@import"https://fonts.googleapis.com/css2?family=DM+Sans:wght@400;500;600;700&family=Libre+Caslon+Display&display=swap";:root{--paper:#f2f0e8;--white:#fcfbf7;--ink:#263b35;--muted:#65716b;--line:#d6d9ce;--accent:#936e38;--rail:76px;font-family:DM Sans,Arial,sans-serif;color:var(--ink);background:var(--white);font-synthesis:none;font-size:16px}*{box-sizing:border-box}body{margin:0}button,input,select{font:inherit}a{color:inherit;text-decoration:none}button,a,input,select{touch-action:manipulation}button{cursor:pointer;border:1px solid var(--line);background:transparent;color:inherit;padding:.6rem .95rem;border-radius:2px}button:hover{background:#e7e9df}a:hover{color:var(--accent)}:focus-visible{outline:3px solid #af8046;outline-offset:4px}button:disabled{opacity:.5;cursor:default}h1,h2,h3,p{margin:0}h1,h2,h3{font-family:Libre Caslon Display,Georgia,serif;font-weight:400}h1{font-size:clamp(3.4rem,5.5vw,6.2rem);line-height:1.01;letter-spacing:-.045em}h1 em,h2 em{font-weight:400;color:#8c754c}h2{font-size:2.7rem;line-height:1.12;letter-spacing:-.02em}p{line-height:1.75}img{max-width:100%}input[type=range]{display:block;width:100%;accent-color:var(--ink);margin:1rem 0;height:6px}label{font-size:.875rem;display:block}select{display:block;margin-top:.6rem;padding:.7rem;border:1px solid var(--line);border-radius:0;background:var(--white);color:var(--ink);max-width:100%;width:100%}small{font-size:.8rem;line-height:1.6}.skip-link{position:fixed;left:90px;top:-80px;background:var(--ink);color:#fff;padding:1rem;z-index:99}.skip-link:focus{top:10px}.rail{width:var(--rail);position:fixed;inset:0 auto 0 0;z-index:40;background:#253b34;color:#f8f5e8;display:flex;align-items:center;flex-direction:column;border-right:1px solid #182d28}.brand-mark{font-family:Georgia,serif;letter-spacing:-.16em;font-size:2.2rem;padding:23px 0 10px;position:relative}.brand-mark span{color:#cca970;font-size:1.8rem;position:absolute;right:-11px;top:12px}.menu-button{border:0;margin-top:20px;font-size:1.4rem;padding:.4rem}.rail-word{writing-mode:vertical-rl;transform:rotate(180deg);font-size:.72rem;letter-spacing:.26em;margin:auto}.rail-bottom{font-size:2rem;margin:20px}.topbar{margin-left:var(--rail);height:94px;border-bottom:1px solid var(--line);display:flex;align-items:center;justify-content:space-between;padding:0 4vw;background:var(--white);position:relative;z-index:10}.wordmark{font-size:1.2rem;font-weight:600;letter-spacing:-.04em}.wordmark span{display:block;font-size:.61rem;letter-spacing:.2em;font-weight:400;margin-top:5px}.topbar nav{display:flex;gap:2.3rem;font-size:.88rem}.topbar nav [aria-current=page]{border-bottom:1px solid var(--ink)}.page{margin-left:var(--rail);min-height:80vh}.eyebrow{font-family:DM Sans,sans-serif;text-transform:uppercase;letter-spacing:.14em;font-size:.73rem;line-height:1.5}.dek{font-size:1.12rem;line-height:1.8;color:#53665b;max-width:38rem}.home{display:grid;grid-template-columns:53% 47%;align-items:start;background:var(--paper)}.home-stage{position:sticky;top:0;height:100vh;border-right:1px solid var(--line)}.plate-label{position:absolute;z-index:2;top:36px;left:36px;right:36px;display:flex;justify-content:space-between;font-size:.65rem;letter-spacing:.16em;color:#727b6b;gap:1rem}.plate-label span{text-align:right}.brain-stage{position:relative;width:100%;height:100%;overflow:hidden}.brain-canvas{position:absolute;inset:0;z-index:1}.brain-canvas canvas{display:block;touch-action:none}.brain-poster{position:absolute;width:100%;height:100%;object-fit:contain;padding:35px;opacity:.12}.brain-canvas:has(canvas)~.brain-poster{display:none}.orientation{position:absolute;bottom:90px;left:36px;font-size:.65rem;letter-spacing:.15em;color:#7e8575}.orientation span{padding:0 .5rem}.stage-status{position:absolute;z-index:3;bottom:125px;left:30px;right:30px;text-align:center;font-size:.875rem;background:#f3f1eadd;padding:10px}.stage-status button{margin-left:12px}.stage-footer{position:absolute;bottom:28px;left:36px;right:30px;z-index:3;display:flex;align-items:center;justify-content:space-between;gap:1rem}.stage-footer>span{font-size:.7rem;color:var(--muted)}.segmented{display:inline-flex;gap:0;border:1px solid #bbc4b8;border-radius:30px;padding:3px;background:#f8f8ef;max-width:100%}.segmented button{border:0;border-radius:30px;font-size:.8rem;padding:.55rem .9rem;white-space:nowrap}.segmented button[aria-pressed=true]{background:var(--ink);color:var(--white)}.home-narrative{background:var(--white)}.intro{min-height:calc(100vh - 94px);padding:14vh 4.8vw 4rem;position:relative;display:flex;align-items:flex-start;flex-direction:column}.intro h1{font-size:clamp(3.2rem,4.8vw,5.4rem);margin:2rem 0}.intro .dek{max-width:29rem;font-size:1rem}.text-link{display:inline-flex;align-items:center;justify-content:space-between;gap:2rem;border-bottom:1px solid #819080;padding:.9rem 0;font-size:.9rem;margin-top:1.6rem}.text-link span{font-size:1.6rem}.scroll-cue{display:flex;align-items:center;gap:2rem;margin-top:auto;padding-top:3rem;font-size:.76rem;color:var(--muted)}.scroll-cue span{font-size:1.4rem}.directory{padding:3.5rem 4.8vw;border-top:1px solid var(--line);scroll-margin-top:30px}.section-heading{display:flex;justify-content:space-between;align-items:center;padding-bottom:1rem;border-bottom:1px solid var(--line)}.section-heading>span{font-size:.75rem;color:var(--muted)}.chapter-group{margin:3rem 0 4.5rem}.chapter-group h2{font-size:2rem;margin-bottom:1.4rem;display:flex;gap:.85rem}.chapter-group h2>span{font:400 .7rem DM Sans,sans-serif;color:var(--accent);padding-top:8px}.chapter-row{display:grid;grid-template-columns:30px 1fr 15px;gap:.7rem;align-items:center;padding:1rem 0;border-bottom:1px solid var(--line);font-size:.98rem;line-height:1.45;transition:color .2s}.chapter-row:hover,.chapter-row.active{color:var(--accent)}.chapter-number{font-size:.7rem;color:#7f897f}.chapter-row small{display:block;margin-top:.25rem;color:#737d73;font-size:.66rem}.closing{padding:4rem 4.8vw 7rem;background:#e8ece2}.closing h2{font-size:3.5rem;margin:1.6rem 0}.closing p:not(.eyebrow){font-size:.95rem}.region-card{position:absolute;left:8%;right:8%;bottom:110px;z-index:5;padding:1.1rem;background:#fcfbf5f0;border:1px solid var(--line);box-shadow:0 12px 40px #253b3410}.region-card button{float:right;border:0;padding:.1rem .5rem}.region-card b{display:block;font-size:.9rem}.region-card a{display:block;font-size:.8rem;margin-top:.5rem}.chapter{display:grid;grid-template-columns:49% 51%;background:var(--white)}.reader-stage{position:sticky;top:0;height:100vh;background:var(--paper);border-right:1px solid var(--line)}.reader-stage .brain-stage{height:76%}.reader-stage .orientation{bottom:20px}.reader-stage-controls{position:absolute;bottom:20px;left:30px;right:30px;z-index:3}.reader-stage-controls>p{font-size:.76rem;line-height:1.5;margin:.8rem 0;color:var(--muted);max-width:40rem}.reader-stage-controls>a,.reader-stage-controls>.quiet{font-size:.73rem;margin-right:1.2rem}.quiet{border:0;padding:.5rem 0;text-decoration:underline}.timeline{display:flex;align-items:center;gap:1rem}.timeline button{font-size:.8rem;padding:.4rem .8rem}.timeline>span{font-size:.75rem;white-space:nowrap;font-variant-numeric:tabular-nums}.chapter-body{padding:5rem 5vw 0;min-width:0}.chapter-title h1{font-size:clamp(3.3rem,4.7vw,5.8rem);margin:2.1rem 0}.draft-label{display:inline-block;margin:1.4rem 0;color:var(--accent);font-size:.73rem}.section-links{display:flex;flex-direction:column;border-top:1px solid var(--line);margin:1.5rem 0 4rem}.section-links a{padding:.7rem 0;border-bottom:1px solid var(--line);font-size:.85rem}.reading-section{position:relative;padding:2.5rem 0 3.5rem;border-top:1px solid var(--line);scroll-margin-top:30px}.section-index{font-size:.72rem;color:var(--accent);display:block;margin-bottom:1.2rem}.reading-section h2{margin-bottom:1.6rem;font-size:2.75rem}.reading-section>p{margin:1.2rem 0;font-size:1rem}.book-figure{margin:2rem -1.5rem}.book-figure img{width:100%;max-height:440px;object-fit:contain;background:var(--paper);padding:1.6rem}.book-figure figcaption,.classical-diagram figcaption{font-size:.76rem;line-height:1.65;padding:1rem 1.5rem;color:var(--muted)}.book-figure figcaption span{color:var(--ink)}.book-figure figcaption a{text-decoration:underline}.classical-diagram{margin:1.5rem 0;background:var(--paper)}.classical-diagram svg{width:100%;overflow:visible;padding:1rem .3rem}.references{padding:2rem 0;border-top:1px solid var(--line)}.references a{display:block;font-size:.85rem;margin:1rem 0;line-height:1.5;text-decoration:underline;text-underline-offset:3px}.authoring{border-top:1px solid var(--line);border-bottom:1px solid var(--line);padding:1.3rem 0;margin:2rem 0;font-size:.875rem}.authoring summary{cursor:pointer}.authoring p{margin:1rem 0}.inline-controls{display:flex;gap:.65rem;align-items:center;flex-wrap:wrap}.inline-controls button,.file-button{font-size:.8rem}.file-button{border:1px solid var(--line);padding:.65rem;cursor:pointer}.file-button input{display:none}.next-chapter{padding:4rem 0}.next-chapter h2{font-size:2.5rem;margin-top:1rem}.neuron-applet{background:#1b302a;color:#e1eadf;padding:1.5rem;margin:2rem -1rem}.neuron-canvas{height:330px}.neuron-canvas canvas{display:block}.neuron-applet .caption{font-size:.7rem}.neuron-applet svg{width:100%;margin:1rem 0}.neuron-applet button{color:#d5eadb;border-color:#63766b}.neuron-applet button:hover{background:#31483b}.neuron-applet input{accent-color:#bbd9b8}.neuron-applet small{color:#b7c9bb;display:block;margin-top:1rem}.wide{max-width:1550px;margin:auto;padding:4.5rem 5vw 6rem}.wide h1{margin:1.8rem 0 1.6rem;font-size:clamp(3.5rem,5.3vw,6rem)}.wide>.dek{margin-bottom:3rem}.appendix-grid{display:grid;grid-template-columns:1fr 1.1fr;border-top:1px solid var(--line);border-bottom:1px solid var(--line);margin-top:2rem}.appendix-brain{height:550px;background:var(--paper);position:relative}.appendix-brain>.segmented{position:absolute;bottom:20px;left:25px;z-index:3}.mri-tool{padding:1.6rem;background:#18231f;color:#e0e6dc;display:grid;grid-template-columns:1.2fr 1fr;gap:1.4rem;align-items:center}.mri-image{position:relative;padding:1.3rem}.mri-image canvas{width:100%;display:block;cursor:crosshair;image-rendering:auto}.mri-image p{position:absolute;inset:30% 10%;font-size:.8rem;text-align:center}.edge{position:absolute;font-size:.75rem;color:#bbcdbf}.edge.top{top:0;left:50%}.edge.bottom{bottom:0;left:50%}.edge.left{top:48%;left:0}.edge.right{top:48%;right:0}.mri-controls label{font-size:.8rem;margin-bottom:1.5rem}.mri-controls input{accent-color:#b5c3a7}.mri-controls select{background:#25352d;border-color:#5d6b60;color:#eee}.mri-controls p{font-size:.76rem;margin:1rem 0}.mri-controls small{color:#aebeb3;font-size:.72rem;display:block}.anatomy-controls{display:grid;grid-template-columns:1.4fr 1fr 1fr;gap:2rem;margin:2rem 0}.editorial-note{padding:1rem;border-left:2px solid #c2a36c;background:#f0eee3;font-size:.85rem!important;line-height:1.65}.source-note{font-size:.8rem;color:var(--muted);margin:2rem 0}.source-note a{text-decoration:underline}.region-reading{padding:2rem 0}.region-reading p{font-size:.85rem;margin:.6rem 0}.related-chapters{display:flex;flex-wrap:wrap;gap:.6rem}.related-chapters a{border-bottom:1px solid var(--line);padding:.5rem;font-size:.8rem}.asset-grid{display:grid;grid-template-columns:1fr 1fr;gap:4rem 2.5rem}.asset-card{scroll-margin-top:30px;border-top:1px solid var(--line)}.asset-card>a{display:block;background:var(--paper)}.asset-card img{width:100%;height:330px;object-fit:contain;padding:1.5rem}.asset-card>div{padding:1.5rem 0}.asset-card h2{font-size:2.7rem;margin:.8rem 0}.asset-card p{font-size:.9rem}.asset-card .eyebrow{font-size:.7rem}.asset-card .asset-license{color:var(--muted);font-size:.75rem;margin-top:1rem}.asset-downloads{display:flex;flex-wrap:wrap;gap:1rem;margin:1.5rem 0}.asset-downloads a{font-size:.8rem;border-bottom:1px solid #869681;padding-bottom:.4rem}.asset-card details{font-size:.85rem;line-height:1.7}.asset-card details p{margin:.7rem 0;font-size:.8rem}.library-workflow{border-top:1px solid var(--line);margin-top:3rem;padding-top:3rem;max-width:45rem}.library-workflow h2{font-size:3.8rem}.library-workflow p{margin:1.5rem 0}.library-workflow a{text-decoration:underline;font-size:.875rem}.site-footer{margin-left:var(--rail);padding:2rem 4vw;display:flex;justify-content:space-between;gap:1rem;border-top:1px solid var(--line);font-size:.75rem;color:var(--muted)}.chapter-drawer{position:fixed;z-index:35;top:0;bottom:0;left:var(--rail);width:min(450px,calc(100vw - var(--rail)));overflow:auto;background:var(--white);box-shadow:10px 0 50px #1233;padding:2rem}.chapter-drawer>button{margin-bottom:2rem}.chapter-drawer>a{display:flex;gap:1rem;padding:.9rem 0;border-bottom:1px solid var(--line);font-size:.9rem}.chapter-drawer>a span{color:var(--accent);font-size:.75rem}.load-error{padding:1rem;background:#ece2c8;font-size:.875rem;grid-column:1/-1}@media (min-width:1600px){.home-stage .brain-stage{padding:2rem}.intro{padding-top:16vh}}@media (max-width:1100px){:root{--rail:58px}.topbar{height:80px;padding:0 3vw}.home{grid-template-columns:48% 52%}.intro{padding:9vh 3.5vw 3rem}.intro h1{font-size:3.6rem}.stage-footer{left:20px;right:20px;flex-wrap:wrap}.stage-footer>span{display:none}.plate-label{left:20px;right:20px;font-size:.6rem}.chapter{grid-template-columns:44% 56%}.chapter-body{padding:3.5rem 3.5vw 0}.mri-tool{grid-template-columns:1fr}.mri-image{max-width:290px;margin:auto}.mri-controls{display:grid;grid-template-columns:1fr 1fr;gap:0 1rem}.mri-controls>p,.mri-controls>small{grid-column:1/-1}.mri-controls label{margin-bottom:.6rem}.appendix-brain{height:640px}.topbar nav{gap:1.3rem}.book-figure{margin:2rem 0}}@media (max-width:760px){:root{--rail:0px}.rail{width:48px;height:72px;bottom:auto;background:var(--white);color:var(--ink);border:0}.brand-mark,.rail-word,.rail-bottom{display:none}.menu-button{margin:15px 0}.topbar{height:72px;padding:0 18px 0 56px}.wordmark{font-size:1rem}.wordmark span{font-size:.5rem}.topbar nav{gap:.75rem;font-size:.73rem}.topbar nav a:first-child{display:none}.home{display:flex;flex-direction:column}.home-stage{width:100%;height:52vh;min-height:330px;position:relative;order:0;border-right:0;border-bottom:1px solid var(--line)}.plate-label{top:20px}.home-stage .brain-stage{height:100%}.home-stage .orientation{bottom:25px;left:auto;right:20px}.stage-footer{bottom:16px}.intro{min-height:0;padding:3.5rem 7vw 3rem}.intro h1{font-size:clamp(3.3rem,11vw,5.2rem);margin:1.4rem 0}.intro .dek{font-size:1rem}.intro .scroll-cue{padding-top:2rem}.directory{padding:3rem 7vw}.chapter-group h2{font-size:2rem}.closing{padding:3rem 7vw}.closing h2{font-size:3.3rem}.chapter{display:block}.reader-stage{height:42vh;min-height:310px;position:relative;top:auto;border:0;border-bottom:1px solid var(--line)}.reader-stage .brain-stage{height:100%;width:60%}.reader-stage-controls{left:auto;width:38%;right:12px;bottom:16px}.reader-stage-controls>p{display:none}.reader-stage-controls .segmented button{font-size:.69rem;padding:.4rem .5rem}.reader-stage-controls .timeline{gap:.35rem;margin-top:.8rem}.timeline>span{display:none}.reader-stage-controls>a{display:block}.reader-stage .plate-label{font-size:.56rem}.reader-stage .orientation{display:none}.chapter-body{padding:3rem 7vw 0}.chapter-title h1{font-size:3.4rem}.reading-section h2{font-size:2.5rem}.book-figure{margin:1.5rem -3vw}.reading-section{padding:2rem 0}.wide{padding:3rem 7vw}.wide h1{font-size:3.4rem}.appendix-grid{display:block}.appendix-brain{height:400px}.mri-tool{grid-template-columns:1fr;gap:1rem}.mri-controls{grid-template-columns:1fr 1fr}.mri-image{width:100%;max-width:340px}.anatomy-controls{grid-template-columns:1fr;gap:1rem}.asset-grid{grid-template-columns:1fr;gap:2rem}.asset-card img{height:290px}.site-footer{padding:1.5rem 7vw;flex-wrap:wrap}.chapter-drawer{left:0;width:100%}.neuron-canvas{height:270px}.library-workflow h2{font-size:3rem}.region-card{bottom:60px}.home-narrative{width:100%}}@media (prefers-reduced-motion:reduce){*{scroll-behavior:auto!important;transition:none!important}.brain-canvas{animation:none!important}}@media print{.rail,.topbar,.reader-stage,.site-footer,.authoring{display:none}.page{margin:0}.chapter{display:block}.chapter-body{padding:0;max-width:700px;margin:auto}.reading-section{break-inside:avoid}}.asset-preview{position:relative;min-width:0}.asset-preview img{display:block;width:100%;object-fit:contain}.asset-canvas{width:100%;height:clamp(260px,38vw,520px);touch-action:none}.asset-canvas canvas{display:block}.asset-preview-controls{display:flex;gap:.65rem;justify-content:center;padding:.65rem}.asset-preview-controls button{font:inherit;font-size:.875rem;border:1px solid currentColor;background:transparent;padding:.5rem .9rem;border-radius:3px;cursor:pointer}.asset-preview-controls button:focus-visible{outline:3px solid #23768a;outline-offset:3px}.asset-preview-status{font-size:.875rem;text-align:center;margin:.3rem 1rem}.theme-toggle{font-size:.78rem;white-space:nowrap;padding:.4rem .65rem}:root[data-theme=dark]{color-scheme:dark;--paper:#152320;--white:#0c1715;--ink:#e5ede5;--muted:#a9bcb0;--line:#384b43;--accent:#e0ba78}:root[data-theme=dark] .dek,:root[data-theme=dark] .caption,:root[data-theme=dark] .source-note,:root[data-theme=dark] .editorial-note{color:var(--muted)}:root[data-theme=dark] h1 em,:root[data-theme=dark] h2 em{color:#d5bb8a}:root[data-theme=dark] button:hover{background:#304339}:root[data-theme=dark] .home-stage,:root[data-theme=dark] .reader-stage,:root[data-theme=dark] .appendix-brain,:root[data-theme=dark] .asset-card,:root[data-theme=dark] .book-figure,:root[data-theme=dark] .chapter-drawer,:root[data-theme=dark] .region-card,:root[data-theme=dark] .authoring,:root[data-theme=dark] .editorial-note,:root[data-theme=dark] .load-error{background:var(--paper);color:var(--ink)}:root[data-theme=dark] .segmented button[aria-pressed=true]{background:#d6e1d6;color:#172b22}:root[data-theme=dark] .segmented{background:var(--paper);border-color:var(--line)}:root[data-theme=dark] .chapter-row:hover,:root[data-theme=dark] .chapter-row.active{background:#263b30}:root[data-theme=dark] input,:root[data-theme=dark] select{color:var(--ink)}.brain-tools{font-size:.72rem;display:flex;align-items:center;gap:.5rem;flex-wrap:wrap;max-width:100%}.brain-tools label{font-size:.72rem;display:flex;align-items:center;gap:.25rem}.brain-tools input[type=range]{width:65px;margin:.3rem 0}.brain-tools a{font-size:.7rem}.appendix-brain>.brain-tools{position:absolute;bottom:65px;left:25px;right:15px;z-index:3}:root[data-theme=dark] .stage-status{background:#152320ee;color:var(--ink)}:root[data-theme=dark] .plate-label,:root[data-theme=dark] .orientation,:root[data-theme=dark] .chapter-number,:root[data-theme=dark] .draft-label{color:var(--muted)}:root[data-theme=dark] .region-card,:root[data-theme=dark] .reader-stage-controls{color:var(--ink)}:root[data-theme=dark] .skip-link{background:var(--accent);color:#172b22}.linked-mri{min-width:0;padding:1rem}.linked-mri-planes{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:.6rem}.linked-mri figure{margin:0;min-width:0}.linked-mri canvas{width:100%;background:#000;display:block;cursor:crosshair}.linked-mri figcaption{font-size:.72rem;text-transform:capitalize}.linked-mri label{font-size:.75rem}.linked-mri p{font-size:.8rem}.neuron-canvas{position:relative;overflow:hidden;background:#030b11;min-height:340px}.neuron-canvas canvas{position:relative;z-index:1}.neuron-canvas .cursor-glow{position:absolute;width:90px;height:90px;background:radial-gradient(circle,#87d4ff25,transparent 65%);border-radius:50%;pointer-events:none;z-index:2;opacity:0}.neuron-bounds{display:grid;grid-template-columns:1fr 1fr;gap:1rem}.non-neuronal-examples figure{margin:1.5rem 0}.non-neuronal-examples figcaption{font-size:.85rem;line-height:1.6}.non-neuronal-examples h3{font-size:2rem}@media (max-width:760px){.theme-toggle{font-size:.66rem}.topbar nav{gap:.5rem}.brain-tools input[type=range]{width:38px}.linked-mri-planes{grid-template-columns:1fr}.linked-mri canvas{max-width:320px;margin:auto}.linked-mri figure{max-width:360px;width:100%;margin:auto}.neuron-bounds{grid-template-columns:1fr}.stage-footer{flex-wrap:wrap;gap:.5rem}.reader-stage-controls .brain-tools a{display:none}}