/* ============================================================
   QuantX Documentation Page Styles
   Unified layout for Overview / QMT / PTrade tabs
   ============================================================ */

/* ---- Body offset for fixed header + subnav ---- */
body.docs-page {
  padding-top: var(--docs-total-header); /* 112px = 64px header + 48px subnav */
  font-family: var(--font-sans);
  font-size: 1rem;
  color: var(--color-text);
  --docs-directory-width: 15rem;       /* 240px sidebar */
  --docs-reading-width: 64rem;         /* 1024px: fill the working column on wide desktop */
  --docs-toc-width: 13rem;             /* 208px TOC */
}

.docs-breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.45rem;
  margin-bottom: 1.5rem;
  color: var(--color-text-tertiary);
  font-size: 0.8125rem;
}
.docs-breadcrumb a {
  color: inherit;
  text-decoration: none;
}
.docs-breadcrumb a:hover { color: var(--color-text-emphasis); }

.docs-directory-list {
  display: grid;
  margin-top: 2.5rem;
  border-top: 1px solid var(--color-border-subtle);
}
.docs-directory-list > a {
  display: grid;
  grid-template-columns: minmax(9rem, 0.32fr) 1fr;
  gap: 1rem;
  padding: 1rem 0;
  border-bottom: 1px solid var(--color-border-subtle);
  color: inherit;
  text-decoration: none;
}
.docs-directory-list strong { color: var(--color-text-emphasis); }
.docs-directory-list span { color: var(--color-text-secondary); }

.docs-section-index {
  width: min(52rem, calc(100% - 2rem));
  margin: 0 auto;
  padding: 4rem 0 6rem;
}
.docs-section-index > header { max-width: 44rem; }
.docs-section-index > header h1 {
  margin: 0;
  color: var(--color-text-emphasis);
  font-size: 2.25rem;
  line-height: 1.2;
}
.docs-section-index > header p {
  margin: 1rem 0 0;
  color: var(--color-text-secondary);
  line-height: 1.75;
}
.docs-section-index__links {
  margin: 2.5rem 0 0;
  padding: 0;
  border-top: 1px solid var(--color-border-subtle);
  list-style: none;
}
.docs-section-index__links a {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 1.5rem;
  padding: 1rem 0;
  border-bottom: 1px solid var(--color-border-subtle);
  color: inherit;
  text-decoration: none;
}
.docs-section-index__links strong { color: var(--color-text-emphasis); }
.docs-section-index__links span {
  flex: 0 0 auto;
  color: var(--color-text-tertiary);
  font-size: 0.8125rem;
}

@media (max-width: 640px) {
  .docs-directory-list > a { grid-template-columns: 1fr; gap: 0.35rem; }
  .docs-section-index { padding-top: 2.5rem; }
  .docs-section-index__links a { align-items: flex-start; }
}

/* Keep the viewport width stable when a tab has a different document height. */
html {
  scrollbar-gutter: stable;
  scrollbar-width: thin;
  scrollbar-color: var(--color-border) var(--color-surface-secondary);
}

/* Match the restrained progress treatment used by resource rails. */
html::-webkit-scrollbar {
  width: 0.5rem;
}
html::-webkit-scrollbar-track {
  background: var(--color-surface-secondary);
}
html::-webkit-scrollbar-thumb {
  border: 2px solid var(--color-surface-secondary);
  border-radius: 999px;
  background: var(--color-border);
}

/* ============================================================
   Sub Navigation (48px context bar with tabs)
   ============================================================ */
.docs-subnav {
  position: fixed;
  top: var(--header-height);
  left: 0;
  right: 0;
  height: var(--subnav-height); /* 48px */
  z-index: 90;
  background: var(--color-surface-secondary);
  border-bottom: 1px solid var(--color-border-subtle);
  overflow-x: auto;
  scrollbar-width: none;
}
.docs-subnav::-webkit-scrollbar { display: none; }

/* In dark mode, the header, context navigation and document surface read as
   one continuous plane. Only the content boundary remains visible. */
[data-theme="dark"] .docs-page .quantx-header {
  border-bottom-color: transparent;
}
[data-theme="dark"] .docs-subnav {
  background: var(--color-surface);
  border-bottom-color: var(--color-border-subtle);
}

.docs-subnav__inner {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 2rem;
  height: 100%;
  padding-inline: var(--header-padding-mobile);
  white-space: nowrap;
}
@media (min-width: 768px) {
  .docs-subnav__inner { padding-inline: var(--header-padding-desktop); }
}

.docs-subnav__tab {
  position: relative;
  display: inline-flex;
  height: 100%;
  align-items: center;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--color-text-tertiary);
  text-decoration: none;
  padding: 0 0.125rem;
  transition: color var(--transition-duration-basic) var(--transition-ease-basic);
}
.docs-subnav__tab:hover {
  color: var(--color-text-emphasis);
}
.docs-subnav__tab.active {
  color: var(--color-text-emphasis);
  font-weight: 500;
}
.docs-subnav__tab::after {
  position: absolute;
  right: 0.125rem;
  bottom: 0;
  left: 0.125rem;
  height: 2px;
  border-radius: 999px 999px 0 0;
  background: var(--color-text-emphasis);
  content: "";
  opacity: 0;
  transition: opacity var(--transition-duration-basic) var(--transition-ease-basic);
}
.docs-subnav__tab.active::after {
  opacity: 1;
}

/* ============================================================
   Tab Content Switching
   ============================================================ */
.docs-tab-content { display: none; }
.docs-tab-content.active {
  display: block;
}

@media (prefers-reduced-motion: reduce) {
  .docs-subnav__tab,
  .docs-subnav__tab::after { transition: none; }
}

/* Navigation and reference rails share the same low-contrast glass material. */
.docs-subnav,
.docs-platform-sidebar {
  background: var(--color-glass-surface-strong);
  -webkit-backdrop-filter: blur(18px) saturate(1.06);
  backdrop-filter: blur(18px) saturate(1.06);
}
[data-theme="dark"] .docs-subnav { background: var(--color-glass-surface-strong); }

/* ============================================================
   Three-Column Platform Layout (shared by all tabs)
   Structure: .docs-platform-layout > sidebar + content-grid > main + TOC
   ============================================================ */
.docs-platform-layout {
  display: flex;
  min-height: calc(100vh - var(--docs-total-header));
}

/* ---- Left Sidebar ---- */
.docs-platform-sidebar {
  position: fixed;
  top: var(--docs-total-header);
  left: 0;
  width: var(--docs-directory-width); /* 240px */
  height: calc(100vh - var(--docs-total-header));
  overflow-y: auto;
  overflow-x: hidden;
  padding: 0.75rem 0.5rem 7rem 0; /* bottom space for fixed contact button */
  scrollbar-width: none;
  background: var(--color-surface);
  z-index: 40;
  box-sizing: border-box;
  overscroll-behavior: contain; /* prevent scroll propagation to main content */
}
.docs-platform-sidebar::-webkit-scrollbar { display: none; }

.docs-platform-sidebar__title {
  display: block;
  margin: 0;
  padding: 0.5rem 1rem 0.625rem;
  font-size: 0.875rem;
  font-weight: 500;
  line-height: 1.4;
  color: var(--color-text);
}

.docs-platform-sidebar__group {
  font-size: 0.875rem;
  font-weight: 650;
  letter-spacing: 0;
  text-transform: none;
  color: var(--color-text-emphasis);
  padding: 0.25rem 1rem;
  margin-top: 1.5rem;
  user-select: none;
  pointer-events: auto;
  border-top: none;
}
.docs-platform-sidebar__group > summary {
  display: flex;
  align-items: center;
  gap: .5rem;
  cursor: pointer;
  list-style: none;
  min-height: 2rem;
}
.docs-platform-sidebar__group > summary::-webkit-details-marker { display: none; }
.docs-platform-sidebar__group > summary::after {
  content: "⌄";
  margin-left: auto;
  color: var(--color-text-secondary);
  font-size: .8rem;
  transition: transform .18s ease;
}
.docs-platform-sidebar__group:not([open]) > summary::after { transform: rotate(-90deg); }
.docs-platform-sidebar__count {
  color: var(--color-text-secondary);
  font-size: .7rem;
  font-weight: 500;
}
.docs-platform-sidebar__group:first-of-type {
  margin-top: 1.25rem;
}

.docs-platform-sidebar__nav {
  display: flex;
  flex-direction: column;
  gap: 0;
}

.docs-platform-sidebar__primary {
  display: grid;
  gap: 0.125rem;
  padding: 0.25rem 0.75rem 6rem;
}
.docs-platform-sidebar__primary > .docs-platform-sidebar__item {
  min-height: 36px;
  margin: 0;
  padding: 0.5rem 0.75rem;
  border-radius: 0.45rem;
}
.docs-platform-sidebar__primary > .docs-platform-sidebar__subgroups {
  margin: 0.125rem 0 0.375rem 0.75rem;
  padding-left: 0.625rem;
}

.docs-platform-sidebar__item {
  display: flex;
  align-items: center;
  font-size: 0.875rem;
  line-height: 1.45;
  padding: 0.4375rem 1.75rem;
  border-radius: 0.5rem;
  color: var(--color-text);
  text-decoration: none;
  transition: all var(--transition-duration-basic) var(--transition-ease-basic);
  min-height: 38px;
  word-break: break-word;
  margin: 0.125rem 0;
}
.docs-platform-sidebar__item:hover {
  background: var(--color-background-primary-soft-alpha);
  color: var(--color-text-emphasis);
}
.docs-platform-sidebar__item.active {
  background: var(--color-background-primary-soft);
  color: var(--color-text-emphasis);
  font-weight: 500;
}
.docs-platform-sidebar__subgroups {
  display: grid;
  gap: .125rem;
  margin: .2rem 0 .75rem;
  padding-left: 1.25rem;
  border-left: 1px solid var(--color-border);
  min-width: 0;
}
.docs-platform-sidebar__subgroup {
  display: block;
  padding: .42rem .55rem;
  border-radius: .4rem;
  color: var(--color-text-secondary);
  text-decoration: none;
  min-width: 0;
  max-width: 100%;
  font-size: .8rem;
  line-height: 1.35;
}
.docs-platform-sidebar__subgroup:hover,
.docs-platform-sidebar__subgroup.active {
  background: var(--color-background-primary-soft);
  color: var(--color-text-emphasis);
}
.docs-platform-sidebar__subgroup.active { font-weight: 600; }
.docs-platform-subnav { display:none; margin:0 0 .5rem; padding-left:2.75rem; }
.docs-platform-sidebar:has(.docs-platform-sidebar__item[data-qmt-page="market"].active) .docs-platform-subnav { display:grid; gap:.125rem; }
.docs-platform-subnav__item { color:var(--color-text-secondary); font-size:.8125rem; line-height:1.55; text-decoration:none; }
.docs-platform-subnav__item:hover { color:var(--color-text-emphasis); text-decoration:underline; text-underline-offset:3px; }
.docs-api-status { display:inline-block; margin-left:.4rem; padding:.08rem .35rem; border-radius:999px; background:rgba(181,112,0,.14); color:#a86400; font-size:.6875rem; font-weight:600; line-height:1.35; vertical-align:middle; }
[data-theme="dark"] .docs-api-status { background:rgba(255,190,92,.14); color:#f3c36c; }

/* ---- Function finder: task-first navigation for long reference lists ---- */
.docs-function-finder {
  margin: 1.75rem 0 2rem;
  padding: 1rem 0;
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
}
.docs-function-finder__search {
  display: grid;
  grid-template-columns: auto minmax(14rem, 1fr) auto;
  align-items: center;
  gap: 0.75rem;
}
.docs-function-finder__search label,
.docs-function-finder__common > strong {
  font-size: 0.8125rem;
  font-weight: 650;
  color: var(--color-text-emphasis);
}
.docs-function-finder__search input {
  width: 100%;
  min-height: 2.5rem;
  padding: 0.5rem 0.75rem;
  border: 1px solid var(--color-border);
  border-radius: 0.5rem;
  outline: none;
  background: var(--color-surface-secondary);
  color: var(--color-text-emphasis);
  font: inherit;
  font-size: 0.875rem;
  transition: border-color 180ms ease, background-color 180ms ease;
}
.docs-function-finder__search input::placeholder { color: var(--color-text-secondary); }
.docs-function-finder__search input:focus-visible {
  border-color: var(--color-text-emphasis);
  background: var(--color-surface);
}
.docs-function-finder__search > span {
  min-width: 4.5rem;
  text-align: right;
  font-size: 0.75rem;
  color: var(--color-text-secondary);
}
.docs-function-finder__groups {
  display: flex;
  flex-wrap: wrap;
  gap: 0.375rem;
  margin-top: 0.875rem;
}
.docs-article .docs-function-finder__groups a {
  padding: 0.3rem 0.55rem;
  border-radius: 999px;
  background: var(--color-background-primary-soft-alpha);
  color: var(--color-text-secondary);
  font-size: 0.75rem;
  text-decoration: none;
}
.docs-article .docs-function-finder__groups a:hover,
.docs-article .docs-function-finder__groups a:focus-visible {
  color: var(--color-text-emphasis);
  background: var(--color-background-primary-soft);
}
.docs-function-finder__common {
  display: grid;
  grid-template-columns: 5rem minmax(0, 1fr);
  gap: 0.75rem;
  align-items: start;
  margin-top: 1rem;
}
.docs-function-finder__common > div {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
}
.docs-article .docs-function-finder__common a {
  display: flex;
  min-width: 0;
  align-items: baseline;
  justify-content: space-between;
  gap: 0.75rem;
  padding: 0.4rem 0;
  border-bottom: 1px solid var(--color-border-subtle);
  color: var(--color-text-secondary);
  font-size: 0.75rem;
  text-decoration: none;
}
.docs-function-finder__common a:hover span { color: var(--color-text-emphasis); }
.docs-function-finder__common a span {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.docs-function-finder__common a code { flex: none; }
.docs-function-finder__empty,
.docs-function-finder__no-results {
  font-size: 0.8125rem;
  color: var(--color-text-secondary);
}
.docs-function-finder__no-results { margin: 1rem 0 0; }

.docs-article:has([data-function-finder]) table { table-layout: fixed; }
.docs-article:has([data-function-finder]) th:nth-child(1) { width: 38%; }
.docs-article:has([data-function-finder]) th:nth-child(2) { width: 32%; }
.docs-article:has([data-function-finder]) th:nth-child(3) { width: 14%; }
.docs-article:has([data-function-finder]) th:nth-child(4) { width: 16%; }
.docs-article:has([data-function-finder]) td code { overflow-wrap: anywhere; }

@media (max-width: 767px) {
  .docs-function-finder__search { grid-template-columns: 1fr auto; }
  .docs-function-finder__search label { grid-column: 1 / -1; }
  .docs-function-finder__common { grid-template-columns: 1fr; }
  .docs-function-finder__common > div { grid-template-columns: 1fr; }
}

/* ---- Content + TOC Grid ---- */
.docs-platform-content-grid {
  flex: 1;
  min-width: 0;
  margin-left: var(--docs-directory-width); /* 240px */
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 0;
}

/* 1024px+: add right TOC column */
@media (min-width: 1024px) {
  .docs-platform-content-grid {
    grid-template-columns: minmax(0, 1fr) var(--docs-toc-width);
    gap: 2rem;
    padding-right: 0;
  }
}

/* 1280px+: widen gap */
@media (min-width: 1280px) {
  .docs-platform-content-grid {
    grid-template-columns: minmax(0, 1fr) var(--docs-toc-width);
    gap: 2.5rem;
    padding-right: 1.5rem;
  }
}

/* 1440px+: max gap */
@media (min-width: 1440px) {
  .docs-platform-content-grid {
    gap: 3rem;
  }
}

/* ---- Middle Content Area ---- */
.docs-platform-main {
  min-width: 0;
  max-width: none;
  padding: 2rem 1.5rem 4rem;
  overflow-anchor: none;
  overflow: visible;
}
@media (min-width: 768px) {
  .docs-platform-main { padding: 2.5rem 2.5rem 4rem; }
}
@media (min-width: 1280px) {
  .docs-platform-main { padding: 2.5rem 2.5rem 5rem; }
}

/* ---- Article Container ---- */
.docs-platform-main .docs-article {
  width: 100%;
  max-width: var(--docs-reading-width);
  margin: 0;
  font-family: var(--font-sans);
  font-size: 1rem;
  line-height: 1.75;
}

/* Article switching (shared by overview, QMT, PTrade) */
.docs-platform-main .docs-article[data-overview-content],
.docs-platform-main .docs-article[data-qmt-content],
.docs-platform-main .docs-article[data-ptrade-content] { display: none; }

.docs-platform-main .docs-article[data-overview-content].active,
.docs-platform-main .docs-article[data-qmt-content].active,
.docs-platform-main .docs-article[data-ptrade-content].active {
  display: block;
  animation: articleFadeIn 0.15s ease;
}
@keyframes articleFadeIn {
  from { opacity: 0; }
  to   { opacity: 1; }
}

/* ============================================================
   Article Typography
   ============================================================ */
.docs-article h1 {
  scroll-margin-top: 7.5rem;
  margin: 0 0 0.625rem;
  font-size: 2rem;
  font-weight: 700;
  line-height: 1.25;
  letter-spacing: -0.025em;
  color: var(--color-text-emphasis);
}

.docs-article p {
  margin-block: 0.875rem;
  line-height: 1.75;
  color: var(--color-text);
}

.docs-article h2 {
  scroll-margin-top: 7.5rem;
  margin: 3rem 0 0.625rem;
  padding: 0;
  border-top: 0;
  font-size: 1.375rem;
  font-weight: 700;
  line-height: 1.35;
  letter-spacing: -0.015em;
  color: var(--color-text-emphasis);
}
.docs-article h2:first-of-type { margin-top: 2.5rem; }

.docs-article h3 {
  scroll-margin-top: 7.5rem;
  margin: 2rem 0 0.5rem;
  font-size: 1.125rem;
  font-weight: 650;
  line-height: 1.45;
  color: var(--color-text-emphasis);
}

.docs-article h4 {
  scroll-margin-top: 7.5rem;
  margin: 1.5rem 0 0.5rem;
  font-size: 1rem;
  font-weight: 600;
  color: var(--color-text-emphasis);
}

.docs-article li {
  margin-block: 0.375rem;
  line-height: 1.75;
  color: var(--color-text);
}

.docs-article strong { font-weight: 500; }

.docs-article a {
  color: var(--color-text-emphasis);
  text-decoration: underline;
  text-underline-offset: 2px;
  text-decoration-color: var(--gray-300);
  transition: text-decoration-color var(--transition-duration-basic) var(--transition-ease-basic);
}
.docs-article a:hover { text-decoration-color: var(--color-text-emphasis); }

.docs-article ul {
  margin-block: 0.75rem;
  padding-left: 1.25rem;
  list-style: disc;
}
.docs-article ol {
  margin-block: 0.75rem;
  padding-left: 1.25rem;
  list-style: decimal;
}

.docs-article code:not(pre code) {
  border-radius: var(--radius-sm);
  background: var(--color-background-primary-soft-alpha);
  padding: 0.125rem 0.375rem;
  font-family: var(--font-mono);
  font-size: 0.875em;
  color: var(--color-text-emphasis);
}

.docs-article img {
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border);
  max-width: 100%;
  height: auto;
}

.docs-official-figure {
  width: 100%;
  margin: 1.25rem 0 1.75rem;
}

.docs-official-figure img {
  display: block;
  width: auto;
  max-width: 100%;
  height: auto;
  margin: 0 auto;
  background: var(--color-background-primary);
  object-fit: contain;
}

.docs-official-figure figcaption {
  margin-top: 0.5rem;
  color: var(--color-text-secondary);
  font-size: 0.8125rem;
  line-height: 1.5;
  text-align: center;
}

.docs-official-gallery {
  display: grid;
  gap: 1rem;
  margin-block: 1.5rem 2rem;
}

.docs-official-gallery figure {
  margin: 0;
}

.docs-official-gallery img {
  display: block;
  height: auto;
  background: var(--color-background-primary);
}

.docs-official-gallery figcaption {
  margin-top: 0.5rem;
  color: var(--color-text-secondary);
  font-size: 0.8125rem;
  line-height: 1.5;
}

.docs-article blockquote {
  border-left: 4px solid var(--gray-200);
  font-style: normal;
  margin-block: 1rem;
  padding-left: 1rem;
  color: var(--color-text-secondary);
}

/* ============================================================
   Callout Box
   ============================================================ */
.docs-callout {
  background: var(--color-surface-secondary);
  border-radius: var(--radius-lg);
  padding: 1rem;
  border-left: 3px solid var(--gray-300);
  margin-block: 1rem;
  font-size: 0.9375rem;
  color: var(--color-text);
}
.docs-callout strong {
  color: var(--color-text-emphasis);
  font-weight: 500;
}

/* Editorial guidance: visually distinct from sourced documentation facts. */
.docs-article p:has(> .docs-small-tip__label) {
  margin-block: 1rem;
  padding: 0.75rem 0.875rem;
  border-left: 3px solid #5e8fd8;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  background: rgba(94, 143, 216, 0.08);
  color: var(--color-text-secondary);
  font-size: 0.9375rem;
}
.docs-small-tip__label {
  display: inline-flex;
  align-items: center;
  margin-right: 0.5rem;
  color: #356eae;
  font-size: 0.75rem;
  font-weight: 650;
  letter-spacing: 0.04em;
  white-space: nowrap;
}
[data-theme="dark"] .docs-article p:has(> .docs-small-tip__label) {
  border-left-color: #78a9e8;
  background: rgba(92, 143, 210, 0.12);
}
[data-theme="dark"] .docs-small-tip__label { color: #9fc6f5; }

/* ============================================================
   Code Block
   ============================================================ */
.docs-code-block {
  background: var(--gray-950);
  border-radius: var(--radius-md);
  padding: 1rem;
  overflow-x: auto;
  margin-block: 1rem;
  border: 1px solid var(--gray-850);
  scrollbar-width: none;
  position: relative;
}
.docs-code-block::-webkit-scrollbar { display: none; }
.docs-code-block code {
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  line-height: 1.6;
  color: #e6e6e6;
  background: transparent;
  padding: 0;
}
.docs-code-block .c-key { color: #79c0ff; }
.docs-code-block .c-str { color: #a5d6ff; }
.docs-code-block .c-com { color: #8b949e; }
.docs-code-block .c-fn  { color: #d2a8ff; }
.docs-code-block .c-var { color: #ffa657; }

.docs-code-copy {
  position: absolute;
  top: 0.5rem;
  right: 0.5rem;
  padding: 0.25rem 0.5rem;
  border-radius: var(--radius-sm);
  background: var(--gray-800);
  color: var(--gray-300);
  border: 1px solid var(--gray-700);
  font-size: 0.6875rem;
  cursor: pointer;
  opacity: 0;
  transition: opacity var(--transition-duration-basic) var(--transition-ease-basic);
}
.docs-code-block:hover .docs-code-copy { opacity: 1; }
.docs-code-copy:hover { background: var(--gray-700); color: var(--gray-100); }
.docs-code-copy.copied { color: #27c93f; }

/* ============================================================
   Link Button
   ============================================================ */
.docs-link-button {
  display: inline-flex;
  align-items: center;
  gap: 0.375rem;
  padding: 0.5rem 0.875rem;
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border);
  background: var(--color-surface);
  color: var(--color-text-emphasis);
  font-size: 0.875rem;
  font-weight: 500;
  text-decoration: none;
  transition: all var(--transition-duration-basic) var(--transition-ease-basic);
}
.docs-link-button:hover {
  background: var(--color-surface-secondary);
  border-color: var(--gray-200);
}

/* ============================================================
   Right TOC (Table of Contents)
   ============================================================ */
.docs-platform-content-grid .docs-toc {
  position: sticky;
  top: calc(var(--docs-total-header) + 1.5rem);
  right: 0;
  height: fit-content;
  max-height: calc(100vh - var(--docs-total-header) - 3rem);
  overflow-y: auto;
  padding: 0 1rem 0 0;
  display: none;
  scrollbar-width: none;
  width: auto;
  max-width: none;
}
.docs-platform-content-grid .docs-toc::-webkit-scrollbar { display: none; }

@media (min-width: 1024px) {
  .docs-platform-content-grid .docs-toc {
    display: block;
  }
}

/* Hide TOC on 1024-1279px range */
@media (min-width: 1024px) and (max-width: 1279px) {
  .docs-platform-content-grid {
    grid-template-columns: minmax(0, 1fr);
    gap: 0;
    padding: 0;
  }
  .docs-platform-content-grid .docs-toc { display: none !important; }
}

.docs-toc__title {
  font-size: 0.6875rem;
  font-weight: 500;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--color-text-tertiary);
  margin-bottom: 0.75rem;
  padding: 0;
}

.docs-toc__list {
  list-style: none;
  padding: 0;
  margin: 0;
  border-left: 1px solid var(--color-border-subtle);
  position: relative;
}

.docs-toc__item { display: block; }

/* H2: top-level, 14px, no indent */
.docs-toc__link {
  display: block;
  font-size: 0.875rem;
  font-weight: 400;
  color: var(--color-text-tertiary);
  text-decoration: none;
  padding: 0.375rem 0 0.375rem 0.875rem;
  margin-left: -1px;
  border-left: 2px solid transparent;
  transition: all var(--transition-duration-basic) var(--transition-ease-basic);
  line-height: 1.4;
}
.docs-toc__link:hover {
  color: var(--color-text-secondary);
  border-left-color: var(--color-text-tertiary);
}
.docs-toc__link.active {
  color: var(--color-text-emphasis);
  font-weight: 700;
  border-left-color: var(--color-text-emphasis);
  border-left-width: 3px;
  background: var(--color-background-primary-soft-alpha);
}

/* H3: second-level, 12px, 1.75rem indent */
.docs-toc__link[data-level="3"] {
  padding-left: 1.75rem;
  font-size: 0.75rem;
  font-weight: 400;
  color: var(--color-text-tertiary);
  line-height: 1.4;
  position: relative;
  opacity: 0.8;
}
.docs-toc__link[data-level="3"]::before {
  content: "";
  position: absolute;
  left: 1rem;
  top: 50%;
  transform: translateY(-50%);
  width: 3px;
  height: 3px;
  border-radius: 50%;
  background: var(--color-text-tertiary);
  opacity: 0.4;
  transition: opacity var(--transition-duration-basic) var(--transition-ease-basic);
}
.docs-toc__link[data-level="3"]:hover::before,
.docs-toc__link[data-level="3"].active::before { opacity: 0.8; }
.docs-toc__link[data-level="3"].active {
  font-weight: 500;
  color: var(--color-text);
  border-left-color: var(--color-text-secondary);
  opacity: 1;
}
.docs-toc__link[data-level="3"]:hover {
  color: var(--color-text-secondary);
  border-left-color: var(--color-border-subtle);
}

/* H4/H5: third-level, 12px, 2.75rem indent */
.docs-toc__link[data-level="4"],
.docs-toc__link[data-level="5"] {
  padding-left: 2.75rem;
  font-size: 0.75rem;
  font-weight: 400;
  color: var(--color-text-tertiary);
  line-height: 1.4;
  position: relative;
}
.docs-toc__link[data-level="4"]::before,
.docs-toc__link[data-level="5"]::before {
  content: "";
  position: absolute;
  left: 2rem;
  top: 50%;
  transform: translateY(-50%);
  width: 2px;
  height: 2px;
  border-radius: 50%;
  background: var(--color-text-tertiary);
  opacity: 0.3;
  transition: opacity var(--transition-duration-basic) var(--transition-ease-basic);
}
.docs-toc__link[data-level="4"]:hover::before,
.docs-toc__link[data-level="4"].active::before,
.docs-toc__link[data-level="5"]:hover::before,
.docs-toc__link[data-level="5"].active::before { opacity: 0.7; }
.docs-toc__link[data-level="4"].active,
.docs-toc__link[data-level="5"].active {
  font-weight: 400;
  color: var(--color-text-tertiary);
  border-left-color: var(--color-text-tertiary);
  opacity: 1;
}
.docs-toc__link[data-level="4"]:hover,
.docs-toc__link[data-level="5"]:hover {
  color: var(--color-text-secondary);
  border-left-color: var(--color-border-subtle);
}

/* Parent-active: secondary emphasis when child H3/H4 is active */
.docs-toc__link.parent-active {
  color: var(--color-text-emphasis);
  font-weight: 600;
  border-left-color: var(--color-text-secondary);
}

/* TOC empty state */
.docs-toc__empty {
  font-size: 0.8125rem;
  color: var(--color-text-tertiary);
  padding: 0.25rem 0.875rem;
  list-style: none;
}

/* H2 group spacing in TOC */
.docs-toc__item--h2 {
  margin-top: 0.25rem;
  padding-top: 0.25rem;
  border-top: none;
}
.docs-toc__item--h2:first-child {
  margin-top: 0;
  padding-top: 0;
  border-top: none;
}

/* Collapsed group: hide children */
.docs-toc__item--collapsed .docs-toc__link[data-level="3"],
.docs-toc__item--collapsed .docs-toc__link[data-level="4"],
.docs-toc__item--collapsed .docs-toc__link[data-level="5"] {
  display: none;
}

/* ============================================================
   Overview Entry Items (list-style navigation cards)
   ============================================================ */
.docs-overview-entries { padding-top: 0; }

.docs-entries-list {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  margin-top: 1.25rem;
}

.docs-entry-item {
  display: flex;
  align-items: center;
  padding: 1rem 1.25rem;
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border-subtle);
  background: var(--color-surface);
  color: var(--color-text-emphasis);
  text-decoration: none;
  transition: all var(--transition-duration-basic) var(--transition-ease-basic);
  cursor: pointer;
}
.docs-entry-item:hover {
  border-color: var(--color-border);
  background: var(--color-surface-secondary);
}

.docs-entry-item__icon {
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 2.5rem;
  height: 2.5rem;
  border-radius: var(--radius-md);
  background: var(--color-background-primary-soft-alpha);
  color: var(--color-text-secondary);
  transition: color var(--transition-duration-basic) var(--transition-ease-basic);
}
.docs-entry-item:hover .docs-entry-item__icon { color: var(--color-text-emphasis); }
.docs-entry-item__icon svg { width: 1.25rem; height: 1.25rem; }

.docs-entry-item__text {
  flex: 1;
  margin: 0 1rem;
  min-width: 0;
}

.docs-entry-item__title {
  display: block;
  font-size: 0.9375rem;
  font-weight: 600;
  line-height: 1.35;
  letter-spacing: -0.01em;
}

.docs-entry-item__desc {
  display: block;
  margin-top: 0.25rem;
  font-size: 0.8125rem;
  line-height: 1.5;
  color: var(--color-text-secondary);
}

.docs-entry-item__arrow {
  flex-shrink: 0;
  width: 1rem;
  height: 1rem;
  color: var(--color-text-tertiary);
  transition: transform 0.2s ease-out, color var(--transition-duration-basic) var(--transition-ease-basic);
}
.docs-entry-item:hover .docs-entry-item__arrow {
  transform: translateX(2px);
  color: var(--color-text-emphasis);
}

.docs-entry-item.disabled {
  opacity: 0.5;
  cursor: not-allowed;
  pointer-events: none;
}

/* ============================================================
   Resource Link (bottom of articles)
   ============================================================ */
.docs-resource-link {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem 1rem;
  margin-top: 3rem;
  padding: 1rem 1.125rem;
  border-radius: 0.625rem;
  background: var(--color-surface-secondary);
  color: var(--color-text-secondary);
  font-size: 0.875rem;
}
.docs-resource-link a {
  color: var(--color-text-emphasis);
  font-weight: 500;
  text-decoration: none;
}
.docs-resource-link a:hover {
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* ============================================================
   Platform Switcher (legacy, for backward compatibility)
   ============================================================ */
.platform-switcher {
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
  padding: 0.25rem;
  border-radius: var(--radius-full);
  border: 1px solid var(--color-border);
  background: var(--color-surface-secondary);
  margin: 1rem 0 1.5rem;
}
.platform-switcher__btn {
  display: inline-flex;
  align-items: center;
  gap: 0.375rem;
  padding: 0.375rem 0.875rem;
  border-radius: var(--radius-full);
  border: none;
  background: transparent;
  color: var(--color-text-secondary);
  font-size: 0.8125rem;
  font-weight: 500;
  cursor: pointer;
  transition: background-color var(--transition-duration-basic) var(--transition-ease-basic),
              color var(--transition-duration-basic) var(--transition-ease-basic);
  white-space: nowrap;
}
.platform-switcher__btn:hover { color: var(--color-text-emphasis); }
.platform-switcher__btn.active {
  background: var(--color-surface);
  color: var(--color-text-emphasis);
  box-shadow: 0 1px 2px rgba(0,0,0,.08);
}
.platform-switcher__icon {
  width: 14px;
  height: 14px;
  border-radius: 3px;
  display: inline-block;
  flex-shrink: 0;
}
.platform-switcher__icon--qmt { background: #1677ff; }
.platform-switcher__icon--ptrade { background: #52c41a; }

.platform-content { display: none; }
.platform-content.active { display: block; }

/* ============================================================
   Floating Ask AI Button
   ============================================================ */
.docs-ask-ai {
  position: fixed;
  bottom: 1.5rem;
  right: 1.5rem;
  z-index: 80;
  height: 2.5rem;
  padding: 0 1rem;
  border-radius: var(--radius-full);
  background: var(--color-background-primary-solid);
  color: #fff;
  font-size: 0.875rem;
  font-weight: 500;
  display: inline-flex;
  align-items: center;
  gap: 0.375rem;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
  border: none;
  cursor: pointer;
  transition: background var(--transition-duration-basic) var(--transition-ease-basic),
              transform var(--transition-duration-basic) var(--transition-ease-basic);
  font-family: var(--font-sans);
}
[data-theme="dark"] .docs-ask-ai { color: var(--gray-1000); }
.docs-ask-ai:hover { background: var(--color-background-primary-solid-hover); }
.docs-ask-ai:active { transform: scale(0.97); }

/* ============================================================
   Mobile Sidebar Backdrop
   ============================================================ */
.docs-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.3);
  z-index: 94;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--transition-duration-basic) var(--transition-ease-basic);
}
.docs-backdrop.show {
  opacity: 1;
  pointer-events: auto;
}
@media (min-width: 1024px) {
  .docs-backdrop { display: none; }
}

/* ============================================================
   Mobile Responsive
   ============================================================ */
@media (max-width: 1023px) {
  .docs-platform-sidebar {
    display: none;
  }
  .docs-platform-sidebar.open {
    display: block;
    z-index: 100;
    box-shadow: 0 0 0 1px var(--color-border-subtle);
    animation: sidebarSlideIn 0.2s ease-out;
  }
  @keyframes sidebarSlideIn {
    from { transform: translateX(-100%); }
    to   { transform: translateX(0); }
  }
  .docs-platform-content-grid {
    margin-left: 0;
  }
  .docs-platform-main {
    padding: 2rem 1.5rem 4rem;
  }
}

/* ============================================================
   Dark Theme TOC Adjustments
   ============================================================ */
[data-theme="dark"] .docs-toc__title { color: var(--gray-350); }
[data-theme="dark"] .docs-toc__list { border-left-color: rgba(255, 255, 255, 0.18); }
[data-theme="dark"] .docs-toc__link { color: var(--gray-300); }
[data-theme="dark"] .docs-toc__link[data-level="3"] { color: var(--gray-350); opacity: 1; }
[data-theme="dark"] .docs-toc__link[data-level="4"],
[data-theme="dark"] .docs-toc__link[data-level="5"] { color: var(--gray-400); }
[data-theme="dark"] .docs-toc__link[data-level="3"]::before,
[data-theme="dark"] .docs-toc__link[data-level="4"]::before,
[data-theme="dark"] .docs-toc__link[data-level="5"]::before {
  background: var(--gray-350);
  opacity: 0.7;
}
[data-theme="dark"] .docs-toc__link:hover,
[data-theme="dark"] .docs-toc__link[data-level="3"]:hover,
[data-theme="dark"] .docs-toc__link[data-level="4"]:hover,
[data-theme="dark"] .docs-toc__link[data-level="5"]:hover { color: var(--gray-0); }
[data-theme="dark"] .docs-toc__link.active,
[data-theme="dark"] .docs-toc__link.parent-active {
  color: var(--gray-0);
  border-left-color: var(--gray-0);
}

/* Keep document rails legible while giving them the shared glass material. */
.docs-platform-sidebar {
  background:var(--color-glass-surface-strong);
  border-right:1px solid var(--color-glass-border);
  -webkit-backdrop-filter:blur(18px) saturate(1.06);
  backdrop-filter:blur(18px) saturate(1.06);
}
[data-theme="dark"] .docs-platform-sidebar { background:var(--color-glass-surface-strong); }

/* Keep documentation surfaces in the same restrained glass system as the shell. */
.docs-callout,
.docs-api-card,
.docs-platform-switcher,
.docs-article table {
  border-color:var(--color-glass-border);
  background:var(--color-glass-surface);
  -webkit-backdrop-filter:blur(14px) saturate(1.06);
  backdrop-filter:blur(14px) saturate(1.06);
}
[data-theme="dark"] .docs-callout,
[data-theme="dark"] .docs-api-card,
[data-theme="dark"] .docs-platform-switcher,
[data-theme="dark"] .docs-article table { background:rgba(7,7,8,.68); }

/* ---- Anchor contact button to sidebar bottom on docs pages (desktop) ---- */
/* The hidden panel (visibility:hidden) still takes flex space, so we absolute-position
   it and let pointer-events pass through the container except on the trigger itself. */
@media (min-width: 1024px) {
  body.docs-page .qx-contact {
    left: 0;
    bottom: 0;
    width: var(--docs-directory-width);
    padding: 0.5rem 0.75rem 0.75rem;
    box-sizing: border-box;
    align-items: center;
    pointer-events: none;
  }
  body.docs-page .qx-contact__trigger {
    width: 100%;
    justify-content: center;
    pointer-events: auto;
  }
  body.docs-page .qx-contact__panel {
    position: absolute;
    bottom: 100%;
    left: 0.5rem;
    right: 0.5rem;
    width: auto;
  }
  body.docs-page .qx-contact.is-open .qx-contact__panel {
    pointer-events: auto;
  }
}