:root {
      --ink: #172026;
      --muted: #5d6870;
      --line: #d8e0e5;
      --soft: #f4f7f8;
      --brand: #0f766e;
      --brand-dark: #0b4f4a;
      --accent: #bf5f37;
      --paper: #ffffff;
    }

    * {
      box-sizing: border-box;
    }

    body {
      margin: 0;
      font-family: Arial, Helvetica, sans-serif;
      color: var(--ink);
      background: var(--paper);
      line-height: 1.65;
    }

    a {
      color: var(--brand-dark);
      text-decoration-thickness: 2px;
      text-underline-offset: 3px;
    }

    .topbar {
      border-bottom: 1px solid var(--line);
      background: #fff;
    }

    .topbar-inner {
      width: min(1120px, calc(100% - 32px));
      margin: 0 auto;
      padding: 16px 0;
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 20px;
    }

    .brand {
      font-size: 18px;
      font-weight: 700;
      letter-spacing: 0;
      color: var(--ink);
      text-decoration: none;
    }

    .nav-link {
      font-size: 14px;
      font-weight: 700;
      color: var(--brand-dark);
    }

    .hero {
      background: linear-gradient(180deg, #eef7f5 0%, #ffffff 100%);
      border-bottom: 1px solid var(--line);
    }

    .hero-inner {
      width: min(1120px, calc(100% - 32px));
      margin: 0 auto;
      padding: 54px 0 38px;
      display: grid;
      grid-template-columns: minmax(0, 1fr) 330px;
      gap: 42px;
      align-items: end;
    }

    .eyebrow {
      margin: 0 0 12px;
      color: var(--accent);
      font-size: 13px;
      font-weight: 700;
      text-transform: uppercase;
      letter-spacing: .08em;
    }

    h1 {
      margin: 0;
      font-size: clamp(34px, 5vw, 58px);
      line-height: 1.05;
      letter-spacing: 0;
      max-width: 900px;
    }

    .dek {
      margin: 22px 0 0;
      max-width: 760px;
      font-size: 19px;
      color: var(--muted);
    }

    .hero-panel {
      border: 1px solid var(--line);
      border-radius: 8px;
      background: #fff;
      padding: 22px;
    }

    .hero-panel strong {
      display: block;
      margin-bottom: 8px;
      font-size: 15px;
    }

    .hero-panel p {
      margin: 0 0 16px;
      color: var(--muted);
      font-size: 14px;
    }

    .button {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      min-height: 44px;
      padding: 10px 16px;
      border-radius: 6px;
      background: var(--brand);
      color: #fff;
      font-weight: 700;
      text-decoration: none;
    }

    .layout {
      width: min(1120px, calc(100% - 32px));
      margin: 0 auto;
      padding: 44px 0 70px;
      display: grid;
      grid-template-columns: minmax(0, 1fr) 300px;
      gap: 44px;
    }

    article {
      min-width: 0;
    }

    .meta {
      display: flex;
      flex-wrap: wrap;
      gap: 10px 18px;
      margin-bottom: 26px;
      color: var(--muted);
      font-size: 14px;
    }

    h2 {
      margin: 42px 0 14px;
      font-size: 28px;
      line-height: 1.2;
      letter-spacing: 0;
    }

    h3 {
      margin: 28px 0 8px;
      font-size: 20px;
      line-height: 1.3;
      letter-spacing: 0;
    }

    p {
      margin: 0 0 16px;
    }

    .intro {
      font-size: 18px;
    }

    .toc,
    .note,
    .sidebar-box {
      border: 1px solid var(--line);
      border-radius: 8px;
      background: var(--soft);
      padding: 20px;
    }

    .toc {
      margin: 28px 0 34px;
    }

    .toc h2,
    .sidebar-box h2 {
      margin-top: 0;
      font-size: 20px;
    }

    .toc ol {
      columns: 2;
      column-gap: 34px;
      margin: 0;
      padding-left: 22px;
    }

    .toc li {
      break-inside: avoid;
      margin-bottom: 8px;
    }

    .faq-item {
      padding: 24px 0;
      border-top: 1px solid var(--line);
    }

    .faq-item:first-of-type {
      border-top: 0;
    }

    .faq-item h3 {
      margin-top: 0;
    }

    .key-takeaway {
      margin: 34px 0;
      padding: 24px;
      border-left: 5px solid var(--brand);
      background: #eef7f5;
    }

    .table-wrap {
      overflow-x: auto;
      margin: 22px 0;
      border: 1px solid var(--line);
      border-radius: 8px;
    }

    table {
      width: 100%;
      border-collapse: collapse;
      min-width: 680px;
      background: #fff;
    }

    th,
    td {
      padding: 13px 14px;
      border-bottom: 1px solid var(--line);
      text-align: left;
      vertical-align: top;
    }

    th {
      background: #edf3f3;
      font-size: 14px;
    }

    tr:last-child td {
      border-bottom: 0;
    }

    .sidebar {
      position: sticky;
      top: 24px;
      align-self: start;
    }

    .sidebar-box {
      background: #fff;
      margin-bottom: 18px;
    }

    .sidebar-box ul {
      margin: 0;
      padding-left: 20px;
    }

    .sidebar-box li {
      margin-bottom: 8px;
    }

    .cta {
      margin-top: 44px;
      padding: 30px;
      border-radius: 8px;
      background: #143c39;
      color: #fff;
    }

    .cta h2 {
      margin-top: 0;
      color: #fff;
    }

    .cta p {
      color: #dbe9e7;
    }

    .cta .button {
      background: #fff;
      color: #143c39;
    }

    footer {
      border-top: 1px solid var(--line);
      padding: 24px 0;
      color: var(--muted);
      font-size: 14px;
    }

    .footer-inner {
      width: min(1120px, calc(100% - 32px));
      margin: 0 auto;
    }

    @media (max-width: 860px) {
      .hero-inner,
      .layout {
        grid-template-columns: 1fr;
      }

      .hero-inner {
        padding-top: 38px;
      }

      .sidebar {
        position: static;
      }

      .toc ol {
        columns: 1;
      }
    }

    @media (max-width: 520px) {
      .topbar-inner {
        align-items: flex-start;
        flex-direction: column;
      }

      h1 {
        font-size: 34px;
      }

      .dek,
      .intro {
        font-size: 16px;
      }
    }