:root {
  --ink: #111611;
  --ink-soft: #273128;
  --paper: #f4f3eb;
  --paper-2: #e9e8df;
  --signal: #d9ff43;
  --signal-dark: #98b51f;
  --line: rgba(17, 22, 17, 0.2);
  --muted: #667068;
  --max: 1280px;
  --pad: clamp(1.35rem, 4vw, 4rem);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: "Helvetica Neue", Helvetica, Arial, sans-serif;
  font-size: 16px;
  line-height: 1.55;
  text-rendering: optimizeLegibility;
}
a { color: inherit; text-decoration-thickness: 1px; text-underline-offset: 0.22em; }
button, a { -webkit-tap-highlight-color: transparent; }
.skip-link { position: fixed; left: 1rem; top: -5rem; z-index: 100; background: var(--signal); padding: .7rem 1rem; }
.skip-link:focus { top: 1rem; }

.site-header {
  position: sticky; top: 0; z-index: 20;
  display: flex; align-items: center; justify-content: space-between;
  min-height: 76px; padding: 0 var(--pad);
  background: rgba(244,243,235,.94); border-bottom: 1px solid var(--line);
  backdrop-filter: blur(12px);
}
.brand { font-weight: 760; letter-spacing: -.04em; font-size: 1.35rem; text-decoration: none; }
.brand-ai { color: var(--signal-dark); }
.nav { display: flex; align-items: center; gap: clamp(1rem, 2.5vw, 2.4rem); }
.nav a { text-decoration: none; font-size: .9rem; }
.nav a:hover, .nav a[aria-current="page"] { text-decoration: underline; }
.lang-switcher { display: inline-flex; align-items: center; gap: .35rem; padding-left: clamp(.25rem, 1vw, 1rem); border-left: 1px solid var(--line); font-family: "IBM Plex Mono", monospace; font-size: .72rem; font-weight: 600; letter-spacing: .08em; }
.lang-switcher a { font-size: inherit; }
.lang-switcher .is-current { text-decoration: underline; text-underline-offset: .32rem; }
.menu-toggle { display: none; border: 0; background: none; font: inherit; padding: .5rem; }

.wrap { width: min(100%, var(--max)); margin: 0 auto; padding-inline: var(--pad); }
.hero { min-height: calc(100vh - 76px); display: grid; align-items: end; border-bottom: 1px solid var(--line); }
.hero-grid { display: grid; grid-template-columns: minmax(0, 1.35fr) minmax(250px, .65fr); gap: 3rem; padding-block: clamp(5rem, 11vh, 9rem) clamp(3rem, 7vh, 6rem); }
.eyebrow, .kicker { font-size: .76rem; text-transform: uppercase; letter-spacing: .15em; font-weight: 680; }
.hero h1 { margin: .65rem 0 0; max-width: 12ch; font-size: clamp(4.5rem, 11vw, 10rem); line-height: .82; letter-spacing: -.075em; font-weight: 760; }
.hero h1 span { display: block; }
.hero h1 .thought { font-weight: 410; }
.hero-side { align-self: end; padding-bottom: .5rem; }
.descriptor { max-width: 19ch; font-size: clamp(1.35rem, 2.5vw, 2rem); line-height: 1.18; letter-spacing: -.03em; }
.definition { max-width: 34rem; margin: 3rem 0 0; font-size: 1.05rem; color: var(--ink-soft); }
.downmark { display: inline-flex; align-items: center; gap: .8rem; margin-top: 2.5rem; font-size: .78rem; text-transform: uppercase; letter-spacing: .12em; text-decoration: none; }
.downmark::before { content: ""; width: 2.5rem; height: 1px; background: currentColor; }

.section { padding-block: clamp(5rem, 10vw, 9rem); border-bottom: 1px solid var(--line); }
.section-dark { color: var(--paper); background: var(--ink); }
.section-signal { background: var(--signal); }
.section-head { display: grid; grid-template-columns: .5fr 1.5fr; gap: 2rem; margin-bottom: clamp(3rem, 7vw, 6rem); }
.section-no { font: 500 .8rem/1 ui-monospace, SFMono-Regular, Menlo, monospace; }
.section-title { margin: 0; max-width: 15ch; font-size: clamp(2.6rem, 6vw, 5.6rem); line-height: .95; letter-spacing: -.055em; font-weight: 650; }
.section-intro { max-width: 50rem; margin: 1.4rem 0 0; font-size: clamp(1.05rem, 1.8vw, 1.35rem); color: var(--ink-soft); }
.section-dark .section-intro { color: #c4cac4; }

.system-map { display: grid; grid-template-columns: 1fr minmax(200px, .72fr) 1fr; grid-template-rows: repeat(3, 1fr); gap: 1px; background: var(--line); border: 1px solid var(--line); }
.system-node, .system-core { min-height: 130px; background: var(--paper); padding: 1.25rem; display: flex; flex-direction: column; justify-content: space-between; }
.system-node b { max-width: 11ch; font-size: 1.15rem; line-height: 1.1; }
.system-node small { color: var(--muted); }
.system-core { grid-column: 2; grid-row: 1 / 4; align-items: center; justify-content: center; text-align: center; background: var(--ink); color: var(--paper); position: relative; overflow: hidden; }
.system-core::before, .system-core::after { content: ""; position: absolute; border: 1px solid rgba(217,255,67,.45); border-radius: 50%; }
.system-core::before { width: 155px; height: 155px; }
.system-core::after { width: 230px; height: 230px; }
.system-core strong { z-index: 1; max-width: 8ch; font-size: clamp(1.4rem, 3vw, 2.4rem); line-height: .97; letter-spacing: -.04em; }

.shift-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 1px; background: rgba(244,243,235,.22); border: 1px solid rgba(244,243,235,.22); }
.shift { background: var(--ink); padding: clamp(1.5rem, 4vw, 3.5rem); }
.shift.lowres { color: var(--ink); background: var(--signal); }
.shift h3 { margin: 0 0 3rem; font-size: 1rem; font-weight: 500; }
.sequence { display: grid; gap: .9rem; counter-reset: step; }
.sequence div { display: grid; grid-template-columns: 2.2rem 1fr; align-items: center; font-size: clamp(1.3rem, 3vw, 2.2rem); line-height: 1.05; letter-spacing: -.03em; }
.sequence div::before { counter-increment: step; content: "0" counter(step); font: 500 .7rem/1 ui-monospace, monospace; opacity: .6; }
.sequence div + div { border-top: 1px solid currentColor; padding-top: .9rem; }

.split { display: grid; grid-template-columns: 1fr 1fr; gap: clamp(2rem, 8vw, 7rem); }
.prose-big { margin: 0; max-width: 27ch; font-size: clamp(1.8rem, 3.7vw, 3.4rem); line-height: 1.1; letter-spacing: -.045em; }
.prose { max-width: 40rem; font-size: 1.08rem; }
.principle-callout { margin-top: 3rem; padding: 1.5rem 0 0 1.5rem; border-left: 4px solid var(--signal-dark); }
.principle-callout strong { display: block; margin-bottom: .5rem; }

.access-models { display: grid; grid-template-columns: 1fr auto 1fr; gap: 2rem; align-items: stretch; }
.access-card { border: 1px solid var(--line); padding: 1.5rem; min-height: 320px; display: flex; flex-direction: column; }
.access-card.alt { background: var(--ink); color: var(--paper); }
.access-card h3 { margin: 0; font-size: .9rem; font-weight: 500; }
.access-chain { margin: auto 0 0; display: flex; flex-wrap: wrap; gap: .55rem; align-items: center; font-size: clamp(1.25rem, 2.4vw, 1.8rem); line-height: 1.15; }
.access-chain span:not(:last-child)::after { content: " →"; opacity: .45; }
.versus { align-self: center; font: 500 .7rem/1 ui-monospace, monospace; writing-mode: vertical-rl; letter-spacing: .12em; }

.criteria { display: grid; grid-template-columns: repeat(3, 1fr); counter-reset: criterion; border-top: 1px solid var(--line); }
.criterion { min-height: 260px; padding: 1.5rem; border-right: 1px solid var(--line); counter-increment: criterion; }
.criterion:first-child { border-left: 1px solid var(--line); }
.criterion::before { content: "0" counter(criterion); display: block; margin-bottom: 5rem; font: 500 .75rem/1 ui-monospace, monospace; }
.criterion p { margin: 0; max-width: 18ch; font-size: clamp(1.25rem, 2vw, 1.6rem); line-height: 1.15; letter-spacing: -.025em; }

.principles-list { display: grid; grid-template-columns: 1fr 1fr; margin: 0; padding: 0; list-style: none; border-top: 1px solid rgba(244,243,235,.3); }
.principles-list li { min-height: 105px; padding: 1.3rem 0; border-bottom: 1px solid rgba(244,243,235,.3); display: grid; grid-template-columns: 3rem 1fr; align-items: center; font-size: clamp(1.35rem, 2.7vw, 2.2rem); letter-spacing: -.03em; }
.principles-list li:nth-child(odd) { padding-right: 2rem; }
.principles-list li:nth-child(even) { padding-left: 2rem; border-left: 1px solid rgba(244,243,235,.3); }
.principles-list span { font: 500 .7rem/1 ui-monospace, monospace; opacity: .6; }

.silac-mark { display: flex; align-items: center; gap: .8rem; font: 700 clamp(4rem, 12vw, 10rem)/.9 ui-monospace, SFMono-Regular, monospace; letter-spacing: -.1em; }
.silac-mark::before { content: ""; width: clamp(2rem, 6vw, 6rem); aspect-ratio: 1; background: var(--signal); border-radius: 50%; }
.silac-copy { display: grid; grid-template-columns: 1fr 1fr; gap: 3rem; margin-top: 4rem; }
.silac-copy .lead { font-size: clamp(1.5rem, 2.8vw, 2.4rem); line-height: 1.12; letter-spacing: -.035em; margin: 0; }
.knowledge-flow { margin-top: 5rem; display: grid; grid-template-columns: 1fr 1fr; gap: 1px; background: rgba(244,243,235,.2); border: 1px solid rgba(244,243,235,.2); }
.sources, .flow-steps { background: var(--ink); padding: 1.5rem; }
.source-item { min-height: 100px; border-bottom: 1px solid rgba(244,243,235,.25); display: flex; align-items: center; justify-content: space-between; gap: 1rem; }
.source-item:last-child { border: 0; }
.source-item span { font-size: 1.3rem; }
.source-item em { font-style: normal; font-size: .72rem; text-transform: uppercase; letter-spacing: .1em; color: var(--signal); }
.flow-steps { display: grid; align-content: center; gap: .7rem; }
.flow-steps div { padding: 1rem 1.2rem; color: var(--ink); background: var(--paper); font-size: 1.1rem; }
.flow-steps div:not(:last-child)::after { content: "↓"; float: right; }
.provenance { margin-top: 2rem; max-width: 48rem; color: #c4cac4; }
.inline-link { display: inline-flex; align-items: center; gap: .6rem; margin-top: 2rem; color: var(--signal); }

.domains { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1px; background: var(--line); border: 1px solid var(--line); }
.domain { background: var(--paper); min-height: 150px; padding: 1.25rem; display: flex; align-items: end; font-size: 1.2rem; }
.domain::before { content: "×"; align-self: start; margin-right: auto; color: var(--signal-dark); }

.why-grid { display: grid; grid-template-columns: 1.2fr .8fr; gap: 5rem; }
.why-stat { border-left: 1px solid var(--line); padding-left: 2rem; }
.why-stat strong { display: block; font-size: clamp(4rem, 9vw, 8rem); line-height: .8; letter-spacing: -.08em; }
.why-stat span { display: block; margin-top: 1.5rem; max-width: 20ch; }

.founder-note { display: grid; grid-template-columns: .65fr 1.35fr; gap: 3rem; align-items: start; }
.founder-meta { position: sticky; top: 110px; }
.founder-meta strong { display: block; font-size: 1.3rem; }
.founder-meta span { display: block; max-width: 24ch; margin-top: .5rem; color: var(--muted); }
blockquote { margin: 0; font-size: clamp(2rem, 4.4vw, 4.2rem); line-height: 1.06; letter-spacing: -.05em; }
blockquote footer { margin-top: 2rem; font-size: .85rem; letter-spacing: .08em; text-transform: uppercase; }

.notes-card { display: grid; grid-template-columns: .8fr 1.2fr; border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); padding-block: 1.5rem; text-decoration: none; }
.notes-card:hover h3 { text-decoration: underline; }
.notes-card time { font: 500 .78rem/1.4 ui-monospace, monospace; }
.notes-card h3 { margin: 0; max-width: 14ch; font-size: clamp(2rem, 4.2vw, 4rem); line-height: .98; letter-spacing: -.05em; }

.contact { text-align: center; padding-block: clamp(6rem, 14vw, 12rem); }
.contact h2 { margin: 0 auto; max-width: 12ch; font-size: clamp(3.5rem, 9vw, 8rem); line-height: .9; letter-spacing: -.07em; }
.contact p { margin: 2rem auto; max-width: 42rem; font-size: 1.1rem; }
.cta { display: inline-flex; align-items: center; justify-content: center; min-height: 56px; padding: 0 1.5rem; border: 1px solid var(--ink); background: var(--ink); color: var(--paper); text-decoration: none; transition: transform .18s, background .18s; }
.cta:hover { transform: translateY(-2px); background: var(--ink-soft); }

.site-footer { color: var(--paper); background: var(--ink); padding: 3rem var(--pad); }
.footer-grid { width: min(100%, var(--max)); margin: 0 auto; display: grid; grid-template-columns: 1fr 1fr; gap: 3rem; }
.footer-brand { font-size: clamp(2rem, 5vw, 4rem); line-height: 1; letter-spacing: -.05em; }
.footer-copy { display: grid; grid-template-columns: 1fr 1fr; gap: 2rem; font-size: .9rem; color: #bdc4bd; }
.footer-copy strong { color: var(--paper); }
.footer-legal { display: flex; gap: 1rem; margin-top: 1.5rem; }

.subpage { min-height: 70vh; padding-block: clamp(5rem, 12vw, 10rem); }
.subpage h1 { margin: 0; max-width: 12ch; font-size: clamp(4rem, 10vw, 9rem); line-height: .88; letter-spacing: -.07em; }
.subpage .intro { margin: 3rem 0 0 auto; max-width: 48rem; font-size: clamp(1.3rem, 2.5vw, 2rem); line-height: 1.25; }
.light-grid { display: grid; grid-template-columns: repeat(3, 1fr); border-top: 1px solid var(--line); margin-top: 6rem; }
.light-card { padding: 1.5rem 1.5rem 1.5rem 0; border-bottom: 1px solid var(--line); }
.light-card h2 { font-size: 1rem; margin: 0 0 2rem; }
.light-card p { color: var(--ink-soft); }
.silac-list { margin: 0; padding: 0; list-style: none; counter-reset: silac-point; border-top: 1px solid var(--line); }
.silac-list li { counter-increment: silac-point; display: grid; grid-template-columns: 2.7rem 1fr; gap: .6rem; padding: 1rem 0; border-bottom: 1px solid var(--line); font-size: clamp(1.05rem, 1.8vw, 1.35rem); line-height: 1.25; letter-spacing: -.02em; }
.silac-list li::before { content: "0" counter(silac-point); padding-top: .35rem; color: var(--muted); font: 500 .7rem/1 ui-monospace, SFMono-Regular, Menlo, monospace; }
.article { max-width: 780px; margin: 0 auto; padding-block: clamp(4rem, 10vw, 8rem); }
.article h1 { font-size: clamp(3rem, 8vw, 6rem); line-height: .95; letter-spacing: -.06em; }
.article .standfirst { font-size: 1.4rem; line-height: 1.35; color: var(--ink-soft); }
.article p { font-size: 1.12rem; }
.article h2 { margin: clamp(4rem, 9vw, 7rem) 0 1.5rem; font-size: clamp(2rem, 5vw, 3.7rem); line-height: 1; letter-spacing: -.05em; font-weight: 650; }
.article .article-emphasis { margin-block: 2.5rem; font-size: clamp(1.5rem, 3vw, 2.25rem); line-height: 1.2; letter-spacing: -.035em; color: var(--ink); }

@media (max-width: 780px) {
  .site-header { min-height: 66px; }
  .menu-toggle { display: block; }
  .nav { position: absolute; top: 66px; left: 0; right: 0; padding: 1rem var(--pad) 1.5rem; background: var(--paper); border-bottom: 1px solid var(--line); flex-direction: column; align-items: flex-start; opacity: 0; transform: translateY(-10px); pointer-events: none; transition: .2s ease; }
  .nav.open { opacity: 1; transform: none; pointer-events: auto; }
  .lang-switcher { padding-left: 0; border-left: 0; }
  .hero-grid, .section-head, .split, .silac-copy, .why-grid, .founder-note, .notes-card, .footer-grid { grid-template-columns: 1fr; }
  .hero { min-height: calc(100svh - 66px); }
  .hero-grid { align-content: end; gap: 3rem; }
  .hero h1 { font-size: clamp(4rem, 19vw, 7rem); }
  .section-head { gap: 1rem; }
  .system-map { grid-template-columns: 1fr 1fr; grid-template-rows: auto; }
  .system-core { grid-column: 1 / 3; grid-row: auto; min-height: 260px; }
  .shift-grid, .knowledge-flow { grid-template-columns: 1fr; }
  .access-models { grid-template-columns: 1fr; }
  .versus { writing-mode: horizontal-tb; text-align: center; }
  .criteria, .domains, .light-grid { grid-template-columns: 1fr; }
  .criterion { min-height: auto; border-left: 1px solid var(--line); border-bottom: 1px solid var(--line); }
  .criterion::before { margin-bottom: 3rem; }
  .principles-list { grid-template-columns: 1fr; }
  .principles-list li:nth-child(n) { padding-inline: 0; border-left: 0; }
  .founder-meta { position: static; }
  .footer-copy { grid-template-columns: 1fr; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition-duration: .01ms !important; }
}