:root{--white:#fff;--ease:cubic-bezier(.32,.72,0,1);--error:#9f1d1d;--radius:4px;--gutter:32px;--gutter:20px}
a{color:var(--accent);text-decoration:none}
a:hover{text-decoration:underline}
a:focus-visible,button:focus-visible{outline:2px solid var(--accent);outline-offset:3px}
.wrap{max-width:1180px;margin:0 auto;padding:0 32px}
h1,h2,h3,p{text-wrap:pretty}
h1,h2,h3{text-wrap:balance}
h1,h2,h3{font-family:var(--sans);font-weight:500;letter-spacing:-.035em}
h2{font-size:36px;line-height:40px}
h3{font-size:24px;line-height:32px}
p{color:var(--ink-soft)}
img{max-width:100%}
button,input,select,textarea{font:inherit}
button,a,input,select,textarea,summary{touch-action:manipulation}
:focus-visible{outline:2px solid var(--accent);outline-offset:4px}
[hidden]{display:none !important}
.nowrap{white-space:nowrap}
.accent-text{color:var(--accent)}
.mono,.eyebrow,.section-number,.micro{font-family:var(--mono)}
.mono,.section-number,.eyebrow{font-size:12px;line-height:16px;letter-spacing:.04em}
.eyebrow,.section-number{color:var(--accent);margin-bottom:24px}
.micro{font-size:12px;line-height:20px}
.sprint-section{padding:96px 0;border-bottom:1px solid var(--rule)}
.two-column{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1.2fr);gap:80px}
.two-column>div>p:not(.section-number){margin-top:24px;max-width:46ch}
.section-heading{display:flex;justify-content:space-between;align-items:end;gap:64px;margin-bottom:48px}
.section-heading>p{max-width:48ch;font-size:16px;line-height:24px}
.sprint-button{display:inline-flex;align-items:center;justify-content:space-between;gap:24px;min-height:48px;padding:12px 24px;border:1px solid var(--accent);background:var(--accent);color:var(--white);border-radius:2px;font-size:16px;font-weight:600;line-height:24px;cursor:pointer;white-space:nowrap;transition:background-color 180ms var(--ease),transform 150ms var(--ease)}
.sprint-button span{font-size:20px}
.sprint-button:active{transform:translateY(1px)}
.sprint-button:disabled{opacity:.6;cursor:not-allowed}
.sprint-button:focus-visible{outline-offset:4px}
.text-link{display:inline-flex;gap:16px;align-items:center;font-size:14px;font-weight:600;min-height:44px}
.text-link span{font-size:20px}
.hero-layout{display:grid;grid-template-columns:minmax(0,1.25fr) minmax(0,1fr);gap:64px;align-items:center;padding-bottom:80px}
.hero-copy h1{font-size:48px;line-height:1;max-width:680px;letter-spacing:-.045em}
.hero-lede{font-size:18px;line-height:28px;margin-top:32px;max-width:51ch}
.offer-line{font-family:var(--sans);font-size:18px;line-height:28px;color:var(--ink);margin:24px 0}
.hero-copy .micro{margin-top:12px}
.brief-stage{margin:0;background:var(--accent);padding:32px 24px 24px;border-radius:2px;position:relative}
.brief-sheet{position:relative;padding:24px;background:var(--bg);transform:rotate(-2deg);border:1px solid var(--rule);border-radius:2px}
.sheet-top{display:flex;align-items:center;justify-content:space-between;margin-bottom:32px}
.sheet-top img{height:auto;width:48px}
.sheet-top span,.sheet-label,.sheet-foot,.brief-conclusion>span,.preview-top,.preview-bottom{font-family:var(--mono);font-size:10px;line-height:16px;letter-spacing:.04em}
.sheet-label{margin-bottom:8px}
.brief-sheet h2{font-size:24px;line-height:32px;letter-spacing:-.035em}
.brief-ledger{margin-top:24px}
.brief-ledger>div{display:flex;align-items:center;gap:12px;padding:16px 0;border-top:1px solid var(--rule)}
.brief-ledger>div>span:first-child{font-family:var(--mono);color:var(--accent);font-size:12px}
.brief-ledger p{flex:1}
.brief-ledger strong{font-family:var(--sans);font-size:14px;color:var(--ink);font-weight:500;display:block}
.brief-ledger small{font-size:12px;line-height:16px;display:block;margin-top:4px}
.ledger-mark{color:var(--accent)}
.brief-conclusion{padding:16px;background:var(--accent-soft);border:1px solid var(--rule);margin-top:8px;border-radius:2px}
.brief-conclusion>span{color:var(--accent)}
.brief-conclusion p{font-family:var(--sans);font-size:24px;line-height:32px;margin-top:8px;color:var(--accent);letter-spacing:-.03em}
.sheet-foot{display:flex;justify-content:space-between;gap:8px;margin-top:24px;color:var(--ink-soft)}
.brief-stage figcaption{font-family:var(--mono);font-size:10px;line-height:16px;color:var(--white);margin-top:24px;padding:0 4px}
.availability{display:flex;align-items:center;gap:24px;padding-top:24px;padding-bottom:24px;position:relative}
.availability::before{content:'';position:absolute;top:0;left:32px;right:32px;border-top:1px solid var(--rule)}
.availability-label{font-family:var(--mono);font-size:12px;color:var(--accent)}
.availability p{font-size:14px;flex:1}
.availability a{font-size:14px;min-height:44px;display:flex;align-items:center;gap:16px}
.decision-list{align-self:center}
.decision-list a{display:flex;align-items:center;justify-content:space-between;gap:24px;padding:24px 0;color:var(--ink);font-family:var(--sans);font-size:20px;line-height:28px;border-bottom:1px solid var(--rule);transition:color 180ms var(--ease)}
.decision-list a:first-child{border-top:1px solid var(--rule)}
.decision-list a>span:last-child{color:var(--accent)}
.scope-section{background:var(--bg-raised)}
.deliverables{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:32px}
.deliverables article{border-top:1px solid var(--rule-strong);padding-top:24px}
.deliverable-no{font-family:var(--mono);font-size:14px;color:var(--accent)}
.deliverables h3{font-size:20px;line-height:28px;margin-top:32px;margin-bottom:16px}
.deliverables p{font-size:14px;line-height:24px}
.walkthrough-note{margin-top:48px;display:flex;align-items:baseline;gap:32px;padding:24px;border:1px solid var(--rule-strong);border-radius:2px}
.walkthrough-note .mono{color:var(--accent)}
.walkthrough-note p{font-size:14px;line-height:24px}
.statement-section{background:var(--accent);color:var(--white);padding:96px 0;--hero-header-bg:var(--accent)}
.statement-section .section-number{color:var(--white)}
.statement-section h2{font-size:48px;line-height:1;max-width:680px}
.statement-section p:last-child{color:var(--white);max-width:55ch;margin-top:32px;font-size:18px;line-height:28px}
.work-feature{display:grid;grid-template-columns:minmax(0,1.35fr) minmax(0,1fr);gap:48px;align-items:center}
.work-preview{background:var(--accent-soft);padding:32px;border:1px solid var(--rule-strong);border-radius:2px}
.preview-top,.preview-bottom{display:flex;justify-content:space-between;gap:16px;color:var(--accent)}
.model-flow{display:flex;align-items:center;justify-content:space-between;gap:8px;font-family:var(--mono);font-size:12px;margin-top:40px;padding:16px 0;border-bottom:1px solid var(--rule-strong);border-top:1px solid var(--rule-strong)}
.model-flow b{font-weight:400;color:var(--accent)}
.model-equation{margin:40px auto 32px;width:max-content;max-width:100%;display:flex;flex-direction:column;align-items:center;gap:12px;color:var(--accent);font-family:var(--sans);font-size:18px;line-height:28px}
.division-line{width:100%;height:1px;background:var(--accent)}
.model-equation b{font-size:20px;font-weight:500;margin-top:12px;text-align:center}
.model-insight{max-width:34ch;font-size:14px;line-height:24px;color:var(--ink-soft);margin:0 auto 40px;text-align:center}
.work-description .mono{color:var(--accent)}
.work-description h3{font-size:30px;line-height:36px;margin:16px 0 24px}
.work-description p{font-size:16px;line-height:28px}
.work-takeaway{border-top:1px solid var(--rule);padding-top:24px;margin-top:24px}
.proof-pair{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:48px;margin-top:48px}
.work-card h3{margin:24px 0 16px}
.work-card>p{max-width:54ch;font-size:16px;line-height:28px}
.compact-preview{padding:32px;background:var(--bg-raised);border:1px solid var(--rule);border-radius:2px;min-height:256px}
.compact-preview>.mono{display:block;color:var(--accent);margin-bottom:24px}
.ceiling-row{display:flex;justify-content:space-between;align-items:baseline;gap:16px;padding:16px 0;border-top:1px solid var(--rule)}
.ceiling-row span{font-family:var(--mono);font-size:12px}
.ceiling-row strong{font-family:var(--sans);font-size:16px;font-weight:500}
.research-preview{background:var(--accent);border-color:var(--accent)}
.research-preview>.mono,.research-preview p{color:var(--white)}
.research-preview p{font-family:var(--sans);font-size:30px;line-height:36px;letter-spacing:-.03em}
.sample-label{display:block;font-family:var(--mono);font-size:12px;line-height:20px;color:var(--ink-soft);margin-top:24px}
.work-card .text-link{margin-top:16px}
.research-note{margin-top:40px;font-size:14px;line-height:24px;max-width:85ch}
.process-section{background:var(--bg-raised)}
.process-list{list-style:none}
.process-list li{display:flex;gap:24px;padding:32px 0;border-bottom:1px solid var(--rule)}
.process-list li:first-child{padding-top:0}
.process-list li:last-child{border-bottom:0;padding-bottom:0}
.process-no{display:grid;place-items:center;flex:none;height:40px;width:40px;border:1px solid var(--rule-strong);border-radius:50%;font-family:var(--mono);font-size:12px;color:var(--accent)}
.process-list .mono{color:var(--accent)}
.process-list h3{font-size:20px;line-height:28px;margin:8px 0 12px}
.process-list p{font-size:16px;line-height:24px}
.investment-layout{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,.9fr);gap:96px;align-items:center}
.investment-layout>div>p:not(.section-number){margin-top:24px;line-height:28px}
.guarantee{margin-top:40px;padding:24px;background:var(--accent-soft);border:1px solid var(--rule);border-radius:2px}
.guarantee .mono{color:var(--accent)}
.guarantee h3{font-size:20px;line-height:28px;margin:16px 0}
.guarantee p{font-size:14px;line-height:24px}
.investment-card{padding:40px;border:1px solid var(--rule-strong);border-radius:2px;background:var(--white)}
.investment-card>.mono{color:var(--accent)}
.investment-card .price{font-family:var(--sans);color:var(--ink);font-size:60px;line-height:1;letter-spacing:-.045em;margin-top:32px}
.investment-card .price-scope{margin-top:12px}
.investment-card ul{list-style:none;margin:32px 0}
.investment-card li{padding:8px 0;font-size:14px;display:flex;gap:12px}
.investment-card li::before{content:'✓';color:var(--accent)}
.payment-split{display:grid;grid-template-columns:1fr 1fr;gap:24px;border-top:1px solid var(--rule);padding-top:24px;margin-bottom:32px}
.payment-split strong{display:block;font-family:var(--sans);font-weight:500;font-size:24px;line-height:32px}
.payment-split span{display:block;font-size:12px;line-height:20px;color:var(--ink-soft);margin-top:4px}
.investment-card .sprint-button{width:100%}
.investment-card .micro{margin-top:16px;text-align:center;line-height:20px}
.faq-list details{border-bottom:1px solid var(--rule);padding:24px 0}
.faq-list details:first-child{padding-top:0}
.faq-list summary{list-style:none;display:flex;gap:24px;justify-content:space-between;align-items:baseline;cursor:pointer;font-family:var(--sans);font-size:18px;line-height:28px}
.faq-list summary::-webkit-details-marker{display:none}
.faq-list summary>span{font-size:24px;color:var(--accent);transition:transform 180ms var(--ease)}
.faq-list details[open] summary>span{transform:rotate(45deg)}
.faq-list details>p{margin-top:16px;font-size:14px;line-height:24px;max-width:65ch}
.inquiry-section{background:var(--accent-soft)}
.inquiry-layout{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1.15fr);gap:80px;align-items:start}
.inquiry-copy>p:not(.section-number){margin-top:24px;max-width:44ch}
.inquiry-copy .inquiry-price{font-family:var(--sans);font-size:30px;line-height:40px;color:var(--accent);letter-spacing:-.03em;margin-top:40px}
.inquiry-price strong{font-weight:500}
.form-panel{padding:32px;background:var(--bg);border:1px solid var(--rule-strong);border-radius:2px}
.field{display:flex;flex-direction:column;gap:8px;margin-bottom:24px;min-width:0}
.field label{font-size:14px;font-weight:600}
.field label span{font-weight:400;color:var(--ink-soft)}
.field input,.field select,.field textarea{min-height:48px;width:100%;min-width:0;border:1px solid var(--ink-soft);border-radius:2px;background:var(--white);color:var(--ink);padding:12px;font-size:16px;line-height:24px}
.field textarea{resize:vertical}
.field input[aria-invalid="true"],.field textarea[aria-invalid="true"],.field select[aria-invalid="true"]{border-color:var(--error)}
.field-hint{font-size:12px;line-height:20px;color:var(--ink-soft)}
.field-hint a{text-decoration:underline}
.field-error{color:var(--error);font-size:12px;line-height:20px}
.field-error:empty{display:none}
.form-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:24px}
.form-panel .sprint-button{width:100%}
.form-status{font-size:14px;line-height:24px;margin-top:16px}
.form-status:empty{margin-top:0}
.form-status.is-error{color:var(--error)}
.form-panel form>.field-hint{margin-top:16px}
#formSuccess{padding:32px 0}
#formSuccess .mono{color:var(--accent)}
#formSuccess h3{margin:16px 0}
#formSuccess p{margin-bottom:24px}
.sprint-footer{padding:48px 0}
.footer-top{display:flex;gap:24px;align-items:center;justify-content:space-between;margin-bottom:32px}
.footer-top img{display:block;height:auto}
.footer-top p{font-size:12px;font-family:var(--mono)}
.footer-top>a:last-child{font-size:14px}
.sprint-footer .footer-links{display:flex;gap:24px;flex-wrap:wrap;font-size:12px;font-family:var(--mono)}
.sprint-footer .footer-links a{min-height:44px;display:flex;align-items:center;color:var(--ink-soft)}
.legal-notes{margin-top:32px;display:grid;gap:16px}
.legal-notes details{scroll-margin-top:96px}
.legal-notes summary{font-size:12px;cursor:pointer;color:var(--ink-soft);width:max-content}
.legal-notes p{font-size:12px;line-height:20px;max-width:100ch;margin-top:12px}
@media(hover:hover) and (pointer:fine){.sprint-button:hover{background:var(--ink);border-color:var(--ink);text-decoration:none}
.decision-list a:hover{color:var(--accent);text-decoration:none}
.text-link:hover{text-decoration:underline}}
@media(min-width:1440px){.hero-copy h1{font-size:48px}}
@media(max-width:1000px){.hero-layout{gap:32px}
.hero-copy h1{font-size:48px}
.two-column,.inquiry-layout{gap:40px}
.investment-layout{gap:48px}
.brief-stage{padding:24px 16px 16px}
.brief-sheet{padding:24px 16px}
.deliverables{grid-template-columns:repeat(2,minmax(0,1fr));gap:32px}
.section-heading{gap:32px}
.work-feature{gap:32px}
.work-preview{padding:24px}
.model-flow{font-size:10px}
.proof-pair{gap:32px}
.compact-preview{padding:24px}
.ceiling-row strong{font-size:14px}}
@media(max-width:760px){.hero-layout,.two-column,.work-feature,.investment-layout,.inquiry-layout{grid-template-columns:minmax(0,1fr);gap:40px}
.hero-layout{padding-bottom:40px}
.hero-copy h1{font-size:48px;max-width:640px}
.hero-lede{font-size:18px;line-height:28px;margin-top:24px}
.hero-copy .sprint-button{width:100%;max-width:400px}
.brief-stage{max-width:480px;width:100%;margin:0 auto;padding:32px}
.brief-sheet{padding:24px}
.availability{flex-wrap:wrap;gap:8px 24px}
.availability p{flex-basis:60%}
.availability a{width:100%;min-height:32px}
.sprint-section,.statement-section{padding:64px 0}
.section-heading{display:block;margin-bottom:32px}
.section-heading>p{margin-top:24px;max-width:60ch}
.deliverables{gap:32px}
.deliverables h3{margin-top:16px}
.walkthrough-note{align-items:start;gap:16px;padding:24px}
.statement-section h2{font-size:36px;line-height:40px}
.statement-section p:last-child{font-size:16px;line-height:24px}
.work-preview{padding:32px}
.model-flow{font-size:12px}
.work-description h3{max-width:24ch}
.proof-pair{grid-template-columns:1fr;gap:40px}
.compact-preview{min-height:0;padding:32px}
.investment-card{padding:32px}
.investment-card .price{font-size:48px}
.inquiry-copy .inquiry-price{display:none}
.inquiry-copy .micro{margin-top:16px}
.form-panel{padding:24px}
.footer-top{flex-wrap:wrap}
.footer-top p{flex:1}
.footer-top>a:last-child{flex-basis:100%}}
@media(max-width:420px){.wrap{padding-left:20px;padding-right:20px}
.hero-copy h1{font-size:36px;line-height:40px}
.hero-copy .eyebrow{font-size:10px}
.hero-lede{font-size:16px;line-height:24px}
.offer-line{font-size:16px;line-height:24px}
.brief-stage{padding:24px 16px}
.brief-sheet{padding:24px 16px}
.brief-sheet h2{font-size:20px;line-height:28px}
.sheet-top span{font-size:8px}
.sheet-foot{font-size:8px}
.brief-stage figcaption{font-size:10px}
.availability::before{left:20px;right:20px}
.availability p{flex-basis:100%}
.availability-label{font-size:12px}
h2{font-size:30px;line-height:36px}
.decision-list a{font-size:18px;line-height:28px;gap:12px}
.deliverables{grid-template-columns:1fr;gap:24px}
.deliverables h3{margin-top:12px}
.walkthrough-note{display:block}
.walkthrough-note p{margin-top:12px}
.work-preview{padding:24px 16px}
.model-flow{font-size:10px;gap:4px}
.model-equation{font-size:16px;line-height:24px}
.model-equation b{font-size:18px}
.preview-top,.preview-bottom{font-size:8px}
.compact-preview{padding:24px}
.ceiling-row{gap:8px}
.ceiling-row strong{font-size:12px}
.research-preview p{font-size:24px;line-height:32px}
.investment-card{padding:24px}
.payment-split{gap:12px}
.form-panel{padding:24px 16px}
.form-grid{grid-template-columns:1fr;gap:0}
.sprint-button{padding:12px 16px;font-size:14px;gap:16px}
.inquiry-copy h2{font-size:36px;line-height:40px}
.sprint-footer .footer-links{gap:8px 24px}}
@media(prefers-reduced-motion:reduce){.brief-sheet{transform:none}}
@media(prefers-contrast:more){.field input,.field select,.field textarea{border-color:var(--ink)}
.brief-sheet,.investment-card,.form-panel{border-color:var(--ink)}}
.proof-index{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:24px;margin-bottom:64px}
.proof-index a{display:flex;align-items:center;gap:16px;padding:16px 24px;border:1px solid var(--rule-strong);border-radius:2px;font-size:14px;line-height:24px;color:var(--ink)}
.proof-index a>span:first-child{font-family:var(--mono);color:var(--accent);font-size:12px}
.proof-index a>span:last-child{margin-left:auto;color:var(--accent)}
.proof-chapter{scroll-margin-top:96px}
.proof-chapter+.proof-chapter{margin-top:80px;padding-top:80px;border-top:1px solid var(--rule-strong)}
.chapter-heading{display:grid;grid-template-columns:80px minmax(0,1fr);gap:32px;margin-bottom:40px;align-items:start}
.chapter-code{font-family:var(--mono);font-size:20px;line-height:28px;color:var(--accent);padding-top:8px}
.chapter-heading h3{font-size:36px;line-height:40px;max-width:26ch}
.chapter-heading p{max-width:70ch;margin-top:16px;font-size:16px;line-height:28px}
.architecture-figure,.gtm-figure,.buyer-figure,.stack-figure{margin:0;border:1px solid var(--rule-strong);border-radius:2px;background:var(--white);padding:32px}
.diagram-heading{display:flex;flex-direction:column;gap:12px;margin-bottom:32px}
.diagram-heading .mono,.node-label{color:var(--accent)}
.diagram-heading>strong{font-family:var(--sans);font-size:24px;line-height:32px;font-weight:500;letter-spacing:-.025em}
.architecture-layout{display:grid;grid-template-columns:minmax(0,2fr) minmax(0,1fr);gap:40px;align-items:start}
.source-pair,.branch-pair{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:24px}
.diagram-node{padding:24px;background:var(--bg);border:1px solid var(--rule-strong);border-radius:2px}
.node-label{font-family:var(--mono);font-size:10px;line-height:16px;letter-spacing:.035em;display:block}
.diagram-node>strong{display:block;font-family:var(--sans);font-size:18px;line-height:24px;font-weight:500;letter-spacing:-.02em;margin-top:8px}
.diagram-node small{display:block;font-size:12px;line-height:20px;color:var(--ink-soft);margin-top:8px}
.merge-connector,.branch-connector{height:32px;position:relative;margin:0 24%}
.merge-connector:before,.branch-connector:before{content:'';position:absolute;inset:0 0 16px;border:solid var(--accent);border-width:0 1px 1px}
.merge-connector i,.branch-connector i{position:absolute;top:16px;left:50%;height:16px;border-left:1px solid var(--accent)}
.merge-connector i:after{content:'';position:absolute;bottom:0;left:-4px;border-left:3px solid transparent;border-right:3px solid transparent;border-top:5px solid var(--accent)}
.branch-connector{transform:rotate(180deg)}
.processing-node{background:var(--accent-soft);border-color:var(--accent)}
.processing-node>strong{color:var(--accent);font-size:20px;line-height:28px}
.diagram-node>p{font-size:12px;line-height:20px;margin-top:12px}
.flow-connector{font-family:var(--mono);color:var(--accent);height:32px;display:grid;place-items:center}
.record-node{background:var(--accent);border-color:var(--accent);color:var(--white)}
.record-node .node-label,.record-node>p{color:var(--white)}
.return-loop{border:1px dashed var(--accent);border-radius:2px;padding:16px;margin-top:24px;display:flex;align-items:center;gap:16px;color:var(--accent)}
.return-loop>span{font-family:var(--mono);font-size:30px}
.return-loop p{font-size:12px;line-height:20px}
.return-loop strong{font-weight:600;color:var(--accent)}
.architecture-notes h4,.outcomes-proof h4,.stack-figure h4{font-family:var(--sans);font-size:20px;line-height:28px;font-weight:500;letter-spacing:-.025em}
.architecture-notes dl{margin:24px 0 0}
.architecture-notes dl>div{margin-top:24px}
.architecture-notes dt{font-weight:600;font-size:14px}
.architecture-notes dd{font-size:14px;line-height:24px;color:var(--ink-soft);margin:8px 0 0}
.outcomes-proof{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,2fr);gap:40px;padding:32px;margin-top:32px;background:var(--bg-raised);border:1px solid var(--rule);border-radius:2px}
.outcomes-proof .mono{color:var(--accent)}
.outcomes-proof h4{margin-top:12px}
.outcome-track{list-style:none;display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:24px;margin:0;padding:0}
.outcome-track li{position:relative}
.outcome-track li:not(:last-child):after{content:'→';position:absolute;right:-16px;top:24px;color:var(--accent)}
.outcome-track span{display:block;font-family:var(--mono);font-size:10px;color:var(--accent)}
.outcome-track strong{display:block;font-family:var(--sans);font-weight:500;font-size:16px;margin-top:8px}
.outcomes-proof>div>p{font-size:12px;line-height:20px;margin-top:24px;max-width:70ch}
.proof-decision{display:grid;grid-template-columns:200px minmax(0,1fr);gap:32px;align-items:baseline;margin-top:32px}
.proof-decision>.mono{color:var(--accent);font-size:10px}
.proof-decision p{font-family:var(--sans);font-size:20px;line-height:28px;color:var(--ink);max-width:60ch}
.proof-detail{margin-top:24px;border:1px solid var(--rule);border-radius:2px;padding:16px 24px}
.proof-detail summary{cursor:pointer;display:flex;justify-content:space-between;align-items:center;gap:16px;font-size:14px;list-style:none;color:var(--accent);min-height:24px}
.proof-detail summary::-webkit-details-marker{display:none}
.proof-detail summary>span{font-size:24px;transition:transform 180ms var(--ease)}
.proof-detail[open] summary>span{transform:rotate(45deg)}
.economics-detail{padding-top:24px;display:grid;grid-template-columns:1fr 1fr;gap:32px}
.economics-detail p{font-size:14px;line-height:24px}
.economics-detail .formula-text{font-family:var(--sans);font-size:20px;line-height:28px;color:var(--ink);margin-top:12px}
.formula-text>span{color:var(--accent)}
.b2b-diagrams{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1.2fr);gap:32px;align-items:stretch}
.gtm-flow{display:flex;flex-direction:column;gap:24px}
.gtm-stage{position:relative;display:flex;align-items:start;gap:16px}
.stage-index{font-family:var(--mono);font-size:10px;width:32px;height:32px;display:grid;place-items:center;flex:none;border:1px solid var(--accent);border-radius:50%;color:var(--accent);background:var(--white);position:relative;z-index:1}
.gtm-stage:not(:last-child):before{content:'';position:absolute;top:32px;left:16px;bottom:-24px;border-left:1px solid var(--rule-strong)}
.gtm-stage h4{font-family:var(--sans);font-size:18px;line-height:24px;font-weight:500;letter-spacing:-.025em}
.gtm-stage p{font-size:12px;line-height:20px;margin-top:8px}
.experiment-checkpoint{margin-top:32px;padding:16px;background:var(--accent-soft);border:1px solid var(--rule);border-radius:2px}
.experiment-checkpoint>.mono{font-size:10px;color:var(--accent)}
.experiment-checkpoint p{font-family:var(--sans);font-size:14px;color:var(--ink);margin-top:8px}
.experiment-checkpoint p>span{padding:0 4px;color:var(--accent)}
.buyer-map{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:24px;position:relative}
.buyer-role{padding:24px 16px;border:1px solid var(--rule-strong);background:var(--bg);border-radius:2px;position:relative}
.buyer-role h4{font-family:var(--sans);font-size:18px;line-height:24px;font-weight:500;margin:12px 0;letter-spacing:-.025em}
.buyer-role p{font-size:12px;line-height:20px}
.buying-center{grid-column:1/-1;text-align:center;background:var(--accent);color:var(--white);padding:24px 16px;border-radius:2px;position:relative}
.buying-center strong{display:block;font-family:var(--sans);font-size:20px;line-height:28px;font-weight:500;margin-top:8px}
.buying-center .mono{font-size:10px}
.buyer-role:nth-child(-n+2):after{content:'';position:absolute;bottom:-25px;left:50%;height:24px;border-left:1px solid var(--accent)}
.buyer-role:nth-last-child(-n+2):before{content:'';position:absolute;top:-25px;left:50%;height:24px;border-left:1px solid var(--accent)}
.buyer-map-note{font-size:12px;line-height:20px;margin-top:24px}
.stack-figure{margin-top:32px;background:var(--bg-raised)}
.stack-figure figcaption>.mono{color:var(--accent)}
.stack-figure h4{margin-top:12px}
.stack-track{list-style:none;display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:32px;padding:0;margin:32px 0 0}
.stack-track li{position:relative}
.stack-track li:not(:last-child):after{content:'→';position:absolute;right:-24px;top:24px;color:var(--accent)}
.stack-track strong{display:block;font-family:var(--sans);font-weight:500;font-size:18px;line-height:24px;margin-top:8px}
.stack-track small{display:block;color:var(--ink-soft);font-size:12px;line-height:20px;margin-top:8px}
.stack-figure>p{font-size:12px;line-height:20px;margin-top:32px;max-width:90ch}
.public-research{display:flex;align-items:center;justify-content:space-between;gap:40px;margin-top:64px;padding-top:40px;border-top:1px solid var(--rule)}
.public-research .mono{color:var(--accent)}
.public-research h3{font-size:24px;line-height:32px;margin-top:12px}
.public-research p{font-size:14px;line-height:24px;margin-top:12px;max-width:64ch}
.public-research .text-link{white-space:nowrap;flex:none}
.proof-section .research-note{max-width:100ch;font-size:12px;line-height:20px;margin-top:32px}
@media(hover:hover) and (pointer:fine){.proof-index a:hover{background:var(--accent-soft);text-decoration:none}}
@media(max-width:1000px){.architecture-layout{grid-template-columns:minmax(0,1.7fr) minmax(0,1fr);gap:24px}
.diagram-node{padding:16px}
.b2b-diagrams{grid-template-columns:1fr}
.buyer-map{grid-template-columns:repeat(2,minmax(0,1fr))}
.buyer-role{padding:24px}
.gtm-flow{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:24px}
.gtm-stage:before{display:none}
.gtm-stage:last-child{grid-column:1/-1}
.outcomes-proof{grid-template-columns:1fr}
.stack-track{gap:24px}
.stack-track li:not(:last-child):after{right:-16px}}
@media(max-width:760px){.proof-index{grid-template-columns:1fr;gap:16px;margin-bottom:40px}
.proof-index a{padding:16px;font-size:12px;gap:12px}
.chapter-heading{grid-template-columns:1fr;gap:12px;margin-bottom:24px}
.chapter-code{font-size:14px;line-height:20px;padding:0}
.chapter-heading h3{font-size:30px;line-height:36px}
.architecture-figure,.gtm-figure,.buyer-figure,.stack-figure{padding:24px}
.architecture-layout{grid-template-columns:1fr;gap:32px}
.architecture-notes dl{display:grid;grid-template-columns:1fr 1fr;gap:24px}
.architecture-notes dl>div{margin:0}
.architecture-notes dd{font-size:12px;line-height:20px}
.diagram-heading>strong{font-size:20px;line-height:28px}
.source-pair,.branch-pair{gap:16px}
.diagram-node>strong{font-size:16px;line-height:24px}
.diagram-node .node-label{font-size:10px}
.diagram-node small{font-size:12px}
.outcomes-proof{padding:24px;gap:24px}
.outcome-track{gap:16px}
.outcome-track strong{font-size:14px}
.outcome-track li:not(:last-child):after{right:-12px;font-size:12px}
.proof-decision{grid-template-columns:1fr;gap:12px}
.proof-decision p{font-size:18px;line-height:28px}
.proof-chapter+.proof-chapter{margin-top:48px;padding-top:48px}
.economics-detail{grid-template-columns:1fr;gap:24px}
.gtm-flow{display:flex;gap:24px}
.gtm-stage:not(:last-child):before{display:block}
.buyer-role{padding:16px}
.buyer-role h4{font-size:16px;line-height:24px}
.buyer-map{gap:24px 16px}
.stack-track{grid-template-columns:repeat(2,minmax(0,1fr));gap:32px}
.stack-track li:after{display:none}
.public-research{flex-direction:column;align-items:start;gap:16px;margin-top:48px}
.public-research .text-link{white-space:normal}}
@media(max-width:420px){.architecture-figure,.gtm-figure,.buyer-figure,.stack-figure{padding:24px 16px}
.source-pair,.branch-pair{grid-template-columns:1fr;gap:16px}
.merge-connector:before,.branch-connector:before{border:0;left:50%;border-left:1px solid var(--accent)}
.diagram-node{padding:16px}
.architecture-notes dl{grid-template-columns:1fr;gap:24px}
.outcomes-proof{padding:24px 16px}
.outcome-track{grid-template-columns:1fr 1fr;gap:24px}
.outcome-track li:after{display:none}
.outcome-track strong{font-size:16px}
.buyer-map{grid-template-columns:1fr;gap:16px}
.buyer-role:nth-child(-n+2):after,.buyer-role:nth-last-child(-n+2):before{height:16px}
.buyer-role:nth-child(-n+2):after{bottom:-17px}
.buyer-role:nth-last-child(-n+2):before{top:-17px}
.buying-center{grid-row:1}
.buyer-role:before,.buyer-role:after{display:none}
.buyer-role{padding:16px}
.stack-track{grid-template-columns:1fr;gap:24px}
.stack-track li{padding-left:16px;border-left:1px solid var(--accent)}
.chapter-heading h3{font-size:24px;line-height:32px}
.proof-index a{font-size:12px;flex-wrap:wrap}
.proof-index a>span:last-child{display:none}}
@media(prefers-reduced-motion:reduce){.proof-detail summary>span{transition:none}}
.hero-sample-link{margin-top:16px;font-size:14px}
.scope-package{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:40px;margin-top:32px;padding-top:32px;border-top:1px solid var(--rule-strong)}
.scope-package h3,.buyer-inputs h3{font-size:20px;line-height:28px;margin-bottom:12px}
.scope-package p,.buyer-inputs p{font-size:14px;line-height:24px}
.sample-brief{padding:40px;background:var(--white);border:1px solid var(--rule-strong);border-radius:2px;scroll-margin-top:96px}
.sample-masthead{display:flex;align-items:center;justify-content:space-between;gap:24px;padding-bottom:24px;border-bottom:1px solid var(--rule)}
.sample-masthead img{width:56px;height:auto;flex:none}
.sample-masthead .mono,.sample-brief .mono,.delivery-lead .mono{color:var(--accent)}
.sample-disclosure{font-size:12px;line-height:20px;margin-top:16px;max-width:90ch}
.sample-question{margin:32px 0}
.sample-question h3{font-size:30px;line-height:36px;margin:12px 0 16px;max-width:34ch}
.sample-question>p{font-size:16px;line-height:26px;max-width:78ch}
.sample-evidence,.sample-next{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:40px}
.sample-evidence>div{min-width:0}
.sample-brief h4{font-family:var(--sans);font-size:20px;line-height:28px;font-weight:500;letter-spacing:-.02em;margin:12px 0 20px}
.sample-ledger{border-top:1px solid var(--rule)}
.sample-ledger>div{display:grid;grid-template-columns:minmax(0,1fr) auto;gap:20px;padding:14px 0;border-bottom:1px solid var(--rule);align-items:baseline}
.sample-ledger dt{font-size:14px;line-height:22px;color:var(--ink-soft)}
.sample-ledger dd{font-family:var(--sans);font-size:20px;line-height:28px;color:var(--ink);font-variant-numeric:tabular-nums}
.sample-note{font-size:12px;line-height:20px;margin-top:16px}
.sample-verdict{background:var(--accent-soft);padding:24px;margin:32px 0;border:1px solid var(--rule);border-radius:2px}
.sample-verdict h4{font-size:24px;line-height:32px;color:var(--accent);margin-bottom:12px}
.sample-verdict p,.sample-next p{font-size:14px;line-height:24px}
.sample-next p{margin-top:12px}
.sample-foot{display:flex;justify-content:space-between;align-items:center;gap:24px;margin-top:32px;padding-top:24px;border-top:1px solid var(--rule)}
.sample-foot p{font-size:12px;line-height:20px;max-width:48ch}
.sample-foot .text-link{flex:none}
.delivery-lead{display:grid;grid-template-columns:minmax(0,.8fr) minmax(0,1.2fr);gap:64px;padding:40px 0;margin-top:32px;border-bottom:1px solid var(--rule)}
.delivery-lead h3{font-size:30px;line-height:36px;margin-top:12px}
.delivery-lead .lead-role{font-size:14px;margin:8px 0 16px}
.delivery-lead>div:last-child p{font-size:16px;line-height:28px}
.delivery-lead>div:last-child p+p{margin-top:16px}
.methods-detail{margin-top:32px}
.methods-detail>summary{font-size:18px;line-height:28px;padding:20px 0}
.methods-content{padding-top:24px}
.methods-intro{font-size:14px;line-height:24px;max-width:90ch;margin-bottom:24px}
.buyer-inputs{margin-top:32px;padding-top:24px;border-top:1px solid var(--rule-strong)}
.buyer-inputs p+p{margin-top:16px}
.payment-note{font-size:12px;line-height:20px;margin-top:12px}
.investment-card .price-tax{font-size:12px;line-height:20px;margin-top:8px}
@media(max-width:1000px){.sample-brief{padding:32px}
.sample-evidence,.sample-next{gap:24px}
.delivery-lead{gap:40px}}
@media(max-width:760px){.scope-package,.sample-evidence,.sample-next,.delivery-lead{grid-template-columns:minmax(0,1fr);gap:32px}
.sample-brief{padding:24px}
.sample-question h3{font-size:24px;line-height:32px}
.sample-question h3 br{display:none}
.sample-foot{align-items:start;flex-direction:column;gap:12px}
.delivery-lead{padding:32px 0}
.sample-ledger>div{gap:16px}
.sample-masthead{align-items:start;gap:16px}
.sample-masthead .mono{max-width:20ch;text-align:right}
.methods-detail>summary{font-size:16px;line-height:24px}}
@media(max-width:420px){.sample-brief{padding:24px 16px}
.sample-ledger dd{font-size:18px;line-height:26px}
.sample-ledger dt{font-size:13px;line-height:22px}
.sample-verdict{padding:20px 16px}
.sample-question h3{font-size:24px;line-height:32px}}