:root {
  --canvas: #f3f4f6;
  --surface: #ffffff;
  --ink: #23282d;
  --accent: #8a1c3b;
  --rule: #d6dae0;
  --dark: #1f2933;
  --muted: #5c6771;
}
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--canvas);
  color: var(--ink);
  font-family: Arial, "Helvetica Neue", Helvetica, sans-serif;
  font-size: 1rem;
  line-height: 1.65;
}
h1, h2, h3, h4 {
  font-family: "Trebuchet MS", "Segoe UI", Tahoma, sans-serif;
  font-weight: 700;
  line-height: 1.18;
  margin: 0 0 12px;
}
p { margin: 0 0 16px; }
a { color: var(--accent); text-decoration: underline; }
a:focus-visible, button:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
img, svg { max-width: 100%; }
.shell { width: min(1240px, 100% - 48px); margin-inline: auto; }
.util-label {
  font-family: "Arial Narrow", Arial, sans-serif;
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

/* ---- utility strip ---- */
.util-strip { background: var(--dark); color: #cfd6dc; }
.util-strip .shell { display: flex; justify-content: space-between; align-items: center; gap: 24px; min-height: 40px; flex-wrap: wrap; }
.util-strip a { color: #eef1f4; text-decoration: none; }
.util-strip a:hover { text-decoration: underline; }
.util-strip nav ul { display: flex; gap: 24px; list-style: none; margin: 0; padding: 0; }
.util-mark { font-weight: 700; color: #ffffff; letter-spacing: 0.1em; }

/* ---- header ---- */
.site-head { background: var(--surface); border-bottom: 1px solid var(--rule); }
.site-head .shell { display: flex; align-items: center; justify-content: space-between; gap: 32px; min-height: 84px; flex-wrap: wrap; }
.wordmark { display: flex; flex-direction: column; gap: 4px; text-decoration: none; color: var(--ink); }
.wordmark strong { font-family: "Trebuchet MS", "Segoe UI", Tahoma, sans-serif; font-size: 1.875rem; letter-spacing: 0.02em; }
.wordmark .rule { display: block; height: 3px; width: 120px; background: var(--rule); }
.wordmark .rule i { display: block; height: 3px; width: 34px; background: var(--accent); }
.mainnav ul { display: flex; flex-wrap: wrap; gap: 4px 20px; list-style: none; margin: 0; padding: 0; }
.mainnav a {
  display: inline-block; padding: 8px 4px; color: var(--ink); text-decoration: none;
  font-size: 0.9375rem; border-bottom: 3px solid transparent;
}
.mainnav a:hover { border-bottom-color: var(--rule); }
.mainnav a[aria-current="page"] { border-bottom-color: var(--accent); }

/* ---- banner ---- */
.banner { background: var(--dark); position: relative; }
.banner .shell { display: grid; grid-template-columns: minmax(0, 3fr) minmax(0, 2fr); align-items: center; gap: 48px; padding: 32px 0; }
.banner-art { grid-column: 1; }
.banner-art img { display: block; width: 100%; height: auto; }
.banner-copy { background: var(--surface); padding: 32px; border-top: 4px solid var(--accent); }
.banner-copy h1 { font-size: 2.875rem; margin-bottom: 12px; }
.banner-copy p { margin: 0; color: var(--muted); font-size: 1.0625rem; }

/* ---- overview ---- */
.overview { background: var(--surface); border-bottom: 1px solid var(--rule); }
.overview .shell { display: grid; grid-template-columns: minmax(0, 3fr) minmax(0, 2fr); gap: 48px; padding: 48px 0; }
.overview .prose { max-width: 68ch; }
.overview h2 { font-size: 1.75rem; }
.fact-strip { border-top: 3px solid var(--accent); padding-top: 16px; }
.fact-strip h3 { font-size: 1.125rem; }
.fact-strip ul { list-style: none; margin: 0 0 24px; padding: 0; }
.fact-strip li { border-bottom: 1px solid var(--rule); padding: 8px 0; }

/* ---- capability rows ---- */
.cap-rows { padding: 48px 0; }
.cap-rows > .shell > h2 { font-size: 1.75rem; margin-bottom: 24px; }
.cap-row {
  display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: 48px; align-items: center; padding: 32px 0; border-top: 1px solid var(--rule);
}
.cap-row .art { grid-column: 1; grid-row: 1; }
.cap-row .text { grid-column: 2; grid-row: 1; }
.cap-row:nth-of-type(even) .art { grid-column: 2; }
.cap-row:nth-of-type(even) .text { grid-column: 1; }
.cap-row h3 { font-size: 1.625rem; }
.cap-row p { max-width: 46ch; color: #333c44; }
.cap-row .terms {
  border-top: 3px solid var(--accent); padding-top: 8px; margin-top: 16px;
  font-family: "Arial Narrow", Arial, sans-serif; text-transform: uppercase;
  letter-spacing: 0.08em; font-size: 0.75rem; color: var(--muted);
}
.cap-row .art img { display: block; width: 100%; height: auto; border: 1px solid var(--rule); }

/* ---- ledger ---- */
.ledger-band { background: var(--surface); border-top: 1px solid var(--rule); border-bottom: 1px solid var(--rule); padding: 48px 0; }
.ledger-band h2 { font-size: 1.75rem; }
table.ledger { width: 100%; border-collapse: collapse; margin-top: 16px; }
table.ledger caption { text-align: left; color: var(--muted); padding-bottom: 12px; }
table.ledger th, table.ledger td { text-align: left; padding: 12px 16px 12px 0; border-bottom: 1px solid var(--rule); vertical-align: top; }
table.ledger thead th {
  font-family: "Arial Narrow", Arial, sans-serif; text-transform: uppercase;
  letter-spacing: 0.08em; font-size: 0.75rem; color: var(--muted); border-bottom: 3px solid var(--accent);
}
table.ledger td.topic { white-space: nowrap; }
table.ledger td.topic span { border-bottom: 3px solid var(--accent); padding-bottom: 2px; }

/* ---- split band ---- */
.band-split { background: var(--dark); color: #dfe5ea; padding: 48px 0; }
.band-split .shell { display: grid; grid-template-columns: minmax(0, 3fr) minmax(0, 2fr); gap: 48px; }
.band-split h2, .band-split h3 { color: #ffffff; }
.band-split a { color: #f0c8d3; }
.band-split .update { border-top: 1px solid #3d4b57; padding: 16px 0; }
.band-split .update h3 { font-size: 1.125rem; margin-bottom: 4px; }
.band-split .update p { margin: 0; color: #c3ccd4; }

/* ---- footer ---- */
.site-foot { background: #16202a; color: #c3ccd4; padding: 48px 0 24px; }
.site-foot .cols { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 32px; }
.site-foot h2 {
  font-family: "Arial Narrow", Arial, sans-serif; text-transform: uppercase; letter-spacing: 0.08em;
  font-size: 0.75rem; color: #ffffff; border-bottom: 3px solid var(--accent);
  padding-bottom: 8px; margin-bottom: 12px;
}
.site-foot ul { list-style: none; margin: 0; padding: 0; }
.site-foot li { padding: 4px 0; }
.site-foot a { color: #e7ecf0; text-decoration: none; }
.site-foot a:hover { text-decoration: underline; }
.site-foot .legal { border-top: 1px solid #2c3742; margin-top: 32px; padding-top: 16px; color: #93a0aa; }

/* ---- inner pages ---- */
.title-band { background: var(--surface); border-bottom: 1px solid var(--rule); padding: 32px 0; }
.title-band .shell { border-left: 6px solid var(--accent); padding-left: 24px; }
.title-band h1 { font-size: 2.25rem; }
.title-band p { margin: 0; color: var(--muted); max-width: 68ch; }
.page-body { padding: 48px 0; }
.page-body .shell { display: grid; grid-template-columns: minmax(0, 720px) minmax(0, 260px); gap: 48px; align-items: start; }
.read-col { background: var(--surface); padding: 32px; border: 1px solid var(--rule); }
.read-col h2 { font-size: 1.5rem; margin-top: 32px; }
.read-col h2:first-of-type { margin-top: 0; }
.read-col ul, .read-col ol { margin: 0 0 16px; padding-left: 24px; }
.read-col li { margin-bottom: 8px; }
.facts-rail { background: var(--surface); border: 1px solid var(--rule); border-top: 3px solid var(--accent); padding: 24px; }
.facts-rail h2 { font-size: 1.0625rem; }
.facts-rail ul { list-style: none; margin: 0; padding: 0; }
.facts-rail li { border-bottom: 1px solid var(--rule); padding: 8px 0; font-size: 0.9375rem; }
.related { border-top: 3px solid var(--accent); margin-top: 32px; padding-top: 16px; }
.related ul { list-style: none; display: flex; flex-wrap: wrap; gap: 24px; margin: 0; padding: 0; }
.defs { columns: 2; column-gap: 48px; }
.defs > div { break-inside: avoid; margin-bottom: 24px; }
.defs dt { font-weight: 700; border-bottom: 3px solid var(--accent); display: inline-block; }
.defs dd { margin: 8px 0 0; }

@media (max-width: 1080px) {
  .shell { width: min(1240px, 100% - 32px); }
  .banner-copy h1 { font-size: 2.25rem; }
}
@media (max-width: 760px) {
  .banner .shell, .overview .shell, .band-split .shell, .page-body .shell { grid-template-columns: minmax(0, 1fr); gap: 24px; }
  .banner-art { grid-column: 1; }
  .cap-row { grid-template-columns: minmax(0, 1fr); gap: 16px; }
  .cap-row .art, .cap-row .text,
  .cap-row:nth-of-type(even) .art, .cap-row:nth-of-type(even) .text { grid-column: 1; grid-row: auto; }
  .cap-row .text { order: -1; }
  .site-foot .cols { grid-template-columns: minmax(0, 1fr); }
  .defs { columns: 1; }
  table.ledger thead { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); }
  table.ledger tr { display: block; border-bottom: 1px solid var(--rule); padding: 12px 0; }
  table.ledger td { display: block; border: 0; padding: 4px 0; }
  table.ledger td::before {
    content: attr(data-label); display: block;
    font-family: "Arial Narrow", Arial, sans-serif; text-transform: uppercase;
    letter-spacing: 0.08em; font-size: 0.6875rem; color: var(--muted);
  }
}
@media (max-width: 480px) {
  .util-strip nav { display: none; }
  .banner-copy { padding: 24px; }
  .banner-copy h1 { font-size: 1.75rem; }
  .read-col { padding: 20px; }
}
@media (prefers-reduced-motion: reduce) {
  * { transition: none !important; }
}