@font-face {
  font-family: Newsreader;
  font-style: normal;
  font-weight: 300 600;
  font-display: swap;
  src: url('/assets/fonts/newsreader-normal.woff2') format('woff2');
}

@font-face {
  font-family: Newsreader;
  font-style: italic;
  font-weight: 300 600;
  font-display: swap;
  src: url('/assets/fonts/newsreader-italic.woff2') format('woff2');
}

@font-face {
  font-family: Inter;
  font-style: normal;
  font-weight: 400 600;
  font-display: swap;
  src: url('/assets/fonts/inter-normal.woff2') format('woff2');
}

:root {
  --paper: #f1ece2;
  --paper-light: #faf7f0;
  --paper-deep: #e4dbca;
  --ink: #20241f;
  --muted: #706d64;
  --rule: #cbc1b1;
  --night: #0b100e;
  --night-soft: #111a16;
  --night-raised: #17231d;
  --fog: #e9e5db;
  --fog-muted: #9ea79d;
  --lichen: #9db47b;
  --lichen-bright: #c5e296;
  --ember: #c45b38;
  --ember-bright: #ef8054;
  --gold: #d2a34d;
  --serif: Newsreader, Georgia, serif;
  --sans: Inter, system-ui, sans-serif;
  --mono: 'SFMono-Regular', Consolas, monospace;
  color-scheme: light;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 64px; background: var(--night); }
body { margin: 0; color: var(--ink); background: var(--paper); font: 15px/1.6 var(--sans); }
a { color: inherit; text-underline-offset: 4px; }
button, select, input { font: inherit; }
button, select, a, input { -webkit-tap-highlight-color: transparent; }
button { color: inherit; }
:focus-visible { outline: 2px solid var(--ember-bright); outline-offset: 4px; }
[hidden] { display: none !important; }
.skip-link { position: fixed; top: -100px; left: 16px; z-index: 100; padding: 10px 15px; background: var(--paper-light); color: var(--ink); }
.skip-link:focus { top: 12px; }
.eyebrow { margin: 0; color: var(--muted); font: 10px/1.5 var(--mono); letter-spacing: .13em; text-transform: uppercase; }
.eyebrow.light { color: var(--fog-muted); }
.button { display: inline-flex; min-height: 44px; align-items: center; justify-content: center; gap: 20px; padding: 11px 16px; border: 1px solid transparent; text-decoration: none; font: 11px/1.4 var(--sans); }
.button-primary { background: var(--ember); color: white; }
.button-primary:hover { background: #a8472c; }
.button-ghost { border-color: #556159; color: var(--fog); }
.button-ghost:hover { border-color: var(--lichen); color: var(--lichen-bright); }
.text-link { color: var(--muted); font-size: 11px; }

/* Lab navigation */
.lab-nav {
  position: fixed;
  inset: 0 0 auto;
  z-index: 30;
  display: grid;
  grid-template-columns: auto auto 1fr auto auto;
  min-height: 64px;
  align-items: center;
  gap: 20px;
  padding: 9px max(20px, calc((100vw - 1440px) / 2));
  border-bottom: 1px solid rgba(233, 229, 219, .13);
  background: rgba(11, 16, 14, .9);
  color: var(--fog);
  backdrop-filter: blur(18px);
}
.site-mark { display: grid; place-items: center; width: 38px; height: 38px; border: 1px solid var(--ember-bright); border-radius: 50%; color: var(--ember-bright); text-decoration: none; font: italic 29px/1 var(--serif); padding: 0 2px 4px 0; }
.lab-wordmark { display: grid; color: var(--fog); text-decoration: none; line-height: 1.1; }
.lab-wordmark span { font: 14px var(--serif); }
.lab-wordmark small { margin-top: 3px; color: var(--fog-muted); font: 8px var(--mono); letter-spacing: .14em; text-transform: uppercase; }
.chapter-nav { justify-self: center; display: flex; gap: clamp(16px, 3vw, 42px); }
.chapter-nav a { position: relative; color: #a9b0a8; text-decoration: none; font: 9px var(--mono); letter-spacing: .09em; text-transform: uppercase; }
.chapter-nav a::after { content: ''; position: absolute; left: 0; right: 100%; bottom: -7px; height: 1px; background: var(--lichen); transition: right 180ms ease; }
.chapter-nav a:hover { color: var(--fog); }
.chapter-nav a:hover::after { right: 0; }
.nav-status { justify-self: end; color: var(--lichen-bright); font: 8px var(--mono); letter-spacing: .11em; text-transform: uppercase; }
.run-picker { display: flex; align-items: center; gap: 8px; color: var(--fog-muted); font: 8px var(--mono); letter-spacing: .08em; text-transform: uppercase; }
.run-picker select { max-width: 220px; padding: 7px 26px 7px 9px; border: 1px solid #3c4941; border-radius: 0; background: var(--night); color: var(--fog); font: 10px var(--sans); letter-spacing: 0; text-transform: none; }

/* Loading state */
.loading-screen { min-height: 100svh; display: grid; place-content: center; justify-items: center; gap: 22px; background: var(--night); color: var(--fog-muted); }
.loading-screen p { margin: 0; font: 10px var(--mono); letter-spacing: .12em; text-transform: uppercase; }
@keyframes load-pulse { 50% { opacity: .25; transform: scale(.9); } }

/* Threshold / invitation */
.world-hero {
  position: relative;
  min-height: 0;
  overflow: hidden;
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  grid-template-rows: 1fr auto;
  gap: 30px;
  align-items: center;
  max-width: none;
  padding: 110px max(28px, calc((100vw - 1340px) / 2)) 40px;
  background: var(--paper);
}
.hero-copy { position: relative; z-index: 1; grid-column: 1 / span 7; align-self: center; padding-bottom: 36px; }
.hero-copy .eyebrow { display: flex; align-items: center; gap: 10px; }
.hero-copy .eyebrow i { width: 26px; height: 1px; background: var(--ember); }
.hero-record { margin: 25px 0 8px; color: var(--muted); font: 11px var(--mono); letter-spacing: .04em; }
.hero-copy h1 { max-width: 920px; margin: 0; font: 400 clamp(42px, 4.8vw, 64px)/1.08 var(--serif); letter-spacing: -.055em; text-wrap: balance; }
.hero-copy h1 em { display: block; color: var(--ember); font-weight: 300; }
.hero-question { max-width: 680px; margin: 32px 0 0; color: #52564e; font: 22px/1.45 var(--serif); }
.hero-actions { display: flex; align-items: center; gap: 24px; margin-top: 36px; }
.hero-specimen { position: relative; z-index: 1; grid-column: 9 / -1; justify-self: center; display: grid; place-items: center; width: min(29vw, 390px); aspect-ratio: 1; }
.specimen-frame { position: relative; width: 78%; aspect-ratio: 1; border: 10px solid var(--night); background-color: var(--night); background-repeat: no-repeat; image-rendering: pixelated; }
.hero-specimen > p { position: absolute; right: -10px; bottom: 8%; display: grid; margin: 0; padding: 9px 12px; background: var(--paper-light); border: 1px solid var(--rule); }
.hero-specimen > p span { color: var(--muted); font: 8px var(--mono); letter-spacing: .08em; text-transform: uppercase; }
.hero-specimen > p strong { margin-top: 3px; font: 14px var(--serif); }
.hero-facts { position: relative; z-index: 1; grid-column: 1 / span 8; display: grid; grid-template-columns: repeat(3, 1fr); margin: 0; border-top: 1px solid var(--rule); }
.hero-facts div { padding: 15px 28px 0 0; }
.hero-facts dt { color: var(--muted); font: 8px var(--mono); letter-spacing: .1em; text-transform: uppercase; }
.hero-facts dd { margin: 5px 0 0; font: 16px var(--serif); }

/* Shared chapter structure */
.dark-section { position: relative; background: var(--night); color: var(--fog); }
.paper-section { background: var(--paper); color: var(--ink); }
.chapter-heading { display: grid; grid-template-columns: 2fr 8fr 2fr; gap: 25px; max-width: 1340px; margin: 0 auto 42px; }
.chapter-heading > div { grid-column: 2; }
.chapter-heading h2 { max-width: 920px; margin: 0; font: 400 clamp(42px, 5.5vw, 76px)/.98 var(--serif); letter-spacing: -.04em; }
.chapter-heading > div > p { max-width: 720px; margin: 17px 0 0; color: var(--fog-muted); font: 18px/1.55 var(--serif); }
.chapter-heading.ink-heading > div > p { color: var(--muted); }

/* Observation theater */
.observation-section { min-height: 100svh; padding: clamp(84px, 10vw, 150px) max(24px, calc((100vw - 1440px) / 2)); overflow: hidden; }
.observation-section::before { content: ''; position: absolute; inset: 0; opacity: .12; background-image: radial-gradient(circle at center, var(--lichen) 0 1px, transparent 1px); background-size: 24px 24px; mask-image: linear-gradient(to bottom, black, transparent 58%); pointer-events: none; }
.theater-shell { position: relative; max-width: 1340px; margin: auto; border: 1px solid #344039; background: #070a09; box-shadow: 0 45px 120px rgba(0, 0, 0, .38); }
.world-stage { position: relative; min-height: min(72svh, 780px); overflow: hidden; display: grid; place-items: center; isolation: isolate; background: #060907; }
.ambient-frame { position: absolute; inset: -60px; z-index: -3; background-repeat: no-repeat; background-position: center; filter: blur(38px) saturate(.7); opacity: .3; transform: scale(1.1); image-rendering: pixelated; }
.stage-vignette { position: absolute; inset: 0; z-index: -1; background: radial-gradient(circle at center, transparent 25%, rgba(5, 8, 6, .35) 68%, rgba(5, 8, 6, .92) 100%); pointer-events: none; }
.stage-grid { position: absolute; inset: 0; z-index: -2; opacity: .08; background-image: linear-gradient(rgba(197, 226, 150, .35) 1px, transparent 1px), linear-gradient(90deg, rgba(197, 226, 150, .35) 1px, transparent 1px); background-size: 42px 42px; pointer-events: none; }
.pixel-viewport { position: relative; width: min(61vh, 55vw, 620px); aspect-ratio: 1; background: #080b09; box-shadow: 0 0 0 1px rgba(233, 229, 219, .17), 0 38px 100px rgba(0, 0, 0, .48); }
.pixel-frame { width: 100%; height: 100%; background-repeat: no-repeat; image-rendering: pixelated; }
.corner { position: absolute; width: 24px; height: 24px; border-color: var(--lichen-bright); opacity: .75; }
.corner-tl { top: -9px; left: -9px; border-top: 1px solid; border-left: 1px solid; }
.corner-tr { top: -9px; right: -9px; border-top: 1px solid; border-right: 1px solid; }
.corner-bl { bottom: -9px; left: -9px; border-bottom: 1px solid; border-left: 1px solid; }
.corner-br { right: -9px; bottom: -9px; border-right: 1px solid; border-bottom: 1px solid; }
.stage-hud { position: absolute; left: 24px; right: 24px; z-index: 4; display: flex; justify-content: space-between; gap: 20px; color: #bac2b9; font: 9px/1.4 var(--mono); letter-spacing: .08em; text-transform: uppercase; pointer-events: none; }
.stage-hud p { margin: 0; }
.hud-top { top: 21px; }
.hud-bottom { bottom: 21px; }
.signal-dot { display: inline-block; width: 6px; height: 6px; margin-right: 8px; border-radius: 50%; background: var(--ember-bright); box-shadow: 0 0 0 4px rgba(239, 128, 84, .13); }
.stage-play { position: absolute; z-index: 5; display: grid; justify-items: center; gap: 8px; padding: 0; border: 0; background: transparent; color: white; cursor: pointer; }
.stage-play > span { display: grid; place-items: center; width: 82px; height: 82px; padding-left: 5px; border: 1px solid rgba(255, 255, 255, .65); border-radius: 50%; background: rgba(6, 9, 7, .72); font-size: 20px; backdrop-filter: blur(8px); transition: transform 180ms ease, background 180ms ease; }
.stage-play:hover > span { transform: scale(1.06); background: rgba(196, 91, 56, .88); }
.stage-play small { font: 9px var(--mono); letter-spacing: .11em; text-transform: uppercase; }
.theater-shell.is-playing .stage-play { opacity: 0; pointer-events: none; }
.theater-console { display: grid; grid-template-columns: 1.05fr 1.7fr 1.15fr; align-items: stretch; border-top: 1px solid #344039; background: var(--night-soft); }
.transport, .timeline-wrap, .step-inspector { min-width: 0; padding: 20px; }
.transport { display: flex; flex-wrap: wrap; align-content: center; gap: 7px; border-right: 1px solid #344039; }
.transport button, .transport select { min-height: 40px; border: 1px solid #435047; border-radius: 0; background: transparent; color: var(--fog); cursor: pointer; }
.transport button { min-width: 42px; padding: 8px 12px; }
.transport .transport-play { min-width: 78px; border-color: var(--ember); background: var(--ember); }
.transport label { display: grid; gap: 3px; margin-left: 5px; color: var(--fog-muted); font: 7px var(--mono); letter-spacing: .08em; text-transform: uppercase; }
.transport select { padding: 5px 9px; font: 10px var(--sans); }
.transport .fullscreen-control { flex-basis: 100%; color: var(--fog-muted); font-size: 9px; }
.timeline-wrap { position: relative; align-self: center; border-right: 1px solid #344039; }
.timeline-labels { display: flex; justify-content: space-between; margin-bottom: 12px; color: var(--fog-muted); font: 8px var(--mono); letter-spacing: .08em; text-transform: uppercase; }
.timeline-wrap input[type='range'] { --progress: 0%; width: 100%; height: 18px; margin: 0; appearance: none; background: transparent; cursor: pointer; }
.timeline-wrap input[type='range']::-webkit-slider-runnable-track { height: 3px; background: linear-gradient(to right, var(--lichen-bright) 0 var(--progress), #3a453e var(--progress) 100%); }
.timeline-wrap input[type='range']::-moz-range-track { height: 3px; background: #3a453e; }
.timeline-wrap input[type='range']::-moz-range-progress { height: 3px; background: var(--lichen-bright); }
.timeline-wrap input[type='range']::-webkit-slider-thumb { width: 14px; height: 14px; margin-top: -5.5px; appearance: none; border: 2px solid var(--night-soft); border-radius: 50%; background: var(--fog); box-shadow: 0 0 0 1px var(--fog); }
.timeline-wrap input[type='range']::-moz-range-thumb { width: 12px; height: 12px; border: 2px solid var(--night-soft); border-radius: 50%; background: var(--fog); box-shadow: 0 0 0 1px var(--fog); }
.reward-events { position: relative; height: 17px; margin: 1px 7px 0; }
.reward-events button { position: absolute; top: 0; left: var(--position); width: 10px; height: 10px; padding: 0; border: 0; border-radius: 50%; background: var(--gold); transform: translateX(-50%); cursor: pointer; }
.reward-events button.negative { background: var(--ember-bright); }
.reward-events button::after { content: ''; position: absolute; inset: -7px; }
.step-inspector { display: grid; grid-template-columns: auto 1fr; align-items: center; gap: 7px 18px; }
.step-number { grid-row: 1 / span 2; display: grid; margin: 0; }
.step-number > span { color: var(--fog-muted); font: 7px var(--mono); letter-spacing: .1em; text-transform: uppercase; }
.step-number strong { font: 40px/.95 var(--serif); }
.step-number small { color: var(--fog-muted); font: 8px var(--mono); }
.step-inspector dl { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 10px; margin: 0; }
.step-inspector dl div { min-width: 0; }
.step-inspector dt { color: var(--fog-muted); font: 7px var(--mono); letter-spacing: .08em; text-transform: uppercase; }
.step-inspector dd { margin: 4px 0 0; overflow-wrap: anywhere; font: 13px/1.25 var(--serif); }
.step-event { grid-column: 2; margin: 0; color: var(--lichen-bright); font: 9px/1.4 var(--mono); }
.run-stats { position: relative; max-width: 1340px; display: grid; grid-template-columns: .8fr .8fr .8fr 1.6fr; gap: 1px; margin: 1px auto 0; background: #344039; border: 1px solid #344039; }
.run-stats div { min-width: 0; padding: 17px 19px; background: var(--night-soft); }
.run-stats dt { color: var(--fog-muted); font: 8px var(--mono); letter-spacing: .09em; text-transform: uppercase; }
.run-stats dd { margin: 6px 0 0; overflow-wrap: anywhere; font: 18px/1.3 var(--serif); }
.embed-explore { display: none; }

/* Model diagram */
.model-section { padding: clamp(90px, 11vw, 170px) max(25px, calc((100vw - 1340px) / 2)); }
.model-machine { display: grid; grid-template-columns: 1fr auto 1fr auto 1.25fr auto 1fr; align-items: center; gap: clamp(10px, 2vw, 28px); max-width: 1180px; margin: 80px auto 0; }
.machine-input, .machine-output, .machine-core { position: relative; min-height: 210px; display: flex; flex-direction: column; justify-content: center; padding: 25px; border: 1px solid var(--rule); background: var(--paper-light); }
.machine-input strong { margin-top: 17px; font: 48px/.9 var(--serif); }
.machine-input > span { margin-top: 8px; color: var(--muted); font: 12px var(--sans); }
.machine-plus, .machine-arrow { color: var(--muted); font: 27px var(--serif); }
.machine-core { overflow: hidden; align-items: center; border-color: #354239; background: var(--night-soft); color: var(--fog); text-align: center; }
.machine-core p { position: relative; margin: 0; color: var(--fog-muted); font: 9px var(--mono); letter-spacing: .08em; text-transform: uppercase; }
.machine-core strong { position: relative; margin-top: 13px; color: var(--lichen-bright); font: 52px/.9 var(--serif); }
.machine-core > span:not(.core-pulse) { position: relative; margin-top: 7px; color: var(--fog-muted); font-size: 10px; }
.core-pulse { position: absolute; width: 160px; height: 160px; border: 1px solid rgba(197, 226, 150, .16); border-radius: 50%; box-shadow: 0 0 0 25px rgba(197, 226, 150, .04), 0 0 0 50px rgba(197, 226, 150, .025); }
.machine-output ul { display: grid; gap: 12px; margin: 18px 0 0; padding: 0; list-style: none; font: 18px var(--serif); }
.machine-output li::before { content: '↳'; margin-right: 8px; color: var(--ember); }
.training-receipt { display: grid; grid-template-columns: 2fr 1fr; gap: 70px; max-width: 900px; margin: 75px auto 0; padding-top: 25px; border-top: 1px solid var(--ink); }
.training-receipt > p:first-child { margin: 0; font: 27px/1.35 var(--serif); }
.training-receipt .margin-note { margin: 0; color: var(--muted); font-size: 11px; }

/* Result reveal */
.trap-section { padding: 20px max(25px, calc((100vw - 1340px) / 2)) clamp(100px, 12vw, 180px); }
.trap-intro { max-width: 760px; margin-left: auto; margin-right: auto; }
.trap-intro h2 { margin: 10px 0 0; font: 400 clamp(54px, 7vw, 100px)/.92 var(--serif); letter-spacing: -.05em; }
.trap-intro > p:last-child { max-width: 560px; margin: 22px 0 0; color: var(--muted); font: 20px/1.5 var(--serif); }
.change-balance { position: relative; display: flex; max-width: 1180px; height: 250px; margin: 75px auto 120px; border: 1px solid var(--rule); background: var(--paper-light); }
.still-mass { flex: 1; display: flex; flex-direction: column; justify-content: flex-end; padding: 28px; background: var(--night-soft); color: var(--fog); }
.still-mass strong { font: 400 clamp(68px, 9vw, 142px)/.8 var(--serif); letter-spacing: -.05em; }
.still-mass span, .change-spark span { margin-top: 16px; font: 9px var(--mono); letter-spacing: .1em; text-transform: uppercase; }
.change-spark { position: relative; width: max(.554%, 7px); min-width: 7px; background: var(--ember); color: var(--ember); }
.change-spark::after { content: ''; position: absolute; top: 0; bottom: 0; left: 50%; width: 1px; background: var(--ember-bright); box-shadow: 0 0 30px 7px rgba(239, 128, 84, .35); }
.change-spark strong, .change-spark span { position: absolute; right: 0; white-space: nowrap; text-align: right; }
.change-spark strong { top: calc(100% + 22px); font: 38px/.9 var(--serif); }
.change-spark span { top: calc(100% + 63px); color: var(--muted); }
.lens-lab { display: grid; grid-template-columns: 1fr 1fr; max-width: 1180px; margin: 0 auto; border: 1px solid #354239; background: var(--night-soft); color: var(--fog); }
.lens-copy, .lens-readout { padding: clamp(27px, 5vw, 64px); }
.lens-copy { border-right: 1px solid #354239; }
.lens-copy .eyebrow { color: var(--fog-muted); }
.lens-copy h3 { max-width: 480px; margin: 16px 0 0; font: 400 clamp(34px, 4.5vw, 58px)/1.02 var(--serif); letter-spacing: -.03em; }
.lens-copy > p:not(.eyebrow) { max-width: 490px; margin: 18px 0 0; color: var(--fog-muted); }
.lens-tabs { display: flex; flex-wrap: wrap; gap: 7px; margin-top: 35px; }
.lens-tabs button { min-height: 42px; padding: 9px 13px; border: 1px solid #4a574f; background: transparent; color: var(--fog-muted); cursor: pointer; font-size: 10px; }
.lens-tabs button.active { border-color: var(--lichen); background: var(--lichen); color: var(--night); }
.lens-readout { display: flex; flex-direction: column; justify-content: center; }
.lower-note { margin: 0 0 27px; color: var(--fog-muted); font: 8px var(--mono); letter-spacing: .08em; text-transform: uppercase; }
.lens-score { position: relative; display: grid; grid-template-columns: 1fr auto; gap: 8px 20px; margin-top: 20px; }
.lens-score span { color: var(--fog-muted); font-size: 10px; }
.lens-score strong { font: 12px var(--mono); }
.lens-score i { grid-column: 1 / -1; display: block; width: 100%; height: 8px; background: #303b35; }
.lens-score i::after { content: ''; display: block; width: var(--width, 2%); height: 100%; background: var(--ember-bright); transition: width 320ms ease; }
.baseline-score i::after { background: var(--lichen); }
.lens-verdict { margin: 34px 0 0; padding-top: 20px; border-top: 1px solid #354239; color: var(--lichen-bright); font: 18px/1.4 var(--serif); }
.finding-quote { max-width: 1010px; margin: clamp(90px, 12vw, 170px) auto 0; padding: 0; border: 0; }
.finding-quote p { margin: 0; font: 400 clamp(40px, 5.5vw, 72px)/1.06 var(--serif); letter-spacing: -.035em; }
.finding-quote p::before { content: '“'; color: var(--ember); }
.finding-quote p::after { content: '”'; color: var(--ember); }
.finding-quote footer { max-width: 760px; margin: 29px 0 0 auto; padding-left: 30px; border-left: 1px solid var(--ember); color: var(--muted); font: 17px/1.6 var(--serif); }

/* Charts */
.forecast-section { padding: clamp(90px, 11vw, 170px) max(25px, calc((100vw - 1340px) / 2)); }
.chart-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 18px; max-width: 1340px; margin: 0 auto; }
.chart-card { min-width: 0; padding: clamp(22px, 3.5vw, 44px); border: 1px solid #354239; background: var(--night-soft); }
.chart-heading { display: flex; justify-content: space-between; align-items: start; gap: 20px; }
.chart-heading h3 { margin: 8px 0 0; font: 30px/1.1 var(--serif); }
.chart-heading > p { display: grid; justify-items: end; margin: 0; }
.chart-heading > p strong { color: var(--lichen-bright); font: 28px var(--serif); }
.chart-heading > p span { color: var(--fog-muted); font: 7px var(--mono); letter-spacing: .07em; text-transform: uppercase; }
.chart-legend { display: flex; justify-content: flex-end; gap: 20px; margin-top: 16px; color: var(--fog-muted); font-size: 8px; }
.chart-legend span::before { content: ''; display: inline-block; width: 16px; height: 2px; margin: 0 7px 2px 0; background: var(--ember-bright); }
.chart-legend .legend-baseline::before { background: var(--lichen); }
.line-chart { min-height: 280px; margin-top: 28px; }
.line-chart svg { display: block; width: 100%; height: auto; overflow: visible; }
.chart-gridline { stroke: #2d3732; stroke-width: 1; vector-effect: non-scaling-stroke; }
.chart-axis-label { fill: #7f8a82; font: 9px var(--mono); }
.chart-path { fill: none; stroke-width: 3; stroke-linecap: round; stroke-linejoin: round; vector-effect: non-scaling-stroke; }
.chart-path.model { stroke: var(--ember-bright); }
.chart-path.baseline { stroke: var(--lichen); }
.chart-dot { stroke: var(--night-soft); stroke-width: 2; vector-effect: non-scaling-stroke; }
.chart-dot.model { fill: var(--ember-bright); }
.chart-dot.baseline { fill: var(--lichen); }
.chart-caption { margin: 18px 0 0; padding-top: 17px; border-top: 1px solid #354239; color: var(--fog-muted); font-size: 10px; }

/* Scorecard */
.score-section { padding: clamp(90px, 11vw, 160px) max(25px, calc((100vw - 1340px) / 2)); }
.score-table { max-width: 1180px; margin: 20px auto 0; border-top: 1px solid var(--ink); }
.score-row { display: grid; grid-template-columns: 1.5fr 1fr 1fr .85fr; align-items: center; gap: 20px; padding: 24px 0; border-bottom: 1px solid var(--rule); }
.score-name h3 { margin: 0; font: 23px/1.2 var(--serif); }
.score-name p { margin: 5px 0 0; color: var(--muted); font-size: 9px; }
.score-value { display: grid; }
.score-value span { color: var(--muted); font: 8px var(--mono); text-transform: uppercase; }
.score-value strong { margin-top: 5px; font: 14px var(--mono); }
.score-verdict { justify-self: end; display: inline-flex; align-items: center; gap: 8px; color: var(--muted); font: 9px var(--mono); letter-spacing: .05em; text-transform: uppercase; }
.score-verdict::before { content: ''; width: 8px; height: 8px; border-radius: 50%; background: #999; }
.score-row.winner-model .score-verdict { color: #7e3a29; }
.score-row.winner-model .score-verdict::before { background: var(--ember); }
.score-row.winner-baseline .score-verdict::before { background: var(--lichen); }
.score-row.winner-tie .score-verdict::before { border: 1px solid var(--muted); background: transparent; }

/* Evidence */
.evidence-section { padding: 20px max(25px, calc((100vw - 1340px) / 2)) clamp(100px, 12vw, 180px); }
.evidence-lead { max-width: 720px; margin: 0 auto 58px; }
.evidence-lead h2 { margin: 9px 0 0; font: 400 clamp(48px, 6vw, 82px)/.95 var(--serif); letter-spacing: -.045em; }
.evidence-lead > p:last-child { max-width: 650px; margin: 22px 0 0; color: var(--muted); font: 19px/1.55 var(--serif); }
.state-split { display: grid; grid-template-columns: repeat(2, 1fr); gap: 16px; max-width: 1050px; margin: 0 auto; }
.state-split article { position: relative; overflow: hidden; min-height: 330px; padding: 37px; border: 1px solid var(--rule); background: var(--paper-light); }
.state-split article > span { position: absolute; top: 27px; right: 30px; width: 42px; height: 42px; border: 1px solid var(--rule); border-radius: 50%; }
.vault-light { background: radial-gradient(circle, var(--lichen) 0 4px, transparent 5px); box-shadow: inset 0 0 0 8px rgba(157, 180, 123, .09); }
.vault-dark { background: var(--night-soft); box-shadow: inset 0 0 0 8px rgba(11, 16, 14, .08); }
.state-split h3 { margin: 15px 0 20px; font: 32px var(--serif); }
.state-split ul { display: grid; gap: 10px; margin: 0; padding: 0; list-style: none; color: var(--muted); }
.state-split li { position: relative; padding-left: 19px; }
.state-split li::before { content: '↳'; position: absolute; left: 0; color: var(--ember); }
.reproduction-drawer { max-width: 1050px; margin: 16px auto 0; border: 1px solid var(--rule); background: var(--paper-light); }
.reproduction-drawer summary { display: flex; justify-content: space-between; align-items: center; gap: 20px; min-height: 72px; padding: 18px 24px; cursor: pointer; list-style: none; }
.reproduction-drawer summary::-webkit-details-marker { display: none; }
.reproduction-drawer summary span { font: 21px var(--serif); }
.reproduction-drawer summary small { color: var(--muted); font-size: 9px; }
.reproduction-drawer summary::after { content: '+'; order: 3; color: var(--ember); font: 24px var(--serif); }
.reproduction-drawer[open] summary::after { content: '−'; }
.receipt-grid { display: grid; grid-template-columns: 1.5fr 1fr; gap: 40px; padding: 0 24px 27px; border-top: 1px solid var(--rule); }
.detail-list { margin: 0; }
.detail-list div { display: grid; grid-template-columns: 105px minmax(0, 1fr); gap: 16px; padding: 12px 0; border-bottom: 1px solid var(--rule); }
.detail-list dt { color: var(--muted); font: 8px var(--mono); letter-spacing: .08em; text-transform: uppercase; }
.detail-list dd { min-width: 0; margin: 0; overflow-wrap: anywhere; }
.detail-list code { font: 10px/1.5 var(--mono); }
.receipt-links { display: grid; align-content: start; gap: 0; padding-top: 8px; }
.receipt-links a { display: flex; justify-content: space-between; gap: 16px; padding: 13px 0; border-bottom: 1px solid var(--rule); color: var(--ember); font-size: 11px; }

/* Next hypothesis */
.next-section { min-height: 88svh; display: flex; flex-direction: column; justify-content: center; align-items: flex-start; padding: clamp(90px, 12vw, 180px) max(25px, calc((100vw - 1050px) / 2)); background: var(--night-soft); color: var(--fog); }
.next-section h2 { max-width: 980px; margin: 14px 0 0; font: 400 clamp(48px, 6.5vw, 92px)/.94 var(--serif); letter-spacing: -.045em; }
.next-section > p:not(.eyebrow) { max-width: 900px; margin: 35px 0 0; color: var(--lichen-bright); font: italic 32px/1.35 var(--serif); }
.limitations { width: 100%; display: grid; grid-template-columns: 1fr 3fr; gap: 30px; margin-top: 70px; padding-top: 25px; border-top: 1px solid #465149; }
.limitations ul { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 10px 35px; margin: 0; padding: 0; list-style: none; color: var(--fog-muted); font-size: 11px; }
.limitations li::before { content: '— '; color: var(--ember-bright); }
.next-section .button { margin-top: 50px; }

.load-error, .no-script { min-height: 100svh; display: grid; place-content: center; max-width: none; margin: 0; padding: 40px max(25px, calc((100vw - 720px) / 2)); background: var(--paper); }
.load-error h1, .no-script h1 { margin: 12px 0; font: 50px/1 var(--serif); }

/* Fullscreen stage */
.theater-shell:fullscreen { width: 100%; height: 100%; border: 0; background: var(--night); overflow: auto; }
.theater-shell:fullscreen .world-stage { min-height: calc(100vh - 154px); }

/* Compact blog embed */
.is-embedded { background: var(--night); }
.is-embedded .lab-nav,
.is-embedded .world-hero,
.is-embedded #model,
.is-embedded #finding,
.is-embedded #forecast,
.is-embedded .score-section,
.is-embedded #evidence,
.is-embedded .next-section { display: none; }
.is-embedded .observation-section { min-height: 100svh; padding: 20px; }
.is-embedded .observation-section::before { display: none; }
.is-embedded .observation-section > .chapter-heading { margin-bottom: 18px; }
.is-embedded .observation-section > .chapter-heading h2 { font-size: clamp(28px, 5vw, 48px); }
.is-embedded .observation-section > .chapter-heading > div > p { margin-top: 8px; font-size: 14px; }
.is-embedded .world-stage { min-height: min(56svh, 540px); }
.is-embedded .pixel-viewport { width: min(46vh, 50vw, 450px); }
.is-embedded .run-stats { display: none; }
.is-embedded .embed-explore { display: flex; justify-content: space-between; gap: 18px; max-width: 1340px; margin: 14px auto 0; padding: 12px 0; color: var(--lichen-bright); font-size: 11px; }

@media (max-width: 1080px) {
  .world-hero { align-items: center; }
  .hero-copy { grid-column: 1 / span 8; }
  .hero-specimen { grid-column: 9 / -1; width: min(30vw, 330px); }
  .chapter-heading { grid-template-columns: 1fr 5fr; }
  .chapter-heading > div { grid-column: 2; }
  .theater-console { grid-template-columns: 1fr 1.5fr; }
  .step-inspector { grid-column: 1 / -1; border-top: 1px solid #344039; }
  .timeline-wrap { border-right: 0; }
  .model-machine { grid-template-columns: 1fr auto 1fr; }
  .machine-arrow { transform: rotate(90deg); }
  .machine-core, .machine-output { grid-column: span 1; }
  .machine-core { grid-column: 1 / -1; min-height: 180px; }
  .model-machine > .machine-arrow:nth-of-type(2) { grid-column: 1 / -1; justify-self: center; }
  .machine-output { grid-column: 1 / -1; min-height: 170px; }
}

@media (max-width: 800px) {
  html { scroll-padding-top: 56px; }
  .lab-nav { grid-template-columns: auto 1fr auto; min-height: 56px; padding: 8px 16px; }
  .site-mark { width: 34px; height: 34px; font-size: 25px; }
  .lab-wordmark { display: none; }
  .chapter-nav { justify-self: start; gap: 15px; }
  .chapter-nav a:nth-child(2), .chapter-nav a:nth-child(4) { display: none; }
  .run-picker { grid-column: 2; grid-row: 2; }
  .nav-status { font-size: 7px; }
  .world-hero { grid-template-columns: 1fr; grid-template-rows: auto auto auto; gap: 45px; padding: 120px 25px 35px; }
  .hero-copy, .hero-specimen, .hero-facts, .scroll-cue { grid-column: 1; }
  .hero-copy { padding-bottom: 0; }
  .hero-copy h1 { font-size: clamp(38px, 8vw, 50px); }
  .hero-question { font-size: 19px; }
  .hero-specimen { width: min(70vw, 380px); margin: 20px auto; }
  .hero-facts { width: 100%; }
  .scroll-cue { justify-self: start; }
  .chapter-heading { grid-template-columns: 1fr; gap: 15px; }
  .chapter-heading > div { grid-column: 1; }
  .chapter-heading h2 { font-size: clamp(40px, 10vw, 61px); }
  .observation-section { padding-left: 18px; padding-right: 18px; }
  .world-stage { min-height: 66svh; }
  .pixel-viewport { width: min(73vw, 54vh, 520px); }
  .theater-console { grid-template-columns: 1fr; }
  .transport, .timeline-wrap { border-right: 0; border-bottom: 1px solid #344039; }
  .step-inspector { grid-column: 1; border-top: 0; }
  .run-stats { grid-template-columns: repeat(2, 1fr); }
  .model-machine { grid-template-columns: 1fr; gap: 12px; margin-top: 45px; }
  .model-machine > * { grid-column: 1 !important; }
  .machine-plus, .machine-arrow { justify-self: center; transform: none; }
  .machine-input, .machine-output, .machine-core { min-height: 170px; }
  .training-receipt { grid-template-columns: 1fr; gap: 25px; }
  .change-balance { margin-bottom: 130px; }
  .still-mass { padding: 22px; }
  .still-mass strong { font-size: clamp(54px, 15vw, 95px); }
  .lens-lab { grid-template-columns: 1fr; }
  .lens-copy { border-right: 0; border-bottom: 1px solid #354239; }
  .chart-grid { grid-template-columns: 1fr; }
  .score-row { grid-template-columns: 1fr 1fr; }
  .score-name { grid-column: 1 / -1; }
  .score-verdict { grid-column: 1 / -1; justify-self: start; }
  .state-split { grid-template-columns: 1fr; }
  .receipt-grid { grid-template-columns: 1fr; gap: 20px; }
  .limitations { grid-template-columns: 1fr; }
  .limitations ul { grid-template-columns: 1fr; }
  .is-embedded .chapter-heading { display: block; }
  .is-embedded .theater-console { display: none; }
  .is-embedded .world-stage { min-height: 500px; }
  .is-embedded .pixel-viewport { width: min(72vw, 390px); }
}

@media (max-width: 520px) {
  .chapter-nav a { font-size: 8px; }
  .hero-copy h1 { font-size: clamp(36px, 9vw, 44px); }
  .hero-actions { align-items: flex-start; flex-direction: column; gap: 17px; }
  .hero-facts { grid-template-columns: 1fr; }
  .hero-facts div { padding: 12px 0; border-bottom: 1px solid var(--rule); }
  .world-stage { min-height: 520px; }
  .stage-hud { left: 14px; right: 14px; font-size: 7px; }
  .pixel-viewport { width: min(83vw, 420px); }
  .transport, .timeline-wrap, .step-inspector { padding: 15px; }
  .transport label { margin-left: 0; }
  .step-inspector { grid-template-columns: 1fr; }
  .step-number { grid-row: auto; }
  .step-inspector dl { grid-template-columns: repeat(3, 1fr); }
  .step-event { grid-column: 1; }
  .run-stats { grid-template-columns: 1fr; }
  .change-balance { height: 210px; }
  .still-mass strong { font-size: 52px; }
  .change-spark strong { font-size: 30px; }
  .finding-quote p { font-size: 38px; }
  .chart-heading { display: block; }
  .chart-heading > p { justify-items: start; margin-top: 16px; }
  .line-chart { min-height: 210px; }
  .score-row { gap: 14px; }
  .reproduction-drawer summary small { display: none; }
  .detail-list div { grid-template-columns: 1fr; gap: 5px; }
  .next-section > p:not(.eyebrow) { font-size: 26px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { scroll-behavior: auto !important; animation-duration: .001ms !important; animation-iteration-count: 1 !important; transition-duration: .001ms !important; }
}

@media print {
  .lab-nav, .loading-screen, .stage-play, .theater-console, .hero-actions, .scroll-cue, .button { display: none !important; }
  .world-hero, .dark-section, .next-section { min-height: 0; background: white; color: black; }
  .world-stage { min-height: 500px; }
}