:root {
  --bg: #0a0a0a;
  --panel: #101010;
  --panel-2: #151515;
  --text: #f1efe7;
  --muted: #aaa89f;
  --line: #2b2b29;
  --signal: #c9ff37;
  --signal-soft: rgba(201, 255, 55, 0.12);
  --max: 1440px;
  --pad: clamp(1.25rem, 4vw, 4.5rem);
  --serif: Georgia, 'Times New Roman', serif;
  --sans: Inter, ui-sans-serif, -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --mono: 'SFMono-Regular', Consolas, 'Liberation Mono', Menlo, monospace;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--sans);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

::selection { background: var(--signal); color: #060606; }
a { color: inherit; }
p { margin: 0; }

.skip-link {
  position: fixed;
  z-index: 1000;
  left: 1rem;
  top: 1rem;
  transform: translateY(-180%);
  padding: .7rem 1rem;
  background: var(--signal);
  color: #080808;
  text-decoration: none;
  font-weight: 700;
}
.skip-link:focus { transform: translateY(0); }

.mono {
  font-family: var(--mono);
  font-size: .72rem;
  line-height: 1.4;
  letter-spacing: .08em;
  text-transform: uppercase;
}

.section-shell {
  width: min(100%, var(--max));
  margin: 0 auto;
  padding-left: var(--pad);
  padding-right: var(--pad);
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 2rem;
  min-height: 72px;
  padding: 0 var(--pad);
  border-bottom: 1px solid rgba(255,255,255,.08);
  background: rgba(10,10,10,.88);
  backdrop-filter: blur(14px);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: .65rem;
  text-decoration: none;
}
.brand-mark {
  display: grid;
  place-items: center;
  width: 28px;
  height: 28px;
  border: 1px solid var(--signal);
  color: var(--signal);
  font-family: var(--mono);
  font-size: .85rem;
}
.brand-word {
  font-family: var(--mono);
  font-size: .78rem;
  font-weight: 700;
  letter-spacing: .18em;
}

.site-nav {
  display: flex;
  justify-content: center;
  gap: clamp(1rem, 3vw, 2.5rem);
}
.site-nav a {
  color: var(--muted);
  font-family: var(--mono);
  font-size: .68rem;
  text-decoration: none;
  text-transform: uppercase;
  letter-spacing: .07em;
  transition: color .2s ease;
}
.site-nav a:hover,
.site-nav a:focus-visible { color: var(--text); }

.status-pill {
  display: flex;
  align-items: center;
  gap: .5rem;
  color: var(--signal);
  font-family: var(--mono);
  font-size: .68rem;
  letter-spacing: .08em;
}
.status-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--signal);
  box-shadow: 0 0 14px rgba(201,255,55,.6);
  animation: pulse 2s infinite;
}
@keyframes pulse { 50% { opacity: .35; } }

.hero {
  min-height: calc(100vh - 72px);
  min-height: calc(100svh - 72px);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  padding-top: clamp(2rem, 6vh, 5rem);
  padding-bottom: clamp(2rem, 5vh, 4rem);
}
.hero-meta {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  color: var(--muted);
  border-top: 1px solid var(--line);
  padding-top: .9rem;
}
.hero-copy { padding: clamp(3rem, 8vh, 7rem) 0 2rem; }
.eyebrow {
  margin-bottom: 1.1rem;
  color: var(--signal);
  font-family: var(--mono);
  font-size: .75rem;
  letter-spacing: .1em;
}
.hero h1 {
  margin: 0;
  display: flex;
  align-items: baseline;
  gap: clamp(.5rem, 2vw, 2.2rem);
  font-size: clamp(4rem, 15vw, 14rem);
  font-weight: 520;
  line-height: .78;
  letter-spacing: -.075em;
}
.hero h1 .arrow {
  color: var(--muted);
  font-family: var(--serif);
  font-weight: 400;
  transform: translateY(-.06em);
}
.hero h1 .unknown {
  color: var(--signal);
  font-family: var(--serif);
  font-style: italic;
  font-weight: 400;
}
.hero-deck {
  width: min(840px, 90%);
  margin-top: clamp(2rem, 5vw, 4.25rem);
  font-size: clamp(1.2rem, 2.25vw, 2rem);
  line-height: 1.35;
  letter-spacing: -.025em;
}
.hero-grid {
  display: grid;
  grid-template-columns: 1.6fr .6fr;
  gap: 2rem;
  align-items: end;
  padding-top: 2rem;
  border-top: 1px solid var(--line);
}
.hero-statement {
  font-family: var(--serif);
  font-size: clamp(1.45rem, 3vw, 3rem);
  line-height: 1.05;
}
.accent-text { color: var(--signal); font-style: italic; }
.hero-note {
  display: grid;
  gap: .2rem;
  justify-self: end;
  min-width: 190px;
  color: var(--muted);
}
.hero-note strong {
  color: var(--text);
  font-family: var(--sans);
  font-size: .92rem;
  font-weight: 500;
  letter-spacing: 0;
  text-transform: none;
}
.scroll-cue {
  display: flex;
  justify-content: space-between;
  margin-top: 2rem;
  padding-top: .8rem;
  border-top: 1px solid var(--line);
  color: var(--muted);
  text-decoration: none;
}

.marquee {
  overflow: hidden;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  background: var(--signal);
  color: #080808;
}
.marquee-track {
  display: flex;
  width: max-content;
  align-items: center;
  gap: 1rem;
  padding: .85rem 0;
  font-family: var(--mono);
  font-size: .76rem;
  font-weight: 700;
  letter-spacing: .06em;
  animation: ticker 35s linear infinite;
}
.marquee-track i { font-style: normal; opacity: .45; }
@keyframes ticker { to { transform: translateX(-50%); } }

.content-section {
  padding-top: clamp(5.5rem, 11vw, 10rem);
  padding-bottom: clamp(5.5rem, 11vw, 10rem);
  border-bottom: 1px solid var(--line);
}
.section-index {
  color: var(--signal);
  margin-bottom: clamp(2rem, 5vw, 4rem);
}
.section-heading {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(260px, .55fr);
  gap: clamp(2rem, 6vw, 7rem);
  align-items: end;
  margin-bottom: clamp(3rem, 7vw, 6.5rem);
}
.section-heading h2,
.privacy-layout h2,
.closing-section h2 {
  margin: 0;
  max-width: 980px;
  font-size: clamp(2.5rem, 6.6vw, 7rem);
  font-weight: 520;
  line-height: .95;
  letter-spacing: -.055em;
}
.section-heading p {
  color: var(--muted);
  font-size: 1rem;
  line-height: 1.65;
}

.baseline-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: clamp(2rem, 5vw, 6rem);
}
.baseline-lead {
  position: sticky;
  top: 118px;
  align-self: start;
  padding-right: clamp(0rem, 3vw, 3rem);
}
.kicker { color: var(--signal); margin-bottom: 1.4rem; }
.baseline-lead h3 {
  margin: 0 0 2rem;
  font-family: var(--serif);
  font-size: clamp(2rem, 4vw, 4.2rem);
  font-weight: 400;
  line-height: 1.03;
}
.baseline-lead p:not(.kicker) {
  margin-top: 1.2rem;
  max-width: 680px;
  color: #d2d0c8;
  font-size: clamp(1rem, 1.4vw, 1.16rem);
  line-height: 1.72;
}
.trait-stack { border-top: 1px solid var(--line); }
.trait-card {
  display: grid;
  grid-template-columns: 52px 1fr;
  column-gap: 1rem;
  padding: 1.8rem 0 2rem;
  border-bottom: 1px solid var(--line);
}
.trait-num { color: var(--signal); }
.trait-card h3 { margin: 0 0 .6rem; font-size: 1.1rem; font-weight: 560; }
.trait-card p { grid-column: 2; color: var(--muted); line-height: 1.55; }
.baseline-tension {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1px;
  margin-top: clamp(4rem, 8vw, 8rem);
  background: var(--line);
  border: 1px solid var(--line);
}
.baseline-tension > div { background: var(--panel); padding: clamp(1.5rem, 3vw, 3rem); }
.baseline-tension span { color: var(--signal); }
.baseline-tension p { margin-top: 1.1rem; font-family: var(--serif); font-size: clamp(1.35rem, 2.3vw, 2.25rem); line-height: 1.24; }

.system-section { background: #0c0c0c; }
.loop-diagram {
  display: grid;
  grid-template-columns: 1fr .7fr 1fr;
  gap: 1rem;
  align-items: stretch;
  margin-bottom: 4rem;
}
.loop-node {
  min-height: 330px;
  padding: clamp(1.5rem, 3vw, 3rem);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  border: 1px solid var(--line);
  background: var(--panel);
}
.loop-node > span { color: var(--signal); }
.loop-node strong {
  font-size: clamp(1.8rem, 4vw, 4rem);
  font-weight: 520;
  line-height: 1.02;
  letter-spacing: -.04em;
}
.loop-flow {
  min-height: 330px;
  display: grid;
  place-items: center;
  grid-template-rows: 1fr auto 1fr auto;
  color: var(--muted);
}
.loop-flow > span { color: var(--signal); font-size: clamp(3rem, 5vw, 5rem); font-family: var(--serif); }
.loop-flow small { text-align: center; }

.bottleneck-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}
.bottleneck-card {
  min-height: 285px;
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  background: var(--bg);
}
.bottleneck-code {
  width: 44px;
  height: 44px;
  display: grid;
  place-items: center;
  border: 1px solid var(--signal);
  color: var(--signal);
  font-family: var(--mono);
  font-size: 1rem;
}
.bottleneck-card h3 { margin: 0 0 .7rem; font-size: 1.4rem; }
.bottleneck-card p { color: var(--muted); line-height: 1.55; }
.principle-block {
  margin-top: clamp(4rem, 9vw, 9rem);
  padding: clamp(2rem, 5vw, 5rem) 0 0;
  border-top: 1px solid var(--signal);
}
.principle-block > p { color: var(--signal); }
.principle-block blockquote {
  margin: 1.2rem 0 0;
  max-width: 1180px;
  font-family: var(--serif);
  font-size: clamp(2rem, 5.2vw, 5.8rem);
  line-height: 1.03;
  letter-spacing: -.04em;
}

.measure-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  border: 1px solid var(--line);
  background: var(--line);
}
.measure-item {
  min-height: 285px;
  background: var(--bg);
  padding: 1.5rem;
}
.measure-item > span {
  display: inline-block;
  margin-bottom: 4.5rem;
  color: var(--signal);
  font-family: var(--mono);
  font-size: .75rem;
}
.measure-item h3 { margin: 0 0 .75rem; font-size: 1.2rem; }
.measure-item p { color: var(--muted); line-height: 1.55; }

.hypotheses-section { background: var(--text); color: #0a0a0a; }
.hypotheses-section .section-index { color: #486100; }
.hypotheses-section .section-heading p { color: #5d5b55; }
.hypothesis-list { margin: 0; padding: 0; list-style: none; border-top: 1px solid #bdbbb2; }
.hypothesis-list li {
  display: grid;
  grid-template-columns: 90px 1fr;
  gap: 1rem;
  padding: clamp(1.4rem, 3vw, 2.7rem) 0;
  border-bottom: 1px solid #bdbbb2;
}
.hypothesis-list span { color: #486100; font-weight: 700; }
.hypothesis-list p { max-width: 1050px; font-family: var(--serif); font-size: clamp(1.25rem, 2.4vw, 2.3rem); line-height: 1.18; }

.metrics-panel {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}
.metric {
  min-height: 220px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  padding: 1.5rem;
  background: var(--panel);
}
.metric-value {
  color: var(--signal);
  font-family: var(--serif);
  font-size: clamp(3.5rem, 8vw, 7.5rem);
  line-height: .85;
}
.metric-label { color: var(--muted); }
.field-note {
  display: grid;
  grid-template-columns: .35fr 1fr;
  gap: clamp(2rem, 6vw, 7rem);
  margin-top: clamp(4rem, 8vw, 8rem);
  padding-top: 1.4rem;
  border-top: 1px solid var(--signal);
}
.field-note-meta { display: flex; flex-direction: column; gap: .35rem; color: var(--signal); }
.field-note-body h3 { margin: 0 0 1.3rem; font-family: var(--serif); font-size: clamp(2rem, 4vw, 4rem); font-weight: 400; }
.field-note-body p { max-width: 780px; margin-top: 1rem; color: var(--muted); font-size: 1.05rem; line-height: 1.65; }

.privacy-section { background: #0d0d0d; }
.privacy-layout {
  display: grid;
  grid-template-columns: 1fr .55fr;
  gap: clamp(2rem, 8vw, 9rem);
}
.privacy-copy p { color: var(--muted); font-size: 1.05rem; line-height: 1.7; }
.privacy-copy p + p { margin-top: 1.3rem; }

.closing-section {
  min-height: 80vh;
  min-height: 80svh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding-top: 8rem;
  padding-bottom: 8rem;
}
.closing-section > p.mono { color: var(--signal); margin-bottom: 1.5rem; }
.closing-mark {
  margin-top: clamp(4rem, 8vw, 8rem);
  font-size: clamp(3.5rem, 12vw, 11rem);
  font-weight: 520;
  line-height: .8;
  letter-spacing: -.07em;
}
.closing-mark span { color: var(--muted); font-family: var(--serif); }
.closing-mark strong { color: var(--signal); font-family: var(--serif); font-style: italic; font-weight: 400; }
.closing-copy { margin-top: 3rem; max-width: 620px; color: var(--muted); font-size: 1.1rem; line-height: 1.6; }
.back-top { margin-top: 4rem; width: fit-content; color: var(--signal); text-decoration: none; border-bottom: 1px solid var(--signal); padding-bottom: .25rem; }

.site-footer {
  display: flex;
  justify-content: space-between;
  gap: 2rem;
  padding-top: 1.5rem;
  padding-bottom: 2rem;
  border-top: 1px solid var(--line);
  color: var(--muted);
}
.site-footer > div { display: flex; gap: 1rem; align-items: center; }

.reveal {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity .65s ease, transform .65s ease;
}
.reveal.is-visible { opacity: 1; transform: none; }

.noscript {
  position: fixed;
  inset: auto 0 0;
  z-index: 100;
  padding: .7rem 1rem;
  background: var(--signal);
  color: #080808;
  font-family: var(--mono);
  font-size: .72rem;
  text-align: center;
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { scroll-behavior: auto !important; animation: none !important; transition: none !important; }
  .reveal { opacity: 1; transform: none; }
}

@media (max-width: 1050px) {
  .site-nav { display: none; }
  .site-header { grid-template-columns: 1fr auto; }
  .section-heading,
  .baseline-layout,
  .privacy-layout { grid-template-columns: 1fr; }
  .section-heading p { max-width: 700px; }
  .baseline-lead { position: static; }
  .bottleneck-grid,
  .measure-grid,
  .metrics-panel { grid-template-columns: repeat(2, 1fr); }
  .loop-diagram { grid-template-columns: 1fr; }
  .loop-flow { min-height: 160px; grid-template-rows: auto auto auto auto; }
  .loop-flow > span { transform: rotate(90deg); }
}

@media (max-width: 680px) {
  :root { --pad: 1rem; }
  .site-header { min-height: 62px; }
  .brand-word { font-size: .72rem; }
  .hero { min-height: calc(100svh - 62px); }
  .hero-meta { flex-wrap: wrap; justify-content: flex-start; column-gap: 1.2rem; }
  .hero-copy { padding-top: 4.5rem; }
  .hero h1 { font-size: clamp(4.2rem, 20vw, 7rem); gap: .35rem; }
  .hero-deck { width: 100%; font-size: 1.15rem; }
  .hero-grid { grid-template-columns: 1fr; }
  .hero-note { justify-self: start; margin-top: 1rem; }
  .section-heading h2,
  .privacy-layout h2,
  .closing-section h2 { font-size: clamp(2.5rem, 12vw, 4.6rem); }
  .baseline-tension,
  .bottleneck-grid,
  .measure-grid,
  .metrics-panel { grid-template-columns: 1fr; }
  .loop-node { min-height: 260px; }
  .measure-item { min-height: auto; }
  .measure-item > span { margin-bottom: 2.5rem; }
  .hypothesis-list li { grid-template-columns: 52px 1fr; }
  .field-note { grid-template-columns: 1fr; }
  .site-footer { flex-direction: column; }
  .site-footer > div { align-items: flex-start; flex-direction: column; }
}