:root {
  --ink: #20252b;
  --muted: #59616a;
  --paper: #efeee9;
  --surface: #faf9f6;
  --white: #ffffff;
  --line: #c9cbc8;
  --line-strong: #9ca19f;
  --deep: #293946;
  --signal: #7a4038;
  --soft: #e5e4de;
  --focus: #155f8a;
  --max: 1180px;
  --measure: 74ch;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.58;
}
a { color: inherit; }
button, a { -webkit-tap-highlight-color: transparent; }
h1, h2, h3, p { margin-top: 0; }

.skip-link {
  position: fixed;
  left: 1rem;
  top: -4rem;
  z-index: 100;
  background: var(--surface);
  padding: .7rem 1rem;
  border: 2px solid var(--focus);
}
.skip-link:focus { top: 1rem; }

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  min-height: 64px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 2rem;
  padding: 0 max(24px, calc((100vw - var(--max)) / 2));
  background: var(--surface);
  border-top: 4px solid var(--deep);
  border-bottom: 1px solid var(--line);
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: .72rem;
  text-decoration: none;
  font-size: .94rem;
  font-weight: 720;
  letter-spacing: -.015em;
}
.brand-mark { width: 31px; height: 25px; position: relative; display: inline-block; }
.brand-mark::before {
  content: "";
  position: absolute;
  left: 4px;
  right: 4px;
  top: 12px;
  height: 1px;
  background: var(--deep);
  transform: rotate(-12deg);
}
.brand-mark i {
  position: absolute;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--signal);
  border: 1px solid var(--surface);
}
.brand-mark i:nth-child(1) { left: 0; top: 14px; }
.brand-mark i:nth-child(2) { left: 12px; top: 7px; }
.brand-mark i:nth-child(3) { right: 0; top: 2px; }
.site-menu { display: flex; align-items: center; gap: 1.35rem; font-size: .88rem; }
.site-menu a { text-decoration: none; color: var(--muted); padding: .25rem 0; }
.site-menu a:hover, .site-menu a:focus-visible { color: var(--ink); border-bottom: 1px solid var(--ink); }
.nav-action { border: 1px solid var(--line-strong); padding: .42rem .72rem !important; color: var(--ink) !important; }
.nav-action:hover, .nav-action:focus-visible { border-color: var(--ink) !important; border-bottom-width: 1px !important; }
.menu-toggle { display: none; border: 1px solid var(--line-strong); background: transparent; padding: .45rem .65rem; font: inherit; }

.eyebrow {
  margin: 0 0 .8rem;
  text-transform: uppercase;
  letter-spacing: .13em;
  font-weight: 760;
  font-size: .7rem;
  color: var(--signal);
}
h1, h2 {
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  color: var(--ink);
}
h1 {
  max-width: 760px;
  margin-bottom: 1.25rem;
  font-size: clamp(2.75rem, 5.5vw, 5.2rem);
  line-height: .98;
  letter-spacing: -.045em;
  font-weight: 650;
}
h2 {
  font-size: clamp(1.9rem, 3.4vw, 3.25rem);
  line-height: 1.06;
  letter-spacing: -.032em;
  font-weight: 640;
  margin-bottom: .9rem;
}

.hero {
  max-width: var(--max);
  margin: 0 auto;
  min-height: 590px;
  padding: 68px 24px 62px;
  display: grid;
  grid-template-columns: 1.04fr .96fr;
  align-items: center;
  gap: 48px;
}
.hero-intro { max-width: 660px; color: var(--muted); font-size: clamp(1.04rem, 1.35vw, 1.18rem); }
.hero-actions { display: flex; flex-wrap: wrap; gap: .65rem; margin-top: 1.6rem; }
.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: .62rem .9rem;
  text-decoration: none;
  border: 1px solid var(--line-strong);
  font-size: .9rem;
  font-weight: 700;
}
.button.primary { background: var(--deep); border-color: var(--deep); color: var(--white); }
.button.primary:hover { background: var(--ink); border-color: var(--ink); }
.button.secondary { background: transparent; }
.button.secondary:hover { background: var(--surface); border-color: var(--ink); }
.button.light { border-color: rgba(255, 255, 255, .7); color: var(--white); }

.public-boundary {
  margin-top: 1.35rem;
  padding: .9rem 1rem;
  border-left: 3px solid var(--line-strong);
  background: var(--surface);
  color: var(--muted);
  font-size: .91rem;
  max-width: 700px;
}
.hero-figure {
  position: relative;
  min-height: 400px;
  background: var(--deep);
  border: 1px solid #1d2a34;
  overflow: hidden;
}
.hero-figure::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    repeating-linear-gradient(0deg, transparent 0 63px, rgba(255, 255, 255, .055) 64px),
    repeating-linear-gradient(90deg, transparent 0 63px, rgba(255, 255, 255, .055) 64px);
}
.time-line { position: absolute; left: 12%; right: 10%; bottom: 24%; height: 1px; background: rgba(255, 255, 255, .38); }
.node {
  position: absolute;
  width: 17px;
  height: 17px;
  border-radius: 50%;
  border: 3px solid var(--deep);
  background: #c4a466;
  box-shadow: 0 0 0 1px rgba(255, 255, 255, .42);
}
.node::after {
  content: attr(data-label);
  position: absolute;
  white-space: nowrap;
  left: 50%;
  transform: translateX(-50%);
  top: 24px;
  color: rgba(255, 255, 255, .78);
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: .62rem;
  letter-spacing: .045em;
  text-transform: uppercase;
}
.n1 { left: 14%; bottom: 21.5%; }
.n2 { left: 31%; bottom: 34%; }
.n3 { left: 55%; bottom: 48%; }
.n4 { left: 70%; bottom: 29%; }
.n5 { right: 10%; bottom: 21.5%; background: #aa6558; }
.relations { position: absolute; inset: 0; width: 100%; height: 100%; }
.relations path { fill: none; stroke: rgba(196, 164, 102, .68); stroke-width: 1.5; stroke-dasharray: 6 7; }
.figure-caption {
  position: absolute;
  top: 8%;
  left: 8%;
  right: 8%;
  color: var(--white);
  font-size: 1.05rem;
  font-weight: 620;
  max-width: 300px;
}

.section { padding: 78px max(24px, calc((100vw - var(--max)) / 2)); }
.section-heading { max-width: 760px; margin-bottom: 32px; }
.section-heading.narrow { max-width: 680px; }
.section-heading > p:last-child { color: var(--muted); font-size: 1.02rem; }
.applications, .learn { background: var(--surface); }
.domain-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  border-top: 1px solid var(--line);
  border-left: 1px solid var(--line);
}
.domain-card {
  min-height: 185px;
  padding: 19px;
  text-align: left;
  background: var(--surface);
  border: 0;
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  cursor: pointer;
  display: flex;
  flex-direction: column;
  gap: .65rem;
  color: var(--ink);
}
.domain-card:hover, .domain-card:focus-visible { background: var(--soft); outline: none; box-shadow: inset 3px 0 0 var(--signal); }
.domain-index { font: 700 .68rem/1.2 ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; color: var(--signal); letter-spacing: .08em; }
.domain-card strong { font-size: 1.08rem; font-weight: 680; line-height: 1.2; }
.domain-card span:last-child { margin-top: auto; color: var(--muted); font-size: .82rem; }

.reveal { background: var(--paper); }
.question-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1px; background: var(--line); border: 1px solid var(--line); }
.question-grid article { min-height: 215px; background: var(--paper); padding: 22px; }
.question-grid article:hover { background: var(--surface); }
.question-grid span { font: 700 .68rem/1.2 ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; text-transform: uppercase; letter-spacing: .1em; color: var(--signal); }
.question-grid h3 { font-size: 1.12rem; line-height: 1.25; margin-top: 2rem; }
.question-grid p { color: var(--muted); font-size: .86rem; }

.principles { display: grid; grid-template-columns: 1fr 1.1fr; gap: 58px; background: var(--deep); color: var(--white); }
.principles h2 { color: var(--white); }
.principle-copy p:last-child { color: rgba(255, 255, 255, .72); font-size: 1rem; max-width: 570px; }
.principle-list { border-top: 1px solid rgba(255, 255, 255, .22); }
.principle-list div { display: grid; grid-template-columns: .8fr 1.2fr; gap: 2rem; padding: 1.15rem 0; border-bottom: 1px solid rgba(255, 255, 255, .22); }
.principle-list span { color: rgba(255, 255, 255, .7); }

.learn-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; }
.route-card {
  min-height: 260px;
  padding: 24px;
  border: 1px solid var(--line);
  text-decoration: none;
  display: flex;
  flex-direction: column;
  background: var(--surface);
}
.route-card:hover, .route-card:focus-visible { border-color: var(--line-strong); box-shadow: inset 0 3px 0 var(--signal); }
.route-card span { font: 700 .68rem/1.2 ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; text-transform: uppercase; letter-spacing: .1em; color: var(--signal); }
.route-card h3 { font-size: 1.3rem; line-height: 1.2; margin-top: 2.15rem; }
.route-card p { color: var(--muted); font-size: .92rem; }
.route-card b { margin-top: auto; font-size: .88rem; }

.enter {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 3rem;
  background: #dfe1df;
  color: var(--ink);
  border-top: 1px solid var(--line);
}
.enter h2 { max-width: 700px; }
.enter p:last-child { color: var(--muted); }
.enter-actions { display: flex; gap: .8rem; flex-shrink: 0; }
.enter .button.primary { background: var(--deep); border-color: var(--deep); color: var(--white); }

.site-footer {
  min-height: 145px;
  padding: 34px max(24px, calc((100vw - var(--max)) / 2));
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  background: #1f2a33;
  color: var(--white);
  border-top: 4px solid var(--signal);
}
.site-footer div { display: flex; flex-direction: column; }
.site-footer span { color: rgba(255, 255, 255, .58); font-size: .88rem; }
.site-footer nav { display: flex; gap: 1.2rem; }
.site-footer a { color: rgba(255, 255, 255, .72); text-decoration: none; font-size: .88rem; }

.domain-dialog {
  width: min(850px, calc(100vw - 32px));
  border: 1px solid var(--line-strong);
  padding: 36px;
  color: var(--ink);
  background: var(--surface);
  box-shadow: 0 24px 70px rgba(0, 0, 0, .24);
}
.domain-dialog::backdrop { background: rgba(20, 27, 33, .68); }
.dialog-close { position: absolute; right: 18px; top: 14px; border: 0; background: transparent; font-size: 2rem; cursor: pointer; }
.dialog-intro { font-size: 1.04rem; color: var(--muted); max-width: 700px; }
.dialog-columns { display: grid; grid-template-columns: 1fr 1fr; gap: 30px; margin: 26px 0; }
.dialog-columns h3 { font-size: 1.05rem; }
.dialog-columns ul { padding-left: 1.2rem; color: var(--muted); }

.content-page { min-height: 70vh; }
.page-hero {
  padding: 78px max(24px, calc((100vw - var(--max)) / 2)) 52px;
  border-bottom: 1px solid var(--line);
  background: var(--paper);
}
.page-hero h1 { max-width: 920px; font-size: clamp(2.7rem, 5.2vw, 4.9rem); }
.page-hero > p:last-child { font-size: 1.12rem; color: var(--muted); max-width: 820px; }
.prose-section { max-width: 1040px; margin: auto; padding: 60px max(24px, 5vw); }
.prose-section > h2 { font-size: clamp(1.75rem, 3vw, 2.65rem); margin: 3.1rem 0 1.1rem; }
.prose-section > h2:first-child { margin-top: 0; }
.prose-section > p, .prose-section li { font-size: 1.02rem; line-height: 1.72; color: var(--muted); }
.step-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1px; background: var(--line); border: 1px solid var(--line); margin: 1.8rem 0; }
.step-grid article { background: var(--surface); padding: 1.55rem; min-height: 195px; }
.step-grid article > span { font: 700 .72rem/1.2 ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; letter-spacing: .1em; color: var(--signal); }
.step-grid h3 { font-size: 1.2rem; }
.statement-list { border-top: 1px solid var(--line); }
.statement-list p { padding: 1.05rem 0; border-bottom: 1px solid var(--line); margin: 0; }
.publication-list article { padding: 2rem 0; border-bottom: 1px solid var(--line); }
.publication-list article h2 { font-size: clamp(1.5rem, 2.6vw, 2.2rem); margin: .3rem 0; }
.notice-box { margin: 2.4rem 0; padding: 1.3rem 1.45rem; border: 1px solid var(--line); background: var(--surface); }
.notice-box p { margin: .45rem 0; color: var(--muted); }
.safeguards-grid { grid-template-columns: repeat(2, 1fr); }
.contact-panel ul { padding-left: 1.4rem; }
.small-note { font-size: .9rem !important; }
.public-contact { border-top: 1px solid var(--line); }

.article-hero h1 { max-width: 1000px; }
.article-deck { max-width: 900px; }
.article-status {
  max-width: 900px;
  margin-top: 1.7rem;
  padding: .85rem 1rem;
  border: 1px solid var(--line);
  display: grid;
  grid-template-columns: 105px 1fr;
  gap: 1rem;
  background: var(--surface);
  font-size: .92rem;
}
.article-status span { color: var(--muted); }
.longform { max-width: 860px; background: var(--surface); border-left: 1px solid var(--line); border-right: 1px solid var(--line); }
.longform .lead { font-family: Georgia, "Times New Roman", serif; font-size: 1.36rem; line-height: 1.52; color: var(--ink); }
.longform h2 { font-size: clamp(1.7rem, 3vw, 2.5rem); margin-top: 3.6rem; }
.longform h3 { font-size: clamp(1.35rem, 2.4vw, 1.85rem); line-height: 1.18; margin: 3rem 0 1rem; }
.longform p, .longform li { font-size: 1.04rem; line-height: 1.78; color: var(--muted); }
.longform a { overflow-wrap: anywhere; }
.longform blockquote { margin: 2.5rem 0; padding: 1.35rem 1.65rem; border-left: 3px solid var(--signal); font-family: Georgia, "Times New Roman", serif; font-size: 1.42rem; line-height: 1.48; color: var(--ink); background: var(--soft); }
.longform table {
  display: block;
  width: 100%;
  margin: 1.8rem 0 2.2rem;
  border-collapse: collapse;
  overflow-x: auto;
  background: var(--surface);
  font-size: .91rem;
}
.longform th, .longform td { min-width: 11rem; padding: .78rem .85rem; text-align: left; vertical-align: top; border: 1px solid var(--line); }
.longform th { color: var(--ink); background: var(--soft); font-size: .78rem; letter-spacing: .035em; }
.longform td { color: var(--muted); }
.axiom-panel { display: grid; grid-template-columns: repeat(2, 1fr); gap: 1px; background: var(--line); border: 1px solid var(--line); margin: 1.8rem 0; }
.axiom-panel p { margin: 0; padding: 1rem 1.15rem; background: var(--surface); color: var(--ink); font-family: Georgia, "Times New Roman", serif; font-size: 1.08rem; }
.sequence-list { counter-reset: item; list-style: none; padding: 0; margin: 1.8rem 0; border-top: 1px solid var(--line); }
.sequence-list li { position: relative; padding: 1.05rem 0 1.05rem 3rem; border-bottom: 1px solid var(--line); }
.sequence-list li::before { counter-increment: item; content: counter(item); position: absolute; left: 0; top: 1rem; width: 1.8rem; height: 1.8rem; display: grid; place-items: center; border-radius: 2px; background: var(--deep); color: var(--white); font-weight: 800; font-size: .78rem; }
.comparison-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 1px; background: var(--line); border: 1px solid var(--line); margin: 1.8rem 0; }
.comparison-grid article { background: var(--surface); padding: 1.2rem; }
.comparison-grid strong { display: block; font-family: Georgia, "Times New Roman", serif; font-size: 1.2rem; margin-bottom: .35rem; }
.comparison-grid span { color: var(--muted); }
.safeguard-list { padding-left: 1.3rem; }
.safeguard-list li { margin: .55rem 0; }
.proposal-box { margin: 1.8rem 0; border: 1px solid var(--line); background: var(--surface); padding: 1.45rem; }
.proposal-box p { padding: .85rem 0; border-bottom: 1px solid var(--line); margin: 0; }
.proposal-box p:last-child { border-bottom: 0; }
.source-note { margin-top: 4rem; padding-top: 1.7rem; border-top: 2px solid var(--ink); }
.source-note h2 { margin-top: 0; font-size: 1.7rem; }
.source-note a, .text-link { font-weight: 750; color: var(--signal); text-decoration: none; }
.featured-publication { padding: 1.65rem !important; margin-bottom: 1rem; border: 1px solid var(--line-strong) !important; border-left: 4px solid var(--signal) !important; background: var(--surface); }
.featured-publication h2 a { text-decoration: none; }
.featured-publication h2 a:hover { text-decoration: underline; }
.section-divider { margin-top: 3.8rem; padding-top: 2.8rem; border-top: 2px solid var(--ink); }
.paper-signature { margin-top: 3rem; color: var(--ink) !important; font-weight: 700; }

:focus-visible { outline: 3px solid var(--focus); outline-offset: 3px; }

@media (max-width: 1050px) {
  .domain-grid { grid-template-columns: repeat(3, 1fr); }
  .question-grid { grid-template-columns: repeat(2, 1fr); }
  .hero { grid-template-columns: 1fr; }
  .hero-figure { min-height: 390px; }
  .principles { grid-template-columns: 1fr; }
  .learn-grid { grid-template-columns: 1fr; }
  .route-card { min-height: 210px; }
  .enter { align-items: flex-start; flex-direction: column; }
}

@media (max-width: 760px) {
  .site-header { padding: 0 18px; }
  .menu-toggle { display: block; }
  .site-menu { display: none; position: absolute; left: 0; right: 0; top: 63px; padding: 18px; background: var(--surface); border-bottom: 1px solid var(--line); flex-direction: column; align-items: stretch; }
  .site-menu.open { display: flex; }
  .hero { padding: 54px 20px 48px; min-height: auto; }
  .hero-figure { min-height: 340px; }
  h1 { font-size: clamp(2.7rem, 13vw, 4.2rem); }
  .section { padding: 58px 20px; }
  .domain-grid { grid-template-columns: 1fr; }
  .domain-card { min-height: 145px; }
  .question-grid { grid-template-columns: 1fr; }
  .principle-list div { grid-template-columns: 1fr; gap: .35rem; }
  .enter-actions { width: 100%; flex-direction: column; }
  .site-footer { align-items: flex-start; gap: 2rem; flex-direction: column; }
  .site-footer nav { flex-direction: column; }
  .dialog-columns { grid-template-columns: 1fr; }
  .domain-dialog { padding: 30px 21px; }
  .step-grid, .safeguards-grid { grid-template-columns: 1fr; }
  .page-hero { padding-top: 60px; }
  .article-status { grid-template-columns: 1fr; }
  .axiom-panel, .comparison-grid { grid-template-columns: 1fr; }
  .longform { border-left: 0; border-right: 0; }
  .longform blockquote { font-size: 1.25rem; padding: 1.2rem; }
  .longform .lead { font-size: 1.24rem; }
}

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