body {
      margin: 0;
      min-height: 100vh;
      background: var(--tn-bg);
      color: var(--tn-text);
      font-family: var(--tn-font-body);
    }
    .doc-shell {
      width: min(920px, calc(100% - 32px));
      margin: 0 auto;
      padding: 48px 0 72px;
    }
    .doc-nav {
      display: flex;
      justify-content: space-between;
      align-items: center;
      gap: 16px;
      margin-bottom: 40px;
      flex-wrap: wrap;
    }
    .brand {
      color: var(--tn-text-on-dark);
      font-size: 1.15rem;
      font-weight: 800;
      letter-spacing: .02em;
      text-decoration: none;
    }
    .back-link {
      color: var(--tn-primary-light);
      text-decoration: none;
      font-weight: 700;
    }
    .doc-links {
      display: flex;
      align-items: center;
      gap: 14px;
      flex-wrap: wrap;
    }
    .doc-links a {
      color: var(--tn-text-sub);
      text-decoration: none;
      font-weight: 700;
      font-size: .92rem;
    }
    .doc-links a:hover {
      color: var(--tn-primary-light);
    }
    .doc-card {
      background: var(--tn-grad-card);
      border: 1px solid var(--tn-border);
      border-radius: var(--tn-radius-xl);
      padding: clamp(24px, 5vw, 48px);
      box-shadow: var(--tn-shadow-xl);
    }
    h1 {
      margin: 0 0 8px;
      color: var(--tn-text-on-dark);
      font-size: clamp(2rem, 5vw, 3rem);
      letter-spacing: 0;
    }
    .updated {
      margin: 0 0 32px;
      color: var(--tn-text-muted);
      font-size: .95rem;
    }
    h2 {
      margin: 32px 0 12px;
      color: var(--tn-text-on-dark);
      font-size: 1.2rem;
      letter-spacing: 0;
    }
    p, li {
      color: var(--tn-text);
      line-height: 1.9;
    }
    ul {
      padding-left: 1.25rem;
    }