/* Editorial information design. Shared Arial, white surfaces and chapter rhythm. */
.design-section{--design-muted:#656565;--design-line:#d4d4d4;padding:80px 0;scroll-margin-top:32px}
.design-section *{min-width:0}
.design-heading{max-width:850px;margin-bottom:44px;scroll-margin-top:32px}
.design-heading .eyebrow{font-size:12px;margin:0 0 24px}
.design-heading h2,.design-heading h3{font-size:clamp(34px,4.5vw,68px);line-height:1.06;letter-spacing:-.05em;font-weight:400;margin:0}
.design-heading>p:not(.eyebrow){font-size:17px;line-height:1.65;max-width:690px;margin:28px 0 0}
.design-caption,.design-section figcaption{font-size:13px;line-height:1.6;color:var(--design-muted);max-width:820px;margin:24px 0 0}
.design-section :is(summary,a):focus-visible{outline:2px solid #141414;outline-offset:4px}
.design-section summary{cursor:pointer;list-style:none}
.design-section summary::-webkit-details-marker{display:none}
.design-section summary::marker{content:""}
.disclosure-mark{display:block;position:relative;flex:0 0 14px;width:14px;height:14px;margin:3px 0}
.disclosure-mark::before,.disclosure-mark::after{content:"";position:absolute;background:currentColor;left:1px;right:1px;top:6px;height:1px}
.disclosure-mark::after{transform:rotate(90deg)}
details[open]>summary .disclosure-mark::after{transform:none}
.visually-hidden{position:absolute!important;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip-path:inset(50%);white-space:nowrap;border:0}
.design-detail{border-top:1px solid var(--design-line);margin-top:36px}
.design-detail>summary{display:flex;justify-content:space-between;gap:24px;align-items:center;min-height:64px;padding:16px 0;font-size:18px;line-height:1.4}
.detail-copy{max-width:740px;padding:8px 0 24px}
.detail-copy p,.design-prose p,.practice-grid p,.module-purpose{font-size:16px;line-height:1.7;margin:0 0 22px}
.detail-copy p:last-child,.design-prose p:last-child{margin-bottom:0}
@media(hover:hover) and (pointer:fine){.design-section summary:hover{color:#555}}

/* The full 3 × 4 relationship is visible before opening any example. */
.infrastructure-matrix{width:100%;table-layout:fixed;border-collapse:collapse;font-size:15px;line-height:1.55}
.infrastructure-matrix caption{text-align:left;font-size:13px;line-height:1.5;color:var(--design-muted);padding:0 0 24px}
.infrastructure-matrix :is(th,td){text-align:left;vertical-align:top;padding:20px 18px 22px 0;border-top:1px solid var(--design-line);font-weight:400}
.infrastructure-matrix th:first-child{width:20%}
.infrastructure-matrix thead th{border-top:1px solid #141414;font-size:16px}
.infrastructure-matrix th small{display:block;font-size:12px;line-height:1.5;color:var(--design-muted);margin-top:9px}
.infrastructure-matrix tbody th>span{font-size:21px;letter-spacing:-.025em}
.infrastructure-matrix td{padding-left:14px;padding-right:14px}
.infrastructure-matrix td:last-child{padding-right:0}
.infrastructure-matrix td summary{display:flex;align-items:flex-start;justify-content:space-between;gap:12px;min-height:88px}
.matrix-cell-copy{flex:1}
.matrix-cell-label{display:none}
.infrastructure-matrix td details>p{font-size:14px;line-height:1.65;margin:18px 0 0;color:var(--design-muted)}

/* Reciprocal influences, not a hierarchy or a claim of universal causation. */
.reciprocal-system{margin:38px auto 0;max-width:1000px;position:relative}
.reciprocal-connections{position:absolute;inset:0 0 auto;width:100%;height:440px;pointer-events:none}
.reciprocal-connections>path{fill:none;stroke:#aaa;stroke-width:1;vector-effect:non-scaling-stroke}
.reciprocal-connections marker path{fill:none;stroke:#777;stroke-width:1}
.reciprocal-nodes{position:relative;list-style:none;padding:0;margin:0;height:440px}
.reciprocal-nodes li{position:absolute;left:20%;top:22.22%;transform:translate(-50%,-50%);background:#fff;width:35%;max-width:290px;padding:20px}
.reciprocal-nodes li:nth-child(2){left:80%}
.reciprocal-nodes li:nth-child(3){left:80%;top:77.78%}
.reciprocal-nodes li:nth-child(4){top:77.78%}
.reciprocal-nodes h3{font-size:26px;line-height:1.12;letter-spacing:-.035em;font-weight:400;margin:0 0 13px}
.reciprocal-nodes p{font-size:15px;line-height:1.5;margin:0;color:var(--design-muted)}
.reciprocal-system figcaption{margin:24px auto 0;text-align:center;max-width:720px}
.design-editorial{display:grid;grid-template-columns:1fr 1fr;gap:12%}
.design-editorial .design-heading{margin:0}
.design-prose{max-width:600px}

/* Every step exposes its purpose; input/method/output stay one disclosure away. */
.learning-system{margin:0}
.learning-loop{display:grid;grid-template-columns:repeat(5,minmax(0,1fr));list-style:none;padding:0;margin:0;gap:28px}
.learning-loop>li{position:relative;border-top:1px solid #141414;padding-top:18px}
.learning-loop>li:not(:last-child)::after{content:"→";position:absolute;right:-23px;top:40px;font-size:17px;color:var(--design-muted)}
.learning-loop>li:first-child::after{content:"↔"}
.learning-loop summary{position:relative;display:flex;flex-direction:column;align-items:flex-start;min-height:182px;padding-bottom:12px}
.learning-loop summary .eyebrow{font-size:12px;margin:0 0 24px;color:var(--design-muted)}
.learning-loop strong{font-weight:400;font-size:clamp(18px,1.8vw,26px);letter-spacing:-.03em;line-height:1.2}
.stage-purpose{font-size:14px;line-height:1.6;color:var(--design-muted);margin-top:16px}
.learning-loop .disclosure-mark{margin-top:20px}
.learning-loop dl{font-size:14px;line-height:1.6;margin:8px 0 26px}
.learning-loop dt{margin-top:20px;color:#141414}
.learning-loop dd{margin:7px 0 0;color:var(--design-muted)}
.learning-return{display:flex;gap:20px;align-items:center;justify-content:space-between;border-bottom:1px solid #aaa;padding:16px 0;font-size:13px;color:var(--design-muted)}
.learning-return span:not(:nth-child(2)){font-size:24px;line-height:1}
.ck-spaces{display:grid;grid-template-columns:1fr 1fr;gap:36px;margin:28px 0}
.ck-spaces h3{font-size:22px;font-weight:400;letter-spacing:-.025em;margin:0 0 16px}
.quality-section{margin-top:54px}
.quality-section>h3{font-size:28px;font-weight:400;line-height:1.2;letter-spacing:-.035em;margin:0 0 28px}
.quality-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:40px;margin:0}
.quality-grid dt{font-size:17px;line-height:1.4}
.quality-grid dd{font-size:15px;line-height:1.65;margin:14px 0 0;color:var(--design-muted)}

.practice-grid{display:grid;grid-template-columns:1fr 1fr;gap:12%;margin-top:50px}
.practice-grid .eyebrow{font-size:12px;color:var(--design-muted);margin:0 0 20px}
.practice-grid h3{font-size:34px;font-weight:400;line-height:1.1;letter-spacing:-.04em;margin:0 0 28px}
.design-section .brand-art{padding:70px 0}
.design-section .brand-art img{max-width:520px;width:60%;height:auto}
.second-nature{margin-top:36px;scroll-margin-top:40px}
.second-nature .design-heading{margin-bottom:20px}
.os-modules{list-style:none;padding:0;margin:40px 0}
.os-modules>li{border-top:1px solid var(--design-line)}
.os-modules summary{display:flex;align-items:center;gap:32px;min-height:90px;padding:20px 0}
.module-name{font-size:30px;line-height:1.2;letter-spacing:-.035em;flex:0 0 32%}
.module-role{font-size:16px;line-height:1.5;flex:1;color:var(--design-muted)}
.module-purpose{max-width:740px}
.evidence-system h4{font-size:20px;line-height:1.4;font-weight:400;letter-spacing:-.025em;margin:0 0 24px}
.evidence-system dl{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:30px;margin:0}
.evidence-system dt{font-size:15px;line-height:1.4}
.evidence-system dd{font-size:14px;line-height:1.6;color:var(--design-muted);margin:8px 0 0}
.design-section>.text-link{margin-top:28px}

.case-system{margin:0}
.case-system ol{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));list-style:none;padding:0;margin:0;gap:36px}
.case-system li{position:relative;border-top:1px solid #141414;padding:20px 0 0;scroll-margin-top:80px}
.case-system li:not(:last-child)::after{content:"↔";position:absolute;right:-28px;top:21px;font-size:18px;color:var(--design-muted)}
.case-system li .eyebrow{font-size:12px;margin:0}
.case-system li p{font-size:18px;line-height:1.5;margin:24px 0}
.case-return{font-size:22px;line-height:1;border-bottom:1px solid #aaa;padding-bottom:8px;text-align:center;color:var(--design-muted)}
.rebiaa-system{padding:60px 0 85px}

/* Preserve the established relationship map while giving its three scales names. */
.system-experience .system-intro h1{font-size:clamp(62px,7vw,112px)}
.system-experience .system-intro>p{font-size:21px;line-height:1.5;max-width:430px}
.system-experience .system-node[data-node=purpose] h2{font-size:28px;line-height:1.05;max-width:260px;padding:6px}
.system-experience .system-node[data-node=meaning]{width:235px}
.system-experience .system-context{max-width:300px}
.system-method .origin-trajectory{font-size:13px;line-height:1.8;color:#656565;margin-top:24px}
.research-chapters{display:flex;gap:12px 30px;flex-wrap:wrap;margin:0 0 36px;font-size:13px;line-height:1.5}
.research-chapters a{padding:12px 0;border-bottom:1px solid #aaa;min-height:44px}
@media(min-width:1321px){
 .system-experience .system-map{width:calc(100% - 120px);margin-left:-10px}
 .system-experience .system-intro>p{max-width:360px;font-size:20px}
 .system-experience .system-node[data-node=resources]{width:200px}
 .system-experience .system-node[data-node=capabilities],.system-experience .system-node[data-node=impact]{width:230px}
 .system-experience .system-node h3{font-size:22px}
 .system-experience .system-node-control [data-node-label]{overflow-wrap:normal}
}

@media(max-width:1320px){.system-experience .system-intro h1{font-size:clamp(48px,7vw,80px)}.system-experience .system-intro>p{max-width:650px;font-size:19px}.system-experience .system-node[data-node=meaning]{width:auto}}
@media(max-width:1000px){
 .learning-loop{grid-template-columns:1fr;gap:0}
 .learning-loop>li{padding:0}
 .learning-loop>li:not(:last-child)::after{content:none}
 .learning-loop summary{display:grid;grid-template-columns:24px minmax(140px,1fr) 1.7fr 14px;gap:22px;align-items:center;min-height:100px;padding:20px 0}
 .learning-loop summary .eyebrow,.stage-purpose,.learning-loop .disclosure-mark{margin:0}
 .learning-loop strong{font-size:24px}
 .learning-loop dl{padding-left:46px;max-width:660px}
 .learning-loop dt{margin-top:12px}
 .design-editorial,.practice-grid{gap:7%}
}
@media(max-width:900px){
 .infrastructure-matrix{display:block}
 .infrastructure-matrix caption{display:block}
 .infrastructure-matrix thead{position:absolute;width:1px;height:1px;overflow:hidden;clip-path:inset(50%)}
 .infrastructure-matrix tbody{display:block}
 .infrastructure-matrix tbody tr{display:grid;grid-template-columns:1fr 1fr;gap:0 32px;margin-top:30px}
 .infrastructure-matrix tbody th{display:block;grid-column:1/-1;width:auto;padding:18px 0 20px;border-color:#141414}
 .infrastructure-matrix tbody tr>th:first-child{width:100%}
 .infrastructure-matrix th small{margin-top:5px}
 .infrastructure-matrix td{display:block;padding:18px 0}
 .infrastructure-matrix td summary{flex-wrap:wrap;min-height:70px;gap:8px 12px}
 .matrix-cell-label{display:block;flex:0 0 calc(100% - 28px);font-size:15px;color:#141414;order:0}
 .matrix-cell-copy{flex:1 0 100%;font-size:15px;color:var(--design-muted);order:2}
 .infrastructure-matrix .disclosure-mark{order:1}
 .reciprocal-nodes li{width:40%;padding:14px}
 .reciprocal-nodes h3{font-size:24px}
 .case-system ol{grid-template-columns:1fr 1fr;gap:32px}
 .case-system li:not(:last-child)::after{content:none}
}
@media(max-width:650px){
 .design-section{padding:50px 0}
 .design-heading{margin-bottom:30px}
 .design-heading .eyebrow{font-size:11px;margin-bottom:20px}
 .design-heading h2,.design-heading h3{font-size:clamp(32px,8.5vw,48px)}
 .design-heading>p:not(.eyebrow){font-size:15px;line-height:1.7;margin-top:24px}
 .design-detail>summary{font-size:17px;min-height:64px}
 .detail-copy p,.design-prose p,.practice-grid p,.module-purpose{font-size:15px}
 .design-caption,.design-section figcaption{font-size:12px;text-align:left}
 .design-editorial,.practice-grid{grid-template-columns:1fr;gap:32px}
 .practice-grid{margin-top:32px}
 .reciprocal-connections{display:none}
 .reciprocal-nodes{height:auto;display:grid;gap:32px;padding-left:28px}
 .reciprocal-nodes li,.reciprocal-nodes li:nth-child(n){position:relative;left:auto;top:auto;transform:none;width:100%;max-width:none;padding:0}
 .reciprocal-nodes li:not(:last-child)::before{content:"";position:absolute;top:15px;bottom:-45px;left:-22px;border-left:1px solid #aaa}
 .reciprocal-nodes li::after{content:"↕";position:absolute;left:-29px;top:12px;background:#fff;font-size:18px;color:var(--design-muted)}
 .reciprocal-nodes h3{font-size:24px}
 .reciprocal-nodes p{font-size:15px}
 .learning-loop summary{grid-template-columns:20px minmax(0,1fr) 14px;gap:12px;min-height:100px}
 .learning-loop summary .eyebrow{grid-row:1}
 .learning-loop strong{grid-column:2;font-size:24px}
 .learning-loop .stage-purpose{grid-row:2;grid-column:2;font-size:14px}
 .learning-loop .disclosure-mark{grid-row:1;grid-column:3}
 .learning-loop dl{padding-left:32px;font-size:14px}
 .learning-return{gap:16px;align-items:start}
 .ck-spaces,.quality-grid{grid-template-columns:1fr;gap:24px}
 .quality-section{margin-top:40px}
 .quality-grid dd{margin-top:9px}
 .practice-grid h3{font-size:30px;margin-bottom:24px}
 .design-section .brand-art{padding:48px 0}
 .design-section .brand-art img{width:80%}
 .os-modules summary{flex-wrap:wrap;gap:10px 18px;min-height:96px}
 .module-name{font-size:28px;flex:1}
 .module-role{flex:1 0 100%;order:2;font-size:14px}
 .evidence-system dl{grid-template-columns:1fr 1fr;gap:24px}
 .research-chapters{gap:0 24px}
 .case-system li p{font-size:16px;margin:18px 0}
}
@media(max-width:480px){
 .infrastructure-matrix tbody tr{grid-template-columns:1fr;gap:0}
 .infrastructure-matrix td summary{min-height:62px}
 .system-experience .system-node:not([data-node=purpose]){display:block}
 .system-experience .system-node ul{margin-top:14px}
 .system-experience .system-index{gap:8px 18px}
 .system-experience .system-next{font-size:21px}
 .case-system ol{grid-template-columns:1fr;gap:18px}
 .case-system li p{margin-bottom:4px}
}
@media(prefers-reduced-motion:reduce){.design-section *{animation:none!important;transition:none!important;scroll-behavior:auto!important}}