:root {
  color-scheme: light;
  --ink: #171714;
  --paper: #f2efe6;
  --paper-2: #e8e2d4;
  --red: #a92518;
  --red-dark: #7d170f;
  --acid: #d8ed52;
  --muted: #5b584f;
  --line: rgba(23, 23, 20, 0.17);
  --white: #fffdf7;
  --max: 1240px;
  --sans: Inter, "Segoe UI", Helvetica, Arial, sans-serif;
  --mono: "Cascadia Mono", "SFMono-Regular", Consolas, monospace;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; background: var(--paper); color: var(--ink); font-family: var(--sans); line-height: 1.55; }
a { color: inherit; }
a:focus-visible, button:focus-visible, select:focus-visible, input:focus-visible, textarea:focus-visible, summary:focus-visible { outline: 3px solid var(--acid); outline-offset: 3px; }
button, select { font: inherit; }
.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; top: .75rem; left: .75rem; z-index: 20; padding: .7rem 1rem; background: var(--acid); transform: translateY(-180%); }
.skip-link:focus { transform: translateY(0); }

.site-header { width: min(calc(100% - 2rem), var(--max)); min-height: 84px; margin: 0 auto; display: flex; align-items: center; justify-content: space-between; border-bottom: 1px solid var(--line); }
.brand { display: inline-flex; align-items: center; gap: .85rem; font-size: .83rem; font-weight: 800; letter-spacing: .02em; text-decoration: none; text-transform: uppercase; }
.brand-mark-image { width: 42px; height: 42px; flex: 0 0 auto; border-radius: 9px; }
.brand-mark { width: 31px; height: 31px; display: grid; place-items: center; position: relative; transform: rotate(-12deg); }
.brand-mark::before { content: ""; position: absolute; width: 23px; height: 11px; border-radius: 100% 25% 100% 25%; background: var(--red); transform: rotate(-23deg); }
.brand-mark i { position: absolute; width: 3px; height: 3px; border-radius: 50%; background: var(--paper); z-index: 1; }
.brand-mark i:nth-child(1) { transform: translate(-5px, 1px); }
.brand-mark i:nth-child(2) { transform: translate(0, -1px); }
.brand-mark i:nth-child(3) { transform: translate(5px, -3px); }
.site-nav { display: flex; align-items: center; gap: 2rem; font-size: .82rem; font-weight: 650; }
.site-nav a { text-decoration: none; }
.site-nav a:not(.nav-cta):hover { color: var(--red); }
.nav-cta { padding: .75rem 1rem; border: 1px solid var(--ink); }
.nav-toggle { display: none; background: transparent; border: 0; padding: .75rem; }
.nav-toggle i { display: block; width: 24px; height: 2px; margin: 5px; background: currentColor; }

.hero { width: min(calc(100% - 2rem), var(--max)); min-height: calc(100vh - 84px); margin: 0 auto; padding: clamp(4rem, 9vw, 8.5rem) 0 5rem; display: grid; grid-template-columns: minmax(0, 1.16fr) minmax(330px, .84fr); gap: clamp(2.5rem, 7vw, 7rem); align-items: center; }
.eyebrow, .section-kicker { margin: 0 0 1.25rem; color: var(--red); font-family: var(--mono); font-size: .72rem; font-weight: 700; letter-spacing: .12em; text-transform: uppercase; }
h1, h2, h3, p { margin-top: 0; }
h1 { max-width: 850px; margin-bottom: 1.5rem; font-size: clamp(3.6rem, 7.4vw, 7.4rem); line-height: .87; letter-spacing: -.075em; }
.hero-intro { max-width: 690px; margin-bottom: 2rem; color: #49473f; font-size: clamp(1.02rem, 1.45vw, 1.28rem); }
.hero-actions { display: flex; gap: 1.5rem; align-items: center; flex-wrap: wrap; }
.button { display: inline-flex; justify-content: center; align-items: center; min-height: 50px; padding: .8rem 1.15rem; border: 1px solid var(--ink); background: var(--ink); color: var(--white); font-size: .84rem; font-weight: 750; text-decoration: none; }
.button:hover { background: var(--red); border-color: var(--red); }
.text-link { font-size: .86rem; font-weight: 700; text-underline-offset: 4px; }
.hero-criteria { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1rem; margin: 3.5rem 0 0; padding-top: 1rem; border-top: 1px solid var(--line); }
.hero-criteria div { display: grid; gap: .18rem; }
.hero-criteria dt { color: var(--muted); font-family: var(--mono); font-size: .65rem; text-transform: uppercase; letter-spacing: .05em; }
.hero-criteria dd { margin: 0; font-size: .78rem; font-weight: 750; }

.hero-blueprint { position: relative; padding: 1.35rem; color: var(--white); background: var(--ink); box-shadow: 18px 18px 0 var(--red); overflow: hidden; }
.hero-blueprint::before { content: ""; position: absolute; inset: 0; opacity: .13; background-image: linear-gradient(rgba(255,255,255,.2) 1px, transparent 1px), linear-gradient(90deg, rgba(255,255,255,.2) 1px, transparent 1px); background-size: 24px 24px; }
.blueprint-head, .blueprint-foot { position: relative; display: flex; justify-content: space-between; gap: 1rem; font-family: var(--mono); font-size: .63rem; letter-spacing: .06em; text-transform: uppercase; }
.blueprint-head { padding-bottom: 1rem; border-bottom: 1px solid rgba(255,255,255,.2); color: #c4c0b5; }
.signal-list { position: relative; list-style: none; margin: 0; padding: 0; }
.signal-list li { display: grid; grid-template-columns: 110px 1fr; gap: 1rem; padding: 1.15rem 0; border-bottom: 1px solid rgba(255,255,255,.15); }
.signal-list b { color: var(--acid); font-family: var(--mono); font-size: .7rem; text-transform: uppercase; }
.signal-list span { font-size: .88rem; }
.blueprint-foot { align-items: center; justify-content: flex-start; padding-top: 1.1rem; color: #c4c0b5; line-height: 1.5; }
.pulse { width: 8px; height: 8px; flex: 0 0 auto; border-radius: 50%; background: var(--acid); box-shadow: 0 0 0 5px rgba(216,237,82,.15); }

.section { width: min(calc(100% - 2rem), var(--max)); margin: 0 auto; padding: clamp(5rem, 10vw, 9rem) 0; }
.section-heading { margin-bottom: 3rem; }
.split-heading { display: grid; grid-template-columns: 1.1fr .9fr; gap: clamp(2rem, 8vw, 8rem); align-items: end; }
h2 { margin-bottom: 0; font-size: clamp(2.25rem, 4.8vw, 4.8rem); line-height: .98; letter-spacing: -.055em; }
.split-heading > p { margin-bottom: .25rem; color: var(--muted); font-size: 1.02rem; }
.process-section { border-top: 1px solid var(--line); }
.process-rail { list-style: none; display: grid; grid-template-columns: repeat(5, 1fr); margin: 0; padding: 0; border: 1px solid var(--line); }
.process-rail li { min-height: 260px; padding: 1.25rem; border-right: 1px solid var(--line); display: flex; flex-direction: column; }
.process-rail li:last-child { border-right: 0; }
.step-no { color: var(--red); font-family: var(--mono); font-size: .69rem; }
.process-rail h3 { margin: auto 0 .6rem; font-size: 1.25rem; }
.process-rail p { margin: 0; color: var(--muted); font-size: .87rem; }

.decision-section { width: 100%; max-width: none; padding-left: max(1rem, calc((100vw - var(--max)) / 2)); padding-right: max(1rem, calc((100vw - var(--max)) / 2)); background: #ddd7c7; }
.decision-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1px; background: rgba(23,23,20,.15); border: 1px solid rgba(23,23,20,.15); }
.decision-card { min-height: 360px; padding: 1.6rem; background: var(--paper); display: flex; flex-direction: column; }
.decision-card--red { background: var(--red); color: white; }
.decision-card > span { font-family: var(--mono); font-size: .66rem; text-transform: uppercase; letter-spacing: .08em; opacity: .72; }
.decision-card h3 { max-width: 290px; margin: auto 0 .85rem; font-size: clamp(1.65rem, 2.5vw, 2.6rem); line-height: 1; letter-spacing: -.04em; }
.decision-card p { font-size: .9rem; opacity: .78; }
.decision-card--red > span, .decision-card--red p { color: var(--white); opacity: 1; }
.decision-card a { align-self: flex-start; margin-top: 1rem; font-size: .78rem; font-weight: 750; text-underline-offset: 4px; }

.brief-section { display: grid; grid-template-columns: .78fr 1.22fr; gap: clamp(3rem, 8vw, 8rem); align-items: start; }
.brief-copy { position: sticky; top: 2rem; }
.brief-copy h2 { margin-bottom: 1.5rem; }
.brief-copy > p { color: var(--muted); }
.boundary-note { padding: 1rem; border-left: 3px solid var(--red); background: var(--paper-2); font-size: .85rem; }
.brief-builder { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; }
.brief-builder label { display: grid; gap: .55rem; font-family: var(--mono); font-size: .68rem; font-weight: 700; letter-spacing: .04em; text-transform: uppercase; }
.brief-builder select { width: 100%; min-height: 56px; padding: .7rem .9rem; border: 1px solid var(--ink); border-radius: 0; background: var(--white); color: var(--ink); font-family: var(--sans); font-size: .92rem; text-transform: none; }
.brief-output { grid-column: 1 / -1; margin-top: .5rem; padding: 1.5rem; background: var(--ink); color: var(--white); }
.brief-output > span { color: var(--acid); font-family: var(--mono); font-size: .67rem; text-transform: uppercase; letter-spacing: .08em; }
.brief-output ul { margin: 1rem 0 0; padding-left: 1.25rem; }
.brief-output li { margin: .55rem 0; padding-left: .35rem; font-size: .88rem; color: #e6e0d3; }

.next-section { width: 100%; max-width: none; display: grid; grid-template-columns: 1fr .65fr auto; gap: clamp(2rem, 6vw, 6rem); align-items: end; padding-left: max(1rem, calc((100vw - var(--max)) / 2)); padding-right: max(1rem, calc((100vw - var(--max)) / 2)); background: var(--red-dark); color: var(--white); }
.next-section h2 { max-width: 760px; }
.next-section > p { margin: 0; color: #e0c7c0; }
.next-section .section-kicker { color: var(--acid); }
.button--light { background: var(--acid); border-color: var(--acid); color: var(--ink); white-space: nowrap; }
.button--light:hover { background: var(--white); border-color: var(--white); }

.site-footer { padding: 4rem max(1rem, calc((100vw - var(--max)) / 2)); display: grid; grid-template-columns: 1.4fr .8fr .6fr; gap: 4rem; background: #11110f; color: var(--white); }
.site-footer p { max-width: 520px; margin: 1rem 0 0; color: #aaa69a; font-size: .78rem; }
.site-footer > div > span { color: var(--acid); font-family: var(--mono); font-size: .65rem; letter-spacing: .08em; text-transform: uppercase; }
.brand--footer .brand-mark i { background: #11110f; }
.site-footer a { text-underline-offset: 3px; }
.site-footer p a { display: inline-flex; align-items: center; min-height: 28px; }

.guide-hero { width: min(calc(100% - 2rem), var(--max)); min-height: 560px; margin: 0 auto; padding: clamp(4rem, 8vw, 8rem) 0 5rem; display: grid; grid-template-columns: minmax(0, 1.22fr) minmax(300px, .78fr); gap: clamp(3rem, 9vw, 9rem); align-items: end; }
.guide-hero h1 { max-width: 900px; font-size: clamp(3.25rem, 6.5vw, 6.5rem); }
.breadcrumbs { display: flex; align-items: center; gap: .7rem; margin-bottom: 3rem; color: var(--muted); font-family: var(--mono); font-size: .64rem; letter-spacing: .04em; text-transform: uppercase; }
.breadcrumbs a { text-underline-offset: 4px; }
.guide-marker { position: relative; padding: 1.4rem; border: 1px solid var(--line); background: var(--paper-2); box-shadow: 12px 12px 0 var(--red); }
.guide-marker::before { content: ""; position: absolute; inset: 0; opacity: .15; pointer-events: none; background-image: linear-gradient(rgba(23,23,20,.25) 1px, transparent 1px), linear-gradient(90deg, rgba(23,23,20,.25) 1px, transparent 1px); background-size: 22px 22px; }
.guide-marker > * { position: relative; }
.guide-marker > span { display: block; margin-bottom: 4rem; color: var(--red); font-family: var(--mono); font-size: .65rem; text-transform: uppercase; }
.guide-marker strong { display: block; font-size: 1.35rem; }
.guide-marker p { color: var(--muted); font-size: .86rem; }
.guide-marker a { font-size: .75rem; font-weight: 750; text-underline-offset: 4px; }

.page-visual { width: min(calc(100% - 2rem), var(--max)); margin: 0 auto clamp(4.5rem, 8vw, 7.5rem); }
.page-visual picture { display: block; overflow: hidden; background: #26251f; box-shadow: 14px 14px 0 var(--red); }
.page-visual img { display: block; width: 100%; height: auto; }
.page-visual figcaption { display: flex; justify-content: space-between; gap: 2rem; margin: 1.25rem 0 0; padding-top: 1rem; border-top: 1px solid var(--line); color: var(--muted); font-size: .78rem; }
.page-visual figcaption > span { flex: 0 0 auto; color: var(--red-dark); font-family: var(--mono); font-size: .62rem; text-transform: uppercase; letter-spacing: .04em; }

.content-section { width: min(calc(100% - 2rem), var(--max)); margin: 0 auto; padding: clamp(4.5rem, 8vw, 7.5rem) 0; border-top: 1px solid var(--line); }
.content-section > h2 { max-width: 880px; margin-bottom: 2.5rem; }
.section-title { font-size: clamp(2rem, 3.4vw, 3.5rem); }
.content-section--paper-2 { width: 100%; max-width: none; padding-left: max(1rem, calc((100vw - var(--max)) / 2)); padding-right: max(1rem, calc((100vw - var(--max)) / 2)); background: var(--paper-2); border: 0; }
.content-section--ink { width: 100%; max-width: none; padding-left: max(1rem, calc((100vw - var(--max)) / 2)); padding-right: max(1rem, calc((100vw - var(--max)) / 2)); background: var(--ink); color: var(--white); border: 0; }
.content-section--ink .section-kicker { color: var(--acid); }
.content-section--ink p { color: #cac5b8; }
.content-section--ink .two-column > div > p { color: #cac5b8; }
.content-lead { max-width: 760px; margin: 2rem 0 0; color: var(--muted); font-size: 1rem; }
.section-tail { margin-top: 2rem; text-align: right; }
.citation { display: inline-flex; margin: .1rem; padding: .12rem .35rem; border: 1px solid currentColor; color: var(--red); font-family: var(--mono); font-size: .65rem; font-weight: 700; text-decoration: none; vertical-align: middle; }
.citation:hover { background: var(--red); color: white; }
.content-section--ink .citation { color: #ff9a86; }
.content-section--ink .citation:hover { background: #ff9a86; color: var(--ink); }

.two-column { display: grid; grid-template-columns: 1fr 1fr; gap: clamp(2.5rem, 9vw, 9rem); align-items: start; }
.two-column h2 { max-width: 650px; }
.two-column > div > p { color: var(--muted); }
.triptych, .deliverable-grid, .evidence-method { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1px; margin-top: 2.5rem; border: 1px solid var(--line); background: var(--line); }
.triptych article, .deliverable-grid article, .evidence-method article { min-height: 220px; padding: 1.4rem; background: var(--paper); }
.content-section--ink .deliverable-grid { border-color: rgba(255,255,255,.15); background: rgba(255,255,255,.15); }
.content-section--ink .deliverable-grid article { background: #1f1f1b; }
.triptych p, .deliverable-grid p, .evidence-method p { color: var(--muted); font-size: .86rem; }
.content-section--ink .deliverable-grid p { color: #aaa69a; }

.matrix-grid, .branch-grid, .hygiene-grid, .capacity-ledger { display: grid; grid-template-columns: repeat(2, 1fr); gap: 1px; background: var(--line); border: 1px solid var(--line); }
.matrix-grid article, .branch-grid article, .hygiene-grid article, .capacity-ledger article { min-height: 250px; padding: 1.5rem; background: var(--paper); }
.matrix-grid article > span, .capacity-ledger article > span { color: var(--red); font-family: var(--mono); font-size: .65rem; letter-spacing: .07em; text-transform: uppercase; }
.matrix-grid h3, .branch-grid h3, .hygiene-grid h3, .capacity-ledger h3 { max-width: 390px; margin-top: 4rem; font-size: 1.55rem; line-height: 1.05; }
.matrix-grid p, .branch-grid p, .hygiene-grid p, .capacity-ledger p { color: var(--muted); font-size: .88rem; }

.comparison-table { overflow-x: auto; border: 1px solid rgba(255,255,255,.18); }
.comparison-table table { width: 100%; min-width: 760px; border-collapse: collapse; text-align: left; }
.comparison-table th, .comparison-table td { padding: 1.15rem; border-bottom: 1px solid rgba(255,255,255,.15); vertical-align: top; }
.content-section:not(.content-section--ink) .comparison-table { border-color: var(--line); }
.content-section:not(.content-section--ink) .comparison-table th, .content-section:not(.content-section--ink) .comparison-table td { border-color: var(--line); }
.comparison-table thead th { color: var(--acid); font-family: var(--mono); font-size: .66rem; letter-spacing: .05em; text-transform: uppercase; }
.content-section:not(.content-section--ink) .comparison-table thead th { color: var(--red); }
.comparison-table tbody th { width: 22%; font-size: .86rem; }
.comparison-table td { color: #c8c2b5; font-size: .82rem; }
.content-section:not(.content-section--ink) .comparison-table td { color: var(--muted); }

.action-band { width: 100%; max-width: none; display: grid; grid-template-columns: 1fr auto; gap: 3rem; align-items: end; padding-left: max(1rem, calc((100vw - var(--max)) / 2)); padding-right: max(1rem, calc((100vw - var(--max)) / 2)); background: var(--red-dark); color: white; border: 0; }
.action-band > div > span { color: var(--acid); font-family: var(--mono); font-size: .68rem; letter-spacing: .08em; text-transform: uppercase; }
.action-band h2 { max-width: 920px; margin-top: 1rem; }

.formula-card { margin: 2rem 0; padding: 2rem; border-left: 6px solid var(--red); background: var(--white); }
.formula-card > span { color: var(--red); font-family: var(--mono); font-size: .68rem; letter-spacing: .08em; text-transform: uppercase; }
.formula-card p { max-width: 970px; margin: 1rem 0; font-size: clamp(1.25rem, 2.4vw, 2.25rem); font-weight: 800; letter-spacing: -.03em; }
.content-section--ink .formula-card p { color: var(--ink); }
.formula-card small { color: var(--muted); }
.capacity-calculator { display: grid; grid-template-columns: .9fr 1.1fr; gap: clamp(2rem, 7vw, 6rem); align-items: start; }
.capacity-calculator form { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; }
.capacity-calculator label { display: grid; gap: .45rem; color: var(--muted); font-size: .75rem; font-weight: 700; }
.capacity-calculator input { width: 100%; min-height: 52px; padding: .75rem; border: 1px solid var(--ink); border-radius: 0; background: var(--white); color: var(--ink); font: inherit; }
.capacity-calculator .calculator-actions { grid-column: 1 / -1; display: flex; gap: 1rem; align-items: center; flex-wrap: wrap; }
.capacity-calculator .calculator-actions .text-link { padding: .7rem; border: 0; background: transparent; color: var(--ink); cursor: pointer; }
.capacity-calculator .calculator-actions p { margin: 0; color: var(--muted); font-size: .72rem; }
.capacity-results { min-height: 100%; padding: 1.5rem; background: var(--ink); color: var(--white); }
.capacity-results > span { color: var(--acid); font-family: var(--mono); font-size: .66rem; letter-spacing: .07em; text-transform: uppercase; }
.capacity-results dl { display: grid; gap: 0; margin: 1.2rem 0 0; }
.capacity-results dl > div { display: grid; grid-template-columns: 1fr auto; gap: 1rem; padding: 1rem 0; border-top: 1px solid rgba(255,255,255,.16); }
.capacity-results dt { color: #c7c2b6; font-size: .78rem; }
.capacity-results dd { margin: 0; color: var(--acid); font-family: var(--mono); font-size: .82rem; text-align: right; }
.capacity-results p { color: #c7c2b6; font-size: .75rem; }
.numbered-list { margin-top: 2.5rem; border-top: 1px solid rgba(255,255,255,.2); }
.numbered-list > div { display: grid; grid-template-columns: 75px 1fr; gap: 1rem; padding: 1.2rem 0; border-bottom: 1px solid rgba(255,255,255,.2); }
.numbered-list span { color: var(--acid); font-family: var(--mono); font-size: .7rem; }
.numbered-list p { margin: 0; }
.numbered-list--dark { color: var(--ink); border-color: var(--line); }
.numbered-list--dark > div { border-color: var(--line); }
.numbered-list--dark span { color: var(--red); }
.numbered-list--dark p { color: var(--ink); }

.process-map { display: grid; grid-template-columns: repeat(11, auto); align-items: stretch; gap: .45rem; overflow-x: auto; padding-bottom: 1rem; }
.process-map > div { min-width: 175px; min-height: 250px; padding: 1.15rem; border: 1px solid var(--line); display: flex; flex-direction: column; }
.process-map > i { align-self: center; color: var(--red); font-style: normal; }
.process-map span { color: var(--red); font-family: var(--mono); font-size: .65rem; }
.process-map h3 { margin: auto 0 .7rem; font-size: 1.1rem; }
.process-map p { margin: 0; color: var(--muted); font-size: .79rem; }
.checklist-section { display: grid; grid-template-columns: .8fr 1.2fr; gap: clamp(3rem, 9vw, 9rem); }
.check-list { list-style: none; margin: 0; padding: 0; border-top: 1px solid var(--line); }
.check-list li { position: relative; padding: 1rem 1rem 1rem 2rem; border-bottom: 1px solid var(--line); }
.check-list li::before { content: ""; position: absolute; left: .2rem; top: 1.45rem; width: 7px; height: 7px; border-radius: 50%; background: var(--red); }

.material-stack article { display: grid; grid-template-columns: 90px 1fr; gap: 2rem; padding: 2rem 0; border-top: 1px solid var(--line); }
.material-stack article > span { color: var(--red); font-family: var(--mono); font-size: .68rem; }
.material-stack h2 { max-width: 700px; margin-bottom: .75rem; font-size: clamp(1.8rem, 3.5vw, 3.3rem); }
.material-stack p { max-width: 840px; margin: 0; color: var(--muted); }
.plain-steps { margin: 0; padding-left: 1.2rem; }
.plain-steps li { margin-bottom: 1rem; padding-left: .4rem; }
.source-note { display: grid; grid-template-columns: 1fr 1fr; gap: 4rem; padding: 2.5rem; border: 1px solid var(--red); background: rgba(213,52,32,.06); }
.source-note h2 { font-size: clamp(1.8rem, 3.2vw, 3rem); }
.source-note p { color: var(--muted); }

.interface-board, .scorecard { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1px; background: var(--line); border: 1px solid var(--line); }
.interface-board > div, .scorecard > div { min-height: 230px; padding: 1.35rem; background: var(--paper); }
.interface-board span, .scorecard span { color: var(--red); font-family: var(--mono); font-size: .66rem; text-transform: uppercase; }
.interface-board p, .scorecard p { margin-top: 4rem; color: var(--muted); font-size: .84rem; }
.tag-list { display: flex; flex-wrap: wrap; gap: .65rem; }
.tag-list span { padding: .75rem 1rem; border: 1px solid currentColor; font-family: var(--mono); font-size: .72rem; }
.timeline { list-style: none; margin: 0; padding: 0; }
.timeline li { display: grid; grid-template-columns: 100px 1fr; gap: 2rem; padding: 2rem 0; border-top: 1px solid var(--line); }
.timeline li > span { color: var(--red); font-family: var(--mono); font-size: .72rem; }
.timeline h2 { margin-bottom: .7rem; font-size: clamp(1.8rem, 3vw, 3rem); }
.timeline p { max-width: 880px; color: var(--muted); }

.diagnostic-grid, .red-flag-list { display: grid; grid-template-columns: repeat(2, 1fr); gap: 1px; border: 1px solid var(--line); background: var(--line); }
.diagnostic-grid article, .red-flag-list article { min-height: 320px; padding: 1.5rem; background: var(--paper); }
.diagnostic-grid > article > span { color: var(--red); font-family: var(--mono); font-size: .65rem; text-transform: uppercase; }
.diagnostic-grid h3, .red-flag-list h3 { margin-top: 3rem; font-size: 1.45rem; }
.diagnostic-grid p, .red-flag-list p { color: var(--muted); font-size: .86rem; }
.diagnostic-grid b { font-size: .75rem; }

.faq-list details { border-top: 1px solid var(--line); }
.faq-list details:last-child { border-bottom: 1px solid var(--line); }
.faq-list summary { list-style: none; display: grid; grid-template-columns: 70px 1fr auto; gap: 1rem; padding: 1.5rem 0; cursor: pointer; font-size: clamp(1rem, 1.8vw, 1.35rem); font-weight: 750; }
.faq-list summary::-webkit-details-marker { display: none; }
.faq-list summary::after { content: "+"; color: var(--red); }
.faq-list details[open] summary::after { content: "−"; }
.faq-list summary span { color: var(--red); font-family: var(--mono); font-size: .68rem; }
.faq-list details > div { max-width: 850px; padding: 0 0 1.5rem 70px; color: var(--muted); }
.evidence-method article > span, .source-register article > span { color: var(--red); font-family: var(--mono); font-size: .65rem; text-transform: uppercase; }
.source-register { display: grid; grid-template-columns: 1fr 1fr; gap: 1px; background: var(--line); border: 1px solid var(--line); }
.source-register article { min-height: 310px; padding: 1.5rem; background: var(--paper); scroll-margin-top: 2rem; }
.source-register h2 { margin-top: 3rem; font-size: 1.45rem; }
.source-register p { color: var(--muted); font-size: .85rem; }
.source-register a { font-size: .75rem; font-weight: 750; text-underline-offset: 4px; }

.evidence-callout { width: min(calc(100% - 2rem), var(--max)); margin: 0 auto clamp(4rem, 8vw, 7rem); padding: 1.5rem; display: grid; grid-template-columns: 180px 1fr; gap: 2rem; border: 1px solid var(--line); }
.evidence-callout > span { color: var(--red); font-family: var(--mono); font-size: .68rem; text-transform: uppercase; }
.evidence-callout p { max-width: 900px; margin: 0; color: var(--muted); font-size: .86rem; }

.related-guides { width: min(calc(100% - 2rem), var(--max)); margin: 0 auto; padding: clamp(4rem, 7vw, 6rem) 0; display: grid; grid-template-columns: .72fr 1.28fr; gap: clamp(2rem, 8vw, 8rem); border-top: 1px solid var(--line); }
.related-guides h2 { max-width: 520px; font-size: clamp(2rem, 3.6vw, 3.6rem); }
.related-guides nav { display: grid; border-top: 1px solid var(--line); }
.related-guides nav a { display: flex; justify-content: space-between; gap: 1rem; padding: 1.15rem .2rem; border-bottom: 1px solid var(--line); font-size: .88rem; font-weight: 700; text-decoration-thickness: 1px; text-underline-offset: 4px; }
.related-guides nav a:hover { color: var(--red); }

.rfq-layout { display: grid; grid-template-columns: .66fr 1.34fr; gap: clamp(3rem, 8vw, 8rem); align-items: start; }
.rfq-intro { position: sticky; top: 2rem; }
.rfq-intro h2 { margin-bottom: 1.25rem; }
.rfq-intro > p { color: var(--muted); }
.mini-checks { list-style: none; margin: 2rem 0 0; padding: 0; border-top: 1px solid var(--line); }
.mini-checks li { padding: .8rem 0; border-bottom: 1px solid var(--line); font-size: .82rem; }
.rfq-form { position: relative; }
.rfq-form fieldset { margin: 0 0 2rem; padding: 0; border: 0; }
.rfq-form legend { width: 100%; margin-bottom: 1rem; padding-bottom: .7rem; border-bottom: 1px solid var(--line); color: var(--red); font-family: var(--mono); font-size: .68rem; font-weight: 700; letter-spacing: .07em; text-transform: uppercase; }
.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; }
.rfq-form label { display: grid; gap: .45rem; margin-bottom: 1rem; font-size: .75rem; font-weight: 750; }
.rfq-form label > span { color: var(--muted); font-size: .66rem; font-weight: 500; }
.rfq-form input, .rfq-form textarea, .rfq-form select { width: 100%; padding: .8rem; border: 1px solid var(--ink); border-radius: 0; background: var(--white); color: var(--ink); font: inherit; font-weight: 400; }
.rfq-form input:focus, .rfq-form textarea:focus, .rfq-form select:focus { outline: 3px solid var(--acid); outline-offset: 1px; }
.rfq-form [disabled] { cursor: not-allowed; opacity: .62; }
.honeypot { position: absolute; left: -10000px; width: 1px; height: 1px; overflow: hidden; }
.consent-row { grid-template-columns: auto 1fr; align-items: start; padding: 1rem; background: var(--paper-2); }
.consent-row input { width: 18px; height: 18px; margin-top: .1rem; }
.form-boundary { display: flex; gap: .8rem; align-items: center; margin: 1rem 0; padding: 1rem; border: 1px solid var(--red); }
.form-boundary p { margin: 0; color: var(--muted); font-size: .78rem; }
.form-status { min-height: 2rem; margin-top: 1rem; font-size: .82rem; }
.form-status[data-kind="error"] { color: var(--red-dark); }
.form-status[data-kind="success"] { color: #35620f; }
.turnstile-mount { min-height: 70px; margin: 1rem 0; }

@media (max-width: 960px) {
  .hero { min-height: auto; grid-template-columns: 1fr; }
  .hero-blueprint { max-width: 680px; }
  .process-rail { grid-template-columns: 1fr 1fr; }
  .process-rail li { min-height: 220px; border-bottom: 1px solid var(--line); }
  .decision-grid { grid-template-columns: 1fr; }
  .decision-card { min-height: 310px; }
  .brief-section { grid-template-columns: 1fr; }
  .brief-copy { position: static; }
  .next-section, .site-footer { grid-template-columns: 1fr; }
  .guide-hero, .rfq-layout, .capacity-calculator, .related-guides { grid-template-columns: 1fr; }
  .guide-marker { max-width: 680px; }
  .two-column, .checklist-section, .source-note { grid-template-columns: 1fr; }
  .triptych, .deliverable-grid, .evidence-method, .interface-board, .scorecard { grid-template-columns: 1fr 1fr; }
  .rfq-intro { position: static; }
}

@media (max-width: 720px) {
  .site-header { min-height: 70px; }
  .brand { max-width: 230px; font-size: .7rem; }
  .nav-toggle { display: block; }
  .site-nav { display: none; position: absolute; z-index: 10; top: 70px; left: 1rem; right: 1rem; padding: 1.2rem; background: var(--ink); color: white; flex-direction: column; align-items: stretch; }
  .site-nav.is-open { display: flex; }
  .nav-cta { border-color: rgba(255,255,255,.5); }
  .hero { padding-top: 4rem; }
  h1 { font-size: clamp(3.2rem, 17vw, 5rem); }
  .hero-criteria { grid-template-columns: 1fr; }
  .signal-list li { grid-template-columns: 1fr; gap: .4rem; }
  .split-heading { grid-template-columns: 1fr; }
  .process-rail { grid-template-columns: 1fr; }
  .process-rail li { min-height: 185px; border-right: 0; }
  .brief-builder { grid-template-columns: 1fr; }
  .brief-output { grid-column: 1; }
  .guide-hero { min-height: auto; padding-top: 3rem; }
  .guide-hero h1 { font-size: clamp(3rem, 15vw, 4.5rem); }
  .page-visual picture { box-shadow: 8px 8px 0 var(--red); }
  .page-visual figcaption { display: grid; gap: .65rem; }
  .capacity-calculator form { grid-template-columns: 1fr; }
  .capacity-calculator .calculator-actions { grid-column: 1; }
  .breadcrumbs { margin-bottom: 2rem; }
  .matrix-grid, .branch-grid, .hygiene-grid, .capacity-ledger, .diagnostic-grid, .red-flag-list, .source-register, .triptych, .deliverable-grid, .evidence-method, .interface-board, .scorecard { grid-template-columns: 1fr; }
  .action-band { grid-template-columns: 1fr; }
  .material-stack article, .timeline li { grid-template-columns: 50px 1fr; gap: 1rem; }
  .evidence-callout { grid-template-columns: 1fr; }
  .form-grid { grid-template-columns: 1fr; }
  .faq-list summary { grid-template-columns: 45px 1fr auto; }
  .faq-list details > div { padding-left: 45px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
}