:root {
  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
  --font-mono: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;

  --bg: #ffffff;
  --bg-sidebar: #f6f8fa;
  --bg-code-inline: #f6f8fa;
  --bg-code-block: #0d1117;
  --bg-note: #dbeafe;
  --bg-warning: #fef3c7;
  --bg-tip: #dcfce7;

  --border: #d0d7de;
  --border-code: #d0d7de;

  --text: #1f2328;
  --text-muted: #656d76;
  --text-code-block: #c9d1d9;

  --link: #0969da;
  --link-hover: #0550ae;

  --accent: #6366f1;
  --accent-bg: #eef2ff;

  --header-bg: #1e1b4b;
  --header-border: rgba(255,255,255,0.08);

  --sidebar-width: 260px;
  --toc-width: 220px;
  --content-max: 760px;
  --radius: 6px;
}

*, *::before, *::after { box-sizing: border-box; }

html { scroll-behavior: smooth; scroll-padding-top: 80px; }

body {
  margin: 0;
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.7;
  color: var(--text);
  background: var(--bg);
}

a { color: var(--link); text-decoration: none; }
a:hover { color: var(--link-hover); text-decoration: underline; }

img { max-width: 100%; }

/* ─── HEADER ─────────────────────────────────────────────────────────────── */

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  height: 60px;
  background: var(--header-bg);
  border-bottom: 1px solid var(--header-border);
  display: flex;
  align-items: center;
  padding: 0 24px;
  gap: 20px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  color: #fff;
  font-weight: 700;
  font-size: 1rem;
  white-space: nowrap;
  flex-shrink: 0;
  text-decoration: none;
}
.brand:hover { text-decoration: none; color: #fff; }

.brand-icon {
  width: 28px;
  height: 28px;
  background: rgba(99,102,241,0.25);
  border: 1px solid rgba(99,102,241,0.4);
  border-radius: 6px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
}

.brand-version {
  font-size: 11px;
  font-weight: 600;
  background: rgba(99,102,241,0.3);
  color: #a5b4fc;
  border: 1px solid rgba(99,102,241,0.4);
  border-radius: 999px;
  padding: 2px 8px;
  margin-left: 4px;
}

.header-search {
  flex: 1;
  max-width: 340px;
}

.header-search form {
  position: relative;
}

.header-search input {
  width: 100%;
  background: rgba(255,255,255,0.08);
  border: 1px solid rgba(255,255,255,0.15);
  border-radius: 6px;
  color: #fff;
  padding: 7px 12px 7px 36px;
  font: inherit;
  font-size: 14px;
  outline: none;
  transition: border-color .15s, background .15s;
}

.header-search input::placeholder { color: rgba(255,255,255,0.4); }

.header-search input:focus {
  background: rgba(255,255,255,0.12);
  border-color: rgba(99,102,241,0.6);
}

.header-search .search-icon {
  position: absolute;
  left: 10px;
  top: 50%;
  transform: translateY(-50%);
  color: rgba(255,255,255,0.4);
  pointer-events: none;
  font-size: 14px;
}

.header-actions {
  margin-left: auto;
  display: flex;
  align-items: center;
  gap: 12px;
  flex-shrink: 0;
}

.header-link {
  color: rgba(255,255,255,0.75);
  font-size: 14px;
  font-weight: 500;
  transition: color .15s;
  text-decoration: none;
}
.header-link:hover { color: #fff; text-decoration: none; }

.btn-header {
  background: rgba(99,102,241,0.25);
  border: 1px solid rgba(99,102,241,0.5);
  color: #c7d2fe;
  border-radius: 6px;
  padding: 6px 14px;
  font-size: 13px;
  font-weight: 600;
  transition: .15s;
  text-decoration: none;
}
.btn-header:hover { background: rgba(99,102,241,0.4); color: #fff; text-decoration: none; }

/* ─── LAYOUT ──────────────────────────────────────────────────────────────── */

.docs-layout {
  display: grid;
  grid-template-columns: var(--sidebar-width) minmax(0, 1fr) var(--toc-width);
  min-height: calc(100vh - 60px);
  align-items: start;
}

/* ─── SIDEBAR ─────────────────────────────────────────────────────────────── */

.docs-sidebar {
  position: sticky;
  top: 60px;
  height: calc(100vh - 60px);
  overflow-y: auto;
  background: var(--bg-sidebar);
  border-right: 1px solid var(--border);
  padding: 20px 0 40px;
}

.sidebar-section {
  margin-bottom: 4px;
}

.sidebar-section-title {
  padding: 8px 16px 4px;
  font-size: 12px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .05em;
  color: var(--text-muted);
}

.sidebar-nav {
  list-style: none;
  margin: 0;
  padding: 0;
}

.sidebar-nav li a {
  display: block;
  padding: 6px 16px;
  font-size: 14px;
  color: var(--text);
  border-radius: 0;
  transition: background .1s, color .1s;
  text-decoration: none;
  border-left: 3px solid transparent;
}

.sidebar-nav li a:hover {
  background: rgba(0,0,0,0.05);
  color: var(--text);
  text-decoration: none;
}

.sidebar-nav li a.active {
  background: var(--accent-bg);
  color: var(--accent);
  border-left-color: var(--accent);
  font-weight: 600;
}

/* ─── MAIN CONTENT ────────────────────────────────────────────────────────── */

.docs-content {
  padding: 40px 48px;
  max-width: var(--content-max);
}

.breadcrumbs {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 13px;
  color: var(--text-muted);
  margin-bottom: 24px;
}

.breadcrumbs a { color: var(--text-muted); text-decoration: none; }
.breadcrumbs a:hover { color: var(--link); text-decoration: underline; }
.breadcrumbs .sep { color: var(--border); }

.docs-title {
  font-size: 2rem;
  font-weight: 700;
  line-height: 1.2;
  margin: 0 0 8px;
  color: var(--text);
}

.docs-intro {
  font-size: 1.05rem;
  color: var(--text-muted);
  margin: 0 0 32px;
  border-bottom: 1px solid var(--border);
  padding-bottom: 24px;
}

.docs-meta {
  font-size: 13px;
  color: var(--text-muted);
  margin-bottom: 32px;
}

/* ─── CONTENT SECTIONS ────────────────────────────────────────────────────── */

.content-section {
  margin-bottom: 40px;
}

.content-section h2 {
  font-size: 1.35rem;
  font-weight: 700;
  margin: 0 0 16px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--border);
  scroll-margin-top: 80px;
}

.content-section h3 {
  font-size: 1.1rem;
  font-weight: 700;
  margin: 20px 0 10px;
}

.content-section p {
  margin: 0 0 14px;
  color: var(--text);
}

.content-section ol,
.content-section ul {
  padding-left: 24px;
  margin: 0 0 14px;
}

.content-section li { margin-bottom: 6px; }

/* ─── CODE ────────────────────────────────────────────────────────────────── */

code {
  font-family: var(--font-mono);
  font-size: .875em;
  background: var(--bg-code-inline);
  border: 1px solid var(--border-code);
  border-radius: 4px;
  padding: 2px 6px;
  color: var(--text);
}

pre {
  background: var(--bg-code-block);
  border-radius: var(--radius);
  padding: 18px 20px;
  overflow-x: auto;
  margin: 0 0 16px;
  position: relative;
}

pre code {
  background: none;
  border: none;
  padding: 0;
  font-size: 14px;
  color: var(--text-code-block);
  line-height: 1.65;
}

.code-wrap {
  margin: 0 0 16px;
}

.code-lang {
  background: #161b22;
  border: 1px solid #30363d;
  border-bottom: none;
  border-radius: 6px 6px 0 0;
  padding: 6px 14px;
  font-size: 12px;
  font-family: var(--font-mono);
  color: #8b949e;
  display: inline-block;
}

.code-wrap pre {
  border-radius: 0 6px 6px 6px;
  margin: 0;
}

/* ─── NOTE / WARNING / TIP ────────────────────────────────────────────────── */

.callout {
  display: flex;
  gap: 12px;
  padding: 14px 16px;
  border-radius: var(--radius);
  margin: 0 0 16px;
  font-size: 14px;
}

.callout-icon { font-size: 16px; flex-shrink: 0; margin-top: 2px; }

.callout-note   { background: var(--bg-note); border: 1px solid #93c5fd; }
.callout-warning { background: var(--bg-warning); border: 1px solid #fcd34d; }
.callout-tip    { background: var(--bg-tip); border: 1px solid #86efac; }

/* ─── TABLE ───────────────────────────────────────────────────────────────── */

.docs-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
  margin: 0 0 16px;
}

.docs-table th,
.docs-table td {
  text-align: left;
  padding: 10px 14px;
  border: 1px solid var(--border);
}

.docs-table th {
  background: var(--bg-sidebar);
  font-weight: 600;
  color: var(--text-muted);
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: .04em;
}

.docs-table tr:hover td {
  background: #f6f8fa;
}

.docs-table code {
  font-size: .8em;
  background: rgba(175,184,193,0.2);
  border: 1px solid rgba(175,184,193,0.4);
}

/* ─── TOC ─────────────────────────────────────────────────────────────────── */

.docs-toc {
  position: sticky;
  top: 60px;
  height: calc(100vh - 60px);
  overflow-y: auto;
  padding: 32px 20px 40px;
  border-left: 1px solid var(--border);
}

.toc-title {
  font-size: 12px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .05em;
  color: var(--text-muted);
  margin-bottom: 12px;
}

.toc-list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.toc-list li a {
  display: block;
  padding: 4px 0;
  font-size: 13px;
  color: var(--text-muted);
  text-decoration: none;
  border-left: 2px solid transparent;
  padding-left: 10px;
  transition: color .1s, border-color .1s;
  line-height: 1.4;
}

.toc-list li a:hover {
  color: var(--link);
  border-left-color: var(--border);
  text-decoration: none;
}

/* ─── SEARCH RESULTS ──────────────────────────────────────────────────────── */

.search-result {
  padding: 20px 0;
  border-bottom: 1px solid var(--border);
}

.search-result:first-child { padding-top: 0; }
.search-result:last-child { border-bottom: none; }

.search-result h3 { margin: 0 0 6px; font-size: 1rem; }
.search-result p  { margin: 0; font-size: 14px; color: var(--text-muted); }

.search-label {
  display: inline-block;
  font-size: 12px;
  font-weight: 600;
  background: var(--accent-bg);
  color: var(--accent);
  border-radius: 4px;
  padding: 2px 8px;
  margin-bottom: 6px;
}

/* ─── HOMEPAGE ────────────────────────────────────────────────────────────── */

.home-hero {
  padding: 72px 48px 48px;
  max-width: 760px;
  margin: 0 auto;
}

.home-hero h1 {
  font-size: 2.5rem;
  font-weight: 800;
  margin: 0 0 16px;
  line-height: 1.15;
}

.home-hero p {
  font-size: 1.1rem;
  color: var(--text-muted);
  margin: 0 0 32px;
  max-width: 580px;
}

.home-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0,1fr));
  gap: 16px;
  padding: 0 48px 48px;
  max-width: 760px;
  margin: 0 auto;
}

.home-card {
  display: block;
  padding: 20px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  text-decoration: none;
  transition: border-color .15s, box-shadow .15s;
}

.home-card:hover {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(99,102,241,0.1);
  text-decoration: none;
}

.home-card-icon { font-size: 1.5rem; margin-bottom: 10px; }
.home-card h3   { margin: 0 0 6px; font-size: .95rem; font-weight: 700; color: var(--text); }
.home-card p    { margin: 0; font-size: 14px; color: var(--text-muted); }

/* ─── FOOTER ──────────────────────────────────────────────────────────────── */

.site-footer {
  border-top: 1px solid var(--border);
  padding: 24px 48px;
  font-size: 13px;
  color: var(--text-muted);
  margin-top: auto;
}

/* ─── PREV/NEXT ───────────────────────────────────────────────────────────── */

.page-nav {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  margin-top: 48px;
  padding-top: 24px;
  border-top: 1px solid var(--border);
}

.page-nav a {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 14px 18px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  flex: 1;
  text-decoration: none;
  transition: border-color .15s;
}

.page-nav a:hover { border-color: var(--accent); text-decoration: none; }
.page-nav .nav-label { font-size: 12px; color: var(--text-muted); }
.page-nav .nav-title { font-size: 14px; font-weight: 600; color: var(--text); }
.page-nav .next { align-items: flex-end; }

/* ─── RESPONSIVE ──────────────────────────────────────────────────────────── */

@media (max-width: 1100px) {
  .docs-layout { grid-template-columns: var(--sidebar-width) minmax(0,1fr); }
  .docs-toc { display: none; }
}

@media (max-width: 768px) {
  .docs-layout { grid-template-columns: 1fr; }
  .docs-sidebar { position: static; height: auto; border-right: none; border-bottom: 1px solid var(--border); }
  .docs-content { padding: 24px 20px; }
  .home-hero    { padding: 40px 20px 24px; }
  .home-grid    { padding: 0 20px 24px; grid-template-columns: 1fr; }
  .site-footer  { padding: 20px; }
}