:root {
      --accent: #d9531e;
      --link: #b44015;
      --ink: #111111;
      --text: #555555;
      --soft: #f7f6f4;
      --warm: #fdf3ee;
      --border: #e5e5e5;
    }
    * { box-sizing: border-box; }
    html { scroll-behavior: smooth; }
    body {
      margin: 0;
      background: #ffffff;
      color: var(--text);
      font-family: "Helvetica Neue", Helvetica, Arial, sans-serif;
      line-height: 1.85;
      -webkit-font-smoothing: antialiased;
    }
    .sda-shell { max-width: 900px; margin: auto; padding: 60px 24px 90px; }
    .sda-header { text-align: center; margin-bottom: 44px; }
    .sda-eyebrow {
      display: inline-block;
      margin-bottom: 12px;
      color: var(--link);
      font-size: 12px;
      font-weight: 700;
      letter-spacing: .13em;
      text-transform: uppercase;
    }
    h1 {
      margin: 0 0 16px;
      color: var(--ink);
      font-size: clamp(34px, 5vw, 48px);
      line-height: 1.2;
      font-weight: 800;
    }
    .sda-subtitle { max-width: 660px; margin: auto; font-size: 19px; }
    .sda-audience { font-size: 13px; margin: 18px 0 0; color: #707070; }
    h2 {
      color: var(--ink);
      font-size: clamp(24px, 3.2vw, 32px);
      line-height: 1.3;
      margin: 0 0 18px;
    }
    h3 { color: var(--ink); font-size: 19px; line-height: 1.4; margin: 26px 0 12px; }
    p { margin: 0 0 16px; }
    .sda-text { font-size: 18px; }
    a { color: var(--link); text-underline-offset: 4px; }
    a:hover { color: #802d0f; }
    a:focus-visible, summary:focus-visible { outline: 3px solid var(--accent); outline-offset: 5px; }
    .sda-toc { background: var(--soft); border-radius: 12px; padding: 28px 30px; margin: 36px 0 56px; }
    .sda-toc-title { color: var(--link); font-weight: 700; font-size: 12px; letter-spacing: .12em; text-transform: uppercase; }
    .sda-toc ol { columns: 2; column-gap: 32px; margin: 0; padding-left: 20px; }
    .sda-toc li { break-inside: avoid; font-size: 15px; margin-bottom: 10px; }
    .sda-toc a { color: #333333; text-decoration: none; }
    .sda-toc a:hover { text-decoration: underline; color: var(--link); }
    .sda-section { margin-bottom: 56px; scroll-margin-top: 24px; }
    .sda-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 20px; margin: 24px 0; }
    .sda-card { background: var(--soft); border-radius: 10px; padding: 24px; }
    .sda-card.accent { background: var(--warm); }
    .sda-card h3 { margin-top: 0; font-size: 18px; }
    .sda-card p, .sda-card li { font-size: 16px; }
    .sda-list { list-style: none; margin: 0 0 18px; padding: 0; }
    .sda-list li { padding-left: 25px; position: relative; margin-bottom: 10px; font-size: 17px; }
    .sda-list li::before { content: "—"; position: absolute; left: 0; color: var(--accent); font-weight: 700; }
    .sda-check li::before { content: "✓"; color: #2f7945; }
    .sda-steps { padding-left: 24px; font-size: 17px; }
    .sda-steps li { padding-left: 5px; margin-bottom: 14px; }
    .sda-steps li::marker { color: var(--link); font-weight: 700; }
    .sda-callout { padding: 20px 24px; margin: 26px 0; background: var(--warm); border-left: 4px solid var(--accent); border-radius: 4px; }
    .sda-callout-label { display: block; font-size: 12px; font-weight: 700; letter-spacing: .08em; text-transform: uppercase; color: var(--link); margin-bottom: 8px; }
    .sda-callout p { font-size: 17px; margin: 0; color: #3a3a3a; }
    .sda-related { font-size: 15px; margin-top: 22px; }
    .sda-faq details { border-bottom: 1px solid var(--border); padding: 20px 0; }
    .sda-faq summary { cursor: pointer; color: var(--link); font-size: 18px; font-weight: 700; }
    .sda-faq details p { margin: 14px 0 0; font-size: 17px; }
    .sda-help { padding: 28px; border: 1px solid var(--border); border-radius: 12px; }
    .sda-help a { overflow-wrap: anywhere; }
    footer { border-top: 1px solid var(--border); margin-top: 56px; padding-top: 24px; text-align: center; color: #777777; font-size: 13px; }
    @media (max-width: 700px) {
      .sda-grid { grid-template-columns: 1fr; }
      .sda-toc ol { columns: 1; }
    }
    @media (max-width: 560px) {
      .sda-shell { padding: 40px 18px 70px; }
      .sda-toc { padding: 24px; }
    }
    @media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }