:root {
  --forest: #07100e;
  --forest-soft: #0d1714;
  --forest-raised: #13201b;
  --paper: #e5ddcd;
  --paper-deep: #ded5c4;
  --ink: #171c17;
  --gold: #b9a67f;
  --gold-dark: #695132;
  --sage: #84947d;
  --terra: #a56f55;
  --muted: #aaa28f;
  --muted-dark: #565c53;
  --hair: rgba(185, 166, 127, .28);
  --display: 'Fraunces', Georgia, serif;
  --body: 'Newsreader', Georgia, serif;
  --mono: 'IBM Plex Mono', ui-monospace, monospace;
  --wrap: 1240px;
  --focus: #f2dd92;
}

*, *::before, *::after { box-sizing: border-box; }
html { color-scheme: dark; scroll-behavior: smooth; touch-action: manipulation; -webkit-text-size-adjust: 100%; -webkit-tap-highlight-color: rgba(185, 166, 127, .18); }
body { margin: 0; background: var(--forest); color: var(--paper); font: 300 18px/1.62 var(--body); -webkit-font-smoothing: antialiased; }
body.menu-open { overflow: hidden; }
img { max-width: 100%; height: auto; }
button, input { font: inherit; }
a { color: inherit; }
h1, h2, h3, h4, p, blockquote, figure, dl, dd, ol, ul { margin-top: 0; }
h1, h2, h3, h4 { text-wrap: balance; }
p { text-wrap: pretty; }
[id] { scroll-margin-top: 82px; }
.wrap { width: min(100%, var(--wrap)); margin-inline: auto; padding-inline: clamp(24px, 6vw, 88px); }
.narrow { max-width: 840px; margin-inline: auto; }
.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0, 0, 0, 0); white-space: nowrap; border: 0; }
.skip-link { position: fixed; z-index: 100; top: 12px; left: 18px; transform: translateY(-160%); background: var(--paper); color: var(--forest); padding: 12px 16px; font: 500 12px var(--mono); text-decoration: none; }
.skip-link:focus { transform: none; }
:focus-visible { outline: 3px solid var(--focus); outline-offset: 4px; }

.btn { display: inline-flex; align-items: center; justify-content: center; min-height: 48px; padding: 14px 24px; border: 1px solid var(--paper); border-radius: 0; background: var(--paper); color: var(--forest); font: 500 11px/1 var(--mono); letter-spacing: .12em; text-transform: uppercase; text-decoration: none; cursor: pointer; transition: color .2s ease, background .2s ease, transform .2s ease; white-space: nowrap; }
.btn:hover { background: transparent; color: var(--paper); }
.btn:active { transform: translateY(1px); }
.btn-small { min-height: 42px; padding: 11px 17px; font-size: 10px; }
.btn-ghost { background: transparent; color: var(--gold); border-color: var(--gold); }
.btn-ghost:hover { background: var(--gold); color: var(--forest); }
.text-link { display: inline-flex; align-items: center; min-height: 44px; color: var(--paper); font: 500 11px var(--mono); letter-spacing: .09em; text-transform: uppercase; text-underline-offset: 6px; }
.light-section .text-link { color: var(--ink); }
.eyebrow { color: var(--gold); font: 500 10px/1.6 var(--mono); letter-spacing: .17em; text-transform: uppercase; }

.sticky-bar { position: fixed; z-index: 60; inset: 0 0 auto; transform: translateY(-105%); background: rgba(7, 16, 14, .95); border-bottom: 1px solid var(--hair); backdrop-filter: blur(14px); transition: transform .3s ease; }
.sticky-bar.is-visible { transform: none; }
.sticky-inner { min-height: 62px; display: flex; align-items: center; justify-content: space-between; gap: 20px; }
.sticky-mark { font: 400 11px var(--mono); letter-spacing: .12em; text-transform: uppercase; color: var(--muted); }
.sticky-mark b { color: var(--paper); font-weight: 500; }

.hero { min-height: 820px; display: flex; align-items: center; position: relative; isolation: isolate; overflow: hidden; border-bottom: 1px solid var(--hair); }
.hero::before { content: ''; position: absolute; inset: 0; z-index: -2; background: url('assets/intero-main.webp') center/cover no-repeat; }
.hero::after { content: ''; position: absolute; inset: 0; z-index: -1; background: linear-gradient(90deg, rgba(5, 12, 10, .98), rgba(5, 12, 10, .9) 34%, rgba(5, 12, 10, .42) 63%, rgba(5, 12, 10, .08)), linear-gradient(0deg, rgba(5, 12, 10, .65), transparent 45%); }
.site-header { position: absolute; inset: 0 0 auto; border-bottom: 1px solid rgba(185, 166, 127, .24); }
.nav-row { min-height: 78px; display: flex; align-items: center; justify-content: space-between; gap: 32px; }
.identity { display: inline-flex; min-height: 44px; flex-direction: column; justify-content: center; color: var(--paper); font: 400 20px/1 var(--display); letter-spacing: .3em; text-decoration: none; white-space: nowrap; }
.identity small { margin-top: 8px; color: var(--gold); font: 500 8px/1 var(--mono); letter-spacing: .42em; }
.primary-nav { display: flex; align-items: center; gap: clamp(14px, 2.2vw, 28px); }
.primary-nav a { color: #d6cebf; font: 500 9px/1.2 var(--mono); letter-spacing: .08em; text-transform: uppercase; text-decoration: none; white-space: nowrap; }
.primary-nav a:hover { color: #fff; }
.primary-nav .nav-cta { min-height: 42px; display: inline-flex; align-items: center; padding: 10px 14px; border: 1px solid rgba(185, 166, 127, .65); color: var(--gold); }
.menu-toggle { display: none; min-height: 44px; padding: 10px 0 10px 14px; border: 0; background: transparent; color: var(--paper); font: 500 10px var(--mono); letter-spacing: .1em; text-transform: uppercase; cursor: pointer; }
.menu-icon { width: 22px; height: 12px; margin-left: 10px; border-top: 1px solid currentColor; border-bottom: 1px solid currentColor; transition: transform .2s ease; }
.menu-toggle[aria-expanded='true'] .menu-icon { transform: rotate(90deg); }
.hero-content { width: 100%; padding-top: 132px; }
.hero h1 { max-width: 14ch; margin: 24px 0 22px; color: var(--paper); font: 400 clamp(48px, 5.8vw, 76px)/1.01 var(--display); letter-spacing: -.02em; text-shadow: 0 3px 24px rgba(0, 0, 0, .3); }
.hero-sub { max-width: 49ch; margin-bottom: 30px; color: #ddd5c7; font-size: 19px; line-height: 1.52; }
.hero-actions { display: flex; align-items: center; gap: 22px; flex-wrap: wrap; }
.hero-note { margin-top: 18px; color: var(--muted); font: 400 10px/1.6 var(--mono); letter-spacing: .04em; }

.fact-strip { background: var(--forest-soft); border-bottom: 1px solid var(--hair); }
.facts { display: grid; grid-template-columns: repeat(6, minmax(0, 1fr)); padding-inline: clamp(24px, 6vw, 88px); }
.fact-item { position: relative; min-width: 0; border-right: 1px solid var(--hair); }
.fact-item:first-child { border-left: 1px solid var(--hair); }
.fact-item summary { min-height: 74px; display: grid; grid-template-columns: minmax(0, 1fr) 18px; gap: 8px; align-items: center; padding: 16px 12px; color: var(--paper); cursor: pointer; list-style: none; font: 400 10px/1.45 var(--mono); letter-spacing: .03em; }
.fact-item summary::-webkit-details-marker { display: none; }
.fact-item summary::after { content: '+'; color: var(--gold); font: 500 15px/1 var(--mono); text-align: center; transition: transform .18s ease; }
.fact-item[open] summary { background: rgba(185, 166, 127, .07); }
.fact-item[open] summary::after { content: '−'; }
.fact-detail { min-height: 174px; padding: 18px 14px 22px; border-top: 1px solid var(--hair); background: var(--forest-raised); }
.fact-detail p { margin-bottom: 14px; color: #c6beaf; font-size: 14px; line-height: 1.45; }
.fact-detail a { display: inline-flex; min-height: 44px; align-items: center; color: var(--gold); font: 500 9px/1.35 var(--mono); letter-spacing: .06em; text-transform: uppercase; text-underline-offset: 5px; }
.topic-strip, .light-section { background: var(--paper-deep); color: var(--ink); }
.topics { display: grid; grid-template-columns: repeat(5, 1fr); }
.topics article { padding: 26px 18px; border-right: 1px solid rgba(25, 29, 24, .16); }
.topics article:first-child { border-left: 1px solid rgba(25, 29, 24, .16); }
.topics h3 { margin-bottom: 8px; font: 500 17px/1.2 var(--display); }
.topics p { margin: 0; color: rgba(25, 29, 24, .72); font-size: 13px; line-height: 1.45; }

.section, .light-section { padding-block: 104px; border-top: 1px solid var(--hair); }
.section h2, .light-section h2, .lab-shell h2, .inquiry h2 { max-width: 20ch; margin-bottom: 24px; font: 400 clamp(34px, 4.4vw, 54px)/1.08 var(--display); letter-spacing: -.02em; }
.section-lede { max-width: 60ch; margin-bottom: 40px; font-size: clamp(18px, 2vw, 20px); line-height: 1.55; }
.section-tail { max-width: 58ch; margin-top: 38px; font: 400 clamp(21px, 2.8vw, 28px)/1.35 var(--display); }

.problem { position: relative; padding-block: 100px; }
.editorial-rail { position: absolute; top: 100px; right: clamp(24px, 4.5vw, 72px); writing-mode: vertical-rl; color: rgba(26, 31, 25, .68); font: 500 9px/1 var(--mono); letter-spacing: .28em; pointer-events: none; }
.problem p { margin-bottom: 24px; color: #20241f; font-size: clamp(18px, 2vw, 21px); }
.problem blockquote { max-width: 30ch; margin: 34px 0; padding-left: 22px; border-left: 2px solid var(--gold-dark); color: #17201a; font: italic 300 clamp(23px, 3vw, 30px)/1.4 var(--display); }
.problem .pull { max-width: 20ch; margin: 54px 0; font: 400 clamp(29px, 4vw, 43px)/1.18 var(--display); }
.method-line { color: var(--gold-dark); font: 500 12px/1.6 var(--mono); letter-spacing: .06em; }
.problem .method-line { margin: 42px 0 0; }
.thesis { margin-top: 36px; padding: 30px 0; border-top: 1px solid rgba(35, 42, 33, .25); border-bottom: 1px solid rgba(35, 42, 33, .25); }
.thesis p { margin: 0; font: 400 clamp(22px, 3vw, 30px)/1.35 var(--display); }

.lab-shell { padding-block: 112px; background: radial-gradient(circle at 82% 24%, rgba(92, 111, 86, .14), transparent 28rem), var(--forest-soft); border-block: 1px solid var(--hair); }
.lab-intro { max-width: 62ch; margin-bottom: 50px; padding-left: 30px; border-left: 1px solid rgba(185, 166, 127, .6); }
.lab-intro p { color: var(--muted); }
.lab-intro .no-gate { color: var(--sage); font: 500 11px var(--mono); letter-spacing: .05em; }
.lab { display: grid; grid-template-columns: minmax(0, 1fr) 250px; gap: 52px; align-items: start; }
.track { display: flex; gap: 6px; margin-bottom: 32px; }
.tick { height: 2px; flex: 1; background: var(--hair); transition: background .5s ease; }
.tick.done { background: var(--gold); }
.tick.now { background: var(--paper); }
.scene { min-height: 52vh; }
.stepno { color: var(--muted); font: 500 10px var(--mono); letter-spacing: .14em; text-transform: uppercase; }
.context { max-width: 58ch; margin: 18px 0 24px; padding-left: 14px; border-left: 1px solid var(--hair); color: var(--muted); font: 400 12px/1.65 var(--mono); }
.said2 { max-width: 27ch; margin: 20px 0 6px; font: italic 300 clamp(22px, 3vw, 30px)/1.4 var(--display); }
.stage { margin-bottom: 28px; color: var(--muted); font-size: 15px; }
.ask { margin-bottom: 16px; color: var(--gold); font: 500 11px var(--mono); letter-spacing: .12em; text-transform: uppercase; }
.opts { display: flex; max-width: 66ch; flex-direction: column; gap: 9px; }
.opt { width: 100%; display: flex; gap: 14px; align-items: flex-start; padding: 15px 17px; border: 1px solid var(--hair); border-radius: 0; background: rgba(229, 221, 205, .035); color: var(--paper); text-align: left; cursor: pointer; transition: border-color .18s ease, background .18s ease; }
.opt:hover:not(:disabled) { border-color: rgba(185, 166, 127, .75); background: rgba(185, 166, 127, .06); }
.opt:disabled { cursor: default; }
.opt .k { flex: 0 0 auto; padding-top: 3px; color: var(--muted); font: 500 11px var(--mono); }
.opt .tag { margin-left: auto; padding-top: 4px; flex: 0 0 auto; font: 500 9px var(--mono); letter-spacing: .1em; text-transform: uppercase; }
.opt.chosen { border-color: var(--paper); }
.opt.answer { border-color: var(--sage); background: rgba(132, 148, 125, .12); }
.opt.answer .k, .opt.answer .tag { color: var(--sage); }
.reveal { max-width: 66ch; margin-top: 32px; }
.block { margin-bottom: 24px; }
.block h3, .scope h3 { margin-bottom: 9px; color: var(--gold); font: 500 10px var(--mono); letter-spacing: .13em; text-transform: uppercase; }
.block p { margin-bottom: 11px; }
.response { margin: 4px 0 26px; padding: 4px 0 4px 20px; border-left: 2px solid var(--paper); }
.response .lead { margin-bottom: 10px; color: var(--muted); font: 500 10px var(--mono); letter-spacing: .12em; text-transform: uppercase; }
.response .r { margin: 0; font: italic 300 clamp(20px, 2.3vw, 24px)/1.42 var(--display); }
.rejoin { margin: 0 0 26px; padding: 15px 17px; border: 1px dashed var(--hair); color: var(--muted); font: 400 12px/1.7 var(--mono); }
.quote { padding-left: 18px; border-left: 2px solid var(--gold); font: italic 300 19px/1.5 var(--display); }
.scope { margin: 4px 0 26px; padding: 20px 22px; border: 1px solid var(--terra); background: rgba(165, 111, 85, .08); }
.scope h3 { color: #c89073; }
.scope li { margin-bottom: 7px; }
.principle { margin-top: 28px; padding-top: 18px; border-top: 1px solid var(--hair); }
.principle .l { display: block; margin-bottom: 7px; color: var(--muted); font: 500 10px var(--mono); letter-spacing: .13em; text-transform: uppercase; }
.principle p { font: 400 20px/1.45 var(--display); }
.next, .restart { min-height: 44px; margin-top: 28px; border: 1px solid var(--gold); background: transparent; color: var(--gold); padding: 12px 22px; font: 500 11px var(--mono); letter-spacing: .1em; text-transform: uppercase; cursor: pointer; }
.next:hover { background: var(--gold); color: var(--forest); }
.record { position: sticky; top: 82px; }
.record h2 { margin-bottom: 16px; padding-bottom: 12px; border-bottom: 1px solid var(--hair); color: var(--muted); font: 500 10px var(--mono); letter-spacing: .13em; text-transform: uppercase; }
.rec-empty, .rec-item { color: var(--muted); font: 400 11px/1.65 var(--mono); }
.rec-item { position: relative; margin-bottom: 15px; padding-left: 18px; }
.rec-item::before { content: ''; position: absolute; left: 0; top: 8px; width: 8px; height: 1px; background: var(--gold); }
.rec-item .n { display: block; margin-bottom: 3px; color: var(--gold); font-size: 9px; }
.rec-note { display: block; margin-top: 5px; color: var(--muted); font-size: 9px; text-transform: uppercase; }
.close { max-width: 66ch; }
.close .big { font: 400 clamp(26px, 3.3vw, 35px)/1.28 var(--display); }
.tally { margin: 24px 0; padding: 16px 18px; border: 1px solid var(--hair); color: var(--muted); font: 400 12px/1.7 var(--mono); }
.restart { border: 0; padding-inline: 0; text-decoration: underline; text-underline-offset: 5px; }
.lab-after { max-width: 62ch; margin-top: 58px; padding-top: 32px; border-top: 1px solid var(--hair); }
.lab-after .strong { font: 400 clamp(22px, 2.5vw, 27px)/1.4 var(--display); }
.lab-after p { color: var(--muted); }
.lab-after .strong { color: var(--paper); }

.institute { min-height: 720px; display: flex; align-items: flex-end; position: relative; isolation: isolate; overflow: hidden; border-block: 1px solid var(--hair); }
.institute::before { content: ''; position: absolute; inset: 0; z-index: -2; background: url('assets/intero-grounding.webp') center 55%/cover no-repeat; }
.institute::after { content: ''; position: absolute; inset: 0; z-index: -1; background: linear-gradient(90deg, rgba(4, 11, 9, .97), rgba(4, 11, 9, .65) 54%, rgba(4, 11, 9, .16)), linear-gradient(0deg, rgba(4, 11, 9, .88), transparent 66%); }
.institute-copy { width: 100%; padding-top: 92px; padding-bottom: 82px; }
.institute h2 { max-width: 14ch; margin: 18px 0 24px; font: 300 clamp(42px, 5.8vw, 69px)/1.02 var(--display); }
.institute .section-lede { max-width: 52ch; color: #ddd5c7; }
.values { max-width: 920px; display: grid; grid-template-columns: 1.1fr 1fr 1fr; gap: 1px; margin-top: 42px; background: var(--hair); }
.values article { padding: 24px; background: rgba(7, 16, 14, .82); backdrop-filter: blur(6px); }
.values h3 { margin-bottom: 8px; font: 400 21px var(--display); }
.values p { margin: 0; color: var(--muted); font-size: 14px; }

.architecture-heading { max-width: 800px; margin-inline: auto; text-align: center; }
.architecture-heading h2 { max-width: 18ch; margin-inline: auto; }
.pillars { display: grid; grid-template-columns: 1.05fr .95fr 1.1fr; margin-top: 46px; border-top: 1px solid rgba(25, 29, 24, .22); border-left: 1px solid rgba(25, 29, 24, .22); }
.pillars article { padding: 30px 26px; border-right: 1px solid rgba(25, 29, 24, .22); border-bottom: 1px solid rgba(25, 29, 24, .22); }
.pillars h3 { font: 500 23px/1.25 var(--display); }
.pillars p { margin-bottom: 0; color: var(--muted-dark); }
.progression { max-width: 980px; margin: 50px auto 0; padding-top: 34px; border-top: 1px solid rgba(25, 29, 24, .22); color: var(--gold-dark); text-align: center; font: 500 12px/2 var(--mono); letter-spacing: .04em; }
.progression span { margin-inline: 8px; }
.neuroscience-feature { display: grid; grid-template-columns: minmax(0, 1fr) minmax(360px, .82fr); gap: clamp(42px, 7vw, 88px); margin-top: 66px; padding-block: 54px; border-top: 1px solid rgba(25, 29, 24, .24); border-bottom: 1px solid rgba(25, 29, 24, .24); align-items: center; }
.neuroscience-copy h3 { max-width: 18ch; margin: 12px 0 22px; font: 400 clamp(31px, 3.6vw, 46px)/1.08 var(--display); letter-spacing: -.02em; }
.neuroscience-copy p:not(.science-label) { max-width: 61ch; margin-bottom: 17px; color: var(--muted-dark); }
.science-label { margin-bottom: 0; color: var(--gold-dark); font: 500 10px/1.4 var(--mono); letter-spacing: .12em; text-transform: uppercase; }
.prediction-map { margin: 0; padding-left: 30px; border-left: 1px solid rgba(25, 29, 24, .28); }
.prediction-map figcaption { margin-bottom: 22px; color: var(--gold-dark); font: 500 11px/1.4 var(--mono); letter-spacing: .09em; text-transform: uppercase; }
.prediction-inputs { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1px; background: rgba(25, 29, 24, .24); }
.prediction-inputs span { min-height: 104px; display: flex; align-items: flex-end; padding: 17px; background: var(--paper-deep); font: 500 14px/1.35 var(--body); }
.prediction-arrow { display: block; margin: 10px 0; color: var(--gold-dark); font: 500 18px/1 var(--mono); text-align: center; }
.prediction-map > strong { display: block; padding: 22px; border: 1px solid rgba(25, 29, 24, .28); color: var(--ink); font: 400 23px/1.25 var(--display); text-align: center; }
.prediction-map > p { margin: 20px 0 0; color: var(--muted-dark); font-size: 15px; line-height: 1.5; }

.inquiry { padding-block: 112px; background: radial-gradient(circle at 78% 32%, rgba(132, 148, 125, .12), transparent 32rem), var(--forest-soft); }
.inquiry-layout { display: grid; grid-template-columns: minmax(0, 1.05fr) minmax(340px, .95fr); gap: 86px; align-items: start; }
.inquiry .method-line { color: var(--gold); }
.inquiry h2 { margin-top: 18px; }
.inquiry-sequence { list-style: none; display: grid; grid-template-columns: repeat(3, 1fr); padding: 0; margin: 0 0 32px; border-top: 1px solid var(--hair); border-left: 1px solid var(--hair); }
.inquiry-sequence li { padding: 18px 14px; border-right: 1px solid var(--hair); border-bottom: 1px solid var(--hair); color: var(--gold); font: 500 10px var(--mono); text-transform: uppercase; text-align: center; }
.principles { list-style: none; padding: 0; margin: 0; }
.principles li { padding: 12px 0; border-bottom: 1px solid var(--hair); }

.practice-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 1px; background: var(--hair); }
.practice-grid p { min-height: 112px; margin: 0; padding: 24px 28px; background: var(--forest-soft); }

.curriculum { border-color: rgba(25, 29, 24, .18); }
.stage-grid { display: grid; grid-template-columns: 1fr 1.16fr 1fr .82fr; gap: 1px; background: rgba(25, 29, 24, .22); }
.stage { margin-bottom: 0; padding: 28px 24px; background: var(--paper); color: var(--ink); font-size: inherit; }
.stage h3 { margin-bottom: 24px; color: var(--gold-dark); font: 500 11px var(--mono); letter-spacing: .14em; text-transform: uppercase; }
.stage article { display: grid; grid-template-columns: 32px 1fr; gap: 12px; padding: 18px 0; border-top: 1px solid rgba(25, 29, 24, .2); }
.stage article > span { color: var(--gold-dark); font: 500 10px var(--mono); }
.stage h4 { margin-bottom: 5px; font: 500 19px/1.25 var(--display); }
.stage article p { margin: 0; color: var(--muted-dark); font-size: 14px; line-height: 1.45; }
.module-subtitle { display: block; margin-bottom: 7px; color: var(--ink); font-weight: 600; }
.course-time { max-width: 66ch; margin: 34px 0 0; padding-left: 18px; border-left: 2px solid var(--gold-dark); color: var(--muted-dark); }

.concept-groups { display: grid; grid-template-columns: 1fr 1fr; gap: 1px; margin-top: 36px; background: var(--hair); }
.concept-groups details { background: var(--forest-soft); }
.concept-groups summary { min-height: 76px; display: grid; grid-template-columns: 1fr 30px; gap: 18px; align-items: center; padding: 20px 22px; list-style: none; cursor: pointer; color: var(--paper); font: 500 16px/1.3 var(--display); }
.concept-groups summary::-webkit-details-marker { display: none; }
.concept-groups summary::after { content: '+'; color: var(--gold); font: 500 16px/1 var(--mono); text-align: center; }
.concept-groups details[open] summary::after { content: '−'; }
.concept-groups details p { margin: 0; padding: 0 22px 24px; color: var(--muted); font-size: 15px; line-height: 1.55; }
.boundary-note { max-width: 72ch; margin-top: 34px; padding: 22px 24px; border-left: 2px solid var(--terra); background: rgba(165, 111, 85, .08); }
.learning-layout { display: grid; grid-template-columns: minmax(0, .88fr) minmax(480px, 1.12fr); gap: 78px; }
.learning-sub { color: var(--gold-dark); font: 500 12px var(--mono); letter-spacing: .08em; text-transform: uppercase; }
.learning-layout > div:first-child > p:not(.learning-sub) { max-width: 58ch; }
.learning-facts { display: grid; grid-template-columns: repeat(2, 1fr); gap: 1px; margin: 0; background: rgba(25, 29, 24, .2); }
.learning-facts div { min-height: 128px; padding: 22px; background: var(--paper); }
.learning-facts dt { color: var(--gold-dark); font: 400 38px/1 var(--display); }
.learning-facts dd { margin-top: 10px; color: var(--muted-dark); font-size: 14px; }

.sample-layout { display: grid; grid-template-columns: minmax(300px, .76fr) minmax(340px, 1.24fr); gap: 64px; align-items: center; }
.sample-cover { width: min(100%, 520px); margin: 0; justify-self: start; overflow: hidden; border: 1px solid rgba(229, 221, 205, .22); background: var(--forest-raised); box-shadow: 0 24px 58px rgba(0, 0, 0, .24); line-height: 0; }
.sample-cover picture, .sample-cover img { display: block; width: 100%; }
.sample-cover img { height: auto; }
.sample-status { margin: 26px 0; padding: 18px; border-left: 2px solid var(--gold); color: var(--muted); font-size: 15px; }
.sample-status strong { color: var(--paper); }
.toolkit-layout { display: grid; grid-template-columns: 1fr 1fr; gap: 70px; }
.toolkit-list { display: grid; grid-template-columns: 1fr 1fr; gap: 1px; background: rgba(25, 29, 24, .2); }
.toolkit-list p { margin: 0; padding: 19px; background: var(--paper); }
.toolkit-list p:last-child { grid-column: 1 / -1; }

.audience h2 { max-width: 21ch; }
.audience-columns { display: grid; grid-template-columns: 1.1fr .9fr 1fr; gap: 1px; margin-top: 46px; background: var(--hair); }
.audience-columns div { padding: 30px; background: var(--forest-soft); }
.audience-columns h3, .award-path h3, .launch-card h3 { font: 400 25px var(--display); }
.audience-columns p { margin: 0; color: var(--muted); }

.credential-layout { display: grid; grid-template-columns: minmax(340px, .82fr) minmax(460px, 1.18fr); gap: 48px; align-items: start; }
.award-path { padding: 34px; border: 1px solid var(--hair); background: rgba(229, 221, 205, .03); }
.award-path ul { padding-left: 20px; }
.award-path li { margin-bottom: 10px; }
.award-path p { color: var(--muted); }
.certificate-preview { margin: 0; padding: 20px; border: 1px solid var(--hair); background: var(--forest-soft); }
.certificate-preview img { display: block; width: 100%; background: var(--paper); }
.certificate-preview figcaption { margin-top: 14px; color: var(--muted); font: 400 9px/1.6 var(--mono); letter-spacing: .05em; text-transform: uppercase; }
.review-status p { max-width: 66ch; color: var(--muted-dark); font-size: 19px; }

.standards-grid { display: grid; grid-template-columns: 1.1fr .9fr 1fr; gap: 1px; background: var(--hair); }
.standards-grid article { min-height: 190px; padding: 28px; background: var(--forest-soft); }
.standards-grid h3 { margin-bottom: 10px; color: var(--gold); font: 500 11px var(--mono); letter-spacing: .09em; text-transform: uppercase; }
.standards-grid p { margin: 0; color: var(--muted); font-size: 15px; }
.provider-note { max-width: 72ch; margin-top: 32px; color: var(--muted); }

.comparison-wrap { overflow-x: auto; margin-top: 38px; border: 1px solid rgba(25, 29, 24, .22); }
.comparison-wrap:focus-visible { outline-color: var(--gold-dark); }
.comparison table { min-width: 820px; width: 100%; border-collapse: collapse; }
.comparison th, .comparison td { padding: 20px; border-right: 1px solid rgba(25, 29, 24, .2); border-bottom: 1px solid rgba(25, 29, 24, .2); text-align: left; vertical-align: top; font-size: 15px; line-height: 1.5; }
.comparison thead th { color: var(--gold-dark); font: 500 10px var(--mono); letter-spacing: .08em; text-transform: uppercase; }
.comparison tbody th { width: 15%; color: var(--gold-dark); font-weight: 500; }
.comparison td:nth-child(2), .comparison th:nth-child(2) { background: rgba(117, 97, 63, .08); }

.price-section { background: radial-gradient(circle at 8% 20%, rgba(132, 148, 125, .13), transparent 30rem), var(--forest-soft); }
.price-layout { display: grid; grid-template-columns: .8fr 1.2fr; gap: 80px; align-items: start; }
.price-copy h2 { margin: 12px 0 4px; font-size: clamp(62px, 8vw, 104px); }
.price-copy ul { padding-left: 20px; margin-block: 32px; }
.price-copy li { margin-bottom: 8px; }
.planned-price { max-width: 38ch; color: var(--muted); }
.launch-card { padding: 38px; border: 1px solid var(--gold); background: rgba(7, 16, 14, .72); }
.launch-card > p { color: var(--muted); }
.form-field { margin-top: 20px; }
.form-field label { display: block; margin-bottom: 8px; font: 500 11px var(--mono); letter-spacing: .06em; text-transform: uppercase; }
.form-field input { width: 100%; min-height: 50px; border: 1px solid rgba(229, 221, 205, .5); border-radius: 0; background: var(--forest); color: var(--paper); padding: 12px 14px; }
.form-field input[aria-invalid='true'] { border-color: #e6a685; }
.field-error { min-height: 1.4em; margin: 6px 0 0; color: #f0b191; font-size: 14px; }
.consent { display: grid; grid-template-columns: 22px 1fr; gap: 12px; margin: 22px 0 4px; color: var(--muted); cursor: pointer; }
.consent input { width: 20px; height: 20px; margin: 3px 0 0; accent-color: var(--gold); }
.form-note { margin: 14px 0 0; color: var(--muted); font-size: 14px; }
.form-status { min-height: 1.5em; margin-top: 14px; }
.form-status.success { color: #b9d4af; }
.form-status.error { color: #f0b191; }
.honeypot { position: absolute; left: -10000px; width: 1px; height: 1px; overflow: hidden; }

.faq-layout { display: grid; grid-template-columns: minmax(260px, .72fr) minmax(0, 1.28fr); gap: 78px; align-items: start; }
.faq-list details { border-bottom: 1px solid rgba(25, 29, 24, .22); }
.faq-list details:first-child { border-top: 1px solid rgba(25, 29, 24, .22); }
.faq-list summary { min-height: 70px; display: grid; grid-template-columns: 1fr 40px; gap: 20px; align-items: center; list-style: none; cursor: pointer; font: 500 21px/1.3 var(--display); }
.faq-list summary::-webkit-details-marker { display: none; }
.faq-list summary::after { content: '+'; width: 38px; height: 38px; display: grid; place-items: center; border: 1px solid rgba(25, 29, 24, .25); border-radius: 50%; color: var(--gold-dark); font: 500 17px var(--mono); }
.faq-list details[open] summary::after { content: '−'; }
.faq-list details p { max-width: 68ch; padding: 0 52px 24px 0; color: var(--muted-dark); }

.final { min-height: 760px; display: flex; align-items: center; position: relative; isolation: isolate; overflow: hidden; padding-block: 110px; border-top: 1px solid var(--hair); }
.final::before { content: ''; position: absolute; inset: 0; z-index: -2; background: url('assets/intero-last3.webp') center/cover no-repeat; }
.final::after { content: ''; position: absolute; inset: 0; z-index: -1; background: linear-gradient(90deg, rgba(4, 11, 9, .98), rgba(4, 11, 9, .88) 42%, rgba(4, 11, 9, .35) 72%), linear-gradient(0deg, rgba(4, 11, 9, .72), transparent 62%); }
.final-copy { width: 100%; }
.final-title { max-width: 18ch; margin-bottom: 24px; font: 400 clamp(38px, 5vw, 61px)/1.06 var(--display); }
.final-facts { max-width: 60ch; color: var(--muted); font: 500 10px/1.8 var(--mono); letter-spacing: .08em; text-transform: uppercase; }
.final .btn + p { margin-top: 18px; color: var(--muted); }
.footer-nav { display: flex; flex-wrap: wrap; gap: 12px 22px; margin-top: 48px; padding-top: 28px; border-top: 1px solid var(--hair); }
.footer-nav a { color: var(--muted); font: 500 10px var(--mono); letter-spacing: .05em; text-transform: uppercase; text-underline-offset: 4px; }
.legal-line { max-width: 78ch; margin-top: 24px; color: var(--muted); font: 400 10px/1.6 var(--mono); }

.legal-page { min-height: 100vh; background: var(--paper-deep); color: var(--ink); }
.legal-header { padding-block: 30px; border-bottom: 1px solid rgba(25, 29, 24, .2); }
.legal-header .wrap { display: flex; align-items: center; justify-content: space-between; gap: 24px; }
.legal-header .identity { color: var(--ink); }
.legal-header .identity small { color: var(--gold-dark); }
.legal-header a:last-child { font: 500 10px var(--mono); text-transform: uppercase; }
.legal-main { max-width: 860px; padding-block: 90px; }
.legal-main h1 { font: 400 clamp(42px, 6vw, 66px)/1.05 var(--display); }
.legal-main h2 { margin-top: 48px; font: 500 28px/1.2 var(--display); }
.legal-main h3 { margin-top: 28px; font: 500 20px/1.3 var(--display); }
.legal-main p, .legal-main li { color: #3e443d; }
.legal-main .status-note { padding: 20px; border-left: 2px solid var(--gold-dark); background: rgba(117, 97, 63, .08); }
.legal-footer { padding-block: 34px; border-top: 1px solid rgba(25, 29, 24, .2); color: var(--muted-dark); }

.fade { opacity: 0; transform: translateY(7px); animation: fade-in .55s ease forwards; }
.b1 { animation-delay: .1s; } .b2 { animation-delay: .22s; } .b3 { animation-delay: .34s; } .pause { animation-delay: .72s; }
@keyframes fade-in { to { opacity: 1; transform: none; } }

@media (min-width: 761px) {
  .institute::before { transform: scaleX(-1); }
}

@media (max-width: 1050px) {
  .primary-nav { gap: 14px; }
  .primary-nav a:not(.nav-cta) { display: none; }
  .menu-toggle { display: inline-flex; align-items: center; }
  .primary-nav { position: fixed; inset: 78px 0 auto; z-index: 80; display: none; flex-direction: column; align-items: stretch; gap: 0; padding: 16px clamp(24px, 6vw, 88px) 28px; background: rgba(7, 16, 14, .985); border-bottom: 1px solid var(--hair); }
  .primary-nav.is-open { display: flex; }
  .primary-nav a, .primary-nav a:not(.nav-cta) { display: flex; min-height: 52px; align-items: center; border-bottom: 1px solid var(--hair); font-size: 11px; }
  .primary-nav .nav-cta { margin-top: 16px; justify-content: center; border: 1px solid var(--gold); }
  .facts { grid-template-columns: repeat(3, 1fr); }
  .fact-item:nth-child(n+4) { border-top: 1px solid var(--hair); }
  .topics { grid-template-columns: repeat(2, 1fr); }
  .topics article { border-bottom: 1px solid rgba(25, 29, 24, .16); }
  .stage-grid { grid-template-columns: 1fr 1fr; }
  .learning-layout, .sample-layout, .credential-layout, .price-layout { grid-template-columns: 1fr; gap: 48px; }
  .inquiry-layout { gap: 52px; }
  .neuroscience-feature { grid-template-columns: 1fr; }
  .sample-cover { justify-self: center; }
}

@media (max-width: 760px) {
  body { font-size: 17px; }
  .wrap { padding-inline: 22px; }
  .sticky-mark { display: none; }
  .sticky-inner { justify-content: flex-end; }
  .hero { min-height: 790px; align-items: flex-end; padding-bottom: 72px; }
  .hero::before { background-position: 62% center; opacity: .82; }
  .hero::after { background: linear-gradient(0deg, rgba(5, 12, 10, .99) 14%, rgba(5, 12, 10, .77) 58%, rgba(5, 12, 10, .28)); }
  .hero-content { padding-top: 126px; }
  .hero h1 { font-size: clamp(43px, 12vw, 58px); }
  .hero-sub { font-size: 17px; }
  .hero-actions { align-items: flex-start; flex-direction: column; gap: 10px; }
  .facts, .topics { grid-template-columns: 1fr; }
  .fact-item { border-left: 1px solid var(--hair); border-top: 1px solid var(--hair); }
  .fact-item summary { min-height: 62px; padding-inline: 16px; }
  .fact-detail { min-height: 0; }
  .topics article { border-left: 1px solid rgba(25, 29, 24, .16); }
  .editorial-rail { display: none; }
  .section, .light-section, .lab-shell, .inquiry { padding-block: 76px; }
  .lab { grid-template-columns: 1fr; gap: 0; }
  .record { position: static; margin-top: 44px; padding-top: 26px; border-top: 1px solid var(--hair); }
  .scene { min-height: 0; }
  .said2 { max-width: none; }
  .institute { min-height: 760px; }
  .institute::before { background-image: url('assets/intero-grounding-responsive.webp'); background-size: auto 117%; background-position: 61% center; }
  .institute h2 { font-size: 43px; }
  .values { grid-template-columns: 1fr; }
  .pillars, .inquiry-layout, .practice-grid, .stage-grid, .concept-groups, .toolkit-layout, .audience-columns, .standards-grid, .faq-layout { grid-template-columns: 1fr; }
  .progression { text-align: left; }
  .progression span { display: block; transform: rotate(90deg); width: 20px; margin: 6px 0; }
  .neuroscience-feature { margin-top: 46px; padding-block: 42px; }
  .prediction-map { padding: 28px 0 0; border-left: 0; border-top: 1px solid rgba(25, 29, 24, .28); }
  .prediction-inputs { grid-template-columns: 1fr; }
  .prediction-inputs span { min-height: 64px; align-items: center; }
  .practice-grid p { min-height: 0; }
  .learning-facts, .toolkit-list { grid-template-columns: 1fr; }
  .toolkit-list p:last-child { grid-column: auto; }
  .sample-cover { width: min(100%, 460px); }
  .certificate-preview { padding: 12px; }
  .launch-card { padding: 28px 22px; }
  .faq-list details p { padding-right: 0; }
  .final { min-height: 720px; align-items: flex-end; }
  .final::before { background-position: 80% center; }
  .final::after { background: linear-gradient(0deg, rgba(4, 11, 9, .99) 14%, rgba(4, 11, 9, .84) 60%, rgba(4, 11, 9, .3)); }
  .final-title { font-size: 42px; }
  .legal-header .wrap { align-items: flex-start; flex-direction: column; }
}

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