/* ====================================================================
   DOCS SUB-HEADER
   ==================================================================== */
.docs-subnav {
  background: var(--gray-25);
  border-bottom: 1px solid var(--border-subtle);
  position: sticky;
  top: 64px;
  z-index: 40;
}
.docs-subnav-inner {
  max-width: 1440px;
  margin: 0 auto;
  padding: 12px 32px;
  display: flex; align-items: center; gap: 24px;
}
.breadcrumb {
  display: flex; align-items: center; gap: 8px;
  font-size: var(--text-sm);
  color: var(--fg-muted);
}
.breadcrumb .sep { color: var(--gray-300); }
.breadcrumb a { color: var(--fg-muted); }
.breadcrumb a:hover { color: var(--brand-500); }
.breadcrumb .current { color: var(--gray-900); font-weight: 500; }

.docs-search {
  flex: 1; max-width: 480px;
  position: relative;
}
.docs-search input {
  width: 100%;
  height: 36px;
  padding: 0 12px 0 38px;
  border: 1px solid var(--border-default);
  border-radius: var(--radius-md);
  background: var(--gray-0);
  font-family: inherit;
  font-size: var(--text-sm);
  color: var(--gray-800);
  outline: none;
  transition: border-color var(--duration-fast) var(--ease-standard),
              box-shadow var(--duration-fast) var(--ease-standard);
}
.docs-search input:focus { border-color: var(--brand-500); box-shadow: var(--ring-focus); }
.docs-search input::placeholder { color: var(--fg-subtle); }
.docs-search .search-icon {
  position: absolute;
  left: 12px; top: 50%;
  transform: translateY(-50%);
  width: 16px; height: 16px;
  color: var(--fg-subtle);
}
.docs-search .kbd {
  position: absolute;
  right: 8px; top: 50%;
  transform: translateY(-50%);
  background: var(--gray-100);
  border: 1px solid var(--border-default);
  border-radius: 3px;
  padding: 2px 6px;
  font-size: 11px;
  color: var(--fg-muted);
  font-family: var(--font-mono);
}

.docs-version {
  display: flex; align-items: center; gap: 6px;
  background: var(--gray-0);
  border: 1px solid var(--border-default);
  border-radius: var(--radius-md);
  padding: 6px 12px;
  font-size: var(--text-sm);
  color: var(--gray-700);
}
.docs-version .icon { width: 14px; height: 14px; }
.docs-version-label { color: var(--fg-subtle); font-size: var(--text-xs); }

/* ====================================================================
   DOCS LAYOUT (three-column)
   ==================================================================== */
.docs-layout {
  max-width: 1440px;
  margin: 0 auto;
  padding: 32px;
  display: grid;
  grid-template-columns: 240px 1fr 240px;
  gap: 48px;
  align-items: start;
}

/* ====================================================================
   LEFT TOC
   ==================================================================== */
.docs-toc {
  position: sticky;
  top: 132px;
  max-height: calc(100vh - 152px);
  overflow-y: auto;
  font-size: var(--text-sm);
}
.toc-section { margin-bottom: 18px; }
.toc-section-title {
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.06em;
  color: var(--fg-subtle);
  text-transform: uppercase;
  margin: 0 0 10px;
  padding-left: 12px;
}
.toc-link {
  display: flex; align-items: center; gap: 10px;
  padding: 7px 12px;
  border-radius: var(--radius-sm);
  color: var(--gray-700);
  font-weight: 400;
  transition: background var(--duration-fast) var(--ease-standard),
              color var(--duration-fast) var(--ease-standard);
}
.toc-link:hover { background: var(--gray-100); color: var(--brand-900); }
.toc-link .toc-num {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--fg-subtle);
  min-width: 16px;
  font-weight: 500;
}
.toc-link.active {
  background: var(--brand-50);
  color: var(--brand-700);
  font-weight: 500;
}
.toc-link.active .toc-num { color: var(--brand-500); }

/* ====================================================================
   MAIN CONTENT
   ==================================================================== */
.docs-main { min-width: 0; max-width: 760px; }

.docs-chapter { padding-bottom: 48px; border-bottom: 1px solid var(--border-subtle); margin-bottom: 48px; }
.docs-chapter:last-child { border-bottom: none; margin-bottom: 0; }

.docs-main h2 {
  font-size: var(--text-2xl);
  font-weight: 600;
  color: var(--brand-900);
  margin: 0 0 16px;
  letter-spacing: 0.02em;
  scroll-margin-top: 132px;
  padding-bottom: 12px;
  border-bottom: 2px solid var(--brand-100);
}
.docs-main h3 {
  font-size: var(--text-lg);
  font-weight: 600;
  color: var(--gray-900);
  margin: 32px 0 12px;
  scroll-margin-top: 132px;
}
.docs-main p {
  font-size: var(--text-md);
  color: var(--gray-700);
  line-height: 1.75;
  margin: 0 0 16px;
}
.docs-main strong { color: var(--brand-900); font-weight: 600; }
.docs-main em { color: var(--brand-700); font-style: normal; font-weight: 500; }
.docs-main code {
  font-family: var(--font-mono);
  font-size: 0.92em;
  background: var(--gray-100);
  color: var(--brand-700);
  padding: 1px 6px;
  border-radius: var(--radius-sm);
}
.docs-main a {
  color: var(--brand-500);
  font-weight: 500;
  border-bottom: 1px solid var(--brand-200);
}
.docs-main a:hover { color: var(--brand-700); border-color: var(--brand-500); }

.docs-main ol, .docs-main ul {
  margin: 0 0 16px;
  padding-left: 24px;
}
.docs-main li {
  font-size: var(--text-md);
  color: var(--gray-700);
  line-height: 1.75;
  margin-bottom: 6px;
}
.docs-main ol li::marker {
  color: var(--brand-500);
  font-weight: 600;
}

/* Rendered markdown tables */
.docs-main table {
  width: 100%;
  border-collapse: collapse;
  margin: 16px 0 24px;
  font-size: var(--text-sm);
  background: var(--gray-0);
  border: 1px solid var(--border-default);
  border-radius: var(--radius-md);
  overflow: hidden;
}
.docs-main th, .docs-main td {
  padding: 10px 14px;
  text-align: left;
  border-bottom: 1px solid var(--border-subtle);
  line-height: 1.55;
}
.docs-main thead th {
  background: var(--gray-50);
  font-size: var(--text-xs);
  font-weight: 600;
  color: var(--gray-700);
  letter-spacing: 0.02em;
  text-transform: uppercase;
  border-bottom: 1px solid var(--border-default);
}
.docs-main tbody tr:last-child td { border-bottom: none; }
.docs-main tbody tr:hover { background: var(--gray-25); }

/* Rendered markdown code blocks */
.docs-main pre {
  background: var(--gray-25);
  border: 1px solid var(--border-default);
  border-radius: var(--radius-md);
  padding: 16px 20px;
  overflow-x: auto;
  margin: 16px 0 24px;
}
.docs-main pre code {
  background: none;
  color: var(--gray-800);
  padding: 0;
  font-size: var(--text-sm);
  line-height: 1.6;
  border-radius: 0;
}

/* Blockquote → callout-style */
.docs-main blockquote {
  background: var(--info-50);
  border-left: 3px solid var(--info-500);
  border-radius: var(--radius-md);
  padding: 14px 18px;
  margin: 16px 0 24px;
  color: var(--info-700);
}
.docs-main blockquote p { color: var(--gray-700); margin: 0; font-size: var(--text-sm); line-height: 1.6; }

/* ====================================================================
   RIGHT RAIL
   ==================================================================== */
.docs-rail {
  position: sticky;
  top: 132px;
  font-size: var(--text-sm);
}
.rail-title {
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.06em;
  color: var(--fg-subtle);
  text-transform: uppercase;
  margin: 0 0 12px;
}
.rail-list { display: flex; flex-direction: column; gap: 2px; list-style: none; padding: 0; margin: 0 0 24px; }
.rail-list a {
  display: block;
  padding: 5px 10px;
  border-radius: var(--radius-sm);
  color: var(--fg-muted);
  font-size: 13px;
  border-left: 2px solid transparent;
}
.rail-list a:hover { color: var(--brand-700); }
.rail-list a.active {
  color: var(--brand-700);
  border-left-color: var(--brand-500);
  font-weight: 500;
}
.rail-actions {
  padding-top: 16px;
  border-top: 1px solid var(--border-subtle);
  display: flex; flex-direction: column; gap: 6px;
}
.rail-action {
  display: flex; align-items: center; gap: 8px;
  padding: 6px 10px;
  font-size: 13px;
  color: var(--fg-muted);
  border-radius: var(--radius-sm);
  cursor: pointer;
  background: none;
  border: none;
  font-family: inherit;
  width: 100%;
  text-align: left;
}
.rail-action:hover { background: var(--gray-50); color: var(--brand-700); }
.rail-action .icon { width: 14px; height: 14px; }

/* ====================================================================
   FEEDBACK WIDGET
   ==================================================================== */
.docs-feedback {
  margin-top: 40px;
  padding: 24px;
  background: var(--gray-25);
  border-radius: var(--radius-lg);
  display: flex; align-items: center; justify-content: space-between;
}
.feedback-q { font-size: var(--text-md); color: var(--gray-800); }
.feedback-actions { display: flex; gap: 8px; }
.feedback-btn {
  display: inline-flex; align-items: center; gap: 6px;
  background: var(--gray-0);
  border: 1px solid var(--border-default);
  border-radius: var(--radius-md);
  padding: 6px 14px;
  font-size: var(--text-sm);
  color: var(--gray-700);
  cursor: pointer;
  font-family: inherit;
}
.feedback-btn:hover { border-color: var(--brand-500); color: var(--brand-700); }
.feedback-btn .icon { width: 14px; height: 14px; }

/* ====================================================================
   RESPONSIVE
   ==================================================================== */
@media (max-width: 1200px) {
  .docs-layout { grid-template-columns: 220px 1fr; gap: 32px; }
  .docs-rail { display: none; }
}
@media (max-width: 880px) {
  .docs-layout { grid-template-columns: 1fr; gap: 24px; padding: 16px; }
  .docs-toc { position: static; max-height: none; border: 1px solid var(--border-subtle); border-radius: var(--radius-md); padding: 16px; margin-bottom: 8px; }
  .docs-subnav-inner { padding: 10px 16px; }
  .docs-search { max-width: none; }
}