/* V3 / THE LIVING SYLLABUS — one document, one roadmap, one continuous reading experience */
:root{color-scheme:light;--paper:#f4f2ec;--ink:#141412;--mid:#57554f;--quiet:#858078;--rule:#d8d4cb;--faint:#e6e2d9;--surface:#eeeae2;--car:#242424;--car-light:#454441;--car-window:#999997;--progress:#181817;--progress-h:57px;--head-h:65px;--sidebar-w:clamp(266px,23.2vw,336px);--font:Arial,'Helvetica Neue',Helvetica,sans-serif;--ease:cubic-bezier(.23,1,.32,1);--reading-width:940px}
:root[data-theme="dark"]{color-scheme:dark;--paper:#111110;--ink:#eeece7;--mid:#aaa69f;--quiet:#828079;--rule:#393835;--faint:#292825;--surface:#1c1b1a;--car:#cdccc8;--car-light:#f0efea;--car-window:#646460;--progress:#eae8e3}
*,*::before,*::after{box-sizing:border-box}html{scroll-padding-top:150px;background:var(--paper);scroll-behavior:smooth}body{margin:0;background:var(--paper);color:var(--ink);font:16px/1.52 var(--font);-webkit-font-smoothing:antialiased;min-width:320px;transition:background-color .42s,color .42s}body.dialog-open,body.drawer-open{overflow:hidden}button,input{font:inherit}button{cursor:pointer;background:none;border:0;color:inherit}a{color:inherit;text-decoration:none}button:focus-visible,a:focus-visible,input:focus-visible{outline:2px solid var(--ink);outline-offset:4px}svg{fill:none;stroke:currentColor;stroke-width:1.7;stroke-linecap:round;stroke-linejoin:round}h1,h2,h3,h4,p{margin:0}ul,ol{padding:0;margin:0}a,button{-webkit-tap-highlight-color:transparent}::selection{background:var(--ink);color:var(--paper)}.visually-hidden{position:absolute!important;width:1px;height:1px;overflow:hidden;clip-path:inset(50%);white-space:nowrap}
/* Traveling indicator: anchored to real document position, not topic completion. */
.progress-dock{height:var(--progress-h);position:sticky;top:0;z-index:110;background:var(--paper);border-bottom:1px solid var(--faint);padding:7px clamp(17px,3.1vw,56px) 3px;transition:background-color .42s,border-color .42s}.progress-meta{display:flex;justify-content:space-between;gap:20px;align-items:center;line-height:21px}.progress-statement{font-size:clamp(13px,1.05vw,16px);font-weight:700;letter-spacing:-.045em;white-space:nowrap}.progress-statement strong{font-variant-numeric:tabular-nums;font-weight:900;letter-spacing:-.035em}.progress-context{color:var(--quiet);font-size:9px;font-weight:800;letter-spacing:.13em;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.progress-track{position:relative;height:29px;margin-top:0;border-bottom:2px solid var(--rule)}.progress-fill{position:absolute;bottom:-2px;left:0;height:2px;width:0%;background:var(--progress);will-change:width}.car-position{position:absolute;bottom:-2px;left:0;width:100px;height:38px;will-change:transform;pointer-events:none}
/* Calm utility header */
.masthead{position:sticky;top:var(--progress-h);z-index:100;height:var(--head-h);display:flex;align-items:center;justify-content:space-between;gap:20px;padding:0 clamp(20px,3.2vw,56px);background:var(--paper);border-bottom:1px solid var(--rule);transition:background-color .42s,border-color .42s}.brand{display:flex;gap:17px;align-items:center;min-width:0}.brand-letter{font-size:23px;line-height:1;font-weight:900;letter-spacing:-.14em;padding-right:4px;white-space:nowrap}.brand-dot{color:var(--quiet)}.brand-name{font-size:8.5px;font-weight:850;line-height:1.22;letter-spacing:.13em;padding-left:15px;border-left:1px solid var(--rule)}.top-actions{display:flex;gap:18px;align-items:center}.header-locator{font-size:9px;font-weight:800;letter-spacing:.13em;color:var(--quiet);white-space:nowrap;margin-right:15px;max-width:260px;overflow:hidden;text-overflow:ellipsis}.action-btn{display:flex;gap:10px;align-items:center;min-height:44px;font-size:12px;font-weight:750}.action-btn svg,.mobile-roadmap-btn svg{width:19px;height:19px;transition:transform .3s var(--ease)}.action-btn:hover svg{transform:scale(1.12)}.action-btn kbd{border:1px solid var(--rule);padding:1px 5px;border-radius:3px;font-size:10px;color:var(--quiet);margin-left:5px}.action-btn+.action-btn{border-left:1px solid var(--rule);padding-left:17px}.mobile-roadmap-btn{display:none}.micro-label{display:block;color:var(--quiet);font-size:9px;font-weight:800;letter-spacing:.16em;line-height:1.3;text-transform:uppercase}
/* Two-column document + sticky, independently-scrollable roadmap. */
.site-grid{display:grid;grid-template-columns:var(--sidebar-w) minmax(0,1fr);align-items:start}.roadmap{position:sticky;top:calc(var(--progress-h) + var(--head-h));height:calc(100dvh - var(--progress-h) - var(--head-h));display:flex;flex-direction:column;min-height:0;padding:33px 0 0 clamp(19px,3.1vw,52px);border-right:1px solid var(--rule);background:var(--paper);z-index:60;transition:background-color .42s,border-color .42s}.roadmap-heading{flex:none;padding:0 20px 25px 0}.roadmap-heading h2{font-size:24px;letter-spacing:-.07em;line-height:1.1;margin-top:12px;font-weight:850}.roadmap-heading h2 em{font-weight:400;font-style:normal;color:var(--quiet)}.roadmap-list{position:relative;overflow-y:auto;overscroll-behavior:contain;padding-right:10px;scrollbar-width:thin;scrollbar-color:var(--rule) transparent}.roadmap-list::-webkit-scrollbar{width:3px}.roadmap-list::-webkit-scrollbar-thumb{background:var(--rule)}.nav-unit{padding-right:10px}.nav-unit-label{width:100%;display:flex;align-items:center;gap:9px;text-align:left;font-size:9px;font-weight:900;color:var(--quiet);letter-spacing:.12em;padding:19px 0 10px;border-top:1px solid var(--rule)}.nav-unit:first-child .nav-unit-label{border-top:0}.nav-unit-label strong{font-weight:850}.nav-unit-chapters{margin-bottom:10px}.nav-chapter{padding:0 0 1px}.nav-chapter-trigger{width:100%;display:flex;align-items:center;gap:12px;text-align:left;padding:11px 3px 11px 1px;line-height:1.3;color:var(--mid);transition:color .22s}.nav-chapter.is-active .nav-chapter-trigger{color:var(--ink)}.nav-chapter-number{font-size:10px;min-width:17px;color:var(--quiet);font-weight:800}.nav-chapter-name{font-size:12.5px;letter-spacing:-.013em;flex:1;font-weight:700}.nav-chevron{width:13px;height:13px;transform:rotate(-90deg);transition:transform .35s var(--ease)}.nav-chapter.is-open .nav-chevron{transform:rotate(0)}.nav-topics{height:0;visibility:hidden;overflow:hidden;position:relative;margin-left:9px;border-left:1px solid var(--rule);transition:height .46s var(--ease),visibility .46s}.nav-chapter.is-open .nav-topics{visibility:visible}.nav-topics-inner{position:relative;padding:4px 0 9px 0}.nav-topic{position:relative;display:block;width:100%;text-align:left;border-left:2px solid transparent;margin-left:-1px;padding:7px 9px 7px 17px;line-height:1.3;font-size:11.25px;color:var(--quiet);transition:color .26s,background-color .26s,border-color .26s;overflow-wrap:break-word}.nav-topic:hover{color:var(--ink)}.nav-topic.is-active{color:var(--ink);font-weight:800;border-left-color:var(--ink);background:var(--surface)}.nav-chapter.is-active .nav-chapter-name{font-weight:850}.roadmap-footer{flex:none;margin-top:auto;display:flex;justify-content:space-between;gap:5px;padding:20px 16px 24px 0;border-top:1px solid var(--rule);font-size:8px;font-weight:750;letter-spacing:.035em;color:var(--quiet)}.roadmap-close,.sidebar-scrim{display:none}
/* Publication cover */
.main-content{min-width:0;overflow:clip}.cover,.course-document{width:min(calc(100% - 2*clamp(26px,5.2vw,100px)),var(--reading-width));margin:0 auto}.cover{padding:clamp(55px,7.4vw,116px) 0 clamp(55px,6vw,96px)}.cover-kicker{display:flex;align-items:center;justify-content:space-between;gap:12px;font-size:10px;font-weight:750;letter-spacing:.13em;color:var(--quiet)}.cover h1{font-size:clamp(60px,8.1vw,128px);font-weight:900;letter-spacing:-.094em;line-height:.88;max-width:1050px;margin:50px 0 48px -.07em;overflow-wrap:normal}.cover h1 .cover-last{display:block}.cover-underline{height:1px;background:var(--ink);width:100%;transform-origin:left;animation:cover-rule .9s var(--ease) both}.cover-footer{display:flex;justify-content:space-between;gap:25px;margin-top:22px;font-size:13px}.cover-footer strong{font-weight:850}.cover-footer span{color:var(--mid)}.cover-footnote{display:flex;align-items:center;gap:9px;margin-top:35px;font-size:10px;letter-spacing:.085em;font-weight:800;color:var(--quiet)}.cover-footnote svg{width:18px;height:18px;animation:nudge 2.8s ease-in-out infinite}.cover h1 span{display:block;animation:cover-title .85s var(--ease) both}.cover h1 span:last-child{animation-delay:.075s}
/* All source topics form one uninterrupted academic document. */
.course-document{padding-bottom:150px}.unit-intro{padding:49px 0 30px;border-top:1px solid var(--ink);display:flex;justify-content:space-between;gap:14px;align-items:baseline}.unit-intro .unit-count{font-size:clamp(60px,8vw,122px);line-height:.78;font-weight:900;letter-spacing:-.09em}.unit-intro .unit-caption{font-size:11px;color:var(--quiet);font-weight:800;letter-spacing:.11em}.chapter-section{position:relative;padding:28px 0 76px}.chapter-head{position:relative;padding:38px 0 48px;border-top:1px solid var(--rule)}.chapter-head-top{display:flex;align-items:center;justify-content:space-between;gap:10px}.chapter-eyebrow{color:var(--quiet);font-size:10px;font-weight:800;letter-spacing:.13em;text-transform:uppercase}.chapter-index-number{font-size:11px;color:var(--quiet);letter-spacing:.08em;font-weight:750}.chapter-head h2{font-size:clamp(45px,5.5vw,83px);font-weight:900;letter-spacing:-.074em;line-height:1.01;margin:25px 0 23px -.05em;overflow-wrap:break-word}.chapter-meta{display:flex;gap:12px;align-items:center;font-size:11px;color:var(--mid)}.chapter-meta i{display:inline-block;height:3px;width:3px;background:var(--quiet);border-radius:50%}.topic-group{position:relative;padding:37px 0 48px;border-top:1px solid var(--rule);scroll-margin-top:150px;transition:border-color .36s}.topic-group.is-current{border-top-color:var(--ink)}.topic-group-head{display:grid;grid-template-columns:39px minmax(0,1fr);gap:16px;align-items:start}.topic-number{font-size:12px;line-height:1.3;font-weight:800;letter-spacing:-.01em;color:var(--quiet);padding-top:8px;font-variant-numeric:tabular-nums}.topic-title{font-size:clamp(26px,3vw,43px);line-height:1.12;letter-spacing:-.052em;font-weight:860;max-width:850px;overflow-wrap:break-word}.topic-head-rule{height:2px;background:var(--ink);width:0;margin:21px 0 0 55px;transition:width .65s var(--ease)}.topic-group.is-current .topic-head-rule{width:clamp(32px,5vw,60px)}.topic-source{font-size:9px;color:var(--quiet);font-weight:700;letter-spacing:.07em;white-space:nowrap}.topic-empty{margin:12px 0 0 55px;color:var(--mid);font-size:13px}.chapter-end{display:flex;justify-content:space-between;gap:15px;border-top:1px solid var(--rule);padding-top:16px;font-size:10px;font-weight:800;letter-spacing:.12em;color:var(--quiet)}
/* Full inherited hierarchy — no hidden layers and no separate study views. */
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/* Editorial entrances: content exists/readable before scripting and while scrolling fast. */
@keyframes cover-title{from{transform:translateY(18px);opacity:.48}to{transform:translateY(0);opacity:1}}@keyframes cover-rule{from{transform:scaleX(.05);opacity:.35}to{transform:scaleX(1);opacity:1}}@keyframes nudge{0%,100%{transform:translateY(0)}50%{transform:translateY(5px)}}
@media(prefers-reduced-motion:no-preference){.entrance-pending>.topic-group-head,.entrance-pending>.chapter-head-top,.entrance-pending>h2{transform:translateY(13px);opacity:.85}.entrance-pending>.topic-group-head,.entrance-pending>.chapter-head-top,.entrance-pending>h2{transition:transform .75s var(--ease),opacity .75s}.entrance-pending.entrance-seen>.topic-group-head,.entrance-pending.entrance-seen>.chapter-head-top,.entrance-pending.entrance-seen>h2{transform:translateY(0);opacity:1}.entrance-pending .topic-head-rule{transform:scaleX(.35);transform-origin:left;transition:transform .85s var(--ease),width .65s var(--ease)}.entrance-pending.entrance-seen .topic-head-rule{transform:scaleX(1)}.topic-group.entrance-pending .tree-depth-1>.tree-node{transform:translateY(6px);opacity:.90;transition:transform .6s var(--ease),opacity .6s var(--ease);transition-delay:var(--delay,0ms)}.topic-group.entrance-pending.entrance-seen .tree-depth-1>.tree-node{transform:translateY(0);opacity:1}}
/* Search is intentionally the only overlay besides the phone roadmap. */
.search-modal{display:none;position:fixed;inset:0;z-index:200;align-items:flex-start;justify-content:center;padding:clamp(20px,8vh,90px) 18px 18px}.search-modal.is-open{display:flex}.search-shade{position:absolute;inset:0;background:rgba(0,0,0,.57);backdrop-filter:blur(8px)}.search-dialog{position:relative;z-index:1;width:min(750px,100%);max-height:calc(100dvh - 100px);display:flex;flex-direction:column;overflow:hidden;background:var(--paper);border:1px solid var(--rule);box-shadow:0 25px 130px rgba(0,0,0,.18)}.search-label-row,.search-details,.search-bottom{display:flex;justify-content:space-between;gap:15px;font-size:10px;font-weight:800;letter-spacing:.12em;color:var(--quiet)}.search-label-row{padding:24px 28px;border-bottom:1px solid var(--rule)}.search-label-row button{font-size:11px;letter-spacing:.1em;font-weight:750}.search-label-row button span{font-size:20px;font-weight:400;margin-left:8px}.search-field{display:flex;align-items:center;gap:17px;padding:25px 28px;border-bottom:1px solid var(--rule)}.search-field svg{width:23px;height:23px;flex:none}.search-field input{outline:0;border:0;background:none;min-width:0;flex:1;color:var(--ink);font-size:clamp(17px,2.4vw,24px);font-weight:650;letter-spacing:-.02em}.search-field input::-webkit-search-cancel-button{cursor:pointer}.search-field input::placeholder{color:var(--quiet)}.search-details{padding:17px 28px;border-bottom:1px solid var(--rule);font-size:9px}.search-results{overflow-y:auto;max-height:min(55vh,510px);min-height:110px}.search-result{width:100%;text-align:left;display:flex;gap:19px;align-items:flex-start;padding:16px 29px;border-bottom:1px solid var(--faint);transition:background-color .2s}.search-result:hover,.search-result.is-selected{background:var(--surface)}.search-result-index{color:var(--quiet);font-size:10px;font-weight:800;padding-top:4px;min-width:23px}.search-result-text{display:block;flex:1;min-width:0}.search-result-text strong{display:block;font-size:16px;letter-spacing:-.022em;line-height:1.3}.search-result-text small{display:block;color:var(--quiet);font-size:11px;margin-top:6px}.search-result-arrow{font-size:17px;color:var(--quiet)}.search-empty{padding:38px 28px;color:var(--mid);font-size:13px}.search-bottom{padding:17px 28px;border-top:1px solid var(--rule);font-size:8px}
/* A deliberately modest terminal page; 100% has a clear location. */
.endnote{padding:65px 0 30px;border-top:2px solid var(--ink)}.endnote .end-big{font-weight:900;font-size:clamp(47px,7vw,110px);letter-spacing:-.075em;line-height:.98;margin:25px 0 30px}.endnote .end-meta{display:flex;justify-content:space-between;gap:20px;color:var(--quiet);font-size:11px;font-weight:700}.endnote a{text-decoration:underline;text-underline-offset:5px;text-decoration-color:var(--quiet)}
@media(min-width:1600px){.site-grid{grid-template-columns:var(--sidebar-w) minmax(0,1fr)}.main-content .cover,.main-content .course-document{margin-left:clamp(80px,10vw,230px);margin-right:auto}}
@media(max-width:1160px){:root{--sidebar-w:254px}.roadmap{padding-left:24px}.main-content .cover,.main-content .course-document{width:calc(100% - 2*clamp(28px,4vw,65px))}.header-locator{display:none}.cover h1{font-size:clamp(53px,7.2vw,92px)}}
@media(max-width:800px){:root{--head-h:60px;--sidebar-w:0px}.site-grid{display:block}.roadmap{position:fixed;z-index:98;left:0;top:calc(var(--progress-h) + var(--head-h));bottom:0;height:auto;width:min(370px,91vw);padding:23px 0 0 24px;border-right:1px solid var(--rule);box-shadow:28px 0 80px rgba(0,0,0,.12);transform:translateX(-106%);visibility:hidden;transition:transform .42s var(--ease),visibility .42s,background-color .42s}.roadmap.is-open{transform:translateX(0);visibility:visible}.roadmap-heading{padding-bottom:17px;display:flex;justify-content:space-between;align-items:center}.roadmap-close{display:grid;place-items:center;font-size:28px;font-weight:400;width:40px;height:40px;margin-right:12px}.sidebar-scrim{display:block;position:fixed;z-index:95;inset:calc(var(--progress-h) + var(--head-h)) 0 0;background:rgba(0,0,0,.38);opacity:0;pointer-events:none;transition:opacity .36s}.sidebar-scrim.is-open{opacity:1;pointer-events:auto}.mobile-roadmap-btn{display:flex;align-items:center;gap:8px;font-size:11px;font-weight:800;min-height:44px}.mobile-roadmap-btn svg{width:18px;height:18px}.action-btn+.action-btn{padding-left:14px}.top-actions{gap:13px}.cover,.course-document{max-width:none!important;width:calc(100% - 2*clamp(23px,5.2vw,48px))!important;margin:auto!important}.cover{padding-top:57px;padding-bottom:65px}.cover h1{font-size:clamp(59px,10vw,96px);margin:39px 0 36px}.chapter-head h2{font-size:clamp(43px,6.1vw,68px)}.topic-title{font-size:clamp(26px,4.1vw,39px)}}
@media(max-width:540px){:root{--progress-h:60px;--head-h:56px}.progress-dock{padding:7px 16px 3px}.progress-meta{align-items:baseline;gap:10px}.progress-statement{font-size:13px;letter-spacing:-.04em}.progress-context{font-size:8px;max-width:100px}.progress-track{height:31px}.car-position{width:85px;height:34px}.masthead{padding:0 18px}.brand{gap:10px}.brand-letter{font-size:22px}.brand-name{font-size:7px;padding-left:9px}.top-actions{gap:13px}.action-btn{gap:6px}.action-btn span,.action-btn kbd{display:none}.action-btn+.action-btn{padding-left:11px}.action-btn svg{width:19px}.mobile-roadmap-btn span{display:none}.mobile-roadmap-btn svg{width:21px}.cover{padding-top:44px;padding-bottom:55px}.cover-kicker{font-size:8px}.cover h1{font-size:clamp(46px,11.6vw,64px);line-height:.94;letter-spacing:-.084em;margin:42px 0 29px -.06em}.cover-footer{font-size:11px;flex-direction:column;gap:5px}.cover-footnote{margin-top:25px;font-size:9px}.unit-intro{padding:36px 0 23px}.unit-intro .unit-count{font-size:68px}.unit-intro .unit-caption{font-size:9px;text-align:right}.chapter-section{padding:14px 0 55px}.chapter-head{padding:27px 0 35px}.chapter-head h2{font-size:clamp(35px,9.2vw,51px);margin:22px 0 21px}.chapter-meta{font-size:10px}.topic-group{padding:25px 0 34px}.topic-group-head{grid-template-columns:24px minmax(0,1fr);gap:11px}.topic-number{font-size:11px;padding-top:5px}.topic-title{font-size:clamp(23px,6.15vw,31px);line-height:1.15}.topic-head-rule{margin:16px 0 0 35px}.tree{margin:14px 0 0 35px}.tree .tree{padding-left:11px;margin:5px 0 3px 8px}.tree .tree .tree{padding-left:10px;margin-left:6px}.tree .tree .tree .tree{padding-left:9px;margin-left:3px}.tree .tree .tree .tree .tree{padding-left:7px;margin-left:1px}.tree-node>.node-row{gap:7px;padding:6px 0}.tree-node>.node-row::after{left:-11px;width:7px;top:18px}.node-title,.has-children>.node-row>.node-title,.tree-depth-2>.tree-node>.node-row>.node-title,.tree-depth-3>.tree-node>.node-row>.node-title,.tree-depth-4>.tree-node>.node-row>.node-title{font-size:13.5px;line-height:1.42}.has-children>.node-row>.node-title{font-size:14.4px}.node-page{font-size:8px}.topic-empty{margin-left:35px}.endnote{padding-top:45px}.endnote .end-big{font-size:55px}.search-modal{padding:0}.search-dialog{max-height:100dvh;height:100dvh;width:100vw}.search-label-row{padding:20px}.search-field{padding:20px}.search-details{padding:14px 20px}.search-details span:last-child,.search-bottom span:last-child{display:none}.search-result{padding:16px 20px}.search-bottom{padding:14px 20px}.search-results{max-height:none;flex:1}}
@media(max-width:360px){.cover h1{font-size:11.45vw}.cover-kicker span:last-child{display:none}.progress-context{max-width:69px}.roadmap-heading h2{font-size:22px}.node-page{font-size:7px}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto!important}*,*::before,*::after{animation:none!important;transition:none!important;scroll-behavior:auto!important}.car-position,.progress-fill{will-change:auto}}
@media print{html,body{color:#111!important;background:#fff!important;scroll-behavior:auto!important}.progress-dock,.masthead,.roadmap,.sidebar-scrim,.search-modal,.cover-footnote{display:none!important}.site-grid{display:block}.cover,.course-document{width:100%!important;max-width:none!important;margin:0!important}.cover{padding:10px 0 25px}.cover h1{font-size:62pt}.course-document{padding:0}.unit-intro{padding-top:30px}.chapter-section{padding-bottom:20px;break-before:page}.chapter-head h2{font-size:35pt}.topic-group{break-inside:avoid-page;padding:20px 0}.topic-title{font-size:20pt}.tree-node{break-inside:avoid}.node-title{color:#111!important}.endnote{display:none}}
/* Sidebar chapter controls and smoothly interpolated topic spine. */
.nav-chapter-expander{width:29px;height:29px;display:grid;place-items:center;flex:none;margin:-4px -4px -4px 0;color:var(--quiet)}.nav-chapter-expander svg{width:15px;height:15px;transition:transform .4s var(--ease)}.nav-chapter.is-open .nav-chapter-expander svg{transform:rotate(180deg)}.nav-chapter-name:hover{text-decoration:underline;text-decoration-color:var(--rule);text-underline-offset:3px}.tree-node{scroll-margin-top:157px}
@media(max-width:540px){}

/* Final editorial refinements: no detached title punctuation or slide-number clutter. */
.cover h1 .brand-dot{display:inline;animation:none} .topic-group{scroll-margin-top:0} .tree-node{scroll-margin-top:0} .nav-topic.is-active{transition:background-color .3s,border-color .3s,color .3s}

/* Motion architecture: a cursor that glides between source topics, plus a filled reading spine. */


.nav-topic.is-active{border-left-color:transparent}

@media(max-width:540px){}
@media(prefers-reduced-motion:no-preference){
 
 
}


/* V3.1 — Academic notation redesign. All academic data and navigation semantics are unchanged. */
.unit-intro {
  display: flex; align-items: flex-end; justify-content: space-between;
  gap: 24px; padding: 32px 0 25px; border-top: 2px solid var(--ink);
}
.unit-marker {display:flex;flex-direction:column;align-items:flex-start;gap:8px;min-width:0}
.unit-intro .unit-count {font-size:11px;letter-spacing:.14em;font-weight:900;line-height:1.4;color:var(--quiet)}
.unit-intro .unit-name {font-size:clamp(21px,2.35vw,31px);font-weight:830;line-height:1.14;letter-spacing:-.045em;color:var(--ink)}
.unit-intro .unit-chapters {font-size:10px;font-weight:800;letter-spacing:.08em;color:var(--quiet);white-space:nowrap;padding-bottom:3px}
.chapter-section {padding:8px 0 65px}
.chapter-head {padding:28px 0 36px;border-top:0}
.chapter-head-top {color:var(--quiet)}
.chapter-eyebrow,.chapter-index-number {font-size:10px;letter-spacing:.13em;font-weight:800;color:var(--quiet)}
.chapter-head h2 {font-size:clamp(43px,5.5vw,77px);letter-spacing:-.068em;line-height:1.02;margin:18px 0 21px}
.chapter-meta {font-size:11px;gap:10px;letter-spacing:.01em}
.chapter-meta i {width:3px;height:3px}
.topic-group {padding:34px 0 41px;border-top:1px solid var(--rule)}
.topic-group.is-current {border-top-color:var(--ink)}
.topic-group::after, .topic-group.is-current::after {content:none!important;display:none!important}
.topic-group-head {display:flex;flex-direction:column;gap:11px}
.topic-kicker {font-size:9px;line-height:1.4;letter-spacing:.13em;font-weight:850;color:var(--quiet)}
.topic-group.is-current .topic-kicker {color:var(--ink)}
.topic-title {max-width:860px;font-size:clamp(27px,3.05vw,41px);font-weight:840;line-height:1.12;letter-spacing:-.052em}
.topic-head-rule {margin:20px 0 0 0;height:1px;background:var(--rule);width:100%!important;transform:none!important;transition:background-color .2s!important}
.topic-group.is-current .topic-head-rule {background:var(--ink)}
.tree {margin:19px 0 0 0}
.tree .tree {margin:6px 0 7px 8px;padding-left:19px;border-left:1px solid var(--rule)}
.tree .tree .tree {margin-left:10px;padding-left:17px}
.tree .tree .tree .tree {margin-left:8px;padding-left:14px}
.tree .tree .tree .tree .tree {margin-left:6px;padding-left:12px}
.tree-node>.node-row::after {display:none}
.tree-node>.node-row {padding:7px 0;gap:12px}
.tree-node>.node-row:before {width:4px;height:4px;background:var(--quiet);border-radius:50%;opacity:.65;transform:translateY(-2px)}
.tree-node.has-children>.node-row:before {height:5px;width:5px;background:var(--ink);opacity:1;border-radius:1px}
.node-title {color:var(--mid);font-weight:485}
.has-children>.node-row>.node-title {color:var(--ink);font-weight:760;letter-spacing:-.018em}
/* The outline's left column identifies chapter > main topic; no duplicate numeric prefixes. */
.nav-unit-label {padding:16px 0 8px;align-items:flex-start;flex-direction:column;gap:3px;letter-spacing:.09em;font-size:9px}
.nav-unit-label strong {letter-spacing:.04em;font-weight:750;font-size:10px;line-height:1.35;color:var(--mid)}
.nav-chapter-trigger {gap:7px;padding:10px 2px 10px 0}
.nav-chapter-name {font-size:13px;font-weight:740;letter-spacing:-.018em;line-height:1.28}
.nav-chapter-number {display:none!important}
.nav-topics {margin-left:0;border-left:0}
.nav-topics-inner {padding:3px 0 9px 0}
.nav-topic {margin-left:0;padding:8px 10px 8px 14px;border-left:2px solid transparent;font-size:11.5px;line-height:1.35}
.nav-topic.is-active {border-left-color:var(--ink)!important;color:var(--ink);background:var(--surface);font-weight:790}
.nav-chapter.is-active .nav-chapter-name {font-weight:880}
.roadmap-progress-spine,.roadmap-cursor{display:none!important}
.roadmap-heading {padding-bottom:22px}
.roadmap-heading h2 {font-size:24px;margin-top:9px}
/* Top strip remains the only scroll-progress animation. */
@media(max-width:800px){
 .unit-intro{padding:29px 0 23px}
 .chapter-head{padding:22px 0 33px}
}
@media(max-width:540px){
 .unit-intro{padding:24px 0 20px;gap:10px;align-items:flex-end}
 .unit-intro .unit-count{font-size:10px;letter-spacing:.12em}
 .unit-intro .unit-name{font-size:22px;max-width:260px}
 .unit-intro .unit-chapters{font-size:8px;letter-spacing:.02em}
 .chapter-section{padding:5px 0 48px}
 .chapter-head{padding:20px 0 29px}
 .chapter-head h2{font-size:clamp(35px,9vw,47px);margin:15px 0 19px}
 .chapter-eyebrow,.chapter-index-number{font-size:9px}
 .topic-group{padding:28px 0 34px}
 .topic-group-head{display:flex;gap:10px}
 .topic-kicker{font-size:9px}
 .topic-title{font-size:clamp(25px,6.5vw,34px)}
 .topic-head-rule{margin:17px 0 0 0}
 .tree{margin:16px 0 0 0}
 .tree .tree{margin:6px 0 6px 8px;padding-left:14px}
 .tree .tree .tree{margin-left:8px;padding-left:13px}
 .tree .tree .tree .tree{margin-left:6px;padding-left:11px}
 .tree .tree .tree .tree .tree{margin-left:5px;padding-left:9px}
 .tree-node>.node-row{padding:6px 0;gap:10px}
}
@media print {.unit-intro .unit-name{font-size:25pt}.unit-intro .unit-count{font-size:10pt}.topic-kicker{font-size:9pt}.topic-head-rule{background:#aaa!important}}

/* Persistent orientation when a long chapter pushes the unit heading out of the roadmap scroll. */
.roadmap-current{flex:none;display:flex;flex-direction:column;gap:5px;margin:0 20px 7px 0;padding:13px 0 12px;border-top:1px solid var(--rule);border-bottom:1px solid var(--faint)}
.roadmap-current>span{font-size:9px;font-weight:840;letter-spacing:.12em;color:var(--quiet)}
.roadmap-current>strong{font-size:12px;font-weight:760;letter-spacing:-.02em;line-height:1.35;color:var(--ink)}
.topic-kicker{display:flex;align-items:baseline;flex-wrap:wrap;gap:10px;max-width:100%;letter-spacing:.085em}
.topic-context{color:var(--quiet);font-weight:700;letter-spacing:.05em;text-transform:uppercase}
.topic-separator{color:var(--rule);font-size:13px;font-weight:400}
.topic-level{color:var(--ink);letter-spacing:.13em}
.topic-group{scroll-margin-top:calc(var(--progress-h) + var(--head-h) + 16px)!important}
.tree-node{scroll-margin-top:calc(var(--progress-h) + var(--head-h) + 16px)!important}
@media(max-width:540px){.roadmap-current{margin-right:15px;padding:11px 0}.topic-kicker{gap:6px;font-size:8px}.topic-separator{font-size:9px}}
/* Root scroll padding already accounts for the fixed controls. Avoid double-offset. */
.topic-group,.tree-node{scroll-margin-top:0!important}

/* V3.2 — Rosso Corsa Ferrari 812 Competizione: the one intentional accent. */
:root{--ferrari-red:#d71920}
.progress-track{border-bottom-color:var(--rule)}
.progress-fill{background:var(--ferrari-red)}
.car-position{width:112px;height:44px;bottom:-4px;overflow:visible;filter:drop-shadow(0 1px 1px rgba(0,0,0,.08))}
/* Native SVG transform attributes animate wheel rotation in viewBox coordinates. */
/* The academic hierarchy has only three visual weights: topic, category, nested term. */
.tree-depth-1 > .tree-node{margin-bottom:5px}
.tree-depth-1 > .tree-node.has-children > .node-row .node-title{font-size:16px;font-weight:780;letter-spacing:-.023em;color:var(--ink)}
.tree-depth-2 > .tree-node.has-children > .node-row .node-title{font-size:14px;font-weight:730}
.tree-depth-3 > .tree-node .node-row .node-title{font-size:13px}
.tree-node>.node-row:before{opacity:.35}
.tree-node.has-children>.node-row:before{opacity:.8}
.tree .tree{border-left-color:var(--faint)}
/* Navigation is signposted by clear labels, not competing counters or moving lines. */
.nav-unit-label{gap:5px}
.nav-chapter-trigger{transition:color .18s var(--ease),background-color .18s var(--ease)}
.nav-topic:hover{background:var(--surface);border-radius:2px}
.nav-topic.is-active{box-shadow:inset 2px 0 0 var(--ink);border-left-color:transparent!important}
.topic-kicker{gap:8px}
.topic-group.is-current .topic-title{color:var(--ink)}
@media(max-width:540px){.car-position{width:90px;height:37px;bottom:-3px}.progress-statement{font-size:12px}.tree-depth-1 > .tree-node.has-children > .node-row .node-title{font-size:15px}.nav-topic{padding-top:9px;padding-bottom:9px}}
@media print{.car-position{display:none!important}.progress-fill{background:#222}}

/* V3.4: use the exact uploaded Ferrari side profile as the progress car. */
.ferrari-photo{display:block;width:100%;height:100%;object-fit:contain;object-position:center bottom;user-select:none;-webkit-user-drag:none}
.car-position{width:128px;height:40px;bottom:-1px;overflow:visible;filter:drop-shadow(0 1px 1px rgba(0,0,0,.10))}
@media(max-width:540px){.car-position{width:102px;height:32px;bottom:0}}

/* The exact uploaded Ferrari image is embedded in HTML so it never fails on file:// or hosting. */
.ferrari-photo{pointer-events:none}