:root {
    --paper: #fafafb;
    --surface: #ffffff;
    --ink: #17161a;
    --ink-soft: #55525c;
    --ink-faint: #7d7a85;
    --rule: #e3e1e6;
    --accent: #dc2626;
    --accent-soft: #fdeeee;
    --font-display: ui-sans-serif, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", sans-serif;
    --font-body: Georgia, "Iowan Old Style", "Times New Roman", serif;
    --measure: 66ch;
  }

  @media (prefers-color-scheme: dark) {
    :root {
      --paper: #131215;
      --surface: #1b1a1f;
      --ink: #ecebef;
      --ink-soft: #a9a6b1;
      --ink-faint: #837f8b;
      --rule: #2e2c33;
      --accent: #f47070;
      --accent-soft: #2a1a1c;
    }
  }

  :root[data-theme="dark"] {
    --paper: #131215;
    --surface: #1b1a1f;
    --ink: #ecebef;
    --ink-soft: #a9a6b1;
    --ink-faint: #837f8b;
    --rule: #2e2c33;
    --accent: #f47070;
    --accent-soft: #2a1a1c;
  }

  :root[data-theme="light"] {
    --paper: #fafafb;
    --surface: #ffffff;
    --ink: #17161a;
    --ink-soft: #55525c;
    --ink-faint: #7d7a85;
    --rule: #e3e1e6;
    --accent: #dc2626;
    --accent-soft: #fdeeee;
  }

  * { box-sizing: border-box; }

  .page {
    background: var(--paper);
    color: var(--ink);
    font-family: var(--font-body);
    font-size: 1.0625rem;
    line-height: 1.7;
    min-height: 100vh;
    padding: clamp(2rem, 6vw, 5rem) clamp(1.25rem, 5vw, 2rem) 5rem;
  }

  .wrap {
    margin: 0 auto;
    max-width: var(--measure);
    display: flex;
    flex-direction: column;
    gap: 3rem;
  }

  /* --- Header ------------------------------------------------------------ */
  .masthead {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    border-top: 3px solid var(--accent);
    padding-top: 1.5rem;
  }

  .eyebrow {
    font-family: var(--font-display);
    font-size: 0.6875rem;
    font-weight: 600;
    letter-spacing: 0.14em;
    text-transform: uppercase;
    color: var(--accent);
  }

  h1 {
    font-family: var(--font-display);
    font-size: clamp(1.85rem, 5vw, 2.6rem);
    font-weight: 700;
    letter-spacing: -0.022em;
    line-height: 1.1;
    margin: 0;
    text-wrap: balance;
  }

  .meta {
    font-family: var(--font-display);
    font-size: 0.875rem;
    color: var(--ink-soft);
    display: flex;
    flex-wrap: wrap;
    gap: 0.4rem 1.25rem;
    margin: 0;
    padding: 0;
    list-style: none;
  }

  .meta strong { color: var(--ink); font-weight: 600; }

  .lede {
    font-size: 1.1875rem;
    line-height: 1.65;
    color: var(--ink-soft);
    margin: 0;
  }

  /* --- Table of contents ------------------------------------------------ */
  nav.toc {
    background: var(--surface);
    border: 1px solid var(--rule);
    border-radius: 4px;
    padding: 1.25rem 1.5rem;
  }

  nav.toc h2 {
    font-family: var(--font-display);
    font-size: 0.6875rem;
    font-weight: 600;
    letter-spacing: 0.14em;
    text-transform: uppercase;
    color: var(--ink-faint);
    margin: 0 0 0.75rem;
  }

  nav.toc ol {
    font-family: var(--font-display);
    font-size: 0.9375rem;
    margin: 0;
    padding-left: 1.4rem;
    display: grid;
    gap: 0.3rem;
  }

  nav.toc a { color: var(--ink); text-decoration: none; border-bottom: 1px solid transparent; }
  nav.toc a:hover { border-bottom-color: var(--accent); }

  /* --- Sections --------------------------------------------------------- */
  .body { display: flex; flex-direction: column; gap: 2.75rem; }

  section { display: flex; flex-direction: column; gap: 0.9rem; }

  h2.head {
    font-family: var(--font-display);
    font-size: 1.1875rem;
    font-weight: 650;
    letter-spacing: -0.012em;
    line-height: 1.3;
    margin: 0;
    display: flex;
    gap: 0.7rem;
    align-items: baseline;
    text-wrap: balance;
  }

  h2.head .num {
    color: var(--accent);
    font-variant-numeric: tabular-nums;
    font-size: 0.875rem;
    font-weight: 600;
    flex: none;
    padding-top: 0.15em;
  }

  p { margin: 0; }

  ul.plain { margin: 0; padding-left: 1.3rem; display: grid; gap: 0.45rem; }

  a { color: var(--accent); text-decoration: underline; text-underline-offset: 2px; }

  a:focus-visible,
  nav.toc a:focus-visible {
    outline: 2px solid var(--accent);
    outline-offset: 3px;
    border-radius: 2px;
  }

  /* --- Tables ----------------------------------------------------------- */
  .scroller {
    overflow-x: auto;
    border: 1px solid var(--rule);
    border-radius: 4px;
    background: var(--surface);
  }

  table {
    border-collapse: collapse;
    font-family: var(--font-display);
    font-size: 0.875rem;
    line-height: 1.5;
    min-width: 34rem;
    width: 100%;
  }

  th, td {
    text-align: left;
    padding: 0.7rem 0.9rem;
    vertical-align: top;
    border-bottom: 1px solid var(--rule);
  }

  thead th {
    font-size: 0.6875rem;
    font-weight: 600;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--ink-faint);
    white-space: nowrap;
  }

  tbody tr:last-child td { border-bottom: none; }
  tbody th { font-weight: 600; color: var(--ink); }

  .note {
    background: var(--accent-soft);
    border-left: 3px solid var(--accent);
    padding: 0.9rem 1.1rem;
    font-size: 1rem;
  }

  /* --- Footer ----------------------------------------------------------- */
  footer {
    border-top: 1px solid var(--rule);
    padding-top: 1.5rem;
    font-family: var(--font-display);
    font-size: 0.875rem;
    color: var(--ink-soft);
    display: flex;
    flex-direction: column;
    gap: 0.4rem;
  }

  /* --- Additions for the standalone site -------------------------------- */
  html { -webkit-text-size-adjust: 100%; }

  body {
    margin: 0;
    background: var(--paper);
    color: var(--ink);
  }

  .topnav {
    font-family: var(--font-display);
    font-size: 0.875rem;
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem 1.25rem;
    align-items: baseline;
    border-bottom: 1px solid var(--rule);
    padding-bottom: 1rem;
    margin-bottom: -1rem;
  }

  .topnav a {
    color: var(--ink-soft);
    text-decoration: none;
    border-bottom: 1px solid transparent;
  }

  .topnav a:hover { color: var(--ink); border-bottom-color: var(--accent); }
  .topnav a[aria-current="page"] { color: var(--ink); font-weight: 600; }

  .topnav .brand {
    color: var(--accent);
    font-weight: 600;
    letter-spacing: 0.02em;
    margin-right: auto;
  }

  .cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(15rem, 1fr));
    gap: 1rem;
    list-style: none;
    margin: 0;
    padding: 0;
  }

  .card {
    background: var(--surface);
    border: 1px solid var(--rule);
    border-radius: 4px;
    padding: 1.1rem 1.25rem;
    display: flex;
    flex-direction: column;
    gap: 0.35rem;
  }

  .card a {
    font-family: var(--font-display);
    font-size: 1rem;
    font-weight: 650;
    color: var(--ink);
    text-decoration: none;
    border-bottom: 1px solid var(--rule);
    align-self: start;
  }

  .card a:hover { border-bottom-color: var(--accent); color: var(--accent); }

  .card p {
    font-family: var(--font-display);
    font-size: 0.875rem;
    line-height: 1.5;
    color: var(--ink-soft);
  }

  dl.facts {
    font-family: var(--font-display);
    font-size: 0.9375rem;
    display: grid;
    grid-template-columns: minmax(8rem, auto) 1fr;
    gap: 0.5rem 1.25rem;
    margin: 0;
    align-items: baseline;
  }

  dl.facts dt { color: var(--ink-faint); font-size: 0.8125rem; text-transform: uppercase; letter-spacing: 0.08em; }
  dl.facts dd { margin: 0; }

  ol.steps {
    font-family: var(--font-display);
    font-size: 0.9375rem;
    line-height: 1.6;
    margin: 0;
    padding-left: 1.4rem;
    display: grid;
    gap: 0.6rem;
  }

  @media (max-width: 30rem) {
    dl.facts { grid-template-columns: 1fr; gap: 0.15rem; }
    dl.facts dd { margin-bottom: 0.6rem; }
  }