/* ============================================================
   SU ITS Data & AI — Doc Page Styles
   ============================================================
   Used for every individual KB article. Three-column layout
   (sidebar / content / TOC) modeled on docs.stripe.com and
   docs.anthropic.com — clean docs density, not Quartz's
   digital-garden chrome.
   ============================================================ */

/* ── Doc Layout ────────────────────────────────────────── */

.doc {
  padding-top: var(--nav-height);
  min-height: 100vh;
  background: var(--su-white);
  display: grid;
  grid-template-columns: var(--sidebar-width) 1fr var(--toc-width);
  gap: 0;
  max-width: 1440px;
  margin: 0 auto;
}

@media (max-width: 1180px) {
  .doc {
    grid-template-columns: var(--sidebar-width) 1fr;
  }
}

@media (max-width: 880px) {
  .doc {
    grid-template-columns: 1fr;
  }
}

/* ── Sidebar (left) ─────────────────────────────────────── */

.doc-sidebar {
  position: sticky;
  top: var(--nav-height);
  align-self: start;
  height: calc(100vh - var(--nav-height));
  overflow-y: auto;
  padding: var(--space-6) var(--space-5) var(--space-6) var(--space-6);
  border-right: 1px solid var(--color-border);
  background: var(--su-pale-gray);
  scrollbar-width: thin;
  scrollbar-color: rgba(0, 14, 84, 0.2) transparent;
}

.doc-sidebar::-webkit-scrollbar {
  width: 6px;
}

.doc-sidebar::-webkit-scrollbar-track {
  background: transparent;
}

.doc-sidebar::-webkit-scrollbar-thumb {
  background: rgba(0, 14, 84, 0.15);
  border-radius: 3px;
}

.sidebar-eyebrow {
  font-size: var(--fs-eyebrow);
  font-weight: 700;
  letter-spacing: var(--tracking-eyebrow);
  text-transform: uppercase;
  color: var(--su-medium-grey);
  margin-bottom: var(--space-3);
  display: block;
}

/* Collapsible section navigation (the doc sidebar tree) */
.doc-nav {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

/* Dept home + root pages */
.nav-home {
  display: block;
  padding: 0.4375rem var(--space-3);
  border-radius: var(--radius-sm);
  font-size: 0.9375rem;
  font-weight: 600;
  color: var(--su-blue);
  text-decoration: none;
  transition: background var(--duration-fast) ease, color var(--duration-fast) ease;
}

.nav-home--sub {
  font-weight: 500;
  color: var(--su-dark-grey);
}

.nav-home:hover {
  background: var(--su-blue-10);
  text-decoration: none;
}

.nav-home[aria-current="page"] {
  background: var(--su-orange-10);
  color: var(--su-orange-deep);
  font-weight: 700;
}

/* Group = native <details>; summary is the section header + count + chevron */
.nav-group {
  margin-top: 2px;
}

.nav-summary {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: 0.4375rem var(--space-3);
  border-radius: var(--radius-sm);
  cursor: pointer;
  list-style: none;
  font-size: 0.8125rem;
  font-weight: 700;
  letter-spacing: 0.03em;
  text-transform: uppercase;
  color: var(--su-blue);
  transition: background var(--duration-fast) ease;
}

.nav-summary::-webkit-details-marker {
  display: none;
}

.nav-summary:hover {
  background: var(--su-blue-10);
}

.nav-summary::before {
  content: "";
  width: 0.4rem;
  height: 0.4rem;
  border-right: 2px solid currentColor;
  border-bottom: 2px solid currentColor;
  transform: rotate(-45deg);
  transition: transform var(--duration-fast) ease;
  opacity: 0.55;
  flex-shrink: 0;
}

.nav-group[open] > .nav-summary::before {
  transform: rotate(45deg);
}

.nav-label {
  flex: 1;
}

.nav-count {
  font-size: 0.6875rem;
  font-weight: 700;
  letter-spacing: 0;
  color: var(--su-medium-grey);
  background: var(--su-blue-10);
  border-radius: 999px;
  padding: 0.05rem 0.4rem;
}

.nav-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 1px;
  margin: 2px 0 var(--space-3);
}

.nav-list a {
  display: block;
  padding: 0.375rem var(--space-3) 0.375rem var(--space-5);
  border-radius: var(--radius-sm);
  font-size: 0.9063rem;
  line-height: 1.4;
  color: var(--su-dark-grey);
  text-decoration: none;
  transition: background var(--duration-fast) ease, color var(--duration-fast) ease;
}

.nav-list a:hover {
  background: var(--su-blue-10);
  color: var(--su-blue);
  text-decoration: none;
}

.nav-list a[aria-current="page"] {
  background: var(--su-orange-10);
  color: var(--su-orange-deep);
  font-weight: 700;
}

/* Nested subgroup (e.g. Example Uses under Claude) */
.nav-sub {
  margin-top: 0.25rem;
}

.nav-sub-title {
  display: block;
  padding: 0.25rem var(--space-3) 0.25rem var(--space-5);
  font-size: 0.6875rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--su-medium-grey);
}

.nav-sublist {
  list-style: none;
}

.nav-sublist a {
  padding-left: var(--space-7);
  font-size: 0.875rem;
}

@media (max-width: 880px) {
  .doc-sidebar {
    display: none;
  }
}

/* ── Article (center column) ───────────────────────────── */

.doc-article {
  padding: var(--space-7) var(--space-7) var(--space-9);
  max-width: 780px;
  width: 100%;
  margin: 0 auto;
}

/* Mobile document navigation */
.mobile-doc-nav {
  display: none;
  margin-bottom: var(--space-6);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--su-white);
  box-shadow: var(--shadow-sm);
}

/* Scoped to the OUTER toggle (`> summary`) so nested group summaries keep
   their own chevron / styling. */
.mobile-doc-nav > summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
  padding: var(--space-4) var(--space-5);
  color: var(--su-blue);
  cursor: pointer;
  font-weight: 700;
  list-style: none;
}

.mobile-doc-nav > summary::-webkit-details-marker {
  display: none;
}

.mobile-doc-nav > summary::after {
  content: "";
  width: 0.55rem;
  height: 0.55rem;
  border-right: 2px solid currentColor;
  border-bottom: 2px solid currentColor;
  transform: rotate(45deg);
  transition: transform var(--duration-fast) ease;
  flex-shrink: 0;
}

.mobile-doc-nav[open] > summary::after {
  transform: rotate(225deg);
}

.mobile-doc-nav-panel {
  padding: var(--space-3) var(--space-4) var(--space-4);
  border-top: 1px solid var(--color-border);
}

@media (max-width: 880px) {
  .mobile-doc-nav {
    display: block;
  }
}

@media (max-width: 880px) {
  .doc-article {
    padding: var(--space-6) var(--space-5) var(--space-7);
  }
}

/* Breadcrumbs */
.breadcrumbs {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin-bottom: var(--space-5);
  font-size: var(--fs-small);
  color: var(--color-text-muted);
}

.breadcrumbs a {
  color: var(--color-text-muted);
  text-decoration: none;
  transition: color var(--duration-fast) ease;
}

.breadcrumbs a:hover {
  color: var(--su-orange-dark);
  text-decoration: none;
}

.breadcrumbs-sep {
  color: var(--su-light-grey);
  font-size: 0.875rem;
  line-height: 1;
}

.breadcrumbs-current {
  color: var(--su-blue);
  font-weight: 600;
}

/* Article header */
.article-header {
  margin-bottom: var(--space-7);
  padding-bottom: var(--space-6);
  border-bottom: 1px solid var(--color-border);
}

.article-header h1 {
  font-size: var(--fs-h1);
  font-weight: 700;
  line-height: var(--lh-tight);
  color: var(--su-blue);
  letter-spacing: var(--tracking-tight);
  margin-bottom: var(--space-4);
}

.article-lede {
  font-size: var(--fs-lead);
  line-height: var(--lh-normal);
  color: var(--color-text-muted);
  margin-bottom: var(--space-5);
}

/* ── Section hub pages (directory indexes) ─────────────── */
.hub-h {
  font-size: 0.8125rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--su-medium-grey);
  margin: var(--space-7) 0 var(--space-4);
}

.article-body > .hub-h:first-child {
  margin-top: var(--space-2);
}

/* Subsections: compact card grid */
.hub-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: var(--space-4);
}

.hub-card {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  padding: var(--space-5);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--su-white);
  text-decoration: none;
  transition: border-color var(--duration-fast) ease,
    box-shadow var(--duration-fast) ease, transform var(--duration-fast) ease;
}

.hub-card:hover {
  border-color: var(--su-blue);
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
  text-decoration: none;
}

.hub-card-title {
  font-size: 1.0625rem;
  font-weight: 700;
  color: var(--su-blue);
}

.hub-card-desc {
  font-size: 0.875rem;
  line-height: 1.5;
  color: var(--su-dark-grey);
  flex: 1;
}

.hub-card-foot {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-top: var(--space-2);
}

.hub-card-arrow {
  color: var(--su-orange-dark);
  font-weight: 700;
  transition: transform var(--duration-fast) ease;
}

.hub-card:hover .hub-card-arrow {
  transform: translateX(3px);
}

/* Pages: rich vertical list (distinct from the section grid for rhythm) */
.hub-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.hub-item {
  display: block;
  padding: var(--space-4) var(--space-5);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--su-white);
  text-decoration: none;
  transition: border-color var(--duration-fast) ease, box-shadow var(--duration-fast) ease;
}

.hub-item:hover {
  border-color: var(--su-blue);
  box-shadow: var(--shadow-sm);
  text-decoration: none;
}

.hub-item-head {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  margin-bottom: 0.35rem;
}

.hub-item-title {
  font-size: 1.0625rem;
  font-weight: 700;
  color: var(--su-blue);
}

.hub-item:hover .hub-item-title {
  color: var(--su-orange-deep);
}

.hub-item-desc {
  display: block;
  font-size: 0.9375rem;
  line-height: 1.55;
  color: var(--su-dark-grey);
}

.hub-item-aud {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
  margin-top: var(--space-3);
}

.hub-aud {
  font-size: 0.6875rem;
  font-weight: 600;
  text-transform: capitalize;
  color: var(--su-medium-grey);
  background: var(--su-xlight-grey);
  border-radius: var(--radius-pill);
  padding: 0.1rem 0.5rem;
}

@media (max-width: 600px) {
  .hub-grid {
    grid-template-columns: 1fr;
  }
}

.article-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-3) var(--space-5);
  font-size: var(--fs-small);
  color: var(--color-text-muted);
}

.article-meta-item {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
}

.article-meta-item svg {
  width: 14px;
  height: 14px;
  stroke: currentColor;
  fill: none;
  stroke-width: 2;
  flex-shrink: 0;
}

.article-meta-tags {
  display: inline-flex;
  gap: var(--space-2);
  flex-wrap: wrap;
}

/* Article body — typography */
.article-body {
  font-size: 1.0625rem;
  line-height: 1.75;
  color: var(--color-text);
}

.article-body > * + * {
  margin-top: var(--space-5);
}

.article-body h2 {
  font-size: 1.625rem;
  font-weight: 700;
  line-height: var(--lh-snug);
  color: var(--su-blue);
  letter-spacing: var(--tracking-tight);
  margin-top: var(--space-8);
  margin-bottom: var(--space-2);
  position: relative;
  scroll-margin-top: calc(var(--nav-height) + var(--space-4));
}

.article-body h2::before {
  content: "";
  position: absolute;
  left: -1rem;
  top: 0.5rem;
  bottom: 0.5rem;
  width: 3px;
  background: var(--su-orange);
  border-radius: 2px;
  opacity: 0;
  transform: scaleY(0.6);
  transform-origin: center;
  transition: opacity var(--duration-base) var(--ease-out),
    transform var(--duration-base) var(--ease-out);
}

.article-body h2:hover::before {
  opacity: 1;
  transform: scaleY(1);
}

.article-body h3 {
  font-size: 1.25rem;
  font-weight: 700;
  line-height: var(--lh-snug);
  color: var(--su-blue);
  margin-top: var(--space-7);
  margin-bottom: var(--space-1);
  scroll-margin-top: calc(var(--nav-height) + var(--space-4));
}

.article-body h4 {
  font-size: 1.0625rem;
  font-weight: 700;
  color: var(--su-blue);
  margin-top: var(--space-6);
  margin-bottom: 0;
}

.article-body p {
  color: var(--color-text);
}

.article-body strong {
  font-weight: 700;
  color: var(--su-blue);
}

.article-body em {
  font-style: italic;
}

.article-body ul,
.article-body ol {
  padding-left: 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

.article-body li::marker {
  color: var(--su-orange);
}

.article-body li > p {
  margin: 0;
}

/* Inline code */
.article-body code:not(pre code) {
  font-family: var(--font-mono);
  font-size: 0.875em;
  background: var(--su-orange-10);
  color: var(--su-orange-deep);
  padding: 0.1em 0.4em;
  border-radius: 4px;
  border: 1px solid rgba(247, 105, 0, 0.15);
}

/* Fenced code blocks */
.article-body pre {
  background: #0b1442;
  color: #e4e8ff;
  padding: var(--space-5);
  border-radius: var(--radius-md);
  overflow-x: auto;
  border: 1px solid rgba(255, 255, 255, 0.05);
  box-shadow: var(--shadow-md);
  font-family: var(--font-mono);
  font-size: 0.875rem;
  line-height: 1.6;
  position: relative;
}

.article-body pre code {
  font-family: inherit;
  font-size: inherit;
  color: inherit;
  background: none;
  border: none;
  padding: 0;
}

.article-body pre::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 3px;
  bottom: 0;
  background: var(--su-orange);
  border-radius: var(--radius-md) 0 0 var(--radius-md);
}

/* Callouts (note / warning / tip / info) */
.callout {
  display: flex;
  gap: var(--space-4);
  padding: var(--space-4) var(--space-5);
  border-radius: var(--radius-md);
  background: var(--su-pale-gray);
  border-left: 4px solid var(--su-blue);
}

.callout-icon {
  flex-shrink: 0;
  width: 22px;
  height: 22px;
  margin-top: 0.125rem;
  color: var(--su-blue);
}

.callout-body {
  flex: 1;
  font-size: 0.9375rem;
  line-height: 1.65;
}

.callout-title {
  font-weight: 700;
  color: var(--su-blue);
  margin-bottom: 0.25rem;
  font-size: 0.9375rem;
}

.callout--warning {
  background: var(--su-orange-10);
  border-left-color: var(--su-orange);
}

.callout--warning .callout-icon,
.callout--warning .callout-title {
  color: var(--su-orange-deep);
}

.callout--tip {
  background: #e9f4ff;
  border-left-color: var(--su-blue-light);
}

.callout--tip .callout-icon,
.callout--tip .callout-title {
  color: var(--su-blue);
}

.callout > div > p {
  margin: 0;
}

.callout > div > p + p {
  margin-top: 0.5rem;
}

/* Tables */
.article-body table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9375rem;
  margin-top: var(--space-5);
}

.article-body th {
  background: var(--su-blue);
  color: var(--su-white);
  text-align: left;
  padding: 0.625rem 0.875rem;
  font-weight: 700;
  font-size: 0.875rem;
  letter-spacing: 0.02em;
}

.article-body th:first-child {
  border-top-left-radius: var(--radius-sm);
}

.article-body th:last-child {
  border-top-right-radius: var(--radius-sm);
}

.article-body td {
  padding: 0.625rem 0.875rem;
  border-bottom: 1px solid var(--color-border);
  vertical-align: top;
}

.article-body tbody tr:nth-child(even) td {
  background: var(--su-pale-gray);
}

/* Wikilinks — styled internal links */
.article-body a.wikilink {
  color: var(--su-orange-dark);
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-decoration-color: rgba(215, 65, 0, 0.4);
  text-underline-offset: 0.18em;
  font-weight: 500;
  transition: color var(--duration-fast) ease, text-decoration-color var(--duration-fast) ease;
}

.article-body a.wikilink:hover {
  color: var(--su-orange-accessible);
  text-decoration-color: var(--su-orange-accessible);
}

/* External link indicator */
.article-body a[href^="http"]::after {
  content: " ↗";
  font-size: 0.85em;
  color: var(--su-medium-grey);
}

.article-body a[href^="http"]:hover::after {
  color: var(--su-orange-accessible);
}

/* Article footer (page meta + actions) */
.article-footer {
  margin-top: var(--space-9);
  padding-top: var(--space-6);
  border-top: 1px solid var(--color-border);
}

.article-actions {
  display: flex;
  gap: var(--space-3);
  flex-wrap: wrap;
  margin-bottom: var(--space-5);
}

.action-btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: 0.625rem var(--space-4);
  border-radius: var(--radius-md);
  background: var(--su-white);
  border: 1.5px solid var(--color-border-strong);
  color: var(--su-blue);
  font-family: var(--font-sans);
  font-weight: 600;
  font-size: var(--fs-small);
  text-decoration: none;
  cursor: pointer;
  transition: background var(--duration-fast) ease, border-color var(--duration-fast) ease,
    color var(--duration-fast) ease, transform var(--duration-fast) ease;
}

.action-btn svg {
  width: 16px;
  height: 16px;
  flex-shrink: 0;
}

.action-btn:hover {
  background: var(--su-blue-10);
  border-color: var(--su-blue);
  color: var(--su-blue);
  transform: translateY(-1px);
  text-decoration: none;
}

.action-btn--accent {
  background: var(--su-orange-accessible);
  border-color: var(--su-orange-accessible);
  color: var(--su-white);
}

.action-btn--accent:hover {
  background: var(--su-orange-deep);
  border-color: var(--su-orange-deep);
  color: var(--su-white);
}

.action-btn.is-copied {
  background: var(--su-blue);
  border-color: var(--su-blue);
  color: var(--su-white);
}

.article-footer-meta {
  display: flex;
  justify-content: space-between;
  gap: var(--space-4);
  font-size: var(--fs-small);
  color: var(--color-text-muted);
  flex-wrap: wrap;
}

.article-footer-source {
  font-size: var(--fs-small);
}

.article-footer-source code {
  font-family: var(--font-mono);
  font-size: 0.85em;
  background: var(--su-pale-gray);
  color: var(--su-blue);
  padding: 0.1em 0.4em;
  border-radius: 4px;
}

/* ── TOC (right rail) ──────────────────────────────────── */

.doc-toc {
  position: sticky;
  top: var(--nav-height);
  align-self: start;
  max-height: calc(100vh - var(--nav-height));
  overflow-y: auto;
  padding: var(--space-7) var(--space-6) var(--space-6) var(--space-4);
  font-size: var(--fs-small);
  border-left: 1px solid var(--color-border);
}

@media (max-width: 1180px) {
  .doc-toc {
    display: none;
  }
}

.toc-title {
  font-size: var(--fs-eyebrow);
  font-weight: 700;
  letter-spacing: var(--tracking-eyebrow);
  text-transform: uppercase;
  color: var(--su-medium-grey);
  margin-bottom: var(--space-3);
}

.toc-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 1px;
  border-left: 2px solid var(--color-border);
}

.toc-list a {
  display: block;
  padding: 0.3125rem var(--space-3);
  margin-left: -2px;
  border-left: 2px solid transparent;
  color: var(--color-text-muted);
  text-decoration: none;
  font-size: 0.875rem;
  line-height: 1.45;
  transition: color var(--duration-fast) ease, border-color var(--duration-fast) ease;
}

.toc-list a:hover {
  color: var(--su-orange-dark);
  text-decoration: none;
}

.toc-list a.is-active {
  color: var(--su-orange-dark);
  border-left-color: var(--su-orange);
  font-weight: 600;
}

.toc-sublist {
  list-style: none;
  margin-left: var(--space-3);
}

.toc-sublist a {
  font-size: 0.8125rem;
}