:root {
  color-scheme: light;
  --bg: #f8fafb;
  --bg-muted: #f2f5f7;
  --surface: #ffffff;
  --surface-muted: #f9fbfc;
  --line: #dbe4ea;
  --line-strong: #c4d1da;
  --text: #1f2d3d;
  --text-soft: #607080;
  --accent: #4fb400;
  --accent-strong: #3f9400;
  --accent-soft: rgba(79, 180, 0, 0.12);
  --code-bg: #1f2937;
  --code-border: #111827;
  --shadow: 0 10px 26px rgba(15, 23, 42, 0.05);
  --radius-lg: 18px;
  --radius-md: 14px;
  --radius-sm: 10px;
  --content-width: 78rem;
  --reading-width: 44rem;
  --sidebar-width: 17rem;
}

@media (prefers-color-scheme: dark) {
  :root {
    color-scheme: dark;
    --bg: #0f1419;
    --bg-muted: #141b22;
    --surface: #19212a;
    --surface-muted: #1e2833;
    --line: #2d3945;
    --line-strong: #435363;
    --text: #ebf0f5;
    --text-soft: #a7b5c0;
    --accent: #7ad83b;
    --accent-strong: #95e55f;
    --accent-soft: rgba(122, 216, 59, 0.16);
    --code-bg: #0b1117;
    --code-border: #2b3642;
    --shadow: 0 18px 38px rgba(0, 0, 0, 0.28);
  }
}

* {
  box-sizing: border-box;
}

[hidden] {
  display: none !important;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  color: var(--text);
  background:
    radial-gradient(circle at top, rgba(79, 180, 0, 0.06), transparent 24rem),
    linear-gradient(180deg, var(--bg) 0%, var(--bg-muted) 100%);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Hiragino Sans", "Yu Gothic", sans-serif;
  line-height: 1.75;
}

a {
  color: inherit;
  text-decoration: none;
}

img {
  max-width: 100%;
  height: auto;
  border-radius: var(--radius-sm);
}

code,
pre,
kbd {
  font-family: "IBM Plex Mono", "SFMono-Regular", "Menlo", monospace;
}

:focus-visible {
  outline: 3px solid color-mix(in srgb, var(--accent) 30%, transparent);
  outline-offset: 2px;
}

.site-shell {
  min-height: 100vh;
}

.site-header {
  background: color-mix(in srgb, var(--surface) 96%, transparent);
  border-bottom: 1px solid var(--line);
  box-shadow: 0 1px 0 rgba(255, 255, 255, 0.8);
}

.site-header-inner,
.site-main,
.site-footer-inner {
  width: min(calc(100% - 2rem), var(--content-width));
  margin: 0 auto;
}

.site-header-inner {
  display: grid;
  grid-template-columns: auto minmax(20rem, 1fr) auto;
  gap: 1.25rem;
  align-items: center;
  padding: 0.95rem 0;
}

.brand-link {
  display: inline-flex;
  align-items: center;
  min-width: 0;
  color: var(--text-soft);
}

.brand-home {
  font-size: 0.92rem;
  font-weight: 700;
  letter-spacing: 0.01em;
  white-space: nowrap;
}

.header-links {
  display: inline-flex;
  gap: 0.75rem;
  align-items: center;
  justify-content: flex-end;
}

.search-toggle {
  display: none;
  align-items: center;
  justify-content: center;
  gap: 0.35rem;
  min-height: 2.5rem;
  padding: 0.58rem 0.82rem;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  background: color-mix(in srgb, var(--surface) 85%, transparent);
  color: var(--text-soft);
  font: inherit;
}

.search-toggle-icon {
  font-size: 1rem;
}

.search-toggle-label {
  font-size: 0.9rem;
  font-weight: 700;
}

.header-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 2.5rem;
  padding: 0.58rem 0.92rem;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  background: color-mix(in srgb, var(--surface) 85%, transparent);
  color: var(--text-soft);
  transition: border-color 140ms ease, background-color 140ms ease, color 140ms ease;
  white-space: nowrap;
}

.header-link:hover,
.header-link:focus-visible,
.brand-link:hover .brand-name,
.brand-link:focus-visible .brand-name {
  color: var(--accent-strong);
  border-color: var(--line-strong);
}

.header-link-primary {
  color: var(--text);
  background: color-mix(in srgb, var(--accent) 10%, var(--surface));
  border-color: color-mix(in srgb, var(--accent) 24%, var(--line));
}

.site-main {
  padding: 2rem 0 3.5rem;
}

.site-footer-inner {
  padding: 0 0 3rem;
}

.site-footer-card {
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  padding: 1rem 1.15rem;
  background: color-mix(in srgb, var(--surface) 92%, transparent);
  color: var(--text-soft);
}

.page-grid,
.section-layout,
.layout-stack,
.sidebar-list,
.doc-list,
.section-list {
  display: grid;
  gap: 1rem;
}

.article-layout {
  grid-template-columns: minmax(0, 1fr) var(--sidebar-width);
  gap: 1.75rem;
  align-items: start;
}

.article-main {
  min-width: 0;
}

.article-panel,
.sidebar-panel,
.overview-panel,
.search-page-shell {
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background: var(--surface);
  box-shadow: var(--shadow);
}

.article-panel {
  padding: clamp(1.5rem, 2.8vw, 3rem);
}

.sidebar-panel,
.overview-panel,
.search-page-shell {
  padding: 1.25rem;
}

.breadcrumbs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.45rem;
  margin-bottom: 1rem;
  color: var(--text-soft);
  font-size: 0.9rem;
}

.breadcrumbs a {
  color: var(--text-soft);
}

.breadcrumbs a:hover,
.breadcrumbs a:focus-visible {
  color: var(--accent-strong);
}

.breadcrumbs span[aria-current="page"] {
  color: var(--text);
  font-weight: 600;
}

.page-header {
  padding-bottom: 1rem;
  border-bottom: 1px solid color-mix(in srgb, var(--line) 92%, transparent);
}

.page-kicker {
  display: inline-flex;
  align-items: center;
  margin-bottom: 0.85rem;
  padding: 0.22rem 0.55rem;
  border-radius: 999px;
  background: var(--accent-soft);
  color: var(--accent-strong);
  font-size: 0.72rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.page-title {
  margin: 0;
  max-width: 24ch;
  font-size: clamp(2.15rem, 4vw, 3rem);
  line-height: 1.12;
  letter-spacing: -0.03em;
}

.page-description {
  max-width: 52rem;
  margin: 0.9rem 0 0;
  color: var(--text-soft);
  font-size: 1.02rem;
}

.page-meta {
  margin-top: 0.9rem;
  color: var(--text-soft);
  font-size: 0.82rem;
}

.page-updated {
  display: inline-block;
}

.markdown {
  max-width: var(--reading-width);
  margin-top: 1.9rem;
  font-size: 1.02rem;
  line-height: 1.95;
}

.markdown > :first-child {
  margin-top: 0;
}

.markdown p,
.markdown ul,
.markdown ol,
.markdown blockquote,
.markdown pre,
.markdown table {
  margin: 1.35rem 0;
}

.markdown h1,
.markdown h2,
.markdown h3 {
  margin: 2.3rem 0 0.85rem;
  line-height: 1.35;
  letter-spacing: -0.02em;
}

.markdown h1 {
  font-size: clamp(1.8rem, 3vw, 2.3rem);
}

.markdown h2 {
  padding-bottom: 0.55rem;
  border-bottom: 1px solid var(--line);
  font-size: clamp(1.4rem, 2.4vw, 1.8rem);
}

.markdown h3 {
  font-size: clamp(1.16rem, 2vw, 1.35rem);
}

.markdown a {
  color: var(--accent-strong);
  font-weight: 600;
}

.markdown a:hover,
.markdown a:focus-visible {
  color: var(--accent);
}

.markdown ul,
.markdown ol {
  padding-left: 1.55rem;
}

.markdown li + li {
  margin-top: 0.48rem;
}

.markdown blockquote {
  padding: 1rem 1.1rem;
  border-left: 4px solid var(--accent);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  background: color-mix(in srgb, var(--accent) 6%, var(--surface));
  color: var(--text-soft);
}

.markdown table {
  display: block;
  width: 100%;
  overflow-x: auto;
  border-collapse: collapse;
  border-spacing: 0;
}

.markdown th,
.markdown td {
  padding: 0.75rem 0.9rem;
  border: 1px solid var(--line);
  text-align: left;
}

.markdown th {
  background: var(--surface-muted);
}

.markdown tbody tr:nth-child(even) td {
  background: color-mix(in srgb, var(--surface-muted) 70%, var(--surface));
}

.markdown :not(pre) > code {
  padding: 0.18rem 0.42rem;
  border: 1px solid color-mix(in srgb, var(--accent) 18%, var(--line));
  border-radius: 6px;
  background: color-mix(in srgb, var(--accent) 8%, var(--surface));
  font-size: 0.9em;
}

.markdown pre {
  padding: 1rem 1.15rem;
  overflow-x: auto;
  border: 1px solid var(--code-border);
  border-radius: var(--radius-md);
  background: var(--code-bg);
  color: #e7eef6;
}

.markdown pre code {
  font-size: 0.9rem;
  line-height: 1.8;
}

.hljs-keyword,
.hljs-selector-tag,
.hljs-title.function_ {
  color: #f59e0b;
}

.hljs-string,
.hljs-attr,
.hljs-title,
.hljs-section {
  color: #86efac;
}

.hljs-number,
.hljs-literal,
.hljs-symbol {
  color: #93c5fd;
}

.hljs-comment,
.hljs-quote {
  color: #8aa0b6;
}

.sidebar-panel {
  position: sticky;
  top: 5.5rem;
}

.sidebar-panel-outline {
  padding: 1rem 0.95rem;
  background: color-mix(in srgb, var(--surface) 92%, transparent);
}

.sidebar-panel-nearby {
  position: static;
  margin-top: 1.75rem;
  padding: 1rem;
}

.sidebar-heading,
.overview-title,
.search-page-title {
  margin: 0 0 0.9rem;
  font-size: 0.96rem;
  font-weight: 800;
  letter-spacing: -0.02em;
}

.sidebar-list,
.doc-list,
.section-list {
  margin: 0;
  padding: 0;
  list-style: none;
}

.doc-list {
  grid-template-columns: repeat(auto-fit, minmax(16rem, 1fr));
}

.sidebar-link,
.doc-card,
.search-page-card,
.search-result-card {
  display: block;
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  background: var(--surface);
  transition: border-color 140ms ease, background-color 140ms ease, transform 140ms ease;
}

.sidebar-link,
.doc-card,
.search-page-card {
  padding: 0.95rem 1rem;
}

.search-result-card {
  padding: 0.85rem 0.95rem;
  background: var(--surface-muted);
}

.sidebar-link:hover,
.doc-card:hover,
.search-page-card:hover,
.search-result-card:hover {
  border-color: color-mix(in srgb, var(--accent) 28%, var(--line-strong));
  background: color-mix(in srgb, var(--accent) 4%, var(--surface));
  transform: translateY(-1px);
}

.sidebar-link {
  color: var(--text-soft);
}

.sidebar-link strong,
.doc-card-title,
.search-page-title,
.search-result-title {
  display: block;
  color: var(--text);
  font-weight: 800;
  line-height: 1.45;
}

.sidebar-link-meta {
  display: block;
  margin-top: 0.28rem;
  font-size: 0.83rem;
}

.sidebar-panel-nearby .sidebar-heading {
  margin-bottom: 0.75rem;
  font-size: 0.88rem;
}

.sidebar-panel-nearby .sidebar-list {
  gap: 0.45rem;
}

.sidebar-panel-nearby .sidebar-link {
  padding: 0.72rem 0.8rem;
  border-radius: 12px;
}

.sidebar-panel-nearby .sidebar-link strong {
  font-size: 0.92rem;
  line-height: 1.4;
}

.sidebar-panel-outline .sidebar-heading {
  margin: 0 0 0.75rem;
  padding: 0 0.9rem;
  color: var(--text-soft);
  font-size: 0.82rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.sidebar-panel-outline .sidebar-list {
  gap: 0.1rem;
}

.sidebar-panel-outline .sidebar-link {
  position: relative;
  padding: 0.45rem 0.9rem 0.45rem 1.15rem;
  border: 0;
  border-radius: 0;
  background: transparent;
  color: var(--text-soft);
  transform: none;
}

.sidebar-panel-outline .sidebar-link::before {
  content: "";
  position: absolute;
  left: 0.35rem;
  top: 0.5rem;
  bottom: 0.5rem;
  width: 2px;
  border-radius: 999px;
  background: var(--line);
}

.sidebar-panel-outline .sidebar-link strong {
  color: inherit;
  font-size: 0.9rem;
  font-weight: 700;
  line-height: 1.45;
}

.sidebar-panel-outline .sidebar-link:hover,
.sidebar-panel-outline .sidebar-link:focus-visible {
  background: color-mix(in srgb, var(--accent) 5%, transparent);
  color: var(--text);
}

.sidebar-panel-outline .sidebar-link:hover::before,
.sidebar-panel-outline .sidebar-link:focus-visible::before {
  background: var(--accent);
}

.doc-card-title,
.search-page-title,
.search-result-title {
  margin-bottom: 0.35rem;
  font-size: 1rem;
}

.doc-card-kind {
  display: inline-flex;
  margin-bottom: 0.45rem;
  padding: 0.2rem 0.5rem;
  border: 1px solid var(--line);
  border-radius: 999px;
  color: var(--text-soft);
  font-size: 0.68rem;
  font-weight: 800;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.doc-card-path,
.search-page-path,
.search-result-path {
  display: block;
  color: var(--text-soft);
  font-size: 0.88rem;
  word-break: break-word;
}

.doc-card-description,
.search-page-excerpt,
.search-result-excerpt,
.section-description {
  display: block;
  margin-top: 0.55rem;
  color: var(--text-soft);
  line-height: 1.65;
}

.overview-hero {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1rem;
}

.overview-stat {
  padding: 1rem 1.05rem;
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  background: var(--surface-muted);
}

.overview-stat-label {
  display: block;
  margin-bottom: 0.4rem;
  color: var(--text-soft);
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.overview-stat-value {
  display: block;
  font-size: 1.7rem;
  font-weight: 800;
  letter-spacing: -0.03em;
}

.directory-section + .directory-section {
  margin-top: 1.2rem;
  padding-top: 1.2rem;
  border-top: 1px solid var(--line);
}

.directory-heading {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 0.9rem;
}

.directory-title {
  margin: 0;
  font-size: 1.15rem;
  font-weight: 800;
}

.directory-title a:hover,
.directory-title a:focus-visible {
  color: var(--accent-strong);
}

.directory-meta,
.search-page-count {
  color: var(--text-soft);
  font-size: 0.9rem;
}

.search-shell {
  position: relative;
  min-width: 0;
}

.search-label {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.8rem 0.95rem;
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  background: var(--surface);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.7);
}

.search-shell:focus-within .search-label {
  border-color: color-mix(in srgb, var(--accent) 32%, var(--line-strong));
  box-shadow:
    0 0 0 4px color-mix(in srgb, var(--accent) 10%, transparent),
    inset 0 1px 0 rgba(255, 255, 255, 0.7);
}

.search-icon,
.search-shortcut {
  color: var(--text-soft);
}

.search-icon {
  font-size: 1rem;
}

.search-shortcut {
  padding: 0.08rem 0.38rem;
  border: 1px solid var(--line);
  border-radius: 999px;
  font-size: 0.75rem;
}

.search-input {
  width: 100%;
  min-width: 0;
  border: 0;
  padding: 0;
  background: transparent;
  color: var(--text);
  font: inherit;
}

.search-input:focus {
  outline: none;
}

.search-dropdown {
  position: absolute;
  top: calc(100% + 0.65rem);
  left: 0;
  right: 0;
  display: grid;
  gap: 0.65rem;
  padding: 0.75rem;
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  background: color-mix(in srgb, var(--surface) 96%, transparent);
  box-shadow: var(--shadow);
  overflow: hidden;
}

.search-empty {
  display: block;
  padding: 0.9rem 0.95rem;
  border-radius: var(--radius-sm);
  background: var(--surface-muted);
  color: var(--text-soft);
}

mark {
  padding: 0 0.18em;
  border-radius: 0.25em;
  background: color-mix(in srgb, var(--accent) 24%, transparent);
  color: inherit;
}

.empty-state {
  padding: 1.2rem;
  border: 1px dashed var(--line-strong);
  border-radius: var(--radius-md);
  color: var(--text-soft);
}

.empty-state h2 {
  margin: 0 0 0.55rem;
  color: var(--text);
}

.search-page-header {
  margin-bottom: 1rem;
}

.directory-embed {
  margin-top: 2rem;
}

.directory-embed h2 {
  margin: 0 0 1rem;
}

.article-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 1.5rem;
  padding-top: 1rem;
  border-top: 1px solid var(--line);
}

.action-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 2.45rem;
  padding: 0.62rem 0.9rem;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  background: var(--surface-muted);
  color: var(--text-soft);
}

.action-link:hover,
.action-link:focus-visible {
  border-color: color-mix(in srgb, var(--accent) 28%, var(--line-strong));
  color: var(--accent-strong);
}

@media (max-width: 960px) {
  .site-header-inner {
    grid-template-columns: minmax(0, 1fr) auto auto;
    gap: 0.8rem;
  }

  .header-links {
    justify-content: flex-end;
  }

  .search-shell {
    grid-column: 1 / -1;
  }

  .article-layout,
  .overview-hero {
    grid-template-columns: 1fr;
  }

  .sidebar-panel {
    position: static;
  }

  .doc-list {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 720px) {
  .site-header-inner {
    grid-template-columns: minmax(0, 1fr) auto auto;
    gap: 0.9rem;
    align-items: center;
    padding: 0.75rem 0;
  }

  .site-header-inner,
  .site-main,
  .site-footer-inner {
    width: min(calc(100% - 1rem), var(--content-width));
  }

  .search-toggle {
    display: inline-flex;
    justify-self: end;
    min-width: 2.5rem;
    padding: 0.55rem;
  }

  .search-toggle-label {
    display: none;
  }

  .search-shell {
    grid-column: 1 / -1;
    display: none;
  }

  .search-shell[data-mobile-open="true"] {
    display: block;
  }

  .header-links {
    grid-column: auto;
    justify-content: flex-end;
    gap: 0.45rem;
  }

  .header-links .header-link:not(.header-link-primary) {
    display: none;
  }

  .header-link,
  .search-toggle {
    min-height: 2.35rem;
    border-radius: 12px;
  }

  .header-link {
    padding: 0.5rem 0.72rem;
    font-size: 0.88rem;
  }

  .site-main {
    padding-top: 1rem;
  }

  .article-panel,
  .sidebar-panel,
  .overview-panel,
  .search-page-shell {
    padding: 1rem;
    border-radius: var(--radius-md);
  }

  .page-title {
    max-width: none;
    font-size: clamp(1.85rem, 8vw, 2.35rem);
  }

  .markdown {
    font-size: 0.98rem;
  }

  .brand-home {
    font-size: 0.9rem;
  }

  .search-shortcut {
    display: none;
  }
}