:root{--paper:#f6f8fc;--white:#fff;--ink:#17253d;--muted:#5b687c;--blue:#2859da;--line:#dce3ef;--soft:#eaf0fd;--radius:12px;font-family:Inter,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;color:var(--ink);background:var(--paper);font-synthesis:none}*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:100px}body{margin:0}a{color:inherit;text-decoration:none}button,input{font:inherit}button,a,input,summary{-webkit-tap-highlight-color:transparent}a,button,summary{touch-action:manipulation}button{cursor:pointer}a:focus-visible,button:focus-visible,input:focus-visible,summary:focus-visible{outline:3px solid var(--blue);outline-offset:5px}::selection{background:#d2defc}h1,h2,h3,p{margin:0}h1,h2,h3{letter-spacing:-.04em}p{line-height:1.7}.wrap{width:min(1160px,calc(100% - 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var(--line);background:white}.intro-inner{display:grid;grid-template-columns:1fr 1.6fr auto;gap:50px;padding-block:27px;align-items:center}.intro-inner>p:first-child{font-size:14px;line-height:1.5}.intro-inner>p:nth-child(2){font-size:12px;color:var(--muted);max-width:455px}.intro-inner>a{font-size:11px;font-weight:650}.intro-inner>a:hover{color:var(--blue)}.chapter-section{padding-block:80px}.section-heading{display:flex;align-items:flex-end;justify-content:space-between;gap:24px}.section-heading h2,.introduction h2,.start-banner h2{font-size:clamp(27px,3vw,36px);line-height:1.2;margin:12px 0}.section-heading p:not(.eyebrow){font-size:14px;color:var(--muted)}.chapter-search{margin:30px 0 20px;max-width:580px}.chapter-search label{font-size:11px;font-weight:650;display:block;margin-bottom:9px}.search-field{position:relative;display:flex;align-items:center;gap:12px;border:1px solid var(--line);border-radius:7px;background:white;padding:0 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p{color:#244a9a}.heading-link{font-size:.65em;color:var(--blue);margin-left:12px;opacity:.3}.heading-link:hover,.heading-link:focus-visible{opacity:1}.chapter-pagination{display:grid;grid-template-columns:1fr 1fr;gap:20px;border-top:1px solid var(--line);padding-top:27px;margin:24px 0 70px}.chapter-pagination a{display:grid;gap:8px;padding:17px;border:1px solid var(--line);border-radius:7px;background:white}.chapter-pagination a:last-child{text-align:right}.chapter-pagination a:hover{border-color:var(--blue)}.chapter-pagination small{font-size:9px;color:var(--muted);letter-spacing:.06em}.chapter-pagination strong{font-size:17px;font-weight:600}.guide{padding-block:65px 85px;max-width:900px}.guide h1{font-size:clamp(36px,5vw,58px);line-height:1.1;margin:20px 0}.guide-lead{font-size:16px;color:var(--muted);max-width:660px;margin:25px 0 40px}.guide-list{display:grid;gap:12px}.guide-list details{background:white;border:1px solid var(--line);border-radius:9px;overflow:hidden}.guide-list summary{display:flex;align-items:center;gap:25px;cursor:pointer;list-style:none;padding:23px 27px}.guide-list summary::-webkit-details-marker{display:none}.guide-list summary strong{font-size:20px;display:block;letter-spacing:-.02em}.guide-list summary small{font-size:11px;color:var(--muted);display:block;margin-top:5px}.detail-plus{margin-left:auto;font-size:25px;color:var(--blue);transition:transform .15s}.guide-list details[open] .detail-plus{transform:rotate(45deg)}.guide-content{padding:0 27px 24px 66px}.guide-content p{color:var(--muted);font-size:14px;margin-bottom:10px}.guide-content ul{padding-left:18px;display:grid;gap:12px;font-size:13px;color:var(--blue);margin-top:24px}.guide-content a:hover{text-decoration:underline}.basis-grid{grid-template-columns:repeat(2,1fr);margin-bottom:30px}
@media(min-width:1450px){.hero{padding-block:105px}.hero h1{font-size:68px}}
@media(max-width:1050px){.hero{gap:35px}.hero h1{font-size:48px}.hero-actions{gap:18px}.intro-inner{gap:25px;grid-template-columns:1fr 1.5fr}.intro-inner>a{grid-column:2}.chapter-grid{grid-template-columns:repeat(2,1fr)}.introduction{gap:50px}.reader-layout{gap:35px;grid-template-columns:170px minmax(0,1fr)}.chapter-card{min-height:250px}}
@media(max-width:760px){html{scroll-padding-top:90px}.wrap{width:calc(100% - 40px)}.header-inner{width:calc(100% - 40px);height:75px;gap:15px}.brand{font-size:16px;max-width:155px}.site-header nav{gap:15px;font-size:11px;flex-shrink:0}.site-header .nav-start{display:none}.hero{grid-template-columns:1fr;padding-top:46px;padding-bottom:45px;gap:40px}.hero h1{font-size:clamp(42px,8vw,60px)}.hero-description{font-size:15px}.hero-note{font-size:10px}.framework-map{padding:20px;max-width:540px;width:100%}.intro-inner{grid-template-columns:1fr;gap:15px;padding-block:24px}.intro-inner>a{grid-column:auto}.chapter-section{padding-block:48px}.section-heading{align-items:start;flex-direction:column;gap:16px}.section-heading h2{max-width:350px}.chapter-search{margin-top:26px}.chapter-search input{font-size:11px}.chapter-grid{gap:12px;margin-top:15px}.chapter-card{padding:18px;min-height:270px}.chapter-card h3{font-size:23px}.card-top{margin-bottom:22px}.card-subtitle{font-size:10px}.introduction{grid-template-columns:1fr;gap:27px;padding-block:40px}.introduction h2 br{display:none}.video-panel{max-width:540px;width:100%}.start-banner{align-items:start;flex-direction:column;padding:26px;margin-bottom:45px}.start-banner h2{font-size:26px}.site-footer{padding:27px 20px;flex-wrap:wrap;gap:24px;font-size:10px}.footer-note{width:100%;border-top:1px solid var(--line);padding-top:20px}.reader-layout{display:block}.reader-sidebar{position:static}.chapter-nav{border-block:1px solid var(--line);padding:10px 0}.chapter-nav nav{grid-template-columns:repeat(4,1fr);gap:5px;margin-block:8px}.chapter-nav a{padding:10px 6px;font-size:11px;gap:7px}.chapter-nav a>span{display:none}.breadcrumb{padding-block:23px}.article-header{padding-top:33px}.article-header h1{font-size:48px}.article-body{font-size:15px}.article-body h2{font-size:25px}.article-body h3{font-size:19px}.article-description{font-size:15px}.guide{padding-block:40px 55px}.guide-lead{font-size:15px}.guide-list summary{padding:20px;gap:18px}.guide-content{padding:0 20px 22px 50px}.chapter-pagination{gap:12px}.chapter-pagination a{padding:14px}.chapter-pagination strong{font-size:15px}}
@media(max-width:370px){.header-inner,.wrap{width:calc(100% - 30px)}.site-header nav{gap:12px}.hero h1{font-size:40px}.chapter-grid{grid-template-columns:1fr}.chapter-card{min-height:225px}.hero-actions{align-items:flex-start;flex-direction:column}.map-three small{font-size:9px}.framework-map{padding:15px}.map-row>a>span:first-child{font-size:12px}.map-three>a{padding:16px 9px}.map-heading{font-size:8px}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,*::before,*::after{transition:none!important;animation:none!important}}
@media print{.site-header,.site-footer,.reader-sidebar,.contents,.chapter-pagination,.heading-link,.breadcrumb,.skip-link{display:none!important}body{background:white}.wrap{width:100%}.reader-layout{display:block}.article-body{font-size:11pt}.article-header h1{font-size:30pt}h2,h3{break-after:avoid}blockquote,li{break-inside:avoid}a{color:inherit}}

/* The chapter navigator follows the same hierarchy as the framework overview. */
.framework-map--chapters{max-width:860px;margin:26px auto 0;padding:38px;border-radius:24px}
.framework-map--chapters .map-heading{font-size:12px;margin-bottom:28px}
.framework-map--chapters .map-stack,.framework-map--chapters .map-row{gap:16px}
.framework-map--chapters .map-row>a{min-height:110px;padding:24px 28px;border-radius:11px}
.framework-map--chapters .map-row>a>span:first-child{font-size:22px}
.framework-map--chapters .map-row small{font-size:15px;margin-top:8px}
.framework-map--chapters .map-arrow{font-size:18px;right:23px;top:23px}
.framework-map--chapters .map-three>a{padding:24px 20px;min-height:130px}
.framework-map--chapters .map-caption{font-size:14px;margin-top:30px}
@media(max-width:760px){
  .framework-map--chapters{padding:20px 16px;border-radius:16px}
  .framework-map--chapters .map-heading{font-size:9px;margin-bottom:20px}
  .framework-map--chapters .map-stack,.framework-map--chapters .map-row{gap:10px}
  .framework-map--chapters .map-row>a{min-height:80px;padding:16px;border-radius:7px}
  .framework-map--chapters .map-row>a>span:first-child{font-size:16px}
  .framework-map--chapters .map-row small{font-size:11px;margin-top:6px}
  .framework-map--chapters .map-arrow{font-size:12px;right:10px;top:10px}
  .framework-map--chapters .map-three>a{padding:20px 9px 14px;min-height:105px}
  .framework-map--chapters .map-three>a>span:first-child{font-size:14px}
  .framework-map--chapters .map-three small{font-size:10px}
  .framework-map--chapters .map-caption{font-size:11px;margin-top:22px}
}
@media(max-width:370px){
  .brand{font-size:14px;max-width:130px}
  .framework-map--chapters .map-three>a>span:first-child{font-size:12px}
  .framework-map--chapters .map-three small{font-size:9px}
}