.i59 {
  --i59-red: #c62f22;
  --i59-green: #2e765c;
  --i59-ink: var(--ink);
  --i59-paper: var(--surface);
  width: min(100%, 1440px);
  margin: 0 auto;
  padding-bottom: 7rem;
  background: var(--page);
  color: var(--i59-ink);
}

.i59-view-nav {
  position: sticky;
  top: 64px;
  z-index: 12;
  display: flex;
  justify-content: center;
  gap: 0;
  border-bottom: 1px solid var(--line);
  background: color-mix(in srgb, var(--surface), transparent 4%);
  backdrop-filter: blur(16px);
  scrollbar-width: none;
}
.i59-view-nav::-webkit-scrollbar { display: none; }

.i59-view-nav a {
  padding: .8rem 1.1rem;
  color: var(--muted);
  font-size: .72rem;
  font-weight: 800;
  letter-spacing: .08em;
  text-decoration: none;
  text-transform: uppercase;
}

.i59-view-nav a[aria-current="page"] {
  color: var(--i59-red);
  box-shadow: inset 0 -3px 0 var(--i59-red);
}

.i59-view-tools { display: inline-flex; align-items: center; gap: .45rem; margin-left: 1rem; }
.i59-view-tools button { border: 1px solid var(--line); border-radius: 999px; padding: .35rem .65rem; background: var(--surface); color: var(--muted); font-size: .68rem; font-weight: 750; cursor: pointer; }
.i59-view-tools button:hover,
.i59-view-tools button:focus-visible { border-color: var(--i59-red); color: var(--i59-red); }
.i59-progress { width: 72px; height: 4px; overflow: hidden; background: var(--line); }
.i59-progress i { display: block; width: 0; height: 100%; background: var(--i59-red); }

.i59-hero {
  width: min(calc(100% - 3rem), 1260px);
  margin: 0 auto;
  padding: clamp(4rem, 9vw, 8rem) 0 2rem;
  display: grid;
  grid-template-columns: minmax(0, 1fr) 220px;
  gap: 3rem;
  align-items: end;
  border-bottom: 4px solid var(--i59-ink);
}

.i59-eyebrow,
.i59-hero aside span,
.i59-module > div > span,
.i59-chooser header > span {
  display: block;
  color: var(--i59-red);
  font-size: .7rem;
  font-weight: 850;
  letter-spacing: .14em;
  text-transform: uppercase;
}

.i59-hero h1 {
  max-width: 960px;
  margin: 1rem 0 1.25rem;
  font-size: clamp(3.3rem, 8vw, 7.7rem);
  line-height: .88;
  letter-spacing: -.068em;
}

.i59-hero > div > p {
  max-width: 820px;
  margin: 0;
  font-size: clamp(1.15rem, 2.2vw, 1.55rem);
  font-weight: 650;
}

.i59-hero aside {
  padding: 1.2rem;
  border: 1px solid var(--line);
  border-top: 4px solid var(--i59-green);
  background: var(--i59-paper);
}

.i59-hero aside strong,
.i59-hero aside small { display: block; }
.i59-hero aside strong { margin: .5rem 0; font-size: .85rem; letter-spacing: .08em; }
.i59-hero aside small { color: var(--muted); }

.i59-deck {
  width: min(calc(100% - 3rem), 1260px);
  margin: 0 auto;
  padding: 1.5rem 0 3rem;
  display: flex;
  justify-content: space-between;
  gap: 2rem;
  color: var(--muted);
}

.i59-deck p { max-width: 760px; margin: 0; font-size: 1.05rem; }
.i59-deck span { flex: none; font-size: .78rem; }

.i59-summary {
  width: min(calc(100% - 3rem), 800px);
  margin: 0 auto 3rem;
  padding: 1rem 1.2rem;
  border: 1px solid var(--line);
  border-left: 4px solid var(--i59-red);
  background: var(--surface);
}
.i59-summary summary,
.i59-contract summary { cursor: pointer; font-size: .75rem; font-weight: 850; letter-spacing: .08em; text-transform: uppercase; }
.i59-summary p { margin: 1rem 0 0; color: var(--muted); }

.i59-layout {
  width: min(calc(100% - 3rem), 1260px);
  margin: 0 auto;
  display: grid;
  grid-template-columns: 220px minmax(0, 800px);
  gap: clamp(2rem, 5vw, 5rem);
  align-items: start;
}

.i59-rail {
  position: sticky;
  top: 126px;
  max-height: calc(100vh - 150px);
  overflow: auto;
  border-top: 4px solid var(--i59-ink);
}

.i59-rail > div {
  display: flex;
  justify-content: space-between;
  padding: .8rem 0;
  color: var(--muted);
  font-size: .68rem;
  letter-spacing: .1em;
  text-transform: uppercase;
}

.i59-rail a {
  display: grid;
  grid-template-columns: 2rem 1fr;
  gap: .5rem;
  padding: .65rem 0;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: .74rem;
  line-height: 1.25;
  text-decoration: none;
}

.i59-rail a:hover { color: var(--i59-red); }
.i59-rail a span { color: var(--i59-red); font-weight: 850; }

.i59-article { min-width: 0; counter-reset: i59-section; }
.i59-section { position: relative; padding: 3.3rem 0; border-top: 1px solid var(--line); scroll-margin-top: 145px; }
.i59-section:first-child { border-top: 4px solid var(--i59-red); }
.i59-section h2 { margin: 0 0 2rem; font-size: clamp(2rem, 4vw, 3.7rem); line-height: .98; letter-spacing: -.048em; }
.i59-section h2 > span { display: block; margin-bottom: .8rem; color: var(--i59-red); font-size: .72rem; letter-spacing: .14em; }
.i59-section h3 { margin: 2rem 0 .6rem; font-size: 1.3rem; }
.i59-section p,
.i59-section li { font-family: Georgia, "Times New Roman", serif; font-size: clamp(1.05rem, 1.4vw, 1.18rem); }
.i59-section p { margin: 0 0 1.15rem; }
.i59-section ul,
.i59-section ol { padding-left: 1.4rem; }
.i59-section li + li { margin-top: .65rem; }
.i59-section blockquote { margin: 2.5rem 0; padding: 1.25rem 0 1.25rem 1.6rem; border-left: 5px solid var(--i59-red); font-size: clamp(1.45rem, 3vw, 2.35rem); font-weight: 780; line-height: 1.15; letter-spacing: -.035em; }
.i59-section a { color: var(--i59-red); }
.sp-reference-anchor { display: block; position: relative; top: -140px; visibility: hidden; }

.i59-module {
  margin: 2.8rem 0 .5rem;
  padding: 1.5rem;
  border: 1px solid var(--line);
  border-top: 5px solid var(--i59-red);
  background: var(--surface-2);
}

.i59-module h3 { margin: .45rem 0; font-size: 1.55rem; }
.i59-contract summary span,
.i59-contract summary strong { display: block; }
.i59-contract summary span { color: var(--i59-red); font-size: .68rem; }
.i59-contract summary strong { margin-top: .35rem; font-size: 1.35rem; letter-spacing: -.02em; text-transform: none; }
.i59-module > div > p { color: var(--muted); font-family: inherit; font-size: .92rem; }
.i59-module ol { margin: 1.4rem 0 0; padding: 0; list-style: none; }
.i59-contract li,
.i59-scorecard li,
.i59-ladder li { display: grid; grid-template-columns: 2.4rem 1fr; gap: .8rem; padding: .85rem 0; border-top: 1px solid var(--line); }
.i59-contract li > span,
.i59-scorecard li > span,
.i59-ladder li > span { color: var(--i59-red); font: 850 .72rem/1.4 Inter, sans-serif; letter-spacing: .1em; }
.i59-contract li strong,
.i59-scorecard li strong,
.i59-ladder li strong { font-family: Inter, sans-serif; font-size: .94rem; }
.i59-contract li p,
.i59-ladder li p { margin: .2rem 0 0; font-size: .94rem; }
.i59-ladder li small { display: block; margin-top: .25rem; color: var(--muted); }
.i59-ladder li:nth-child(n+4) > span { color: var(--i59-green); }
.i59-scorecard ol { display: grid; grid-template-columns: 1fr 1fr; }
.i59-scorecard li:nth-child(odd) { padding-right: 1rem; }

.i59-dual-key {
  width: min(calc(100% - 3rem), 1260px);
  margin: 0 auto 3rem;
  display: grid;
  grid-template-columns: 1fr 1fr;
  border: 1px solid var(--line);
}

.i59-dual-key div { padding: 1.4rem; background: var(--surface); }
.i59-dual-key div + div { border-left: 1px solid var(--line); }
.i59-dual-key span,
.i59-dual-key strong { display: block; }
.i59-dual-key span { margin-bottom: .5rem; color: var(--i59-red); font-size: .7rem; font-weight: 850; letter-spacing: .12em; text-transform: uppercase; }

.i59--worker-and-machine .i59-layout { grid-template-columns: 180px minmax(0, 1fr); }
.i59--worker-and-machine .i59-article { display: grid; grid-template-columns: 1fr 1fr; gap: 0 2rem; }
.i59--worker-and-machine .i59-section { padding: 2rem; border: 1px solid var(--line); border-top-width: 4px; background: var(--surface); }
.i59--worker-and-machine .i59-section--worker { grid-column: 1; border-top-color: var(--i59-red); }
.i59--worker-and-machine .i59-section--machine { grid-column: 2; border-top-color: var(--i59-ink); }
.i59--worker-and-machine .i59-section--convergence { grid-column: 1 / -1; border-top-color: var(--i59-green); }
.i59--worker-and-machine .i59-section h2 { font-size: clamp(1.7rem, 2.7vw, 2.6rem); }
.i59--worker-and-machine .i59-section p,
.i59--worker-and-machine .i59-section li { font-size: 1rem; }

.i59--promotion-ladder > .i59-ladder {
  width: min(calc(100% - 3rem), 1260px);
  margin: 0 auto 3rem;
}
.i59--promotion-ladder > .i59-ladder ol { display: grid; grid-template-columns: repeat(5, 1fr); }
.i59--promotion-ladder > .i59-ladder li { display: block; padding: 1rem; border: 0; border-left: 1px solid var(--line); }
.i59--promotion-ladder > .i59-ladder li:first-child { border-left: 0; }

.i59-support { width: min(calc(100% - 3rem), 1100px); margin: 4rem auto 0; }
.i59-support .sp-evidence,
.i59-support .sp-connected { width: 100%; }

.i59-chooser { min-height: 75vh; padding: 0 0 6rem; }
.i59-chooser > header,
.i59-chooser > div { width: min(calc(100% - 3rem), 1100px); margin-inline: auto; }
.i59-chooser > header { padding: clamp(4rem, 9vw, 8rem) 0 2.5rem; border-bottom: 4px solid var(--ink); }
.i59-chooser h1 { max-width: 900px; margin: 1rem 0; font-size: clamp(3rem, 7vw, 6.5rem); line-height: .92; letter-spacing: -.06em; }
.i59-chooser header p { max-width: 760px; color: var(--muted); font-size: 1.1rem; }
.i59-chooser > div { display: grid; grid-template-columns: repeat(3, 1fr); }
.i59-chooser > div > a { min-height: 340px; padding: 2rem; border-bottom: 1px solid var(--line); border-left: 1px solid var(--line); text-decoration: none; }
.i59-chooser > div > a:first-child { border-left: 0; }
.i59-chooser > div > a span { color: var(--i59-red); font-size: .68rem; font-weight: 850; letter-spacing: .1em; text-transform: uppercase; }
.i59-chooser > div > a h2 { margin: 4rem 0 1rem; font-size: 2rem; line-height: 1; }
.i59-chooser > div > a p { color: var(--muted); }
.i59-chooser > div > a strong { display: block; margin-top: 2rem; font-size: .78rem; }

@media (max-width: 900px) {
  .i59-hero { grid-template-columns: 1fr; }
  .i59-hero aside { max-width: 320px; }
  .i59-deck { display: block; }
  .i59-deck span { display: block; margin-top: 1rem; }
  .i59-layout,
  .i59--worker-and-machine .i59-layout { grid-template-columns: 1fr; }
  .i59-rail { position: static; display: grid; grid-template-columns: 1fr 1fr; max-height: none; }
  .i59-rail > div { grid-column: 1 / -1; }
  .i59-rail a { padding-right: 1rem; }
  .i59--promotion-ladder > .i59-ladder ol { grid-template-columns: 1fr 1fr; }
  .i59-chooser > div { grid-template-columns: 1fr; }
  .i59-chooser > div > a { min-height: 0; border-left: 0; }
  .i59-chooser > div > a h2 { margin-top: 1.5rem; }
}

@media (max-width: 680px) {
  .i59-view-nav { top: 64px; justify-content: flex-start; overflow-x: auto; }
  .i59-view-nav a { flex: 0 0 auto; }
  .i59-view-tools { flex: 0 0 auto; margin-right: .5rem; }
  .i59-hero,
  .i59-deck,
  .i59-layout,
  .i59-dual-key,
  .i59--promotion-ladder > .i59-ladder,
  .i59-support { width: min(calc(100% - 2rem), 1260px); }
  .i59-hero h1 { font-size: clamp(3rem, 16vw, 5rem); }
  .i59-rail { grid-template-columns: 1fr; }
  .i59-rail > div { grid-column: auto; }
  .i59-scorecard ol,
  .i59-dual-key,
  .i59--worker-and-machine .i59-article,
  .i59--promotion-ladder > .i59-ladder ol { grid-template-columns: 1fr; }
  .i59-dual-key div + div { border-left: 0; border-top: 1px solid var(--line); }
  .i59--worker-and-machine .i59-section--worker,
  .i59--worker-and-machine .i59-section--machine,
  .i59--worker-and-machine .i59-section--convergence { grid-column: 1; }
  .i59--worker-and-machine .i59-section { padding: 1.25rem 0; border-left: 0; border-right: 0; }
  .i59--promotion-ladder > .i59-ladder li { border-left: 0; border-top: 1px solid var(--line); }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
}

@media print {
  .sp-topbar,
  .sp-proofbar,
  .i59-view-nav,
  .i59-rail { display: none !important; }
  .i59-view-tools { display: none !important; }
  .i59,
  .i59-layout,
  .i59--worker-and-machine .i59-layout { width: 100%; display: block; }
  .i59-section,
  .i59-module { break-inside: avoid; }
  .i59-support { width: 100%; }
}