:root {
      --max: 820px;
      --header-h: 72px;
    }

    * { box-sizing: border-box; }

    html {
      scroll-behavior: smooth;
      scroll-padding-top: calc(var(--header-h) + 16px);
    }

    @media (prefers-reduced-motion: reduce) {
      html { scroll-behavior: auto; }
    }

    body {
      margin: 0;
      background: var(--bg);
      color: var(--text);
      font-family: ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
      line-height: 1.65;
    }

    a {
      color: var(--blue);
      text-underline-offset: 0.18em;
    }

    a:focus-visible,
    summary:focus-visible,
    .button:focus-visible,
    .nav-mobile__toggle:focus-visible {
      outline: 3px solid var(--blue);
      outline-offset: 3px;
    }

    .skip-link {
      position: absolute;
      left: 12px;
      top: -48px;
      z-index: 100;
      padding: 10px 14px;
      border-radius: 8px;
      background: var(--text);
      color: var(--on-accent);
      font-weight: 700;
      text-decoration: none;
    }

    .skip-link:focus {
      top: 12px;
    }

    .container {
      width: min(1160px, calc(100% - 32px));
      margin-inline: auto;
    }

    .site-header {
      position: sticky;
      top: 0;
      z-index: 10;
      border-bottom: 1px solid var(--header-border);
      background: var(--header-bg);
      backdrop-filter: blur(12px);
    }

    .site-header__inner {
      display: flex;
      min-height: var(--header-h);
      align-items: center;
      justify-content: space-between;
      gap: 24px;
    }

    .brand {
      display: inline-flex;
      align-items: center;
      text-decoration: none;
      line-height: 1;
    }

    .brand-logo {
      display: block;
      width: clamp(176px, 22vw, 238px);
      height: auto;
    }

    .nav-desktop ul,
    .nav-mobile nav ul {
      display: flex;
      align-items: center;
      gap: 22px;
      margin: 0;
      padding: 0;
      list-style: none;
    }

    .nav-desktop a,
    .nav-mobile a {
      color: var(--muted);
      font-size: 0.94rem;
      font-weight: 650;
      text-decoration: none;
    }

    .nav-desktop a:hover,
    .nav-mobile a:hover { color: var(--text); }

    .nav-mobile { display: none; position: relative; }

    .nav-mobile__toggle {
      list-style: none;
      min-height: 44px;
      padding: 10px 14px;
      border: 1px solid var(--line);
      border-radius: 10px;
      background: var(--surface);
      color: var(--text);
      font-weight: 700;
      cursor: pointer;
    }

    .nav-mobile__toggle::-webkit-details-marker { display: none; }

    .nav-mobile nav {
      position: absolute;
      right: 0;
      top: calc(100% + 8px);
      min-width: 220px;
      padding: 12px;
      border: 1px solid var(--line);
      border-radius: 12px;
      background: var(--surface);
      box-shadow: var(--shadow-md);
    }

    .nav-mobile nav ul {
      flex-direction: column;
      align-items: stretch;
      gap: 4px;
    }

    .nav-mobile nav a {
      display: block;
      padding: 10px 12px;
      border-radius: 8px;
    }

    .nav-mobile nav a:hover { background: var(--bg); }

    main {
      width: min(var(--max), calc(100% - 32px));
      margin: 32px auto 48px;
      padding: clamp(24px, 5vw, 48px);
      border: 1px solid var(--line);
      border-radius: 18px;
      background: var(--surface);
      box-shadow: 0 12px 36px rgba(16, 24, 40, 0.05);
    }

    h1 {
      margin: 0;
      font-size: clamp(2rem, 5vw, 2.8rem);
      line-height: 1.08;
      letter-spacing: -0.04em;
    }

    .lead {
      margin: 16px 0 0;
      color: var(--text-body);
      font-size: 1.08rem;
    }

    .page-actions {
      display: flex;
      flex-wrap: wrap;
      gap: 12px;
      margin-top: 28px;
    }

    .button {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      min-height: 48px;
      padding: 0 20px;
      border: 1px solid var(--text);
      border-radius: 10px;
      font-weight: 800;
      text-decoration: none;
    }

    .button--primary {
      border-color: var(--accent);
      background: var(--accent);
      color: var(--on-accent);
    }

    .button--primary:hover {
      border-color: var(--accent-dark);
      background: var(--accent-dark);
    }

    .button--secondary {
      background: var(--surface);
      color: var(--text);
    }

    h2 {
      margin: 40px 0 12px;
      font-size: 1.35rem;
      letter-spacing: -0.02em;
    }

    p, li { color: var(--text-body); }

    ul { padding-left: 1.25rem; }

    li { margin: 8px 0; }

    table {
      width: 100%;
      border-collapse: collapse;
      margin: 16px 0;
      font-size: 0.92rem;
    }

    th,
    td {
      border: 1px solid var(--line);
      padding: 10px 12px;
      text-align: left;
      vertical-align: top;
    }

    th {
      background: var(--elevated);
    }

    code {
      font-size: 0.88em;
    }

    footer {
      padding: 34px 0 48px;
      border-top: 1px solid var(--line);
      background: var(--surface);
      color: var(--muted);
      font-size: 0.9rem;
    }

    .footer-inner {
      display: flex;
      justify-content: space-between;
      gap: 24px;
      align-items: center;
    }

    .footer-links {
      display: flex;
      flex-wrap: wrap;
      gap: 18px;
    }

    .footer-links a {
      color: var(--muted);
      text-decoration: none;
    }

    .footer-links a:hover { color: var(--text); }

    @media (max-width: 680px) {
      .nav-desktop { display: none; }
      .nav-mobile { display: block; }
      .footer-inner { flex-direction: column; align-items: flex-start; }
      table { display: block; overflow-x: auto; }
    }