:root {
  --ink: #1b1b18;
  --ink-soft: #2b2b26;
  --paper: #f3f0e7;
  --paper-bright: #fbfaf5;
  --lime: #d9ff57;
  --orange: #ff6a45;
  --teal: #2a9d8f;
  --deep: #21414f;
  --amber: #e9c46a;
  --clash: #d93b2b;
  --nonwc: #7a6bd8;
  --line: rgba(27, 27, 24, .2);
  --line-soft: rgba(27, 27, 24, .1);
  --muted: #5f5d54;
  --shadow: 0 24px 70px rgba(27, 27, 24, .13);
  --mono: "DM Mono", ui-monospace, monospace;
  --sans: "Space Grotesk", system-ui, sans-serif;
  --serif: "Instrument Serif", Georgia, serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 90px; }
body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.68;
  -webkit-font-smoothing: antialiased;
}
a { color: inherit; }
img { display: block; max-width: 100%; height: auto; }
button { font: inherit; color: inherit; }
h1, h2, h3, h4 { font-weight: 500; }
em { font-family: var(--serif); font-style: italic; font-weight: 400; }

/* ---------- chrome ---------- */
.reading-progress {
  position: fixed; inset: 0 0 auto; z-index: 100; height: 3px; background: transparent;
}
.reading-progress span { display: block; width: 0; height: 100%; background: var(--orange); }

.topbar {
  position: sticky; top: 0; z-index: 50; height: 74px;
  padding: 0 clamp(18px, 4vw, 64px);
  display: flex; align-items: center; justify-content: space-between; gap: 24px;
  border-bottom: 1px solid var(--line);
  background: rgba(243, 240, 231, .9);
  backdrop-filter: blur(16px);
}
.brand {
  display: flex; align-items: center; gap: 12px; text-decoration: none;
  font: 500 11px/1 var(--mono); letter-spacing: .1em;
}
.brand-mark {
  width: 40px; height: 40px; display: grid; place-items: center; border-radius: 50%;
  background: var(--ink); color: var(--lime); font-size: 10px; letter-spacing: .04em;
}
.topbar nav { display: flex; gap: 26px; }
.topbar nav a { text-decoration: none; font: 500 13px/1 var(--sans); }
.topbar nav a:hover { text-decoration: underline; text-underline-offset: 6px; }
.paper-link {
  padding: 10px 16px; border: 1px solid var(--ink); border-radius: 999px;
  text-decoration: none; font: 500 12px/1 var(--sans); white-space: nowrap;
}
.paper-link:hover { background: var(--lime); }
:focus-visible { outline: 3px solid var(--orange); outline-offset: 3px; }

main { overflow-x: clip; }

/* ---------- shared type ---------- */
.eyebrow, .kicker {
  margin: 0 0 20px; font: 500 10px/1.6 var(--mono); letter-spacing: .14em; text-transform: uppercase;
}
.eyebrow { display: flex; flex-wrap: wrap; gap: 8px 18px; }
.eyebrow span { position: relative; }
.eyebrow span + span::before {
  content: ""; position: absolute; left: -10px; top: 50%; width: 3px; height: 3px;
  border-radius: 50%; background: currentColor;
}
.lead { max-width: 780px; margin: 30px 0 0; color: var(--muted); font-size: clamp(17px, 1.5vw, 21px); }

/* ---------- hero ---------- */
.hero {
  padding: clamp(56px, 7vw, 110px) clamp(18px, 5vw, 80px) clamp(40px, 5vw, 70px);
  background:
    linear-gradient(rgba(27,27,24,.045) 1px, transparent 1px),
    linear-gradient(90deg, rgba(27,27,24,.045) 1px, transparent 1px),
    var(--paper);
  background-size: 42px 42px;
}
.hero-grid {
  max-width: 1440px; margin: auto; display: grid;
  grid-template-columns: minmax(0, 1.12fr) minmax(320px, .88fr);
  align-items: center; gap: clamp(34px, 5vw, 90px);
}
.hero h1 {
  margin: 0; max-width: 900px;
  font: 400 clamp(46px, 6.6vw, 108px)/.94 var(--sans);
  letter-spacing: -.045em;
}
.hero h1 em { letter-spacing: -.02em; }
.hero-deck { max-width: 700px; margin: 32px 0 0; color: var(--muted); font-size: clamp(16px, 1.4vw, 20px); }
.hero-deck strong { display: block; margin-top: 14px; color: var(--ink); font-weight: 500; }
.hero-actions { display: flex; align-items: center; flex-wrap: wrap; gap: 20px; margin-top: 36px; font: 500 11px/1 var(--mono); letter-spacing: .06em; }
.primary-button {
  display: inline-flex; align-items: center; gap: 36px; padding: 15px 20px; border-radius: 3px;
  background: var(--ink); color: var(--paper); text-decoration: none;
  font: 500 13px/1 var(--sans); letter-spacing: 0;
}
.primary-button span { color: var(--lime); }
.primary-button:hover { background: var(--deep); }

.chapter-paper { display: flex; flex-wrap: wrap; gap: 10px; margin: 30px 0 0; }
.chapter-paper a {
  display: inline-flex; align-items: center; gap: 9px; padding: 10px 15px;
  border: 1px solid var(--line); border-radius: 999px; text-decoration: none;
  font: 500 12.5px/1 var(--sans);
}
.chapter-paper a span { opacity: .55; }
.chapter-paper a:hover { border-color: currentColor; }
.chiron-section .chapter-paper a { border-color: rgba(243,240,231,.3); }
.chiron-section .chapter-paper a:hover { background: var(--lime); border-color: var(--lime); color: var(--ink); }
.ghost-button {
  display: inline-flex; align-items: center; gap: 12px; padding: 15px 20px; border-radius: 3px;
  border: 1px solid var(--ink); text-decoration: none; font: 500 13px/1 var(--sans); letter-spacing: 0;
}
.ghost-button:hover { background: var(--lime); }
.ghost-button span { opacity: .55; }

.hero-stage { position: relative; }
.hero-stage svg { width: 100%; height: auto; overflow: visible; }
.hx-covalent path, .gx-cov path { fill: none; stroke: var(--ink); stroke-width: 3; opacity: .55; }
.hx-wc line, .gx-wc line { stroke: var(--teal); stroke-width: 7; stroke-linecap: round; }
.hx-nonwc line, .gx-nonwc line { stroke: var(--nonwc); stroke-width: 3; stroke-dasharray: 7 8; }
.hx-nodes circle, .gx-nodes circle { fill: var(--paper-bright); stroke: var(--ink); stroke-width: 2.5; }
.hx-clash circle {
  fill: var(--clash); transform-box: fill-box; transform-origin: center;
  animation: clashPulse 2.2s ease-in-out infinite;
}
.hx-clash circle:nth-child(2) { animation-delay: -.7s; }
.stage-glow { animation: glowPulse 6s ease-in-out infinite; }
.stage-key {
  display: flex; flex-wrap: wrap; gap: 8px 20px; margin-top: 18px;
  font: 500 10px/1 var(--mono); letter-spacing: .08em; color: var(--muted);
}
.stage-key span { display: inline-flex; align-items: center; gap: 7px; }
.stage-key i, .edge-btn i { display: block; width: 16px; height: 3px; border-radius: 2px; }
.k-cov { background: var(--ink); opacity: .55; }
.k-wc { background: var(--teal); height: 5px !important; }
.k-nonwc { background: linear-gradient(90deg, var(--nonwc) 55%, transparent 55%); background-size: 7px 100%; }
.k-clash { background: var(--clash); width: 9px !important; height: 9px !important; border-radius: 50% !important; }

.hero-facts {
  max-width: 1440px; margin: clamp(46px, 6vw, 96px) auto 0;
  display: grid; grid-template-columns: repeat(4, 1fr);
  border-top: 1px solid var(--line); border-bottom: 1px solid var(--line);
}
.hero-facts div { padding: 20px 22px 20px 0; border-right: 1px solid var(--line-soft); }
.hero-facts div:last-child { border-right: 0; }
.hero-facts div + div { padding-left: 22px; }
.hero-facts strong { display: block; font: 400 clamp(26px, 2.4vw, 38px)/1 var(--sans); letter-spacing: -.03em; }
.hero-facts span { display: block; margin-top: 8px; color: var(--muted); font-size: 12.5px; line-height: 1.4; }

/* ---------- chapters ---------- */
.chapter { position: relative; padding: clamp(84px, 11vw, 170px) clamp(18px, 7vw, 110px); }
.section-marker {
  position: absolute; top: 96px; left: clamp(18px, 2.6vw, 44px);
  display: flex; flex-direction: column; align-items: center; gap: 16px; font-family: var(--mono);
}
.section-marker span {
  width: 42px; height: 42px; display: grid; place-items: center;
  border: 1px solid currentColor; border-radius: 50%; font-size: 12px;
}
.section-marker p { margin: 0; font-size: 9px; letter-spacing: .16em; writing-mode: vertical-rl; }
.chapter-copy, .chapter-heading { max-width: 1080px; margin: 0 auto 68px; }
.chapter-copy p:not(.kicker):not(.lead), .chapter-heading p:not(.kicker):not(.lead) {
  max-width: 720px; color: var(--muted);
}
.chapter h2 { margin: 0; font: 400 clamp(34px, 5vw, 72px)/1.04 var(--sans); letter-spacing: -.045em; }
.chapter h3 { margin: 0 0 14px; font: 400 clamp(23px, 2.6vw, 38px)/1.18 var(--sans); letter-spacing: -.03em; }
.result-heading { margin-top: clamp(70px, 9vw, 130px); }

/* ---------- growth chart ---------- */
.chart-block {
  max-width: 1240px; margin: 0 auto; padding: clamp(20px, 3vw, 34px);
  background: var(--paper-bright); border: 1px solid var(--line-soft); box-shadow: var(--shadow);
}
.chart-head {
  display: flex; align-items: flex-end; justify-content: space-between; flex-wrap: wrap; gap: 20px;
  padding-bottom: 24px; border-bottom: 1px solid var(--line-soft);
}
.chart-head .kicker { margin-bottom: 10px; }
.chart-head h3 { margin: 0; }
.chart-toggle { display: flex; border: 1px solid var(--ink); border-radius: 999px; overflow: hidden; }
.scale-btn {
  padding: 9px 16px; border: 0; background: transparent; cursor: pointer;
  font: 500 11px/1 var(--mono); letter-spacing: .05em;
}
.scale-btn.active { background: var(--ink); color: var(--paper); }
.chart-canvas { padding: 26px 0 6px; overflow-x: auto; }
.chart-canvas svg { width: 100%; min-width: 620px; height: auto; }
.gc-bar { transition: y .55s cubic-bezier(.4,0,.2,1), height .55s cubic-bezier(.4,0,.2,1); }
.gc-bar.protein { fill: var(--deep); }
.gc-bar.rna { fill: var(--orange); }
.gc-axis line { stroke: var(--line); stroke-width: 1; }
.gc-grid line { stroke: var(--line-soft); stroke-width: 1; stroke-dasharray: 3 5; }
.gc-label { fill: var(--muted); font: 500 11px var(--mono); }
.gc-value { fill: var(--ink); font: 500 10px var(--mono); transition: opacity .35s ease; }
.gc-series { font: 500 11px var(--mono); letter-spacing: .06em; }
.chart-note { max-width: 760px; margin: 18px 0 0; color: var(--muted); font-size: 14px; }

.gap-stats, .result-stats {
  max-width: 1240px; margin: 46px auto 0; display: grid; grid-template-columns: repeat(3, 1fr); gap: 1px;
  background: var(--line-soft); border: 1px solid var(--line-soft);
}
.gap-stats div, .result-stats div { padding: 26px 24px; background: var(--paper); }
.gap-stats strong, .result-stats strong {
  display: block; font: 400 clamp(30px, 3vw, 46px)/1 var(--sans); letter-spacing: -.035em; color: var(--orange);
}
.gap-stats span, .result-stats span { display: block; margin-top: 10px; color: var(--muted); font-size: 13.5px; line-height: 1.45; }

/* ---------- quality split ---------- */
.quality-split {
  max-width: 1240px; margin: clamp(60px, 8vw, 110px) auto 0;
  display: grid; grid-template-columns: 1.25fr .75fr; gap: clamp(30px, 5vw, 70px); align-items: center;
}
.quality-copy p:not(.kicker) { color: var(--muted); }
.dof-compare { display: grid; gap: 22px; padding: 30px; border: 1px solid var(--line); background: var(--paper-bright); }
.dof-label { display: block; font: 500 10px/1 var(--mono); letter-spacing: .12em; color: var(--muted); }
.dof-dots { display: flex; flex-wrap: wrap; gap: 7px; margin: 14px 0 10px; }
.dof-dots i { width: 20px; height: 20px; border-radius: 50%; background: var(--orange); }
.dof-compare > div:last-child .dof-dots i { background: var(--deep); }
.dof-value { font: 500 13px/1 var(--mono); }

/* ---------- thesis ---------- */
.thesis {
  max-width: 1240px; margin: clamp(60px, 8vw, 110px) auto 0; padding: clamp(28px, 5vw, 60px);
  background: var(--ink); color: var(--paper);
}
.thesis > span { color: var(--lime); font: 500 10px/1 var(--mono); letter-spacing: .14em; }
.thesis blockquote {
  max-width: 940px; margin: 24px 0 44px;
  font: 400 clamp(24px, 3.4vw, 46px)/1.24 var(--sans); letter-spacing: -.035em;
}
.thesis-split { display: grid; grid-template-columns: 1fr 1fr; gap: 1px; background: rgba(243,240,231,.2); }
.thesis-split > div { padding: 28px; background: var(--ink); }
.thesis-tag { margin: 0 0 14px; font: 500 10px/1 var(--mono); letter-spacing: .12em; color: var(--lime); }
.thesis-split strong { display: block; font: 400 26px/1 var(--sans); letter-spacing: -.02em; }
.thesis-split p:not(.thesis-tag) { margin: 12px 0 0; color: rgba(243,240,231,.62); font-size: 14.5px; }

/* ---------- atlas ---------- */
.atlas-section { background: linear-gradient(180deg, var(--paper) 0%, #efeadf 100%); }
.prior-work { max-width: 1240px; margin: auto; display: grid; grid-template-columns: repeat(3, 1fr); border: 1px solid var(--line-soft); }
.prior-work article { padding: 30px; border-right: 1px solid var(--line-soft); background: var(--paper-bright); }
.prior-work article:last-child { border-right: 0; }
.prior-work span { font: 500 9.5px/1 var(--mono); letter-spacing: .13em; color: var(--muted); }
.prior-work h3 { margin: 26px 0 10px; font-size: 22px; }
.prior-work p { margin: 0; color: var(--muted); font-size: 14.5px; }
.prior-verdict { background: var(--lime) !important; }
.prior-verdict span, .prior-verdict p { color: var(--ink-soft); }

.graph-lab {
  max-width: 1240px; margin: clamp(60px, 8vw, 110px) auto 0;
  display: grid; grid-template-columns: 1.15fr .85fr; gap: clamp(28px, 4vw, 60px); align-items: center;
  padding: clamp(24px, 4vw, 46px); border: 1px solid var(--line-soft); background: var(--paper-bright);
}
.graph-copy p:not(.kicker):not(.graph-readout):not(.graph-prompt) { color: var(--muted); }
.graph-prompt { margin: 24px 0 12px; font: 500 11px/1.5 var(--mono); letter-spacing: .06em; }
.edge-toggles { display: flex; flex-wrap: wrap; gap: 9px; }
.edge-btn {
  display: inline-flex; align-items: center; gap: 9px; padding: 9px 14px;
  border: 1px solid var(--line); border-radius: 999px; background: transparent; cursor: pointer;
  font: 500 11.5px/1 var(--sans); opacity: .42;
}
.edge-btn.active { opacity: 1; border-color: var(--ink); background: var(--paper); }
.graph-readout {
  min-height: 62px; margin: 22px 0 0; padding-left: 16px; border-left: 3px solid var(--orange);
  font-size: 15px;
}
.graph-demo svg { width: 100%; max-width: 380px; margin: auto; height: auto; }
.gx-cov, .gx-wc, .gx-nonwc { transition: opacity .35s ease; }
.gx-cov.off, .gx-wc.off, .gx-nonwc.off { opacity: .07; }

/* ---------- pipeline ---------- */
.pipeline-shell { max-width: 1240px; margin: clamp(60px, 8vw, 110px) auto 0; }
.pipeline-head { margin-bottom: 34px; }
.pipeline-tabs { display: grid; grid-template-columns: repeat(4, 1fr); border: 1px solid var(--line); }
.pipeline-tab {
  min-height: 104px; padding: 18px; border: 0; border-right: 1px solid var(--line);
  background: var(--paper-bright); text-align: left; cursor: pointer; color: var(--muted);
}
.pipeline-tab:last-child { border-right: 0; }
.pipeline-tab span, .pipeline-tab small { display: block; font: 500 9.5px/1.4 var(--mono); letter-spacing: .1em; }
.pipeline-tab strong { display: block; margin: 10px 0 5px; font: 400 19px/1 var(--sans); letter-spacing: -.01em; color: var(--ink); }
.pipeline-tab.active { background: var(--ink); color: rgba(243,240,231,.66); }
.pipeline-tab.active strong { color: var(--lime); }
.pipeline-visual { margin-top: -1px; padding: 30px 26px; border: 1px solid var(--line); background: var(--paper-bright); overflow-x: auto; }
.pipeline-visual svg { width: 100%; min-width: 720px; height: auto; }
.pipe-node rect { fill: rgba(27,27,24,.03); stroke: var(--line); stroke-width: 2; transition: .35s ease; }
.pipe-node text { fill: var(--muted); font: 500 12px var(--mono); letter-spacing: .07em; transition: .35s ease; }
.pipe-node.active rect { fill: rgba(217,255,87,.34); stroke: var(--ink); }
.pipe-node.active text { fill: var(--ink); }
.pipe-arrow { fill: none; stroke: var(--line); stroke-width: 2; }
#pipeArrow path { fill: rgba(27,27,24,.35); }
.pipe-doc, .pipe-doc-fold { fill: none; stroke: var(--deep); stroke-width: 2.5; }
.pipe-edges line { stroke: var(--teal); stroke-width: 6; stroke-linecap: round; }
.pipe-edges line.dashed { stroke: var(--nonwc); stroke-width: 3; stroke-dasharray: 6 7; }
.pipe-edges line.thin { stroke: var(--ink); stroke-width: 2; opacity: .5; }
.pipe-match circle { fill: var(--orange); }
.pipe-match path { fill: none; stroke: var(--orange); stroke-width: 2.5; }
.pipe-stack rect { fill: var(--deep); opacity: .8; }
.pipeline-explain {
  min-height: 210px; margin-top: -1px; padding: 34px;
  border: 1px solid var(--line); background: var(--ink); color: rgba(243,240,231,.68);
  display: grid; grid-template-columns: 110px 1fr 1fr; gap: 30px; align-items: start;
}
.pipeline-count { margin: 0; color: var(--lime); font: 500 11px/1.5 var(--mono); letter-spacing: .08em; }
.pipeline-explain h3 { margin: 0; color: var(--paper); font-size: clamp(21px, 2.2vw, 32px); }
.pipeline-explain p { margin: 0; }
.pipeline-explain ul { margin: 0; padding-left: 18px; }
.pipeline-explain li { margin-bottom: 8px; font-size: 14.5px; }

/* ---------- distributions ---------- */
.dist-grid {
  max-width: 1240px; margin: auto; display: grid; grid-template-columns: 1.05fr .95fr;
  gap: clamp(30px, 5vw, 70px); align-items: center;
}
.dist-chart, .pk-chart { margin: 0; padding: 30px; border: 1px solid var(--line-soft); background: var(--paper-bright); }
.dist-chart figcaption, .pk-chart figcaption {
  margin-bottom: 24px; font: 500 10px/1 var(--mono); letter-spacing: .13em; text-transform: uppercase; color: var(--muted);
}
.bar-rows { display: grid; gap: 14px; }
.bar-row { display: grid; grid-template-columns: 148px 1fr 58px; align-items: center; gap: 14px; }
.bar-row span { font-size: 13px; }
.bar-row b { font: 500 12.5px var(--mono); text-align: right; }
.bar-track { height: 14px; background: rgba(27,27,24,.07); border-radius: 2px; overflow: hidden; }
.bar-track i { display: block; width: var(--w); height: 100%; background: var(--deep); border-radius: 2px; }
.bar-rows.compact .bar-track i { background: var(--teal); }
.bar-rows .bar-row:first-child .bar-track i { background: var(--orange); }
.dist-note { margin: 22px 0 0; color: var(--muted); font-size: 12.5px; }
.dist-copy p { color: var(--muted); }
.dist-copy p:first-child { margin-top: 0; }

.payoff {
  max-width: 1240px; margin: clamp(60px, 8vw, 110px) auto;
  display: grid; grid-template-columns: .78fr 1.22fr; gap: clamp(28px, 4vw, 60px);
  padding: clamp(28px, 4vw, 52px); background: var(--deep); color: var(--paper);
}
.payoff-number span { display: block; font: 500 10px/1.6 var(--mono); letter-spacing: .12em; color: var(--amber); }
.payoff-number strong {
  display: block; margin: 14px 0 10px;
  font: 400 clamp(64px, 8vw, 128px)/.86 var(--sans); letter-spacing: -.06em;
}
.payoff-number p { margin: 0; color: rgba(243,240,231,.7); font-size: 15px; }
.payoff-copy p { margin-top: 0; color: rgba(243,240,231,.78); }
.payoff-copy p + p { margin-top: 18px; }

/* ---------- figures ---------- */
.paper-figure {
  max-width: 1240px; margin: clamp(50px, 7vw, 96px) auto 0; padding: 20px;
  background: var(--paper-bright); box-shadow: var(--shadow);
}
.paper-figure.wide { max-width: 1400px; }
.paper-figure.narrow { max-width: 880px; }
.paper-figure.on-dark { background: var(--paper-bright); color: var(--ink); }
.figure-meta {
  display: flex; justify-content: space-between; flex-wrap: wrap; gap: 14px;
  padding: 6px 4px 16px; font: 500 9.5px/1.4 var(--mono); letter-spacing: .11em; color: var(--muted);
}
.paper-figure img { width: 100%; background: #fff; }
.figure-reading { display: grid; grid-template-columns: 230px 1fr; gap: 28px; padding: 26px 6px 6px; border-top: 1px solid var(--line-soft); }
.figure-reading h3 { margin: 0; font-size: 19px; }
.figure-reading p { margin: 0; color: var(--muted); font-size: 14.5px; }
.paper-figure details { margin-top: 18px; padding: 16px 6px 4px; border-top: 1px solid var(--line-soft); }
.paper-figure summary { cursor: pointer; font: 500 14px/1 var(--sans); }
.paper-figure details p { margin: 16px 0 0; color: var(--muted); font-size: 14.5px; }

/* ---------- pseudoknots + craft ---------- */
.pk-block {
  max-width: 1240px; margin: clamp(60px, 8vw, 110px) auto 0;
  display: grid; grid-template-columns: 1.05fr .95fr; gap: clamp(30px, 5vw, 70px); align-items: center;
}
.pk-copy p:not(.kicker) { color: var(--muted); }
.craft-note {
  max-width: 1240px; margin: clamp(50px, 7vw, 96px) auto 0;
  display: grid; grid-template-columns: 220px 1fr; gap: 30px;
  padding: clamp(24px, 3.5vw, 40px); border: 1px solid var(--ink);
}
.craft-note > span { font: 500 10px/1.7 var(--mono); letter-spacing: .12em; color: var(--orange); }
.craft-note p { color: var(--muted); }
.craft-note p:last-child { margin-bottom: 0; }

/* ---------- evolution ---------- */
.evolution-section { background: var(--ink); color: var(--paper); }
.evolution-section .kicker, .evolution-section .section-marker { color: var(--amber); }
.evolution-section .lead,
.evolution-section .chapter-copy p:not(.kicker) { color: rgba(243,240,231,.66); }
.evolution-section .paper-figure { color: var(--ink); }
.fp-block {
  max-width: 1240px; margin: clamp(56px, 7vw, 100px) auto 0;
  display: grid; grid-template-columns: 1fr 1fr; gap: clamp(30px, 5vw, 64px); align-items: center;
}
.fp-copy p:not(.kicker) { color: rgba(243,240,231,.66); }
.fp-math { display: grid; gap: 20px; padding: clamp(22px, 3vw, 34px); border: 1px solid rgba(243,240,231,.2); }
.eq-row { display: grid; gap: 12px; }
.eq-label { font: 500 9.5px/1 var(--mono); letter-spacing: .12em; color: rgba(243,240,231,.5); }
.eq { display: flex; align-items: center; flex-wrap: wrap; gap: 10px; font-family: var(--serif); font-size: clamp(20px, 2.2vw, 28px); }
.eq .op { opacity: .7; }
.eq .term.big { font-size: 1.16em; }
.eq sub, .eq sup { font-size: .58em; }
.frac { display: inline-grid; text-align: center; line-height: 1.05; }
.frac i { font-style: italic; }
.frac b { display: block; height: 1px; margin: 3px 0; background: currentColor; }
.frac.big { font-size: 1.16em; }
.eq-row.solved .eq { color: var(--lime); }
.evolution-section .caution { border-color: rgba(243,240,231,.25); }
.caution {
  max-width: 1240px; margin: clamp(50px, 7vw, 90px) auto 0;
  display: flex; gap: 22px; padding: 26px 30px; border: 1px solid var(--line);
}
.caution > span { font-size: 26px; line-height: 1.2; color: var(--amber); }
.caution strong { display: block; font-weight: 500; font-size: 17px; }
.caution p { margin: 10px 0 0; color: rgba(243,240,231,.6); font-size: 14.5px; }

/* ---------- chiron ---------- */
.chiron-section { background: #14150f; color: var(--paper); }
.chiron-section .kicker, .chiron-section .section-marker { color: var(--lime); }
.chiron-section .lead,
.chiron-section .chapter-heading p:not(.kicker) { color: rgba(243,240,231,.62); }
.chiron-section .result-stats { background: rgba(243,240,231,.14); border-color: rgba(243,240,231,.14); }
.chiron-section .result-stats div { background: #14150f; }
.chiron-section .result-stats strong { color: var(--lime); }
.chiron-section .result-stats span { color: rgba(243,240,231,.6); }
.chiron-section .paper-figure { color: var(--ink); }

.energy-lab {
  max-width: 1300px; margin: 0 auto;
  display: grid; grid-template-columns: .92fr 1.08fr; gap: clamp(28px, 4vw, 60px); align-items: center;
  border: 1px solid rgba(243,240,231,.18);
}
.energy-copy { padding: clamp(26px, 4vw, 50px); }
.energy-copy p:not(.kicker):not(.energy-readout) { color: rgba(243,240,231,.62); }
.energy-controls { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 30px; }
.energy-btn {
  padding: 11px 17px; border: 1px solid rgba(243,240,231,.32); border-radius: 999px;
  background: transparent; cursor: pointer; font: 500 12.5px/1 var(--sans);
}
.energy-btn.active { background: var(--lime); border-color: var(--lime); color: var(--ink); }
.energy-readout {
  min-height: 54px; margin: 22px 0 0; padding-left: 16px;
  border-left: 3px solid var(--lime); font-size: 15px;
}
.energy-demo { position: relative; align-self: stretch; display: grid; place-items: center; padding: 24px; background: #0d0e09; overflow: hidden; }
.energy-demo svg { width: 100%; height: auto; }
.axis line { stroke: rgba(243,240,231,.22); stroke-width: 1; }
.axis text { fill: rgba(243,240,231,.42); font: 500 10px var(--mono); letter-spacing: .1em; }
.energy-curve { fill: none; stroke: rgba(243,240,231,.5); stroke-width: 2.5; }
.energy-ball circle { fill: var(--orange); filter: drop-shadow(0 0 14px rgba(255,106,69,.55)); }
.noise-cloud circle { fill: var(--lime); opacity: 0; }
.well-label { fill: rgba(243,240,231,.44); font: 500 10px var(--mono); letter-spacing: .07em; text-anchor: middle; }
.demo-caption {
  position: absolute; left: 24px; bottom: 14px;
  font: 500 9.5px/1 var(--mono); letter-spacing: .12em; color: rgba(243,240,231,.4);
}

.equi-lab {
  max-width: 1300px; margin: clamp(50px, 7vw, 96px) auto 0;
  display: grid; grid-template-columns: 1fr 1fr; gap: clamp(28px, 4vw, 60px); align-items: center;
  padding: clamp(26px, 4vw, 46px); border: 1px solid rgba(243,240,231,.18);
}
.equi-copy p:not(.kicker) { color: rgba(243,240,231,.62); }
.rotate-btn {
  margin-top: 22px; padding: 12px 20px; border: 1px solid var(--lime); border-radius: 999px;
  background: transparent; color: var(--lime); cursor: pointer; font: 500 12.5px/1 var(--sans);
}
.rotate-btn:hover { background: var(--lime); color: var(--ink); }
.equi-demo { display: grid; grid-template-columns: 1fr auto 1fr; align-items: center; gap: 14px; }
.equi-panel { text-align: center; }
.equi-panel > span { display: block; margin-bottom: 10px; font: 500 9.5px/1 var(--mono); letter-spacing: .13em; color: rgba(243,240,231,.45); }
.equi-shape { width: 100%; max-width: 230px; margin: auto; border: 1px solid rgba(243,240,231,.16); border-radius: 50%; background: rgba(243,240,231,.03); }
.equi-shape g { transition: transform .85s cubic-bezier(.5,0,.2,1); transform-origin: 105px 105px; }
.equi-shape line { stroke: rgba(243,240,231,.55); stroke-width: 3; }
.equi-shape circle { fill: rgba(243,240,231,.75); }
.equi-shape circle.hot { fill: var(--orange); }
.equi-shape circle.clash-mark { fill: none; stroke: var(--clash); stroke-width: 3; }
.equi-arrow { text-align: center; color: rgba(243,240,231,.5); }
.equi-arrow span { display: block; margin-bottom: 8px; font: 500 9.5px/1 var(--mono); letter-spacing: .1em; }
.equi-arrow svg { width: 60px; }
.equi-arrow path { fill: none; stroke: currentColor; stroke-width: 2; }

.scrub-lab {
  max-width: 1300px; margin: clamp(50px, 7vw, 96px) auto 0;
  display: grid; grid-template-columns: .92fr 1.08fr; gap: clamp(28px, 4vw, 60px); align-items: center;
  border: 1px solid rgba(243,240,231,.18);
}
.scrub-copy { padding: clamp(26px, 4vw, 50px); }
.scrub-copy p:not(.kicker):not(.scrub-readout) { color: rgba(243,240,231,.62); }
.scrub-steps { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 28px; }
.scrub-btn {
  padding: 10px 15px; border: 1px solid rgba(243,240,231,.3); border-radius: 999px;
  background: transparent; cursor: pointer; font: 500 11.5px/1 var(--mono);
}
.scrub-btn.active { background: var(--paper); border-color: var(--paper); color: var(--ink); }
.scrub-readout { min-height: 52px; margin: 20px 0 0; padding-left: 16px; border-left: 3px solid var(--orange); font-size: 15px; }
.scrub-demo { position: relative; align-self: stretch; min-height: 340px; background: #fff; }
.scrub-demo img {
  position: absolute; inset: 0; margin: auto; width: 100%; height: 100%;
  object-fit: contain; opacity: 0; transition: opacity .4s ease;
}
.scrub-demo img.active { opacity: 1; }

/* ---------- case studies ---------- */
.cases { max-width: 1300px; margin: clamp(60px, 8vw, 110px) auto 0; }
.cases-head { margin-bottom: 46px; }
.cases-head h3 { margin: 0; }
.case {
  display: grid; grid-template-columns: 1fr 1fr; gap: clamp(28px, 4vw, 60px); align-items: center;
  padding: clamp(26px, 4vw, 44px) 0; border-top: 1px solid rgba(243,240,231,.16);
}
.case.reverse .case-copy { order: 2; }
.case-tag { display: block; margin-bottom: 18px; font: 500 10px/1 var(--mono); letter-spacing: .12em; color: var(--lime); }
.case h4 { margin: 0 0 16px; font: 400 clamp(21px, 2.3vw, 32px)/1.2 var(--sans); letter-spacing: -.03em; }
.case-copy p { margin: 0 0 14px; color: rgba(243,240,231,.62); font-size: 15px; }
.case-toggle { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 22px; }
.case-btn {
  padding: 10px 16px; border: 1px solid rgba(243,240,231,.3); border-radius: 999px;
  background: transparent; cursor: pointer; font: 500 12px/1 var(--sans);
}
.case-btn.active { background: var(--paper); border-color: var(--paper); color: var(--ink); }
.case-stage {
  position: relative; min-height: 360px; padding: 18px;
  background: #fff; border-radius: 2px;
}
.case-stage img {
  position: absolute; inset: 18px; margin: auto; width: calc(100% - 36px); height: calc(100% - 36px);
  object-fit: contain; opacity: 0; transition: opacity .4s ease;
}
.case-stage img.active { opacity: 1; }

/* ---------- edges ---------- */
.edges-section { background: #101010; color: var(--paper); }
.edges-section .kicker, .edges-section .section-marker { color: var(--orange); }
.edges-section .lead { color: rgba(243,240,231,.6); }
.limit-list { max-width: 1080px; margin: auto; }
.limit-list article {
  display: grid; grid-template-columns: 62px 1fr; gap: 22px;
  padding: 30px 0; border-top: 1px solid rgba(243,240,231,.16);
}
.limit-list article > span { font: 500 12px/1.6 var(--mono); color: var(--orange); }
.limit-list h3 { margin: 0 0 10px; font-size: 21px; }
.limit-list p { margin: 0; color: rgba(243,240,231,.58); font-size: 15px; }

/* ---------- next ---------- */
.next-section { background: #efeadf; }
.next-loop { max-width: 1240px; margin: auto; display: grid; grid-template-columns: repeat(3, 1fr); border: 1px solid var(--line); }
.loop-step { padding: 34px 30px; border-right: 1px solid var(--line); background: var(--paper-bright); }
.loop-step:last-child { border-right: 0; }
.loop-step span {
  display: grid; place-items: center; width: 38px; height: 38px; margin-bottom: 26px;
  border-radius: 50%; background: var(--ink); color: var(--lime); font: 500 11px/1 var(--mono);
}
.loop-step h3 { margin: 0 0 12px; font-size: 21px; }
.loop-step p { margin: 0; color: var(--muted); font-size: 14.5px; }
.next-note { max-width: 860px; margin: 44px auto 0; color: var(--muted); }

/* ---------- takeaway + sources ---------- */
.takeaway { padding: clamp(80px, 12vw, 170px) clamp(18px, 8vw, 130px); background: var(--lime); }
.takeaway h2 { max-width: 1150px; margin: 0; font: 400 clamp(30px, 4.6vw, 66px)/1.08 var(--sans); letter-spacing: -.045em; }
.takeaway-flow { display: flex; align-items: center; flex-wrap: wrap; gap: 14px; margin: 56px 0 40px; }
.takeaway-flow span { padding: 13px 18px; border: 1px solid var(--ink); border-radius: 999px; font-size: 14px; }
.takeaway-flow i { font-style: normal; font-size: 20px; opacity: .5; }
.takeaway > p:last-child { max-width: 900px; margin: 0; font-size: clamp(16px, 1.4vw, 19px); }

.sources { padding: clamp(70px, 9vw, 130px) clamp(18px, 8vw, 130px); }
.sources-intro {
  max-width: 1240px; margin: 0 auto 48px;
  display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: clamp(24px, 5vw, 70px); align-items: end;
}
.sources h2 { margin: 0; font: 400 clamp(34px, 4.4vw, 62px)/1.02 var(--sans); letter-spacing: -.04em; }
.sources-note { max-width: 520px; margin: 0; color: var(--muted); font-size: 14.5px; }

.paper-cards {
  max-width: 1240px; margin: 0 auto; display: grid; grid-template-columns: 1fr 1fr; gap: 20px;
}
.paper-card {
  display: flex; flex-direction: column; padding: clamp(24px, 3vw, 36px);
  background: var(--paper-bright); border: 1px solid var(--line); box-shadow: var(--shadow);
}
.paper-card-head {
  display: flex; justify-content: space-between; align-items: baseline; gap: 16px; margin-bottom: 26px;
  font: 500 9.5px/1 var(--mono); letter-spacing: .12em;
}
.paper-badge { padding: 6px 10px; border-radius: 999px; background: var(--ink); color: var(--lime); }
.paper-pages { color: var(--muted); }
.paper-card h3 { margin: 0 0 16px; font: 400 clamp(20px, 1.9vw, 26px)/1.24 var(--sans); letter-spacing: -.025em; }
.paper-authors { margin: 0 0 6px; font-size: 14px; }
.paper-meta { margin: 0 0 28px; color: var(--muted); font: 500 11.5px/1.6 var(--mono); }
.paper-actions { display: flex; flex-wrap: wrap; gap: 9px; margin-top: auto; }
.paper-btn {
  display: inline-flex; align-items: center; gap: 10px; padding: 11px 16px;
  border: 1px solid var(--line); border-radius: 999px; text-decoration: none;
  font: 500 12.5px/1 var(--sans); transition: background .2s ease, border-color .2s ease;
}
.paper-btn span { opacity: .55; }
.paper-btn:hover { border-color: var(--ink); background: rgba(27,27,24,.05); }
.paper-btn.primary { border-color: var(--ink); background: var(--ink); color: var(--paper); }
.paper-btn.primary span { color: var(--lime); opacity: 1; }
.paper-btn.primary:hover { background: var(--deep); border-color: var(--deep); }

.source-links { max-width: 1240px; margin: 48px auto 0; border-top: 1px solid var(--line); }
.source-links a, .source-pending {
  display: grid; grid-template-columns: 46px 1.15fr .85fr; gap: 20px; align-items: baseline;
  padding: 22px 0; border-bottom: 1px solid var(--line); text-decoration: none;
}
.source-links a:hover strong { text-decoration: underline; text-underline-offset: 5px; }
.source-links span, .source-links small { color: var(--muted); font: 500 11px/1.5 var(--mono); }
.source-links strong { font-weight: 500; font-size: 16px; }
.source-pending { opacity: .55; }


.colophon { padding: 0 clamp(18px, 8vw, 130px) clamp(50px, 7vw, 90px); }
.colophon > div { max-width: 900px; padding-top: 34px; border-top: 1px solid var(--line); }
.colophon p { margin: 0; color: var(--muted); font-size: 13.5px; }
.colophon .funding { margin-top: 14px; opacity: .75; font-size: 12.5px; }

footer {
  padding: 26px clamp(18px, 5vw, 70px); display: flex; justify-content: space-between; flex-wrap: wrap; gap: 12px;
  border-top: 1px solid var(--line); font: 500 9.5px/1.6 var(--mono); letter-spacing: .1em;
}
footer p { margin: 0; }
footer a { text-decoration: none; }
footer a:hover { text-decoration: underline; text-underline-offset: 5px; }

/* ---------- motion ---------- */
.reveal { opacity: 0; transform: translateY(26px); transition: opacity .7s ease, transform .7s ease; }
.reveal.visible { opacity: 1; transform: none; }
@keyframes clashPulse { 50% { transform: scale(1.45); opacity: .68; } }
@keyframes glowPulse { 50% { opacity: .5; } }

/* ---------- responsive ---------- */
@media (max-width: 1020px) {
  .topbar nav { display: none; }
  .hero-grid, .quality-split, .graph-lab, .dist-grid, .pk-block, .payoff,
  .fp-block, .energy-lab, .equi-lab, .scrub-lab, .case,
  .sources-intro, .paper-cards { grid-template-columns: 1fr; }
  .sources-intro { align-items: start; }
  .case.reverse .case-copy { order: 0; }
  .hero-grid { gap: 54px; }
  .hero-stage { max-width: 420px; margin: auto; }
  .section-marker { position: static; flex-direction: row; align-items: center; margin-bottom: 40px; }
  .section-marker p { writing-mode: initial; }
  .thesis-split, .prior-work, .next-loop { grid-template-columns: 1fr; }
  .prior-work article, .loop-step { border-right: 0; border-bottom: 1px solid var(--line-soft); }
  .prior-work article:last-child, .loop-step:last-child { border-bottom: 0; }
  .pipeline-explain, .figure-reading, .craft-note { grid-template-columns: 1fr; }
  .energy-demo, .scrub-demo { min-height: 320px; }
  .graph-lab { padding-bottom: 34px; }
}

@media (max-width: 720px) {
  html { scroll-padding-top: 74px; }
  .topbar { height: 64px; padding: 0 14px; }
  .brand > span:last-child { display: none; }
  .paper-link { padding: 8px 12px; font-size: 11px; }
  .hero { padding-inline: 16px; }
  .hero-facts, .gap-stats, .result-stats { grid-template-columns: 1fr; }
  .hero-facts div, .hero-facts div + div { padding: 16px 0; border-right: 0; border-bottom: 1px solid var(--line-soft); }
  .hero-facts div:last-child { border-bottom: 0; }
  .chapter { padding-inline: 16px; }
  .pipeline-tabs { grid-template-columns: repeat(2, 1fr); }
  .pipeline-tab:nth-child(2) { border-right: 0; }
  .pipeline-tab:nth-child(-n+2) { border-bottom: 1px solid var(--line); }
  .bar-row { grid-template-columns: 108px 1fr 52px; gap: 10px; }
  .bar-row span { font-size: 12px; }
  .case-stage, .scrub-demo { min-height: 270px; }
  .source-links a, .source-pending { grid-template-columns: 34px 1fr; }
  .source-links small { grid-column: 2; }
  .takeaway, .sources, .colophon { padding-inline: 16px; }
  .caution { flex-direction: column; gap: 12px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: .01ms !important; animation-iteration-count: 1 !important;
    transition-duration: .01ms !important;
  }
  .reveal { opacity: 1; transform: none; }
}