacent__link--next {
  text-align: right;
}

.kb-adjacent__dir {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--kb-muted);
}

.kb-adjacent__name {
  font-weight: 600;
  color: var(--e74-ink);
  font-size: 0.95rem;
}

/* —— Search —— */
.kb-search__title {
  font-family: var(--font-display);
  letter-spacing: var(--e74-tracking-heading);
  margin: 0 0 0.5rem;
  font-size: 1.75rem;
  font-weight: 600;
}

.kb-search__query {
  color: var(--kb-muted);
  margin: 0 0 1.25rem;
}

.kb-search__list {
  list-style: none;
  margin: 0;
  padding: 0;
  max-width: 42rem;
}

.kb-search__item {
  border-bottom: 1px solid var(--kb-border-soft);
}

.kb-search__link {
  display: block;
  padding: 0.85rem 0;
  text-decoration: none;
  color: inherit;
}

.kb-search__item-title {
  display: block;
  font-weight: 600;
  color: var(--e74-ink);
}

.kb-search__link:hover .kb-search__item-title {
  color: var(--e74-accent);
}

.kb-search__item-summary {
  display: block;
  margin-top: 0.25rem;
  color: var(--kb-muted);
  font-size: 0.9rem;
}

.kb-search__item-path {
  display: block;
  margin-top: 0.3rem;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--kb-muted);
}

.kb-empty {
  color: var(--kb-muted);
  margin: 1rem 0;
}

.kb-empty--soft {
  font-size: 0.88rem;
  margin: 0.35rem 0 0.75rem;
}

.visually-hidden {
  position: absolute !important;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* —— Tablet —— */
@media (max-width: 1099.98px) {
  .kb-docs {
    --kb-rail-min: 15.5rem;
    --kb-chrome-h: var(--e74-header-h-compact, 4rem);
  }

  .kb-docs__shell {
    grid-template-columns: minmax(var(--kb-rail-min), 19rem) minmax(0, 1fr);
  }

  .kb-docs__toc,
  .kb-docs__toc--empty {
    display: none;
  }

  .kb-article__toc-mobile {
    display: block;
  }

  .kb-home__tiles,
  .kb-home__grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

/* —— Mobile —— */
@media (max-width: 899px) {
  .kb-home__tiles,
  .kb-home__grid {
    grid-template-columns: 1fr;
  }

  .kb-docs {
    border-top: 0;
    --kb-toolbar-h: auto;
    --kb-chrome-h: var(--e74-header-h-compact, 4rem);
  }

  .kb-docs__nav-toggle {
    display: inline-flex;
    flex: 0 0 auto;
  }

  /* Row 1: Contents + Search (search dominates). Row 2: breadcrumbs. */
  .kb-docs__toolbar {
    top: var(--e74-header-h-compact, 4rem);
    background: var(--e74-header-inner-surface, var(--kb-surface));
    overflow: hidden;
  }

  .kb-docs__toolbar-inner {
    display: flex;
    flex-direction: column;
    align-items: stretch;
    gap: 0.45rem;
    padding: 0.55rem var(--e74-gutter);
    min-height: 0;
    transition: gap 0.36s cubic-bezier(0.4, 0, 0.2, 1);
  }

  /* Height/opacity are JS-only (WAAPI). A CSS height transition here
     interpolates to `auto` and flashes the bar after the animation ends. */
  .kb-docs__toolbar-tools {
    display: block;
    flex: none;
    width: 100%;
    max-width: none;
    min-width: 0;
    margin-left: 0;
    min-height: 0;
    order: 0;
    overflow: hidden;
    opacity: 1;
    transition: none;
  }

  .kb-docs__toolbar-tools-inner {
    display: grid;
    grid-template-columns: auto minmax(0, 1fr);
    align-items: center;
    gap: 0.65rem;
    min-height: 0;
  }

  .kb-docs__nav-toggle {
    grid-area: auto;
  }

  .kb-docs__search {
    grid-area: auto;
    flex: none;
    width: 100%;
    max-width: none;
    min-width: 0;
    margin-left: 0;
  }

  .kb-docs__search-hint {
    display: none;
  }

  .kb-docs__toolbar-bc {
    flex: none;
    width: 100%;
    min-width: 0;
    overflow: visible;
  }

  /* Resting compact only — not while WAAPI is interpolating. */
  .kb-docs.is-toolbar-compact:not(.is-toolbar-animating) .kb-docs__toolbar-tools {
    height: 0;
    opacity: 0;
    pointer-events: none;
  }

  .kb-docs.is-toolbar-compact .kb-docs__toolbar-inner {
    gap: 0;
  }

  .kb-docs.is-toolbar-compact .kb-docs__nav-toggle,
  .kb-docs.is-toolbar-compact .kb-docs__search-input {
    pointer-events: none;
  }

  .kb-docs.is-toolbar-animating .kb-docs__toolbar-tools {
    pointer-events: none;
  }

  @media (prefers-reduced-motion: reduce) {
    .kb-docs__toolbar-inner {
      transition: none;
    }
  }

  .kb-docs__shell {
    display: block;
    width: var(--kb-shell);
    max-width: 100%;
    margin-inline: auto;
    min-height: 0;
    justify-content: initial;
  }

  .kb-docs__toc,
  .kb-docs__toc--empty {
    display: none;
  }

  .kb-docs__nav {
    grid-column: auto;
    position: fixed;
    top: 0;
    left: 0;
    right: auto;
    bottom: 0;
    width: min(21rem, 90vw);
    height: 100%;
    height: 100dvh;
    max-height: 100dvh;
    z-index: 80;
    display: flex;
    flex-direction: column;
    background: var(--kb-surface);
    border: 0;
    border-right: 1px solid var(--kb-border);
    padding: 0;
    transform: translateX(-105%);
    transition: transform 0.2s ease;
    /* Scroll lives on .kb-nav — overflow+transform on same node breaks iOS */
    overflow: hidden;
    overscroll-behavior: contain;
    -webkit-backface-visibility: hidden;
    backface-visibility: hidden;
  }

  .kb-docs.is-nav-open .kb-docs__nav {
    transform: translateX(0);
  }

  .kb-docs__nav-panel {
    position: static;
    top: auto;
    z-index: auto;
    max-height: none;
    overflow: hidden;
    overscroll-behavior: contain;
    padding: 0;
    flex: 1 1 auto;
    min-height: 0;
    display: flex;
    flex-direction: column;
  }

  .kb-docs__nav-head {
    display: flex;
    flex: 0 0 auto;
    align-items: center;
    justify-content: space-between;
    padding: 0.85rem 1rem;
    border-bottom: 1px solid var(--kb-border-soft);
    position: relative;
    top: auto;
    background: var(--kb-surface);
    z-index: 1;
  }

  .kb-docs__nav-title {
    font-family: var(--font-mono);
    font-size: 0.72rem;
    letter-spacing: 0.08em;
    text-transform: uppercase;
  }

  .kb-docs__nav-close {
    border: 0;
    background: transparent;
    font-size: 1.5rem;
    line-height: 1;
    cursor: pointer;
    color: var(--kb-muted);
  }

  .kb-docs .kb-nav {
    flex: 1 1 auto;
    min-height: 0;
    overflow-x: hidden;
    overflow-y: auto;
    -webkit-overflow-scrolling: touch;
    overscroll-behavior: contain;
    touch-action: pan-y;
    padding: 0.75rem 0.85rem 2.5rem;
  }

  .kb-docs__backdrop {
    display: block;
    position: fixed;
    inset: 0;
    background: rgba(14, 19, 24, 0.4);
    z-index: 70;
  }

  .kb-docs__backdrop[hidden] {
    display: none !important;
  }

  .kb-docs__main {
    width: 100%;
    max-width: none;
    padding: 1.15rem 0 2.5rem;
  }

  .kb-docs__main-inner,
  .kb-docs--home .kb-docs__main-inner,
  .kb-docs--has-toc .kb-docs__main-inner {
    max-width: none;
    width: 100%;
  }

  .kb-category__list {
    grid-template-columns: 1fr;
  }

  .kb-article__title,
  .kb-article__summary,
  .kb-prose {
    max-width: none;
  }

  .kb-article__meta {
    flex-wrap: wrap;
    gap: 0.4rem;
    margin: 0 0 1.1rem;
    padding-bottom: 0.85rem;
    white-space: normal;
    overflow: visible;
  }

  .kb-article__pill {
    font-size: 0.68rem;
    padding: 0.24rem 0.6rem;
  }

  .kb-article__summary {
    font-size: 1rem;
  }

  .kb-adjacent {
    grid-template-columns: 1fr;
  }

  .kb-adjacent__link--next {
    text-align: left;
  }

  .kb-prose h2:hover::before,
  .kb-prose h3:hover::before {
    display: none;
  }

  .kb-breadcrumb__list {
    display: flex;
    flex-wrap: wrap;
    align-items: baseline;
    row-gap: 0.2rem;
    column-gap: 0;
    overflow: visible;
    text-overflow: unset;
    white-space: normal;
    font-size: 0.8rem;
    line-height: 1.4;
  }

  .kb-breadcrumb__item,
  .kb-breadcrumb__item:last-child {
    display: inline;
    overflow: visible;
    text-overflow: unset;
    white-space: normal;
    max-width: 100%;
  }

  .kb-breadcrumb__sep {
    display: inline;
    margin: 0 0.4rem;
  }

  .kb-breadcrumb [aria-current="page"] {
    overflow: visible;
    text-overflow: unset;
    white-space: normal;
    overflow-wrap: anywhere;
    word-break: break-word;
  }
}

/* —— Print —— */
@media print {
  .site-header,
  .site-footer,
  .kb-docs__toolbar,
  .kb-docs__nav,
  .kb-docs__toc,
  .kb-docs__nav-toggle,
  .kb-article__toc-mobile,
  .kb-adjacent {
    display: none !important;
  }

  .kb-docs__shell {
    display: block;
  }

  .kb-prose {
    max-width: none;
  }

  .page-knowledge,
  .page-knowledge-article {
    background: #fff;
  }
}

/* Force light even if OS prefers dark */
@media (prefers-color-scheme: dark) {
  .page-knowledge,
  .page-knowledge-article,
  .kb-docs {
    color-scheme: light;
  }
}