:root {
  color-scheme: light;
  --bg: #ffffff;
  --surface: #f6f7f9;
  --border: #e6e8ee;
  --text: #1a1d24;
  --muted: #5c6570;
  --accent: #2563eb;
  --accent-wash: #eff4ff;
  --code-inline: #b42318;
  --code-inline-bg: #f3f4f6;
  --search-mark: #dc2626;
  --warning: #b45309;
  --warning-bg: #fff7ed;
  --tip: #047857;
  --tip-bg: #ecfdf5;
  --note: #1d4ed8;
  --note-bg: #eff6ff;
  --header: 64px;
  --sidebar: 272px;
  --toc: 240px;
  --font: "Instrument Sans", "Segoe UI", sans-serif;
  --mono: "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, monospace;
  --shadow: 0 16px 50px rgba(16, 24, 40, 0.16);
}

html.dark {
  color-scheme: dark;
  --bg: #0b0d10;
  --surface: #14181f;
  --border: #2a303b;
  --text: #eef1f6;
  --muted: #8b93a7;
  --accent: #60a5fa;
  --accent-wash: rgba(96, 165, 250, 0.12);
  --code-inline: #f87171;
  --code-inline-bg: #1c222c;
  --search-mark: #f87171;
  --warning: #fbbf24;
  --warning-bg: rgba(251, 191, 36, 0.1);
  --tip: #34d399;
  --tip-bg: rgba(52, 211, 153, 0.1);
  --note: #93c5fd;
  --note-bg: rgba(147, 197, 253, 0.1);
  --shadow: 0 16px 50px rgba(0, 0, 0, 0.45);
}

* { box-sizing: border-box; }
html, body { margin: 0; }
body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.7;
}
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }
.skip {
  position: absolute;
  left: 1rem;
  top: -4rem;
  background: var(--accent);
  color: white;
  padding: 0.5rem 0.75rem;
  z-index: 80;
}
.skip:focus { top: 0.5rem; }

.header {
  position: sticky;
  top: 0;
  z-index: 40;
  height: var(--header);
  display: grid;
  grid-template-columns: var(--sidebar) minmax(0, 1fr) 280px;
  align-items: center;
  gap: 1rem;
  padding: 0 1rem 0 1.25rem;
  background: var(--bg);
  border-bottom: 1px solid var(--border);
}
.header-start, .header-end { display: flex; align-items: center; gap: 0.35rem; min-width: 0; }
.header-end { justify-content: flex-end; }
.logo {
  color: var(--accent);
  font-weight: 700;
  font-size: 1.2rem;
  letter-spacing: -0.04em;
  text-decoration: none;
}
.logo:hover { text-decoration: none; color: var(--accent); }
.icon-button, .version-button, .search-trigger, .tab, .copy {
  font: inherit;
  color: var(--text);
  background: transparent;
  border: 1px solid transparent;
  border-radius: 8px;
  min-height: 44px;
  min-width: 44px;
  padding: 0 0.75rem;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
}
.theme-button {
  padding: 0;
  width: 44px;
}
.icon-button:hover, .version-button:hover, .search-trigger:hover, .tab:hover, .copy:hover {
  background: var(--surface);
}
.icon-button:focus-visible, .version-button:focus-visible, .search-trigger:focus-visible,
.tab:focus-visible, .copy:focus-visible, .side-link:focus-visible, .search-hit:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}
  .menu-button, .search-icon { display: none; }
.search-trigger {
  justify-self: center;
  width: min(28rem, 100%);
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-color: var(--border);
  color: var(--muted);
  background: var(--surface);
}
.search-trigger kbd {
  font-family: var(--mono);
  font-size: 0.75rem;
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 0.1rem 0.35rem;
}
.version { position: relative; }
.version-menu {
  position: absolute;
  top: calc(100% + 0.35rem);
  left: 0;
  min-width: 10rem;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 10px;
  box-shadow: var(--shadow);
  padding: 0.35rem;
  z-index: 50;
}
.version-menu a {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  color: var(--text);
  text-decoration: none;
  padding: 0.55rem 0.7rem;
  border-radius: 8px;
}
.version-menu a:hover { background: var(--surface); }
.latest { color: var(--accent); font-size: 0.75rem; }

.layout {
  display: grid;
  grid-template-columns: var(--sidebar) minmax(0, 1fr) var(--toc);
  align-items: start;
}
.sidebar {
  position: sticky;
  top: var(--header);
  height: calc(100vh - var(--header));
  overflow: auto;
  padding: 1.5rem 0.85rem 3rem 0.35rem;
}
.side-label, .toc-label {
  margin: 0;
  padding: 0.35rem 0.85rem;
  font-size: 0.84rem;
  font-weight: 650;
  color: var(--text);
  list-style: none;
  cursor: pointer;
  user-select: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem;
  border-radius: 8px;
}
.side-label::-webkit-details-marker { display: none; }
.side-label::after {
  content: "";
  width: 0.4rem;
  height: 0.4rem;
  border-right: 2px solid var(--muted);
  border-bottom: 2px solid var(--muted);
  transform: rotate(-45deg);
  transition: transform 0.15s ease;
  flex: none;
}
.side-group[open] > .side-label::after {
  transform: rotate(45deg);
}
.side-label:hover { background: var(--surface); }
.toc-label {
  padding: 0;
  font-size: 0.84rem;
  font-weight: 600;
  color: var(--muted);
  cursor: default;
  display: block;
}
.toc-label::after { display: none; }
.callout-label {
  margin: 0;
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--muted);
}
.side-group + .side-group { margin-top: 0.35rem; }
.side-links { padding: 0.15rem 0 0.35rem; }
.side-link {
  display: block;
  color: var(--muted);
  text-decoration: none;
  padding: 0.28rem 0.85rem;
  font-size: 0.92rem;
  line-height: 1.45;
  border-left: 2px solid transparent;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.side-link:hover { color: var(--text); text-decoration: none; }
.side-link.is-active {
  color: var(--text);
  font-weight: 600;
  border-left-color: var(--accent);
}

main {
  min-width: 0;
  padding: 2rem 2.5rem 4rem;
}
.prose { min-width: 0; max-width: none; }
.toc {
  position: sticky;
  top: var(--header);
  height: calc(100vh - var(--header));
  overflow: auto;
  padding: 1.35rem 1.25rem 2rem 0.25rem;
}
.toc-mobile { display: none; }
.toc-link {
  display: block;
  color: var(--muted);
  text-decoration: none;
  font-size: 0.84rem;
  line-height: 1.35;
  padding: 0.25rem 0 0.25rem 0.7rem;
  border-left: 2px solid var(--border);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.toc-3 { padding-left: 1.3rem; }
.toc-link.is-active { color: var(--accent); border-color: var(--accent); }
.toc-link:hover { color: var(--text); text-decoration: none; }
.prose { min-width: 0; max-width: 46rem; }
.prose h1, .prose h2, .prose h3 { line-height: 1.25; letter-spacing: -0.02em; }
.prose h1 { font-size: 2.35rem; font-weight: 650; margin: 0 0 1.25rem; }
.prose h2 { font-size: 1.45rem; margin: 2.2rem 0 0.75rem; }
.prose h3 { font-size: 1.15rem; margin: 1.6rem 0 0.5rem; }
.heading-anchor { color: inherit; text-decoration: none; }
.heading-anchor:hover { text-decoration: underline; }
.prose p, .prose ul, .prose ol { margin: 0 0 1rem; }
.prose li + li { margin-top: 0.25rem; }
.prose table { width: 100%; border-collapse: collapse; margin: 0 0 1.25rem; font-size: 0.95rem; }
.prose th, .prose td { text-align: left; border-bottom: 1px solid var(--border); padding: 0.55rem 0.7rem; vertical-align: top; }
.prose th { color: var(--muted); font-weight: 600; }
.prose code {
  font-family: var(--mono);
  font-size: 0.88em;
  font-weight: 600;
  color: var(--code-inline);
  background: var(--code-inline-bg);
  border-radius: 4px;
  padding: 0.12rem 0.35rem;
}
.prose pre code {
  color: inherit;
  font-weight: inherit;
  background: transparent;
  padding: 0;
  border-radius: 0;
}

.code-block {
  position: relative;
  margin: 0 0 1.25rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  overflow: hidden;
}
.code-title {
  display: block;
  padding: 0.55rem 5rem 0 1rem;
  color: var(--muted);
  font-family: var(--mono);
  font-size: 0.78rem;
}
.copy {
  position: absolute;
  top: 0.35rem;
  right: 0.35rem;
  min-height: 36px;
}
.code-block pre {
  margin: 0;
  padding: 1rem;
  overflow-x: auto;
  font-family: var(--mono);
  font-size: 0.84rem;
  line-height: 1.55;
}
.shiki code { counter-reset: ln; }
.shiki .line { display: block; }
.shiki .line::before {
  counter-increment: ln;
  content: counter(ln);
  display: inline-block;
  width: 1.6rem;
  margin-right: 1rem;
  color: var(--muted);
  text-align: right;
  user-select: none;
}
.copy-md {
  display: flex;
  width: 100%;
  justify-content: flex-start;
  margin: 0 0 1rem;
  color: var(--muted);
  min-height: 36px;
  padding-left: 0;
}
html.light .shiki, html.light .shiki span {
  color: var(--shiki-light) !important;
  background-color: var(--shiki-light-bg) !important;
}
html.dark .shiki, html.dark .shiki span {
  color: var(--shiki-dark) !important;
  background-color: var(--shiki-dark-bg) !important;
}
html.light .shiki .line::before,
html.dark .shiki .line::before {
  color: var(--muted) !important;
  background: transparent !important;
}
.tabs { margin: 0 0 1.25rem; }
.tab-list { display: flex; gap: 0.25rem; }
.tab[aria-selected="true"] { color: var(--accent); background: var(--accent-wash); }
.tabs .code-block { margin-bottom: 0; }

.callout {
  border: 1px solid var(--border);
  border-left-width: 3px;
  border-radius: 10px;
  padding: 0.8rem 1rem 0.2rem;
  margin: 0 0 1.25rem;
}
.callout-note { border-left-color: var(--note); background: var(--note-bg); }
.callout-tip { border-left-color: var(--tip); background: var(--tip-bg); }
.callout-warning { border-left-color: var(--warning); background: var(--warning-bg); }
.callout p:last-child { margin-bottom: 0.6rem; }

.pager {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  margin-top: 2.5rem;
}
.pager-link {
  display: flex;
  flex-direction: column;
  min-height: 44px;
  min-width: 10rem;
  padding: 0.8rem 1rem;
  border: 1px solid var(--border);
  border-radius: 12px;
  color: var(--text);
  text-decoration: none;
}
.pager-link span { color: var(--muted); font-size: 0.8rem; }
.pager-next { margin-left: auto; text-align: right; }
.pager-link:hover { border-color: var(--accent); text-decoration: none; }

.backdrop {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.45);
  z-index: 45;
}
.drawer {
  position: fixed;
  z-index: 46;
  inset: 0 auto 0 0;
  width: min(20rem, 88vw);
  background: var(--bg);
  border-right: 1px solid var(--border);
  overflow: auto;
}
.drawer .sidebar {
  position: static;
  height: auto;
  border: 0;
}
.drawer-head {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0.5rem 0.75rem 0 1rem;
}
.search-dialog {
  width: min(40rem, calc(100vw - 2rem));
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 0;
  background: var(--bg);
  color: var(--text);
  box-shadow: var(--shadow);
}
.search-dialog::backdrop { background: rgba(0, 0, 0, 0.45); }
.search-input {
  width: 100%;
  border: 0;
  border-bottom: 1px solid var(--border);
  background: transparent;
  color: inherit;
  font: inherit;
  padding: 1rem 1.1rem;
  outline: none;
}
.search-results { max-height: 24rem; overflow: auto; padding: 0.4rem; }
.search-group {
  margin: 0.35rem 0 0.15rem;
  padding: 0.35rem 0.75rem 0.15rem;
  color: var(--muted);
  font-size: 0.72rem;
  font-weight: 650;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}
.search-hit {
  display: grid;
  grid-template-columns: 1.25rem minmax(0, 1fr) auto;
  align-items: start;
  gap: 0.65rem;
  width: 100%;
  text-align: left;
  border: 0;
  background: transparent;
  color: inherit;
  font: inherit;
  border-radius: 8px;
  padding: 0.65rem 0.75rem;
  cursor: pointer;
}
.search-hit-icon {
  color: var(--muted);
  margin-top: 0.15rem;
  display: flex;
}
.search-hit-body { min-width: 0; }
.search-hit strong {
  display: block;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.search-hit span {
  display: block;
  color: var(--muted);
  font-size: 0.85rem;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.search-hit mark {
  color: var(--search-mark);
  background: transparent;
  font-weight: 700;
}
.search-hit-enter {
  color: var(--muted);
  opacity: 0;
  align-self: center;
}
.search-hit.is-active .search-hit-enter,
.search-hit:hover .search-hit-enter { opacity: 1; }
.search-hit.is-active, .search-hit:hover { background: var(--accent-wash); }
.search-empty { color: var(--muted); padding: 1rem; }

@media (max-width: 1100px) {
  .header { grid-template-columns: auto minmax(0, 1fr) auto; }
  .layout { grid-template-columns: var(--sidebar) minmax(0, 1fr); }
  .toc { display: none; }
  .toc-mobile {
    display: block;
    margin-bottom: 1.25rem;
    border: 1px solid var(--border);
    border-radius: 10px;
    padding: 0.6rem 0.9rem;
  }
  .toc-mobile summary { cursor: pointer; min-height: 44px; display: flex; align-items: center; }
}

@media (max-width: 767px) {
  .header { grid-template-columns: auto minmax(0, 1fr) auto; padding: 0 0.75rem; }
  .menu-button, .search-icon { display: inline-flex; align-items: center; }
  .search-trigger, .version { display: none; }
  .layout { grid-template-columns: minmax(0, 1fr); }
  .layout > .sidebar { display: none; }
  main { padding: 1.25rem 1.25rem 3rem; }
  .pager { flex-direction: column-reverse; }
  .pager-next { margin-left: 0; text-align: left; }
  .prose h1 { font-size: 1.7rem; }
}