:root{--paper:#f6f7f9;--white:#fff;--ink:#172b34;--muted:#59676e;--faint:#748087;--line:#d9dfe3;--accent:#244fc8;--accent-soft:#eaf0fe;--rail:204px;--header:74px;--sans:-apple-system,BlinkMacSystemFont,"Segoe UI",Helvetica,Arial,sans-serif;--serif:"Iowan Old Style","Palatino Linotype",Georgia,serif;--mono:"SFMono-Regular",Consolas,"Liberation Mono",monospace}
*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:var(--header)}body{margin:0;background:var(--paper);color:var(--ink);font-family:var(--sans);font-size:16px;line-height:1.5;-webkit-font-smoothing:antialiased}button,a{-webkit-tap-highlight-color:transparent}button{font:inherit;color:inherit;cursor:pointer}a{color:inherit;text-decoration:none}button:focus-visible,a:focus-visible,summary:focus-visible{outline:2px solid var(--accent);outline-offset:5px}button:disabled{cursor:default}::selection{background:#d8e3ff;color:var(--ink)}h1,h2,h3,p{margin:0}h1,h2,h3{font-weight:500}h1{font-size:clamp(3rem,4.55vw,4.65rem);line-height:1.05;letter-spacing:-.055em}h2{font-size:clamp(2.3rem,3.5vw,3.5rem);line-height:1.1;letter-spacing:-.047em}h3{font-size:1.35rem;line-height:1.3;letter-spacing:-.025em}em{font-family:var(--serif);font-weight:400;letter-spacing:-.04em;color:var(--accent)}.eyebrow{display:flex;align-items:center;justify-content:space-between;gap:16px;font-family:var(--mono);font-size:.75rem;line-height:1.5;font-weight:500;letter-spacing:.075em;color:var(--muted)}.mono{font-family:var(--mono);font-size:.75rem;color:var(--muted)}.edition{font-size:.75rem;letter-spacing:.03em}.fine-print{font-size:.8125rem;line-height:1.6;color:var(--muted)}.skip-link{position:fixed;z-index:100;top:-60px;left:16px;padding:12px;background:var(--white);color:var(--accent)}.skip-link:focus{top:12px}.masthead{height:var(--header);position:fixed;top:0;left:0;right:0;z-index:40;display:flex;align-items:center;justify-content:space-between;gap:24px;padding:0 30px;border-bottom:1px solid var(--line);background:var(--paper)}.wordmark{display:flex;gap:13px;align-items:center;font-size:.8125rem;font-weight:650;letter-spacing:.09em;white-space:nowrap}.wordmark-light{font-weight:400;letter-spacing:.06em;color:var(--muted)}.mark{width:20px;height:20px;display:inline-block;background:linear-gradient(90deg,var(--accent) 45%,transparent 45%,transparent 55%,var(--accent) 55%);border-top:8px solid var(--accent);border-bottom:8px solid var(--accent)}.masthead-meta{display:flex;gap:14px;font-size:.8125rem;color:var(--muted)}.meta-divider{color:#a6afb5}.text-button{background:none;padding:5px 0;border:0;font-size:.8125rem;color:var(--muted);display:inline-flex;align-items:center;gap:12px}.text-button:hover{color:var(--accent)}.rail{position:fixed;z-index:30;top:var(--header);bottom:0;left:0;width:var(--rail);border-right:1px solid var(--line);padding:43px 25px 29px;display:flex;flex-direction:column}.rail-eyebrow{font-family:var(--mono);font-size:.75rem;color:var(--faint);letter-spacing:.05em;line-height:1.7}.chapter-nav{display:flex;flex-direction:column;margin:31px -25px 0;gap:7px}.chapter-nav a{display:flex;align-items:center;gap:15px;padding:12px 22px;border-left:3px solid transparent;color:var(--muted);font-size:.875rem;line-height:1.4;transition:color .2s,background .2s}.chapter-nav a span{font-family:var(--mono);font-size:.75rem;color:var(--faint)}.chapter-nav a:hover{color:var(--accent);background:#eef1f6}.chapter-nav a.active{border-left-color:var(--accent);color:var(--accent);background:linear-gradient(90deg,#eaf0fd,transparent)}.chapter-nav a.active span{color:var(--accent)}.rail-bottom{margin-top:auto;display:flex;flex-direction:column;gap:11px;color:var(--muted);font-size:.75rem}.rail-progress{height:2px;background:var(--line);width:100%;margin-bottom:5px}.rail-progress i{height:100%;width:0;background:var(--accent);display:block;transition:width .3s}.keyboard-hint{max-width:150px;color:var(--faint);line-height:1.6}
main{margin-left:var(--rail);padding-top:var(--header)}.chapter{min-height:calc(100svh - var(--header));padding:51px clamp(30px,4.5vw,80px) 32px;border-bottom:1px solid var(--line);scroll-margin-top:0;position:relative;max-width:1620px;margin:0 auto}.chapter>.eyebrow{margin-bottom:28px}.opening{padding-top:43px;display:flex;flex-direction:column;justify-content:space-between;min-height:max(690px,calc(100svh - var(--header)))}.opening-grid{display:grid;grid-template-columns:1.26fr 1fr;gap:55px;align-items:start;margin-top:13px}.lead{font-size:1.125rem;color:var(--muted);max-width:385px;line-height:1.6;margin-top:26px}.signal-note{border-left:1px solid var(--line);padding:5px 0 4px 30px;margin-top:5px}.signal-note .eyebrow{font-size:.75rem}.signal-note h2{font-size:1.7rem;letter-spacing:-.045em;margin:20px 0 15px;white-space:nowrap}.signal-note h2 span{color:var(--accent);font-weight:300;margin:0 4px}.signal-note p{font-size:1rem;line-height:1.65;color:var(--muted);max-width:370px}.signal-capabilities{display:grid;grid-template-columns:1.5fr 1fr;gap:7px 16px;margin:20px 0 18px;font-size:.8125rem;color:var(--ink)}.signal-capabilities span{border-top:1px solid var(--line);padding-top:7px}.source-link{font-family:var(--mono);font-size:.75rem;color:var(--muted);display:inline-flex;gap:18px}.source-link:hover,.inline-source:hover{color:var(--accent)}.question-shift{display:grid;grid-template-columns:1fr 70px 1.65fr;align-items:center;gap:25px;border-top:1px solid var(--line);padding-top:30px;margin-top:40px}.question-shift .eyebrow{margin-bottom:16px}.old-question p{font-size:1.55rem;line-height:1.4;letter-spacing:-.035em;color:var(--faint)}.shift-arrow{font-size:2rem;color:var(--faint);font-weight:300}.emerging-question .eyebrow{color:var(--accent)}.emerging-question p{font-size:clamp(1.6rem,2.25vw,2.3rem);line-height:1.3;letter-spacing:-.04em;max-width:560px}.chapter-bottom{display:flex;align-items:center;justify-content:space-between;gap:24px;margin-top:32px;min-height:40px;color:var(--muted);font-size:.875rem}.chapter-bottom strong{color:var(--ink);font-weight:500}.next-link{display:inline-flex;align-items:center;gap:25px;color:var(--ink);font-size:.875rem;white-space:nowrap}.next-link span{font-size:1.2rem;color:var(--accent);transition:transform .2s}.next-link:hover{color:var(--accent)}.next-link:hover span{transform:translateY(3px)}.section-heading{display:flex;justify-content:space-between;align-items:flex-end;gap:35px}.section-heading>p{max-width:300px;color:var(--muted);font-size:1rem;line-height:1.65;margin-bottom:3px}.section-intro{color:var(--muted);max-width:760px;margin:23px 0 0;font-size:1.05rem;line-height:1.7}
.instrument{margin-top:32px;border:1px solid var(--line);background:var(--white);border-radius:2px;overflow:hidden}.instrument-bar,.instrument-foot{display:flex;align-items:center;justify-content:space-between;gap:20px;padding:16px 23px}.instrument-bar{border-bottom:1px solid #e7ebee}.instrument-label{font-family:var(--mono);font-size:.75rem;letter-spacing:.05em;color:var(--faint)}.segmented{display:flex;background:var(--paper);padding:3px;border:1px solid var(--line);gap:3px;border-radius:4px}.segmented button{border:0;background:transparent;padding:9px 16px;font-size:.875rem;border-radius:2px;color:var(--muted);transition:background .2s,color .2s}.segmented button.selected{background:var(--ink);color:#fff}.workflow{height:370px;position:relative;transition:height .65s cubic-bezier(.2,.7,.3,1);margin:0 20px}.workflow-lines{width:100%;height:100%;position:absolute;inset:0;color:var(--line);overflow:visible;pointer-events:none}.workflow-lines path{fill:none;stroke:var(--line);stroke-width:1.4}.workflow-lines marker path{fill:none;stroke:var(--muted);stroke-width:1}.workflow-lines .learning-line{opacity:0;stroke:var(--accent);stroke-dasharray:3 5;transition:opacity .5s;stroke-width:1.25}.workflow-lines .learning-return{opacity:0;stroke:#b6c5ec;stroke-dasharray:3 5}.linear-line{transition:opacity .3s}.workflow-node{position:absolute;width:17%;text-align:center;left:50%;top:50%;padding:15px 4px;background:var(--white);transform:translate(-50%,-50%);transition:left .65s cubic-bezier(.2,.7,.3,1),top .65s cubic-bezier(.2,.7,.3,1),opacity .3s,width .5s;z-index:2}.node-number{font-family:var(--mono);font-size:.75rem;color:var(--faint);display:block;margin-bottom:9px}.workflow-node strong{display:block;font-weight:500;font-size:1rem;line-height:1.4}.workflow-node small{display:none;font-size:.8125rem;line-height:1.4;color:var(--muted);margin-top:5px}.is-linear .wn1{left:10%}.is-linear .wn2{left:30%}.is-linear .wn3{left:50%}.is-linear .wn4{left:70%}.is-linear .wn5{left:90%}.is-linear .wn6{opacity:0;left:10%;visibility:hidden}.workflow-center{position:absolute;left:50%;top:50%;transform:translate(-50%,-50%);text-align:center;opacity:0;transition:opacity .4s;max-width:250px}.workflow-center .eyebrow{display:block;color:var(--accent);font-size:.75rem;margin-bottom:12px}.workflow-center strong{font-weight:500;font-size:1.45rem;line-height:1.2;letter-spacing:-.035em;display:block}.workflow-center small{font-size:.8125rem;color:var(--muted);display:block;margin-top:12px}.is-learning{height:420px}.is-learning .linear-line{opacity:0}.is-learning .learning-line,.is-learning .learning-return{opacity:1}.is-learning .workflow-center{opacity:1;transition-delay:.25s}.is-learning .workflow-node{width:24%;padding:7px 10px}.is-learning .workflow-node small{display:block}.is-learning .node-number{color:var(--accent);margin-bottom:3px}.is-learning .wn1{left:50%;top:13%}.is-learning .wn2{left:85%;top:37%}.is-learning .wn3{left:85%;top:70%}.is-learning .wn4{left:50%;top:87%}.is-learning .wn5{left:15%;top:70%}.is-learning .wn6{left:15%;top:37%;opacity:1;visibility:visible}.instrument-foot{border-top:1px solid #e7ebee;min-height:69px}.instrument-foot p{font-size:.875rem;color:var(--muted);max-width:690px}.model-note{font-family:var(--mono);font-size:.75rem;color:var(--faint);white-space:nowrap}
.operating-models{display:grid;grid-template-columns:1fr 1fr 1.32fr;margin-top:35px;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}.model-choice{position:relative;display:block;text-align:left;background:none;border:0;border-right:1px solid var(--line);padding:25px 25px 23px;transition:background .2s;min-width:0}.model-choice:first-child{padding-left:0}.model-choice:last-child{border-right:0}.model-choice:after{content:"";position:absolute;bottom:-1px;left:0;right:0;height:3px;background:transparent}.model-choice.selected:after{background:var(--accent)}.model-choice:hover{background:#edf1f6}.model-choice strong{display:block;font-size:clamp(2.1rem,3.7vw,3.8rem);font-weight:450;letter-spacing:-.065em;line-height:1.3;margin:13px 0 7px}.model-choice strong span{color:var(--faint)}.model-choice.selected strong,.model-choice.selected strong span,.model-choice.selected .eyebrow{color:var(--accent)}.model-choice-caption{font-size:.875rem;color:var(--muted)}.model-select{position:absolute;bottom:22px;right:25px;color:var(--faint);font-size:1.1rem}.model-choice.selected .model-select{color:var(--accent)}.model-detail{display:grid;grid-template-columns:1.15fr 1fr 1fr;gap:30px;padding:27px 0 21px;min-height:225px}.model-summary{font-size:1.1rem;line-height:1.5;letter-spacing:-.02em;padding-right:10px}.model-summary small{display:block;font-size:.875rem;line-height:1.65;color:var(--muted);letter-spacing:0;margin-top:15px}.model-details-column .eyebrow{margin-bottom:12px}.model-details-column ul{list-style:none;margin:0;padding:0}.model-details-column li{font-size:.9375rem;color:var(--muted);margin:0 0 12px;line-height:1.55;padding-left:14px;position:relative}.model-details-column li:before{content:"·";position:absolute;left:0;color:var(--accent)}.independent-thesis{padding-top:24px;border-top:1px solid var(--line);margin-top:25px;display:grid;grid-template-columns:1fr 2.05fr;gap:25px}.independent-thesis>.eyebrow{align-self:start;justify-content:start;margin-top:6px;color:var(--accent)}.independent-thesis p{font-size:clamp(1.4rem,2vw,1.8rem);line-height:1.35;letter-spacing:-.035em}.independent-thesis strong{font-weight:500;color:var(--accent)}
.precision-chapter{background:#f9fafc;padding-top:50px}.precision-context{max-width:860px;color:var(--muted);font-size:1rem;line-height:1.65;margin:20px 0 0}.inline-source{font-family:var(--mono);font-size:.75rem;color:var(--accent)}.system-premise{font-size:1.0625rem;margin:20px 0 25px}.objective-choices{display:grid;grid-template-columns:repeat(3,1fr);border-top:1px solid var(--line);border-left:1px solid var(--line)}.objective-choice{background:none;border:0;border-right:1px solid var(--line);border-bottom:1px solid var(--line);padding:14px 16px;text-align:left;display:flex;align-items:center;gap:12px;font-size:.875rem;line-height:1.4;min-height:56px}.objective-choice .objective-num{font-family:var(--mono);font-size:.75rem;color:var(--faint)}.objective-choice:hover{background:#edf1fa}.objective-choice.selected{background:var(--ink);color:var(--white)}.objective-choice.selected .objective-num{color:#b4c3df}.objective-workspace{display:grid;grid-template-columns:1.4fr 1fr;gap:24px;margin-top:22px;align-items:stretch}.decision-map{min-width:0;position:relative;height:460px;background:var(--white);border:1px solid var(--line)}.decision-path{position:absolute;inset:0;width:100%;height:100%;color:var(--accent);pointer-events:none}.orbit{fill:none;stroke:#b8c6dd;stroke-width:1.1;stroke-dasharray:2 5}.decision-feedback{fill:none;stroke:var(--accent);stroke-width:1;stroke-dasharray:3 3}.objective-center{position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);width:34%;text-align:center}.objective-center>.eyebrow{justify-content:center;color:var(--accent);font-size:.75rem;letter-spacing:.025em}.objective-center h3{font-size:clamp(1.1rem,1.6vw,1.55rem);line-height:1.15;letter-spacing:-.035em;margin:12px 0 15px;font-weight:500}.center-caption{font-size:.75rem;line-height:1.5;color:var(--faint);display:block}.stage-node{background:var(--white);border:1px solid transparent;position:absolute;transform:translate(-50%,-50%);width:30%;min-height:74px;padding:8px 4px;text-align:center;border-radius:3px;transition:background .25s,border-color .25s,box-shadow .25s}.stage-node:hover{background:#f0f4fd}.stage-node.selected{background:var(--accent-soft);border-color:#c7d5f9}.stage-label{font-family:var(--mono);font-size:.75rem;line-height:1.4;color:var(--muted);letter-spacing:.01em;display:block}.stage-node.selected .stage-label{color:var(--accent)}.stage-output{font-size:.875rem;line-height:1.3;display:block;margin-top:5px;padding:0 3px}.stage-node:nth-child(1){left:50%;top:10%}.stage-node:nth-child(2){left:83.3%;top:30%}.stage-node:nth-child(3){left:83.3%;top:70%}.stage-node:nth-child(4){left:50%;top:90%}.stage-node:nth-child(5){left:16.7%;top:70%}.stage-node:nth-child(6){left:16.7%;top:30%}.decision-detail{border-top:1px solid var(--line);padding:20px 0 0 8px;display:flex;flex-direction:column;min-width:0}.detail-top{display:flex;align-items:center;justify-content:space-between;gap:10px}.detail-top .eyebrow{font-size:.75rem;letter-spacing:.025em}#stage-detail{margin-top:24px;min-height:202px}#stage-detail h3{font-size:1.5rem;letter-spacing:-.035em;margin-bottom:15px}#stage-detail p{font-size:1rem;line-height:1.65;color:var(--muted)}#stage-detail .stage-decision-question{margin-top:20px;padding-left:14px;border-left:2px solid var(--accent);color:var(--ink);font-size:1rem}.decision-standard{border-top:1px solid var(--line);padding-top:15px;margin-top:auto}.decision-standard .eyebrow{font-size:.75rem}.decision-standard p{font-size:.875rem;line-height:1.55;color:var(--muted);margin-top:8px}.trace-button{display:flex;gap:12px;align-items:center;align-self:start;padding:0;background:none;border:0;font-size:.875rem;color:var(--accent);margin:19px 0 0}.trace-icon{font-size:1.5rem;line-height:1}.next-decision{border:1px solid #cbd6ed;background:var(--accent-soft);padding:18px 22px;display:flex;align-items:center;gap:20px;margin-top:22px;transition:background .3s}.next-decision.cycle-complete{background:#dae5ff}.return-mark{font-size:1.8rem;color:var(--accent)}.next-decision .eyebrow{font-size:.75rem;color:var(--accent)}.next-decision p{font-size:1rem;margin-top:5px;line-height:1.5}.decision-return{margin-left:auto;color:var(--muted);font-size:.75rem;white-space:nowrap;font-family:var(--mono)}.precision-chapter .chapter-bottom{align-items:flex-start}.precision-chapter .chapter-bottom .fine-print{max-width:550px}.changing .stage-output{animation:reconsider .45s both}.changing .stage-node:nth-child(2) .stage-output{animation-delay:50ms}.changing .stage-node:nth-child(3) .stage-output{animation-delay:100ms}.changing .stage-node:nth-child(4) .stage-output{animation-delay:150ms}.changing .stage-node:nth-child(5) .stage-output{animation-delay:200ms}.changing .stage-node:nth-child(6) .stage-output{animation-delay:250ms}.tracing .orbit{stroke:var(--accent);stroke-width:1.6;animation:flow 1.5s linear infinite}.updated{animation:reconsider .35s both}@keyframes reconsider{from{opacity:.2;transform:translateY(4px)}to{opacity:1;transform:translateY(0)}}@keyframes flow{to{stroke-dashoffset:-28}}
.capability-head{display:grid;grid-template-columns:1fr 1.1fr 1.55fr 30px;gap:22px;padding:0 0 13px;margin-top:35px;font-family:var(--mono);font-size:.75rem;color:var(--faint);letter-spacing:.045em}.capability{border-top:1px solid var(--line)}.capability:last-child{border-bottom:1px solid var(--line)}.capability summary{list-style:none;display:grid;grid-template-columns:1fr 1.1fr 1.55fr 30px;gap:22px;align-items:center;padding:21px 0;cursor:pointer;font-size:1rem}.capability summary::-webkit-details-marker{display:none}.capability-name{font-weight:500}.capability-from{color:var(--muted);font-size:.9375rem}.capability-toward{color:var(--ink);font-size:.9375rem}.capability-plus{font-size:1.4rem;line-height:1;text-align:right;color:var(--faint);transition:transform .2s}.capability[open] .capability-plus{transform:rotate(45deg);color:var(--accent)}.capability[open] .capability-name,.capability[open] .capability-toward{color:var(--accent)}.capability-detail{display:grid;grid-template-columns:1fr 2.95fr;gap:22px;padding:0 0 23px}.capability-detail>.eyebrow{align-self:start;justify-content:start;padding-top:5px;font-size:.75rem}.capability-detail p{max-width:710px;color:var(--muted);font-size:.9375rem;line-height:1.7}.account-economics{display:grid;grid-template-columns:1fr 1fr;gap:45px;border-top:1px solid var(--line);padding-top:30px;margin-top:38px}.economics-context>.eyebrow{font-size:.75rem;line-height:1.7}.economics-context h3{font-size:1.45rem;margin:16px 0 13px;letter-spacing:-.035em}.economics-context p{color:var(--muted);font-size:.9375rem;line-height:1.65}.economics-context>.fine-print{display:block;font-size:.75rem;margin-top:16px}.economics-principles{display:flex;flex-direction:column;gap:17px}.economics-principles>div{display:flex;gap:15px;align-items:baseline}.economics-principles>div>span{font-size:.75rem;font-family:var(--mono);color:var(--accent)}.economics-principles p{font-size:.9375rem;color:var(--muted);line-height:1.6}.economics-principles strong{color:var(--ink);font-weight:500}
.closing{padding-top:56px;display:flex;flex-direction:column;justify-content:center;min-height:calc(100svh - var(--header));border-bottom:0}.closing>.eyebrow{color:var(--accent);margin-bottom:29px}.closing-premise{font-size:1.25rem;line-height:1.55;letter-spacing:-.025em;max-width:790px}.closing-bridge{max-width:760px;margin-top:18px;font-size:1.05rem;line-height:1.7;color:var(--muted)}.closing-rule{width:55px;height:2px;background:var(--accent);margin:37px 0 32px}.closing h2{font-size:clamp(2.5rem,4.2vw,4.3rem);line-height:1.16;letter-spacing:-.05em;max-width:1070px}.closing h2 em{font-style:italic}.closing-tools{display:flex;gap:35px;margin-top:35px;align-items:center}.colophon{font-size:.75rem;color:var(--faint);line-height:1.6;padding-top:38px;margin-top:28px;border-top:1px solid var(--line)}
dialog{border:1px solid var(--line);border-radius:6px;background:var(--paper);color:var(--ink);width:min(760px,calc(100vw - 36px));max-height:calc(100svh - 70px);padding:30px 36px;box-shadow:0 30px 120px #172b3424}dialog::backdrop{background:#12222b60;backdrop-filter:blur(3px)}.dialog-header{display:flex;align-items:center;justify-content:space-between;margin-bottom:12px}.icon-button{border:1px solid var(--line);border-radius:50%;background:none;line-height:1;width:34px;height:34px;font-size:1.4rem;color:var(--muted)}.icon-button:hover{border-color:var(--accent);color:var(--accent)}dialog h2{font-size:2rem;letter-spacing:-.045em}.dialog-intro{font-size:1rem;line-height:1.6;color:var(--muted);margin:16px 0 28px}.source-entry{display:flex;gap:23px;border-top:1px solid var(--line);padding:24px 0}.source-number{font-family:var(--mono);font-size:.8125rem;color:var(--accent);padding-top:2px}.source-entry h3{font-size:1.125rem;margin:9px 0}.source-entry p{font-size:.9375rem;color:var(--muted);line-height:1.65}.source-entry a{font-size:.875rem;color:var(--accent);display:inline-block;margin-top:11px}.source-entry .source-boundary{font-size:.8125rem;margin-top:13px}.source-entry .eyebrow{font-size:.75rem;letter-spacing:.03em}.noscript-note{padding:20px;position:fixed;bottom:0;background:var(--ink);color:white;z-index:60;font-size:.875rem}
@media(min-width:1600px){:root{--rail:230px}.rail{padding-left:32px;padding-right:32px}.chapter-nav{margin-left:-32px;margin-right:-32px}.chapter-nav a{padding-left:29px}.chapter{padding-left:80px;padding-right:80px}.opening-grid{gap:70px}.lead{max-width:490px}.signal-note p{max-width:430px}.decision-map{height:500px}.stage-node{width:28%}.stage-output{font-size:1rem}.stage-label{font-size:.8125rem}.objective-center h3{font-size:1.7rem}}
@media(max-width:1250px){:root{--rail:175px}.masthead{padding:0 23px}.masthead-meta{font-size:.75rem}.rail{padding-left:20px;padding-right:20px}.chapter-nav{margin-left:-20px;margin-right:-20px}.chapter-nav a{padding-left:17px;gap:12px}.rail-eyebrow{font-size:.75rem;letter-spacing:0}.chapter{padding-left:36px;padding-right:36px}.opening-grid{gap:30px;grid-template-columns:1.15fr 1fr}.signal-note{padding-left:22px}.signal-note h2{font-size:1.5rem}.signal-capabilities{grid-template-columns:1fr 1fr;font-size:.8125rem;gap:7px 8px}.question-shift{gap:18px;grid-template-columns:1fr 35px 1.65fr}.model-choice{padding-left:18px;padding-right:18px}.model-choice>.eyebrow{font-size:.75rem;letter-spacing:.015em}.model-select{right:14px}.model-detail{gap:22px}.model-choice-caption{font-size:.8125rem}.objective-workspace{grid-template-columns:1.35fr 1fr;gap:20px}.decision-map{height:450px}.stage-node{width:31.5%;padding-left:2px;padding-right:2px}.stage-label{font-size:.75rem;letter-spacing:-.025em}.stage-output{font-size:.875rem}.objective-center{width:34%}.objective-center>.eyebrow{font-size:.75rem;line-height:1.4;letter-spacing:-.03em}.objective-center h3{font-size:1.3rem}.decision-return{display:none}.capability-head,.capability summary{gap:15px;grid-template-columns:1fr 1.1fr 1.45fr 22px}.section-heading>p{max-width:255px}.account-economics{gap:30px}}
@media(max-width:1000px){:root{--rail:148px;--header:68px}.masthead-meta{display:none}.wordmark{font-size:.75rem}.rail{padding:30px 15px 24px}.rail-eyebrow{font-size:.75rem;line-height:1.6}.chapter-nav{margin-left:-15px;margin-right:-15px}.chapter-nav a{padding:11px 12px;gap:9px;font-size:.8125rem}.chapter{padding:38px 28px 28px}.opening-grid{grid-template-columns:1fr 1fr;gap:24px}.opening-grid h1{font-size:2.9rem}.signal-note{padding-left:20px}.signal-note .eyebrow{font-size:.75rem;letter-spacing:0}.signal-note h2{font-size:1.35rem}.lead{font-size:1rem}.signal-capabilities{grid-template-columns:1fr;gap:3px;margin-top:13px}.question-shift{grid-template-columns:1fr 25px 1.55fr;gap:16px}.emerging-question p{font-size:1.6rem}.old-question p{font-size:1.3rem}.section-heading{display:block}.section-heading>p{max-width:100%;margin-top:18px}.section-heading>p br{display:none}.instrument-bar{padding:14px 18px}.instrument-label{display:none}.segmented{margin-left:auto;margin-right:auto}.is-learning{height:430px}.workflow{margin-left:10px;margin-right:10px}.is-learning .workflow-node{width:27%;padding:7px 3px}.is-learning .wn2,.is-learning .wn3{left:84%}.is-learning .wn5,.is-learning .wn6{left:16%}.workflow-node strong{font-size:.9375rem}.workflow-node small{font-size:.75rem}.workflow-center strong{font-size:1.15rem}.workflow-center small{font-size:.75rem}.workflow-center .eyebrow{font-size:.75rem;letter-spacing:0}.instrument-foot{align-items:flex-start}.model-note{display:none}.operating-models{grid-template-columns:1fr 1fr 1.32fr}.model-choice{padding:20px 10px}.model-choice>.eyebrow{font-size:.75rem;min-height:36px;align-items:flex-start;letter-spacing:0}.model-choice strong{font-size:2.1rem;letter-spacing:-.06em}.model-choice-caption{font-size:.75rem}.model-select{display:none}.model-detail{grid-template-columns:1fr 1fr;gap:20px}.model-summary{grid-column:1/-1}.model-summary small{margin-top:5px}.independent-thesis{grid-template-columns:1fr;gap:15px}.independent-thesis p br{display:none}.objective-choice{font-size:.8125rem;padding:12px 10px;gap:7px}.objective-workspace{grid-template-columns:1fr}.decision-map{height:500px}.stage-node{width:29%;padding:12px 6px}.stage-label{font-size:.8125rem}.stage-output{font-size:1rem}.objective-center h3{font-size:1.65rem}.decision-detail{padding:22px 0 0}.detail-top{margin-bottom:20px}#stage-detail{min-height:0;margin:0 0 22px}#stage-detail .stage-decision-question{margin-top:13px}.decision-standard{margin-top:0}.trace-button{margin-top:18px}.precision-chapter .chapter-bottom{flex-direction:column;align-items:flex-start}.capability-head{grid-template-columns:1fr 1fr 1.2fr 20px;gap:12px;font-size:.75rem;letter-spacing:0}.capability summary{grid-template-columns:1fr 1fr 1.2fr 20px;gap:12px}.capability-from,.capability-toward{font-size:.875rem}.capability-name{font-size:.9375rem}.capability-detail{grid-template-columns:1fr;gap:8px}.account-economics{grid-template-columns:1fr;gap:28px}.closing h2{font-size:2.7rem}.closing-premise{font-size:1.15rem}}
@media(max-width:700px){:root{--header:106px;--rail:0px}html{scroll-padding-top:var(--header)}.masthead{height:58px;padding:0 17px;gap:10px}.wordmark{font-size:.75rem;gap:9px;letter-spacing:.05em}.wordmark-light{display:none}.mark{width:16px;height:16px;border-top-width:6px;border-bottom-width:6px}.evidence-button{font-size:.75rem;gap:5px}.rail{top:58px;bottom:auto;height:48px;width:100%;padding:0;border-right:0;border-bottom:1px solid var(--line);background:var(--paper);display:block;overflow-x:auto;scrollbar-width:none}.rail::-webkit-scrollbar{display:none}.rail-eyebrow,.rail-bottom{display:none}.chapter-nav{flex-direction:row;margin:0;gap:0;height:47px;min-width:600px;padding:0 8px}.chapter-nav a{padding:10px 10px;border-left:0;border-bottom:2px solid transparent;font-size:.8125rem;gap:6px;white-space:nowrap;align-items:center}.chapter-nav a.active{border-bottom-color:var(--accent);background:none}.chapter-nav a span{font-size:.75rem}.chapter{padding:31px 22px 27px;min-height:0}.chapter>.eyebrow{margin-bottom:22px;line-height:1.6}.edition{display:none}.opening{display:block}.opening-grid{display:block;margin-top:0}.opening-grid h1{font-size:3.05rem;line-height:1.06;letter-spacing:-.06em}.lead{margin-top:20px;max-width:350px;line-height:1.6}.signal-note{border-left:0;border-top:1px solid var(--line);padding:23px 0 0;margin-top:28px}.signal-note h2{font-size:1.5rem;margin:13px 0}.signal-note p{max-width:100%;font-size:.9375rem}.signal-capabilities{grid-template-columns:1fr 1fr;gap:8px 17px;margin:15px 0}.question-shift{grid-template-columns:1fr;gap:16px;padding-top:22px;margin-top:28px}.question-shift .eyebrow{margin-bottom:10px}.old-question p{font-size:1.25rem}.old-question p br{display:none}.shift-arrow{font-size:1.5rem;transform:rotate(90deg);width:20px;margin-left:0;height:23px;line-height:1}.emerging-question p{font-size:1.75rem;line-height:1.25}.chapter-bottom{flex-direction:column;align-items:flex-start;gap:18px;margin-top:27px;min-height:0;padding-bottom:5px}.chapter-bottom>span:empty{display:none}.chapter-bottom p{font-size:.875rem}.next-link{font-size:.875rem}h2{font-size:2.1rem;letter-spacing:-.05em;line-height:1.12}.section-intro{font-size:1rem;margin-top:18px}.section-heading>p{font-size:1rem}.instrument{margin-top:25px}.instrument-bar{padding:12px 8px}.segmented{width:100%;gap:2px}.segmented button{font-size:.8125rem;padding:9px 8px;flex:1;white-space:nowrap}.workflow{height:390px;margin:0 5px}.is-linear .workflow-node{left:50%;width:55%;padding:8px}.is-linear .node-number{display:inline-block;margin:0 9px 0 0}.is-linear .workflow-node strong{display:inline-block}.is-linear .wn1{top:10%}.is-linear .wn2{top:30%}.is-linear .wn3{top:50%}.is-linear .wn4{top:70%}.is-linear .wn5{top:90%}.linear-line{display:none}.is-linear:before{content:"";position:absolute;width:1px;background:var(--line);top:10%;bottom:10%;left:50%}.is-learning{height:520px}.is-learning .workflow-node{width:36%;padding:6px 3px}.is-learning .wn1{top:10%;width:55%}.is-learning .wn2{left:80%;top:34%}.is-learning .wn3{left:80%;top:70%}.is-learning .wn4{top:90%;width:65%}.is-learning .wn5{left:20%;top:70%}.is-learning .wn6{left:20%;top:34%}.is-learning .workflow-node strong{font-size:.875rem}.is-learning .workflow-node small{font-size:.75rem;margin-top:4px}.workflow-center{width:56%;top:50%;max-width:none}.workflow-center strong{font-size:1.15rem;line-height:1.15}.workflow-center .eyebrow{font-size:.75rem;margin-bottom:9px}.workflow-center small{display:none}.instrument-foot{padding:15px}.instrument-foot p{font-size:.8125rem}.operating-models{margin-top:25px;grid-template-columns:1fr}.model-choice,.model-choice:first-child{display:grid;grid-template-columns:1fr 1.2fr;align-items:center;gap:0 15px;padding:17px 5px;border-right:0;border-bottom:1px solid var(--line)}.model-choice:last-child{border-bottom:0}.model-choice.selected:after{left:-1px;top:0;bottom:0;height:auto;width:3px;right:auto}.model-choice.selected{background:#eef2fd;padding-left:12px}.model-choice>.eyebrow{min-height:0;font-size:.75rem;grid-column:1;grid-row:1;letter-spacing:.025em}.model-choice strong{font-size:2rem;grid-column:2;grid-row:1/3;margin:0;justify-self:end}.model-choice-caption{grid-column:1;grid-row:2;margin-top:3px;font-size:.75rem}.model-detail{grid-template-columns:1fr;gap:19px;padding-top:24px}.model-summary{font-size:1.1rem;grid-column:auto}.model-summary small{margin-top:10px}.model-details-column li{font-size:.9375rem;margin-bottom:9px}.independent-thesis{margin-top:23px;padding-top:23px}.independent-thesis p{font-size:1.5rem}.precision-context{font-size:.9375rem;margin-top:18px}.system-premise{font-size:1rem;margin-top:18px;margin-bottom:22px}.objective-choices{grid-template-columns:repeat(2,1fr)}.objective-choice{font-size:.8125rem;min-height:64px;padding:10px;gap:8px}.objective-num{align-self:flex-start;margin-top:2px}.objective-workspace{margin-top:17px;gap:22px}.decision-map{height:440px;margin-left:-9px;margin-right:-9px}.stage-node{width:32%;padding:8px 3px;min-height:69px}.stage-label{font-size:.75rem;line-height:1.3;letter-spacing:-.04em}.stage-output{font-size:.8125rem;line-height:1.35;margin-top:5px;padding:0 1px}.objective-center{width:36%}.objective-center>.eyebrow{font-size:.75rem;letter-spacing:-.04em;line-height:1.35}.objective-center h3{font-size:1.125rem;line-height:1.2;margin:10px 0}.center-caption{font-size:.75rem;line-height:1.35}.detail-top .eyebrow{font-size:.75rem}.detail-top{margin-bottom:16px}#stage-detail h3{font-size:1.4rem;margin-bottom:12px}#stage-detail p{font-size:.9375rem}#stage-detail .stage-decision-question{font-size:.9375rem}.decision-standard p{font-size:.875rem}.next-decision{margin-top:23px;padding:17px 15px;gap:13px;align-items:flex-start}.next-decision p{font-size:.9375rem}.return-mark{font-size:1.5rem;line-height:1.2;margin-top:2px}.next-decision .eyebrow{font-size:.75rem;letter-spacing:.03em}.capability-head{display:none}.capabilities{margin-top:26px}.capability summary{grid-template-columns:1fr 25px;gap:7px;padding:19px 0}.capability-name{grid-column:1;grid-row:1;font-size:1rem}.capability-from{grid-column:1;grid-row:2;font-size:.875rem}.capability-from:before{content:"From: ";color:var(--faint)}.capability-toward{grid-column:1;grid-row:3;font-size:.9375rem}.capability-toward:before{content:"Toward: ";color:var(--faint)}.capability-plus{grid-column:2;grid-row:1/4}.capability-detail{padding-bottom:20px}.capability-detail p{font-size:.9375rem}.account-economics{margin-top:29px;padding-top:25px;gap:24px}.economics-context h3{font-size:1.35rem}.closing{padding-top:39px;min-height:calc(100svh - var(--header))}.closing-premise{font-size:1.1rem}.closing-bridge{font-size:.9375rem;line-height:1.65;margin-top:17px}.closing-rule{margin:27px 0}.closing h2{font-size:2.5rem;line-height:1.18;letter-spacing:-.055em}.closing-tools{flex-direction:column;align-items:flex-start;gap:17px;margin-top:28px}.colophon{padding-top:23px;margin-top:28px;font-size:.75rem}dialog{width:calc(100vw - 24px);max-height:calc(100svh - 28px);padding:20px}dialog h2{font-size:1.7rem}.source-entry{gap:14px;padding:20px 0}.source-entry p{font-size:.875rem}.source-entry .eyebrow{font-size:.75rem;letter-spacing:0}.dialog-intro{font-size:.9375rem}}
@media(min-width:1001px){.objective-choices{position:sticky;top:calc(var(--header) + 10px);z-index:12;background:#f9fafc;box-shadow:0 0 0 10px #f9fafc}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,*:before,*:after{animation-duration:.001ms!important;animation-iteration-count:1!important;transition-duration:.001ms!important}.tracing .orbit{stroke-dasharray:3 5}}
@media print{.masthead,.rail,.chapter-bottom,.closing-tools,.trace-button{display:none}main{margin:0;padding:0}.chapter{padding:24px 0;min-height:0;break-inside:avoid}.objective-workspace{grid-template-columns:1.3fr 1fr}.decision-map{height:420px}body{background:white}.chapter:before{content:none}}

/* Business-focused conclusion */
.opportunity-chapter{padding-top:48px}.pepsico-return{display:grid;grid-template-columns:1fr 2.1fr;gap:15px 30px;border-top:1px solid var(--line);border-bottom:1px solid var(--line);padding:24px 0;margin:30px 0}.pepsico-return>.eyebrow{align-self:start;color:var(--accent);justify-content:start}.pepsico-return p{font-size:1rem;color:var(--muted);line-height:1.65}.pepsico-return .return-lesson{grid-column:2;color:var(--ink)}.opportunity-benefits{display:grid;grid-template-columns:repeat(3,1fr);gap:25px;margin:28px 0 32px}.opportunity-benefits>div+div{border-left:1px solid var(--line);padding-left:25px}.opportunity-benefits .eyebrow{font-size:.75rem;min-height:36px;align-items:flex-start;letter-spacing:.025em}.opportunity-benefits h3{font-size:1.3rem;line-height:1.25;margin:8px 0 15px}.opportunity-benefits p{font-size:1rem;line-height:1.65;color:var(--muted)}.precision-opportunity{display:grid;grid-template-columns:1fr 2.1fr;gap:30px;border-top:1px solid var(--line);padding-top:25px}.precision-opportunity>.eyebrow{align-self:start;justify-content:start;color:var(--accent)}.precision-opportunity h3{font-size:1.5rem;line-height:1.3}.precision-opportunity p{font-size:1rem;line-height:1.65;color:var(--muted);margin-top:15px}.opportunity-chapter .opportunity-question{font-size:clamp(1.7rem,2.6vw,2.65rem);line-height:1.25;letter-spacing:-.04em;border-top:1px solid var(--line);padding-top:30px;margin-top:30px;max-width:1000px}.opportunity-chapter .closing-tools{margin-top:25px}
@media(max-width:1000px){.pepsico-return,.precision-opportunity{grid-template-columns:1fr;gap:15px}.pepsico-return .return-lesson{grid-column:1}.opportunity-benefits{grid-template-columns:1fr;gap:23px}.opportunity-benefits>div+div{border-left:0;border-top:1px solid var(--line);padding:22px 0 0}.opportunity-benefits .eyebrow{min-height:0}.opportunity-benefits h3{margin:10px 0}.precision-opportunity h3{font-size:1.4rem}}@media(max-width:700px){.chapter-nav{min-width:0;width:max-content;min-width:100%}.chapter-nav a{flex:1;justify-content:center;padding:10px 9px}.opportunity-chapter{padding-top:31px}.opportunity-chapter h2 br{display:none}.pepsico-return{margin-top:25px}.opportunity-chapter .opportunity-question{font-size:1.8rem}}