:root {
  --ink: #090b0c;
  --carbon: #111416;
  --graphite: #20272a;
  --line: #343c3f;
  --fog: #e9ece8;
  --paper: #f4f2ea;
  --ash: #a7b0ad;
  --cyan: #52e6d7;
  --teal: #287b78;
  --ember: #ff6b4a;
  --amber: #e8b85a;
  --serif: "Iowan Old Style", "Palatino Linotype", Georgia, serif;
  --sans: "Inter Tight", Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --mono: "IBM Plex Mono", "SFMono-Regular", Consolas, "Liberation Mono", monospace;
  --shell: min(1280px, calc(100vw - 64px));
}

*, *::before, *::after { box-sizing: border-box; }

html { scroll-behavior: smooth; overflow-x: clip; }

body {
  margin: 0;
  background: var(--ink);
  color: var(--fog);
  font-family: var(--sans);
  font-size: 17px;
  line-height: 1.5;
  text-rendering: optimizeLegibility;
  overflow-x: clip;
}

body::before {
  position: fixed;
  inset: 0;
  z-index: 20;
  pointer-events: none;
  content: "";
  opacity: .025;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 160 160' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.92' numOctaves='2' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='.85'/%3E%3C/svg%3E");
}

a { color: inherit; text-decoration-thickness: 1px; text-underline-offset: .25em; }
a:hover { color: var(--cyan); }
img { display: block; max-width: 100%; }
button, input, textarea { font: inherit; }
button, summary, a { -webkit-tap-highlight-color: transparent; }
:focus-visible { outline: 2px solid var(--cyan); outline-offset: 4px; }
.visually-hidden { position:absolute !important; width:1px !important; height:1px !important; padding:0 !important; margin:-1px !important; overflow:hidden !important; clip:rect(0,0,0,0) !important; white-space:nowrap !important; border:0 !important; }

.skip-link {
  position: fixed;
  z-index: 100;
  top: 12px;
  left: 12px;
  padding: 10px 14px;
  color: var(--ink);
  background: var(--cyan);
  transform: translateY(-160%);
}
.skip-link:focus { transform: none; }

.section-shell { width: var(--shell); margin-inline: auto; }

.site-header {
  position: relative;
  z-index: 30;
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  width: var(--shell);
  min-height: 84px;
  margin-inline: auto;
  border-bottom: 1px solid var(--graphite);
}

.wordmark { display: inline-flex; align-items: center; gap: 10px; width: max-content; text-decoration: none; }
.wordmark img { width: 30px; height: 30px; }
.wordmark > span { font-size: 17px; font-weight: 740; letter-spacing: .17em; }
.wordmark small { margin-left: 6px; color: var(--cyan); font: 9px/1 var(--mono); letter-spacing: .08em; vertical-align: super; }
.desktop-nav { display: flex; align-items: center; gap: 30px; }
.desktop-nav a { color: var(--ash); font-size: 13px; text-decoration: none; }
.desktop-nav a:hover { color: var(--fog); }
.header-cta { justify-self: end; color: var(--fog); font-size: 13px; font-weight: 620; text-decoration: none; }
.header-cta span { margin-left: 8px; color: var(--cyan); }
.mobile-menu { display: none; justify-self: end; }

.hero { position: relative; min-height: calc(100svh - 84px); padding: 96px 0 32px; isolation: isolate; }
.signal-canvas { position: absolute; z-index: -2; inset: 0; width: 100%; height: 100%; opacity: .42; pointer-events: none; }
.hero::after {
  position: absolute;
  z-index: -1;
  right: -20%;
  top: 5%;
  width: 75%;
  height: 80%;
  content: "";
  background: radial-gradient(circle, rgba(40,123,120,.13), rgba(9,11,12,0) 66%);
}
.hero-grid { display: grid; grid-template-columns: 1.05fr .95fr; gap: 60px; align-items: center; min-height: 600px; }
.hero-copy { position: relative; z-index: 1; }
.eyebrow, .section-index, .instrument-label, .package-code, .status, .principal-kicker, .principal-note, .footer-meta {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: .12em;
  text-transform: uppercase;
}
.eyebrow { display: flex; align-items: center; gap: 10px; margin: 0 0 30px; color: var(--ash); }
.live-dot { width: 7px; height: 7px; background: var(--cyan); box-shadow: 0 0 18px rgba(82,230,215,.55); }
h1, h2, h3, p { margin-top: 0; }
h1 { max-width: 800px; margin-bottom: 28px; font-size: clamp(3.35rem, 6.2vw, 6rem); line-height: .93; letter-spacing: -.055em; font-weight: 590; }
h1 em, h2 em { color: var(--cyan); font-family: var(--serif); font-weight: 400; }
.hero-lede { max-width: 600px; margin-bottom: 38px; color: var(--ash); font-size: clamp(1.08rem, 1.5vw, 1.3rem); line-height: 1.5; }
.button-row { display: flex; flex-wrap: wrap; gap: 12px; }
.button { display: inline-flex; min-height: 50px; align-items: center; justify-content: center; gap: 16px; padding: 0 20px; border: 1px solid transparent; border-radius: 2px; font-size: 14px; font-weight: 680; text-decoration: none; cursor: pointer; }
.button-primary { color: var(--ink); background: var(--fog); }
.button-primary:hover { color: var(--ink); background: var(--cyan); }
.button-secondary { color: var(--fog); border-color: var(--line); background: rgba(9,11,12,.35); }
.button-secondary:hover { color: var(--fog); border-color: var(--cyan); }
.button span { color: var(--cyan); }
.button-primary span { color: var(--teal); }

.hero-instrument { position: relative; height: 540px; margin: 0; border: 1px solid rgba(52,60,63,.7); background: var(--carbon); overflow: hidden; }
.hero-instrument::before { position: absolute; z-index: 1; inset: 0; content: ""; background: linear-gradient(90deg, rgba(9,11,12,.72), transparent 32%), linear-gradient(0deg, rgba(9,11,12,.88), transparent 24%, transparent 78%, rgba(9,11,12,.66)); pointer-events: none; }
.hero-instrument::after { position: absolute; z-index: 1; inset: 0; content: ""; opacity: .18; background-image: linear-gradient(rgba(82,230,215,.28) 1px, transparent 1px), linear-gradient(90deg, rgba(82,230,215,.18) 1px, transparent 1px); background-size: 80px 80px; mask-image: linear-gradient(90deg, transparent, black 55%); pointer-events: none; }
.hero-visual { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; object-position: 66% center; filter: saturate(.82) contrast(1.05) brightness(.88); }
.instrument-label { position: absolute; z-index: 3; left: 18px; right: 18px; display: flex; justify-content: space-between; color: var(--ash); }
.instrument-label.top { top: 16px; }
.instrument-label.bottom { bottom: 16px; }
.instrument-core { position: absolute; z-index: 2; right: 19%; top: 44%; display: grid; width: 98px; aspect-ratio: 1; place-content: center; border: 1px solid rgba(82,230,215,.82); border-radius: 50%; text-align: center; background: rgba(9,11,12,.38); box-shadow: 0 0 70px rgba(82,230,215,.12); backdrop-filter: blur(2px); }
.instrument-core span { font: 26px/.9 var(--serif); }
.instrument-core small { margin-top: 9px; color: var(--cyan); font: 8px/1 var(--mono); letter-spacing: .2em; }
.hero-foot { display: grid; grid-template-columns: repeat(4,1fr); border-top: 1px solid var(--graphite); color: var(--ash); font: 10px/1.4 var(--mono); letter-spacing: .09em; text-transform: uppercase; }
.hero-foot span { padding: 18px 14px 0 0; }

.section-index { display: flex; gap: 18px; padding-bottom: 18px; color: var(--ash); border-bottom: 1px solid var(--graphite); }
.section-index span:first-child { color: var(--cyan); }
.split-heading { display: grid; grid-template-columns: 1.25fr .75fr; gap: 120px; align-items: end; margin-top: 50px; }
.split-heading h2, .fit-section h2 { max-width: 840px; margin-bottom: 0; font-size: clamp(2.5rem, 5vw, 5rem); line-height: .98; letter-spacing: -.045em; font-weight: 560; }
.split-heading > p { max-width: 520px; margin-bottom: 6px; color: var(--ash); font-size: 18px; }
.symptoms, .system-section, .packages, .boundary, .method { padding-top: 150px; padding-bottom: 150px; }
.symptom-list { margin: 90px 0 0; padding: 0; list-style: none; }
.symptom-list li { display: grid; grid-template-columns: 80px minmax(0,1fr) 110px; gap: 30px; align-items: center; min-height: 118px; border-top: 1px solid var(--graphite); }
.symptom-list li:last-child { border-bottom: 1px solid var(--graphite); }
.list-number { color: var(--ash); font: 11px/1 var(--mono); }
.symptom-list p { max-width: 840px; margin: 0; font-size: clamp(1.25rem, 2.2vw, 2rem); line-height: 1.22; letter-spacing: -.02em; }
.list-signal { justify-self: end; width: 64px; height: 1px; background: linear-gradient(90deg, var(--teal), var(--cyan)); }

.system-section { padding-top: 40px; }
.system-map-wrap { max-width: 100%; margin-top: 80px; padding: 30px; border: 1px solid var(--graphite); background: var(--carbon); contain: layout paint; }
.system-map-wrap img { width: 100%; }
.map-summary { display: grid; grid-template-columns: repeat(3,1fr); border-right: 1px solid var(--graphite); border-bottom: 1px solid var(--graphite); border-left: 1px solid var(--graphite); }
.map-summary p { margin: 0; padding: 25px; color: var(--ash); font-size: 14px; border-right: 1px solid var(--graphite); }
.map-summary p:last-child { border-right: 0; }
.map-summary span { display: block; margin-bottom: 10px; color: var(--cyan); font: 10px/1 var(--mono); letter-spacing: .12em; }

.evidence-room, .fit-section { color: var(--ink); background: var(--paper); }
.evidence-room { padding: 150px 0; }
.section-index.dark { color: #5b6461; border-color: #c7cbc4; }
.section-index.dark span:first-child { color: #0f7770; }
.split-heading.dark h2 em, .fit-section h2 em { color: #126d68; }
.split-heading.dark > p { color: #59615e; }
.artifact-table { margin-top: 90px; border-top: 1px solid #aeb4ae; }
.artifact-row { display: grid; grid-template-columns: 1fr 1fr 1.25fr; gap: 35px; align-items: center; min-height: 100px; border-bottom: 1px solid #c7cbc4; }
.artifact-row > * { padding: 22px 0; }
.artifact-row strong { font-family: var(--serif); font-size: 23px; font-weight: 500; }
.artifact-row span { color: #4d5552; }
.artifact-row.table-head { min-height: 52px; color: #5b6461; font: 10px/1 var(--mono); letter-spacing: .1em; text-transform: uppercase; }

.package-grid { display: grid; grid-template-columns: repeat(3,1fr); gap: 1px; margin-top: 80px; background: var(--graphite); border: 1px solid var(--graphite); }
.package-card { display: flex; min-height: 480px; flex-direction: column; justify-content: space-between; padding: 32px; background: var(--ink); }
.package-card.featured { background: #0d1b1b; box-shadow: inset 0 3px var(--cyan); }
.package-code { color: var(--cyan); }
.package-card h3 { margin: 34px 0 16px; font: 400 clamp(2.4rem, 4vw, 4rem)/1 var(--serif); }
.package-card > div > p:not(.price,.term) { color: var(--ash); }
.price { margin: 0 0 5px; font-size: 36px; letter-spacing: -.03em; font-variant-numeric: tabular-nums; }
.price > span { margin-right: 10px; color: var(--ash); font: 10px/1 var(--mono); letter-spacing: .1em; }
.price small { color: var(--ash); font-size: 13px; font-weight: 400; letter-spacing: 0; }
.term { color: var(--ash); font-size: 13px; }
.package-card a { display: inline-flex; justify-content: space-between; width: 100%; margin-top: 28px; padding-top: 18px; border-top: 1px solid var(--line); font-size: 14px; text-decoration: none; }
.package-card a span { color: var(--cyan); }
.diagnostic-strip { display: grid; grid-template-columns: 1.15fr 1.2fr .75fr auto; gap: 30px; align-items: center; margin-top: 22px; padding: 30px; border: 1px solid var(--graphite); }
.diagnostic-strip h3 { margin: 8px 0 0; font: 400 29px/1.1 var(--serif); }
.diagnostic-strip > p { margin: 0; color: var(--ash); font-size: 14px; }
.diagnostic-price { color: var(--fog) !important; font-size: 20px !important; font-variant-numeric: tabular-nums; }
.diagnostic-price small { display: block; color: var(--ash); font-size: 11px; }

.boundary { padding-top: 40px; }
.boundary blockquote { max-width: 1050px; margin: 65px 0 22px; font-size: clamp(3rem, 7vw, 7rem); line-height: .9; letter-spacing: -.06em; }
.boundary-lede { max-width: 720px; color: var(--ash); font-size: 20px; }
.boundary-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 1px; margin-top: 70px; background: var(--graphite); border: 1px solid var(--graphite); }
.boundary-grid > div { padding: 34px; background: var(--ink); }
.status { display: inline-block; padding: 7px 10px; border: 1px solid currentColor; }
.status.supported { color: var(--cyan); }.status.scoped { color: var(--amber); }
.boundary-grid ul, .fit-columns ul { margin: 30px 0 0; padding: 0; list-style: none; }
.boundary-grid li, .fit-columns li { position: relative; padding: 12px 0 12px 22px; border-top: 1px solid var(--graphite); }
.boundary-grid li::before, .fit-columns li::before { position: absolute; left: 0; content: "/"; color: var(--cyan); font-family: var(--mono); }

.method { padding-top: 40px; }
.method-rail { display: grid; grid-template-columns: repeat(5,1fr); margin: 85px 0 0; padding: 0; border-top: 1px solid var(--graphite); list-style: none; }
.method-rail li { position: relative; min-height: 260px; padding: 28px 24px 20px 0; border-right: 1px solid var(--graphite); }
.method-rail li + li { padding-left: 24px; }
.method-rail li::before { position: absolute; top: -5px; left: 0; width: 9px; height: 9px; content: ""; background: var(--cyan); }
.method-rail li + li::before { left: 24px; }
.method-rail span { color: var(--ash); font: 10px/1 var(--mono); }
.method-rail strong { display: block; margin: 62px 0 12px; font: 400 25px/1.1 var(--serif); }
.method-rail p { color: var(--ash); font-size: 14px; }

.fit-section { padding: 150px 0; }
.fit-grid { display: grid; grid-template-columns: 1.15fr .85fr; gap: 110px; }
.fit-section h2 { margin-top: 55px; font-size: clamp(2.8rem, 5.5vw, 5.8rem); }
.fit-columns { display: grid; grid-template-columns: 1fr 1fr; gap: 35px; padding-top: 88px; }
.fit-columns h3 { font: 400 28px/1 var(--serif); }
.fit-columns li { color: #4d5552; border-color: #c7cbc4; font-size: 14px; }
.fit-columns div:last-child li::before { color: #a44f39; }

.principal { display: grid; grid-template-columns: .9fr 1.1fr; gap: 90px; align-items: center; padding-top: 150px; padding-bottom: 150px; }
.principal-visual { min-height: 560px; padding: 42px; border: 1px solid var(--graphite); background: linear-gradient(140deg,#142120,var(--ink) 68%); }
.principal-kicker { margin: 0 0 130px; color: var(--cyan); }
.principal-visual > strong { display: block; max-width: 480px; font: 400 clamp(2.8rem, 5vw, 5.4rem)/.95 var(--serif); letter-spacing: -.04em; }
.principal-visual dl { margin: 86px 0 0; border-top: 1px solid var(--line); }
.principal-visual dl div { display: grid; grid-template-columns: 1fr auto; gap: 24px; padding: 16px 0; border-bottom: 1px solid var(--graphite); }
.principal-visual dt { color: var(--ash); }
.principal-visual dd { margin: 0; color: var(--fog); }
.principal-copy h2 { margin: 55px 0 24px; font-size: clamp(3.2rem, 6vw, 6rem); line-height: .95; letter-spacing: -.05em; }
.principal-copy > p:not(.principal-note) { max-width: 610px; color: var(--ash); font-size: 20px; }
.principal-note { max-width: 520px; margin-top: 35px; color: var(--cyan); }

.final-cta { display: grid; grid-template-columns: 1fr .75fr; gap: 110px; align-items: start; padding: 120px 0; border-top: 1px solid var(--graphite); }
.cta-copy h2 { max-width: 720px; font-size: clamp(3.4rem, 6.5vw, 6.8rem); line-height: .92; letter-spacing: -.055em; }
.cta-copy > p:last-child { max-width: 600px; color: var(--ash); font-size: 19px; }
.concept-form, .contact-form { display: grid; gap: 10px; padding: 32px; border: 1px solid var(--graphite); background: var(--carbon); }
.concept-form label, .contact-form label { margin-top: 6px; color: var(--ash); font: 10px/1 var(--mono); letter-spacing: .1em; text-transform: uppercase; }
.concept-form input, .concept-form textarea, .contact-form input, .contact-form textarea { width: 100%; padding: 13px 0; color: var(--fog); border: 0; border-bottom: 1px solid var(--line); border-radius: 0; outline: 0; background: transparent; }
.concept-form input:focus, .concept-form textarea:focus, .contact-form input:focus, .contact-form textarea:focus { border-color: var(--cyan); box-shadow: 0 1px var(--cyan); }
.concept-form .button, .contact-form .button { width: 100%; margin-top: 18px; border: 0; }
.form-note { margin: 8px 0 0; color: var(--ash); font-size: 12px; text-align: center; }
.form-note.success { color: var(--cyan); }

.site-footer { display: grid; grid-template-columns: 1fr 1fr 1.5fr; gap: 35px; align-items: start; padding: 45px 0; border-top: 1px solid var(--graphite); }
.site-footer > p { color: var(--ash); font-size: 13px; }
.site-footer nav { display: flex; justify-content: flex-end; gap: 24px; }
.site-footer nav a { color: var(--ash); font-size: 12px; }
.site-footer .footer-meta { grid-column: 1 / -1; margin: 30px 0 0; color: #69716f; }

/* Supporting brand and concept pages */
.subpage-hero { padding: 110px 0 100px; border-bottom: 1px solid var(--graphite); }
.subpage-hero h1 { max-width: 1100px; }
.subpage-hero .hero-lede { max-width: 740px; }
.subpage-section { padding: 120px 0; }
.subpage-section + .subpage-section { border-top: 1px solid var(--graphite); }
.token-grid { display: grid; grid-template-columns: repeat(5,1fr); gap: 12px; margin-top: 60px; }
.token { min-height: 180px; padding: 18px; border: 1px solid var(--graphite); font: 10px/1.4 var(--mono); letter-spacing: .08em; }
.token b { display: block; margin-top: 100px; font-weight: 400; }
.token-ink { color: var(--fog); background:#090b0c }.token-carbon { color: var(--fog); background:#111416 }.token-paper { color: var(--ink); background:#f4f2ea }.token-cyan { color: var(--ink); background:#52e6d7 }.token-ember { color: var(--ink); background:#ff6b4a }
.type-specimen { display: grid; grid-template-columns: 1.3fr .7fr; gap: 80px; margin-top: 65px; }
.type-display { font-size: clamp(3rem,7vw,7.5rem); line-height:.88; letter-spacing:-.06em; }
.type-display em { font-family: var(--serif); color: var(--cyan); }
.type-notes { color: var(--ash); }
.motif-grid, .concept-grid { display:grid; grid-template-columns:repeat(3,1fr); gap:16px; margin-top:60px; }
.motif-card, .concept-card { min-height:320px; padding:28px; border:1px solid var(--graphite); background:var(--carbon); }
.motif-visual { position:relative; height:150px; margin-bottom:32px; border-bottom:1px solid var(--graphite); overflow:hidden; }
.motif-visual.nodes { background-image:radial-gradient(circle,#52e6d7 1px,transparent 1.5px); background-size:16px 16px; mask-image:radial-gradient(ellipse at 35% 50%,black,transparent 65%); }
.motif-visual.lines { background-image:linear-gradient(#287b78 1px,transparent 1px),linear-gradient(90deg,#287b78 1px,transparent 1px); background-size:28px 28px; transform:perspective(300px) rotateX(58deg); transform-origin:bottom; }
.motif-visual.evidence::before { position:absolute; inset:25px 0; content:"01  SOURCE / DATE  —  FINDING\A 02  VALUE / STATE —  IMPLICATION\A 03  OWNER / NEXT  —  DECISION"; color:var(--ash); white-space:pre; font:10px/2.2 var(--mono); }
.motif-card h3, .concept-card h2 { font:400 30px/1.1 var(--serif); }
.motif-card p, .concept-card p { color:var(--ash); font-size:14px; }
.concept-card { display:flex; min-height:540px; flex-direction:column; justify-content:space-between; }
.concept-card.recommended { box-shadow:inset 0 3px var(--cyan); }
.concept-art { position:relative; height:230px; margin:-10px -10px 35px; border:1px solid var(--graphite); overflow:hidden; }
.concept-art.ecology { background:radial-gradient(circle at 60% 55%,rgba(82,230,215,.32),transparent 26%),radial-gradient(circle at 60% 55%,#111416,#090b0c 65%); }
.concept-art.ecology::after { position:absolute; inset:14%; content:""; border:1px solid var(--teal); border-radius:49% 51% 45% 55%; box-shadow:0 0 0 35px rgba(40,123,120,.08),0 0 0 70px rgba(40,123,120,.04); }
.concept-art.blueprint { background-color:var(--paper); background-image:linear-gradient(rgba(40,123,120,.18) 1px,transparent 1px),linear-gradient(90deg,rgba(40,123,120,.18) 1px,transparent 1px); background-size:24px 24px; }
.concept-art.blueprint::after { position:absolute; inset:20% 27%; content:""; border:2px solid #287b78; border-radius:55% 45% 70% 30%; transform:rotate(22deg); }
.concept-art.threshold { background:linear-gradient(120deg,#0d1011 0 34%,#182325 34% 37%,#0b0d0e 37% 65%,#2a1a16 65% 68%,#0d1011 68%); }
.concept-art.threshold::after { position:absolute; inset:0; content:""; background:repeating-linear-gradient(90deg,transparent 0 36px,rgba(82,230,215,.12) 37px,transparent 38px); }
.concept-meta { margin-top:26px; padding-top:18px; border-top:1px solid var(--graphite); color:var(--ash); font:10px/1.7 var(--mono); letter-spacing:.08em; }
.decision-table { width:100%; margin-top:60px; border-collapse:collapse; }
.decision-table th,.decision-table td { padding:20px 14px; border-bottom:1px solid var(--graphite); text-align:left; vertical-align:top; }
.decision-table th { color:var(--ash); font:10px/1 var(--mono); letter-spacing:.08em; text-transform:uppercase; }
.decision-table td:first-child { font-family:var(--serif); font-size:21px; }

@media (max-width: 1040px) {
  :root { --shell: min(100% - 40px, 1280px); }
  .desktop-nav, .header-cta { display:none; }
  .site-header { grid-template-columns:1fr auto; }
  .mobile-menu { display:block; }
  .mobile-menu nav { display:none; }
  .mobile-menu summary { padding:10px; color:var(--fog); font:11px/1 var(--mono); letter-spacing:.1em; cursor:pointer; list-style:none; }
  .mobile-menu summary::-webkit-details-marker { display:none; }
  .mobile-menu[open] nav { position:absolute; top:70px; right:0; display:grid; min-width:230px; padding:18px; border:1px solid var(--graphite); background:var(--carbon); }
  .mobile-menu nav a { padding:10px; color:var(--fog); text-decoration:none; }
  .hero { padding-top:70px; }
  .hero-grid { grid-template-columns:1fr; }
  .hero-instrument { height:480px; }
  .hero-visual { object-position: 58% center; }
  .split-heading { gap:60px; }
  .diagnostic-strip { grid-template-columns:1fr 1fr; }
  .fit-grid { grid-template-columns:1fr; gap:50px; }
  .fit-columns { padding-top:0; }
  .principal { gap:45px; }
  .final-cta { gap:55px; }
  .token-grid { grid-template-columns:repeat(3,1fr); }
  .concept-grid { grid-template-columns:1fr; }
  .concept-card { min-height:auto; }
}

@media (max-width: 760px) {
  :root { --shell: calc(100% - 32px); }
  body { font-size:17px; }
  .site-header { min-height:70px; }
  .hero { min-height:auto; padding-top:72px; }
  .hero-grid { gap:55px; min-height:0; }
  h1 { font-size:clamp(3.1rem,15.5vw,4.7rem); }
  .hero-instrument { height:390px; }
  .instrument-label { font-size:8px; }
  .hero-foot { grid-template-columns:1fr 1fr; margin-top:42px; }
  .hero-foot span { padding-top:15px; }
  .symptoms,.system-section,.packages,.boundary,.method { padding-top:95px; padding-bottom:95px; }
  .split-heading { grid-template-columns:1fr; gap:28px; margin-top:36px; }
  .split-heading h2,.fit-section h2 { font-size:clamp(2.65rem,12vw,4rem); }
  .symptom-list { margin-top:55px; }
  .symptom-list li { grid-template-columns:35px 1fr; gap:15px; min-height:120px; padding:20px 0; }
  .list-signal { display:none; }
  .symptom-list p { font-size:1.3rem; }
  .system-map-wrap { margin-top:55px; padding:8px; }
  .system-map-wrap img { min-width:0; }
  .map-summary { grid-template-columns:1fr; }
  .map-summary p { border-right:0; border-bottom:1px solid var(--graphite); }
  .map-summary p:last-child { border-bottom:0; }
  .evidence-room,.fit-section { padding:95px 0; }
  .artifact-table { margin-top:55px; }
  .artifact-row { grid-template-columns:1fr; gap:4px; min-height:0; padding:22px 0; }
  .artifact-row > * { padding:2px 0; }
  .artifact-row.table-head { display:none; }
  .artifact-row span:last-child { margin-top:10px; font-size:14px; }
  .package-grid { grid-template-columns:1fr; margin-top:55px; }
  .package-card { min-height:420px; }
  .diagnostic-strip { grid-template-columns:1fr; padding:25px; }
  .boundary blockquote { margin-top:48px; font-size:clamp(3.25rem,15vw,5.5rem); }
  .boundary-grid { grid-template-columns:1fr; }
  .method-rail { grid-template-columns:1fr; margin-top:55px; border-top:0; }
  .method-rail li,.method-rail li + li { min-height:0; padding:28px 0 28px 32px; border-top:1px solid var(--graphite); border-right:0; }
  .method-rail li::before,.method-rail li + li::before { top:24px; left:0; }
  .method-rail strong { margin:12px 0 7px; }
  .fit-columns { grid-template-columns:1fr; }
  .principal { grid-template-columns:1fr; padding-top:95px; padding-bottom:95px; }
  .principal-visual { min-height:0; padding:30px; }
  .principal-kicker { margin-bottom:90px; }
  .final-cta { grid-template-columns:1fr; padding:90px 0; }
  .site-footer { grid-template-columns:1fr; }
  .site-footer nav { justify-content:flex-start; flex-wrap:wrap; }
  .site-footer .footer-meta { grid-column:auto; }
  .subpage-hero { padding:80px 0 70px; }
  .subpage-section { padding:85px 0; }
  .token-grid { grid-template-columns:1fr 1fr; }
  .type-specimen,.motif-grid { grid-template-columns:1fr; gap:30px; }
  .decision-table { display:block; overflow-x:auto; white-space:nowrap; }
}

@media (max-width: 420px) {
  .button-row { display:grid; }
  .button { width:100%; }
  .hero-instrument { height:340px; }
  .token-grid { grid-template-columns:1fr; }
}

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