:root {
  --bg: #f6f8fb;
  --panel: #ffffff;
  --ink: #182230;
  --muted: #667085;
  --line: #d9e2ec;
  --accent: #1f5eff;
  --accent-dark: #123ea3;
  --code-bg: #0f172a;
  --code-ink: #e2e8f0;
  --warn-bg: #fff7ed;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; font-family: Inter, ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Arial, sans-serif; background: var(--bg); color: var(--ink); line-height: 1.58; }
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }
.site { display: grid; grid-template-columns: 292px minmax(0, 1fr); min-height: 100vh; }
.sidebar { position: sticky; top: 0; height: 100vh; overflow-y: auto; padding: 24px 18px; background: #0b1220; color: #e5e7eb; border-right: 1px solid #111827; }
.brand { font-size: 15px; letter-spacing: .08em; text-transform: uppercase; color: #93c5fd; font-weight: 700; margin-bottom: 6px; }
.sidebar h1 { font-size: 22px; line-height: 1.2; margin: 0 0 18px; color: #fff; }
.sidebar .small { color: #9ca3af; font-size: 13px; margin-bottom: 22px; }
.nav-section { margin: 20px 0 8px; font-size: 12px; color: #93c5fd; text-transform: uppercase; letter-spacing: .08em; font-weight: 700; }
.nav a { display: block; color: #d1d5db; padding: 8px 10px; border-radius: 8px; font-size: 14px; }
.nav a:hover, .nav a.active { background: #172554; color: #fff; text-decoration: none; }
.main { padding: 34px 44px 80px; max-width: 1120px; width: 100%; }
.hero { background: linear-gradient(135deg, #ffffff, #eef4ff); border: 1px solid var(--line); border-radius: 18px; padding: 28px; margin-bottom: 28px; box-shadow: 0 12px 28px rgba(16,24,40,.06); }
.hero h1 { margin: 0 0 8px; font-size: 38px; line-height: 1.1; }
.hero p { margin: 0; color: var(--muted); font-size: 17px; }
.card-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); gap: 16px; margin: 24px 0; }
.card { background: var(--panel); border: 1px solid var(--line); border-radius: 14px; padding: 18px; box-shadow: 0 6px 18px rgba(16,24,40,.04); }
.card h3 { margin: 0 0 8px; font-size: 18px; }
.card p { margin: 0 0 10px; color: var(--muted); font-size: 14px; }
.content { background: var(--panel); border: 1px solid var(--line); border-radius: 18px; padding: 34px; box-shadow: 0 12px 28px rgba(16,24,40,.05); }
.content h1 { font-size: 34px; line-height: 1.15; margin: 0 0 20px; }
.content h2 { font-size: 26px; margin-top: 34px; padding-top: 12px; border-top: 1px solid var(--line); }
.content h3 { font-size: 21px; margin-top: 28px; }
.content h4 { font-size: 18px; margin-top: 22px; }
.content p { margin: 10px 0; }
.content ul, .content ol { padding-left: 24px; }
.content li { margin: 6px 0; }
table { border-collapse: collapse; width: 100%; margin: 18px 0; font-size: 14px; overflow: hidden; border-radius: 10px; }
th, td { border: 1px solid var(--line); padding: 10px 12px; vertical-align: top; }
th { background: #eef4ff; font-weight: 700; }
tr:nth-child(even) td { background: #fbfdff; }
pre { background: var(--code-bg); color: var(--code-ink); padding: 16px; border-radius: 12px; overflow-x: auto; font-size: 13px; line-height: 1.5; }
code { background: #eef2ff; color: #1e3a8a; padding: 2px 5px; border-radius: 5px; }
pre code { background: transparent; color: inherit; padding: 0; }
.notice { background: var(--warn-bg); border: 1px solid #fed7aa; padding: 14px 16px; border-radius: 12px; margin: 18px 0; color: #7c2d12; }
.doc-meta { color: var(--muted); font-size: 14px; margin-bottom: 18px; }
.downloads { display: flex; flex-wrap: wrap; gap: 10px; margin: 18px 0; }
.btn { display: inline-block; background: var(--accent); color: white; padding: 10px 14px; border-radius: 10px; font-weight: 700; font-size: 14px; }
.btn:hover { background: var(--accent-dark); text-decoration: none; }
.footer { color: var(--muted); margin-top: 28px; font-size: 13px; }
.mobile-top { display: none; background: #0b1220; color: #fff; padding: 14px 18px; }
.mobile-top a { color: #bfdbfe; }
@media (max-width: 900px) {
  .site { display: block; }
  .sidebar { position: relative; width: 100%; height: auto; }
  .main { padding: 22px 14px 60px; }
  .content { padding: 22px; }
  .hero h1 { font-size: 30px; }
}