/* Editorial learning system: branching navigation and useful, legible diagrams. */
html:has(.article-layout){scroll-padding-top:0}
.guide-scroll-note{display:none}
.guide-visual .sr-only{position:absolute!important;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}
.article-layout{grid-template-columns:minmax(220px,25%) minmax(0,1fr);gap:8%;align-items:start}
.article-toc{top:112px;max-height:calc(100svh - 140px);overflow:auto;overscroll-behavior:contain;padding-top:18px;padding-right:8px;border-color:#b4b7b8;scrollbar-width:thin}
.guide-reading{display:flex;justify-content:space-between;gap:15px;font-size:9px;letter-spacing:.04em;color:#777;margin-bottom:12px}
.guide-progress{height:2px;background:#e5e6e6;margin-bottom:23px;overflow:hidden}
.guide-progress>span{display:block;height:100%;width:100%;background:#17191a;transform:scaleX(0);transform-origin:left;transition:transform .15s linear}
.toc-tree-shell>summary,.toc-branch>details>summary{display:flex;align-items:center;gap:10px;cursor:pointer;list-style:none}
.toc-tree-shell>summary::-webkit-details-marker,.toc-branch>details>summary::-webkit-details-marker{display:none}
.toc-tree-shell>summary{font-size:10px;text-transform:uppercase;letter-spacing:.12em;font-weight:500;justify-content:space-between;margin-bottom:20px}
.toc-expand{font-size:18px;line-height:1;transition:transform .2s}.toc-tree-shell[open] .toc-expand{transform:rotate(45deg)}
.guide-tree ol{list-style:none;margin:0;padding:0}.guide-tree>.guide-tree{} .guide-tree>.toc-branch{margin:0}
.toc-branch{margin:0 0 21px}.toc-branch>details>summary{font-size:11px;line-height:1.6;font-weight:500;color:#3a3e3f;padding:0 0 10px}
.toc-branch>details>summary:after{content:'+';margin-left:auto;color:#999;font-size:13px}.toc-branch>details[open]>summary:after{content:'−'}
.toc-branch-index{font-size:8px;color:#999;font-weight:400;letter-spacing:.03em}
.toc-branch>details>ol{border-left:1px solid #dadcdd;margin-left:7px;padding-left:17px}
.guide-tree li{position:relative}.toc-branch>details>ol>li:before,.toc-twigs>li:before{content:'';position:absolute;left:-18px;top:16px;width:12px;border-top:1px solid #dadcdd}
.guide-tree a{position:relative;display:block;font-size:10px;line-height:1.65;padding:8px 0;color:#777;text-decoration:none;border:0;transition:color .15s}
.guide-tree a:hover,.guide-tree a[aria-current=location]{color:#111}
.guide-tree .toc-twigs{margin:1px 0 5px 5px;border-left:1px solid #e2e3e3;padding-left:15px}.toc-twigs a{font-size:9px;color:#8b9092;padding:6px 0;line-height:1.7}.toc-twigs>li:before{left:-16px;width:10px;top:14px}
.article-toc .toc-estimate{font-size:10px;margin-top:6px;line-height:1.7}.toc-branch.has-current>details>summary{color:#111}
.guide-takeaway{border-top:1px solid #17191a;border-bottom:1px solid #d4d7d8;padding:23px 0 26px;margin:0 0 55px}
.prose .guide-takeaway .eyebrow{font-size:9px;letter-spacing:.11em;line-height:1.5;color:#6b7071;margin:0 0 12px}.prose .guide-takeaway p:last-child{font-size:22px;line-height:1.5;color:#292d2e;margin:0;max-width:720px}
.article-layout .prose-section{scroll-margin-top:115px;margin-bottom:60px}.article-layout .prose-section h2{max-width:730px}
.guide-visual{margin:35px 0 42px;padding:28px 0 0;border-top:1px solid #242728;scroll-margin-top:115px;color:#22272a;min-width:0}
.guide-visual-label{font-size:8px;letter-spacing:.13em;color:#757b7d;margin-bottom:12px}
.prose .guide-visual h3{font-size:25px;line-height:1.25;margin:0 0 28px;color:#1c2022;letter-spacing:-.025em;max-width:620px}
.prose .guide-visual figcaption{font-size:10px;line-height:1.8;color:#797f81;margin-top:21px;max-width:650px}
.guide-table-wrap{max-width:100%;min-width:0}.guide-matrix,.guide-rhythm{border-collapse:collapse;width:100%;table-layout:fixed;font-size:12px;line-height:1.7}
.guide-matrix th,.guide-matrix td{border-bottom:1px solid #d6d9da;text-align:left;vertical-align:top;padding:15px 13px 15px 0;overflow-wrap:anywhere}
.guide-matrix thead th{font-size:9px;text-transform:uppercase;letter-spacing:.055em;color:#62696c;font-weight:500;border-top:1px solid #d6d9da;background:#f6f7f7;padding-left:12px}
.guide-matrix tbody th{font-size:12px;font-weight:500;color:#242a2d;width:24%}.guide-matrix th:first-child{width:24%}.guide-matrix td{color:#687074}.guide-matrix th:last-child,.guide-matrix td:last-child{padding-right:0}
.guide-rhythm th,.guide-rhythm td{border-bottom:1px solid #d6d9da;padding:18px 4px;text-align:center;font-size:10px}.guide-rhythm th:first-child{text-align:left;width:30%;font-weight:500}.guide-rhythm thead th{font-size:8px;color:#7c8386;letter-spacing:.04em;font-weight:400}
.rhythm-mark,.rhythm-key i{display:inline-block;height:10px;width:10px;border-radius:50%;border:1px solid #9da2a4;vertical-align:middle}.has-visit{background:#1c2224;border-color:#1c2224!important}.between-visits{background:transparent}.rhythm-key{display:flex;flex-wrap:wrap;gap:20px;font-size:9px;color:#757c7f;margin-top:17px}.rhythm-key i{height:7px;width:7px;margin-right:6px}
.prose .rhythm-notes{list-style:none;padding:0;margin:25px 0 0}.prose .rhythm-notes li{font-size:11px;line-height:1.8;margin-bottom:7px;color:#727b7e}.rhythm-notes strong{color:#3c4448;font-weight:500}
.prose .guide-sequence{list-style:none;padding:0;margin:0}.prose .guide-sequence>li{position:relative;margin:0;padding:0 0 30px;display:grid;grid-template-columns:34px 1fr;gap:20px}.guide-sequence>li:before{content:'';position:absolute;left:16px;top:32px;bottom:0;border-left:1px solid #c9ced0}.guide-sequence>li:last-child:before{display:none}.sequence-node{display:flex;align-items:center;justify-content:center;border:1px solid #aeb6b9;border-radius:50%;width:33px;height:33px;font-size:9px;color:#4f5a5f;background:#fff;position:relative;z-index:1}.guide-sequence strong{display:block;font-size:14px;line-height:1.7;font-weight:500;color:#252c2f}.prose .guide-sequence p{font-size:12px;line-height:1.8;margin:5px 0 0;color:#717a7e}
.prose .guide-timeline{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:18px}.prose .guide-timeline>li{display:block;padding:0}.guide-timeline .sequence-node{margin-bottom:16px}.guide-timeline>li:before{top:16px;left:33px;right:-18px;bottom:auto;border-left:0;border-top:1px solid #c9ced0}.guide-timeline strong{font-size:12px}.prose .guide-timeline p{font-size:11px}
.guide-zones{display:grid;grid-template-columns:1fr 1fr;gap:12px;border:1px solid #a4adb1;padding:12px;position:relative;background:linear-gradient(90deg,#f9fafb,#fff)}
.guide-zone{position:relative;border:1px solid #d1d7d9;padding:25px 17px;min-height:160px}.zone-coordinate{display:block;font-size:9px;letter-spacing:.06em;color:#899397;margin-bottom:21px}.guide-zone strong{font-size:14px;font-weight:500;line-height:1.5}.prose .guide-zone p{font-size:11px;line-height:1.75;margin:9px 0 0;color:#727d82}
.guide-factor-center{border:1px solid #58656c;padding:17px;text-align:center;font-size:14px;margin-bottom:28px;position:relative}.guide-factor-center:after{content:'';position:absolute;height:28px;bottom:-29px;left:50%;border-left:1px solid #c9d0d3}
.guide-factors{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:0;border-top:1px solid #c9d0d3}.guide-factors>div{padding:20px 15px 20px 0;border-bottom:1px solid #d6dbde}.guide-factors>div>span{display:block;font-size:8px;color:#8a969c;margin-bottom:9px}.guide-factors strong{display:block;font-size:12px;font-weight:500;line-height:1.6}.prose .guide-factors p{font-size:11px;line-height:1.75;color:#737e84;margin:8px 0 0}
.prose .decision-start{border:1px solid #76858d;padding:19px;text-align:center;font-size:14px;line-height:1.7;color:#28343b;margin:0 auto 28px;max-width:450px;position:relative}.decision-start:after{content:'';position:absolute;bottom:-29px;height:28px;border-left:1px solid #bac5cb;left:50%}.decision-branches{position:relative;display:grid;grid-template-columns:1fr 1fr;gap:25px;border-top:1px solid #bac5cb;padding-top:25px}.decision-branches>div{padding:20px;background:#f5f7f8;position:relative}.decision-branches>div:before{content:'';position:absolute;left:50%;top:-26px;height:25px;border-left:1px solid #bac5cb}.decision-branches strong{display:block;font-size:13px;font-weight:500;line-height:1.7}.prose .decision-branches p{font-size:12px;line-height:1.8;margin:12px 0 0;color:#6f7c83}
.learning-directory{display:grid;grid-template-columns:1fr 1.15fr;gap:12%;padding:0 0 100px;margin-bottom:45px;border-bottom:1px solid #d5d8da}.learning-directory-intro{padding-top:12px}.learning-directory h2{font-size:clamp(36px,4.4vw,62px);line-height:1.06}.learning-directory-intro>p:last-child{font-size:13px;line-height:1.9;color:#72787b;max-width:330px;margin-top:28px}
.learning-directory-tree>details{border-top:1px solid #b5bdc1;padding:20px 0 28px}.learning-directory-tree>details:last-child{border-bottom:1px solid #b5bdc1}.learning-directory-tree summary{display:flex;align-items:center;gap:18px;list-style:none;cursor:pointer}.learning-directory-tree summary::-webkit-details-marker{display:none}.learning-directory-tree summary:after{content:'+';margin-left:auto;font-size:20px;color:#68757c}.learning-directory-tree details[open]>summary:after{content:'−'}.learning-directory-tree summary>span{font-size:9px;color:#919b9f}.learning-directory-tree strong{font-size:20px;font-weight:400;letter-spacing:-.025em}.learning-directory-tree details>p{font-size:11px;color:#818b90;line-height:1.8;margin:9px 0 18px 35px}.learning-directory-tree ul{list-style:none;border-left:1px solid #d3d9dc;padding:0 0 0 22px;margin:0 0 0 10px}.learning-directory-tree li{position:relative}.learning-directory-tree li:before{content:'';position:absolute;left:-23px;top:24px;width:14px;border-top:1px solid #d3d9dc}.learning-directory-tree a{display:block;font-size:13px;line-height:1.7;padding:12px 0;color:#38454d}.learning-directory-tree a:hover{text-decoration:underline;text-underline-offset:4px}.learning-directory-tree a>span{display:block;font-size:9px;color:#89949a;margin-top:5px;letter-spacing:.025em}
@media(max-width:1100px){.article-layout{grid-template-columns:26% minmax(0,1fr);gap:6%}.guide-tree a{font-size:9px}.toc-branch>details>summary{font-size:10px}.guide-tree .toc-twigs a{font-size:8px}.guide-visual h3{font-size:23px}.prose .guide-timeline{grid-template-columns:1fr 1fr;gap:25px}.guide-timeline>li:before{display:none}.guide-matrix th,.guide-matrix td{font-size:11px}.learning-directory{gap:7%}.learning-directory-tree strong{font-size:18px}}
@media(max-width:760px){.article-layout{display:block}.article-toc{position:static;max-height:none;overflow:visible;padding:18px 0 0;margin-bottom:38px;border-color:#bdc5c9}.guide-reading{font-size:8px}.guide-progress{margin-bottom:18px}.toc-tree-shell>summary{font-size:10px;padding:2px 0 15px;margin-bottom:0}.guide-tree{padding:8px 0 10px}.toc-branch{margin-bottom:15px}.toc-branch>details>summary{font-size:12px;padding-bottom:10px}.guide-tree a{font-size:11px;line-height:1.7;padding:10px 0}.guide-tree .toc-twigs a{font-size:10px;padding:8px 0}.toc-branch>details>ol>li:before{top:19px}.toc-twigs>li:before{top:17px}.article-toc .toc-estimate{font-size:10px;padding:12px 0;border-top:1px solid #e0e3e4;margin-top:0}.guide-takeaway{padding:20px 0 23px;margin-bottom:36px}.prose .guide-takeaway p:last-child{font-size:20px;line-height:1.55}.article-layout .prose-section{scroll-margin-top:96px;margin-bottom:43px}.guide-visual{margin:28px 0 35px;padding-top:22px;scroll-margin-top:95px}.prose .guide-visual h3{font-size:23px;line-height:1.3;margin-bottom:23px}.guide-visual-label{font-size:8px}.prose .guide-visual figcaption{font-size:10px;line-height:1.8;margin-top:18px}.guide-matrix th,.guide-matrix td{font-size:10px;line-height:1.8;padding:13px 10px 13px 0}.guide-matrix thead th{font-size:8px;letter-spacing:.025em;padding-left:7px}.guide-matrix th:first-child{width:25%}.guide-rhythm th,.guide-rhythm td{font-size:9px;padding:16px 1px}.guide-rhythm th:first-child{width:34%}.guide-rhythm thead th{font-size:7px}.rhythm-mark{width:9px;height:9px}.rhythm-key{font-size:8px;gap:14px}.prose .rhythm-notes li{font-size:11px}.prose .guide-sequence>li{grid-template-columns:31px 1fr;gap:17px;padding-bottom:24px}.sequence-node{width:31px;height:31px;font-size:8px}.guide-sequence>li:before{left:15px;top:30px}.guide-sequence strong{font-size:13px}.prose .guide-sequence p{font-size:12px}.prose .guide-timeline{display:block}.prose .guide-timeline>li{display:grid}.guide-timeline>li:before{display:block;top:30px;left:15px;right:auto;bottom:0;border-top:0;border-left:1px solid #c9ced0}.guide-timeline>li:last-child:before{display:none}.guide-timeline .sequence-node{margin:0}.guide-zones{gap:8px;padding:8px}.guide-zone{padding:17px 12px;min-height:180px}.zone-coordinate{margin-bottom:17px;font-size:8px}.guide-zone strong{font-size:12px}.prose .guide-zone p{font-size:10px;line-height:1.8}.guide-factors{grid-template-columns:1fr 1fr}.guide-factors>div{padding:18px 13px 18px 0}.guide-factor-center{font-size:13px}.guide-factors strong{font-size:12px}.prose .guide-factors p{font-size:11px}.decision-branches{gap:14px;padding-top:20px}.decision-branches>div{padding:15px 12px}.decision-branches>div:before{top:-21px;height:20px}.decision-branches strong{font-size:11px}.prose .decision-branches p{font-size:11px;line-height:1.8}.prose .decision-start{font-size:13px;padding:17px 13px}.learning-directory{display:block;padding-bottom:55px;margin-bottom:35px}.learning-directory h2{font-size:43px}.learning-directory-intro>p:last-child{font-size:12px;margin-top:23px}.learning-directory-tree{margin-top:35px}.learning-directory-tree>details{padding:18px 0 22px}.learning-directory-tree strong{font-size:19px}.learning-directory-tree a{font-size:12px}.learning-directory-tree details>p{font-size:10px}.learning-directory-tree a>span{font-size:8px}}
@media(prefers-reduced-motion:reduce){.guide-progress>span,.toc-expand,.guide-tree a{transition:none}}
@media(min-width:761px){
 .guide-tree a{font-size:11px;padding-block:6px}
 .toc-branch{margin-bottom:17px}
 .toc-branch>details>summary{font-size:11px;padding-bottom:8px}
 .guide-tree .toc-twigs a{font-size:10px;padding-block:5px}
 .toc-tree-shell>summary{margin-bottom:17px}
 .toc-branch>details>ol>li:before{top:14px}
 .toc-twigs>li:before{top:12px}
 .guide-rhythm th,.guide-rhythm td{font-size:12px}
 .guide-rhythm thead th{font-size:10px}
 .rhythm-key{font-size:11px}
 .prose .rhythm-notes li{font-size:12px}
 .prose .guide-visual figcaption{font-size:11px}
}
@media(max-width:760px){
 .guide-table-wrap{overflow-x:auto;overscroll-behavior-x:contain}
 .guide-matrix th,.guide-matrix td{font-size:12px;line-height:1.65}
 .guide-matrix thead th{font-size:9px}
 .guide-matrix:has(thead th:nth-child(4)){min-width:560px}
}

@media(max-width:760px){.prose .guide-scroll-note{display:block;font-size:10px;color:#687074;margin:0 0 12px}}

/* Center the reading column itself; retain natural left-aligned prose. */
.article-intro{text-align:left}
.article-intro h1,.article-intro>p:not(.eyebrow){margin-inline:auto}
.article-intro .breadcrumbs,.article-byline{justify-content:flex-start}
.article-layout.wrap,.about-layout.wrap{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,min(720px,54vw)) minmax(0,1fr);gap:clamp(22px,2.3vw,34px)}
.article-layout>.article-toc{grid-column:1;min-width:0;max-width:210px;text-align:left}
.article-layout>.guide-prose,.about-layout>.prose{grid-column:2;min-width:0;max-width:720px;text-align:left}
.guide-reading{justify-content:flex-end}
.guide-prose .prose-section>h2,.guide-prose .prose-section>p{margin-inline:0}
.guide-prose .prose-section>p{max-width:none}
.guide-prose .guide-visual h3,.guide-prose .guide-visual figcaption,.guide-prose .guide-takeaway p{margin-inline:0}
.guide-prose .article-service-links{justify-content:flex-start}
.guide-prose .prose-section>ul,.guide-prose .article-sources ul,.guide-prose .guide-sequence,.guide-prose .guide-zones,.guide-prose .guide-factors,.guide-prose .decision-branches,.guide-prose .rhythm-notes,.guide-prose .guide-table-wrap{text-align:left}
.about-layout>.scope-box{grid-column:1;min-width:0;text-align:left}
.about-intro.wrap>h1,.about-intro.wrap>p,.about-intro.wrap>.breadcrumbs{max-width:720px;margin-inline:auto;text-align:left}
@media(max-width:1100px){
 .article-layout.wrap,.about-layout.wrap{display:block}
 .article-layout>.article-toc,.article-layout>.guide-prose,.about-layout>.scope-box,.about-layout>.prose{grid-column:auto;max-width:720px;margin-inline:auto}
 .article-layout>.article-toc{position:static;max-height:none;overflow:visible;margin-bottom:38px;padding-right:0}
 .about-layout>.scope-box{margin-bottom:45px}
}