body:has(.book-page){background:#eae5dc;color:#252d2b}.book-page{--paper:#f8f5ef;--ink:#242e2c;--sub:#646c65;--accent:#934e3c;--line:#d7d0c5;--body-size:19px;max-width:1260px;margin:0 auto;background:var(--paper);color:var(--ink);padding:48px clamp(20px,4vw,60px);font-family:Arial,sans-serif;min-height:65vh}.book-page a{color:var(--accent)}.book-page h1,.book-page h2,.book-page h3{color:var(--ink);font-family:Georgia,'Times New Roman',serif;letter-spacing:-.035em}.book-page h1{font-size:clamp(38px,5.2vw,70px);line-height:1.05;font-weight:400;margin:18px 0 22px}.book-page p{color:var(--sub);line-height:1.8}.book-kicker{font-size:10px;letter-spacing:2px;font-weight:700;color:var(--accent);text-transform:uppercase}.library-intro{max-width:900px;padding:20px 0 50px}.library-intro>p{font-size:19px;max-width:580px}.book-feature{display:grid;grid-template-columns:340px 1fr;gap:80px;align-items:center;padding:35px 0 60px;border-top:1px solid var(--line)}.book-cover{display:flex;flex-direction:column;gap:18px;text-decoration:none;padding:28px 24px;background:#e1dacb;color:#233c33!important;border-left:12px solid #2d463b;box-shadow:12px 15px 28px #28382e25,2px 0 0 #a7987b;transform:perspective(1000px) rotateY(-9deg);min-height:440px}.book-cover>span{font:10px Arial,sans-serif;letter-spacing:2px}.book-cover h2{font:400 36px/1.05 Georgia,serif;margin:8px 0}.book-cover img{width:100%;height:auto;mix-blend-mode:multiply}.book-cover small{font:italic 15px/1.5 Georgia,serif}.book-feature-copy h2{font-size:38px;font-weight:400;margin:20px 0}.book-feature-copy>p{max-width:600px}.book-facts{display:flex;gap:20px;font-size:12px;color:var(--sub);margin:22px 0}.book-actions{display:flex;flex-wrap:wrap;gap:16px;align-items:center;margin:25px 0}.book-actions a{padding:12px 18px;text-decoration:none;border:1px solid var(--line);border-radius:4px;font-size:13px}.book-actions .book-primary{background:#2e493d;color:#fff9ec;border-color:#2e493d}.book-edition{font-size:11px;line-height:1.7!important;color:var(--sub)!important}.book-breadcrumb{display:flex;justify-content:space-between;gap:20px;margin-bottom:35px;font-size:12px}.book-breadcrumb a{text-decoration:none}.contents-hero{display:grid;grid-template-columns:1.4fr 1fr;gap:60px;align-items:center;padding-bottom:35px}.contents-hero h1{font-size:clamp(38px,5vw,64px)}.contents-photo{width:100%;height:auto;border-radius:3px;mix-blend-mode:multiply}.book-author{display:flex;align-items:center;gap:14px;font-size:13px;line-height:1.6;margin:22px 0}.book-author img,.chapter-byline img{width:52px;height:52px;object-fit:cover;border-radius:50%;border:1px solid var(--line);filter:grayscale(1)}.book-author small{color:var(--sub);font-size:11px}.editor-note{border-left:3px solid var(--accent);background:#e9e2d6;padding:18px 24px;font-size:12px;margin:22px 0 40px}.editor-note p{margin-bottom:0}.contents-tools{display:flex;align-items:center;gap:16px;flex-wrap:wrap;padding:15px 0;border-bottom:1px solid var(--line)}.contents-tools h2{font-size:32px;font-weight:400;margin:0 auto 0 0}.contents-tools label{font-size:11px}.contents-tools input{padding:11px;background:var(--paper);color:var(--ink);border:1px solid var(--line);border-radius:4px;font-size:13px;max-width:100%}.chapter-index{display:grid;grid-template-columns:1fr 1fr;gap:40px}.contents-part{margin-top:35px}.contents-part h2{font-size:27px;font-weight:400;margin:13px 0 20px}.contents-part ol{list-style:none;padding:0;margin:0}.contents-part li{border-top:1px solid var(--line)}.contents-part li a{display:grid;grid-template-columns:28px 1fr auto;gap:12px;padding:15px 0;text-decoration:none;align-items:baseline}.contents-part li span{font:11px monospace;color:var(--sub)}.contents-part li b{font-size:14px;line-height:1.5;font-weight:400;color:var(--ink)}.contents-part li small{font-size:10px;color:var(--sub);white-space:nowrap}.contents-part li a:hover b{text-decoration:underline}.reader-layout{display:grid;grid-template-columns:235px minmax(0,1fr);gap:65px}.reader-sidebar{position:sticky;top:100px;align-self:start;max-height:calc(100vh - 130px);overflow:auto;padding-right:16px;border-right:1px solid var(--line);scrollbar-width:thin}.reader-book-name{font:20px/1.2 Georgia,serif;text-decoration:none}.reader-sidebar>p{font-size:10px;margin-bottom:20px}.reader-sidebar nav{display:grid;gap:3px}.reader-sidebar nav a{display:flex;gap:10px;padding:8px 5px;text-decoration:none;font-size:10px;line-height:1.5;color:var(--sub)}.reader-sidebar nav span{font:9px monospace;color:var(--accent)}.reader-sidebar nav [aria-current=page]{color:var(--accent);font-weight:bold;background:#e6dfd2;border-left:2px solid var(--accent)}.reader-main{min-width:0;max-width:780px}.chapter-heading h1{font-size:clamp(33px,4.5vw,58px);font-weight:400;margin-bottom:25px}.chapter-byline{display:flex;gap:12px;align-items:center;color:var(--sub);font-size:11px;flex-wrap:wrap}.chapter-byline img{width:40px;height:40px}.chapter-byline button{margin-left:auto}.book-page button{border:1px solid var(--line);background:transparent;color:var(--ink);padding:8px 12px;border-radius:4px;font-size:11px;cursor:pointer}.reader-tools{display:flex;align-items:center;gap:7px;flex-wrap:wrap;padding:18px 0;margin:18px 0 25px;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}.reader-tools [aria-pressed=true]{background:#2e493d;color:#fff7e7;border-color:#2e493d}#reader-feedback{font-size:10px;color:var(--sub)}.chapter-prose{font-family:Georgia,'Times New Roman',serif;font-size:var(--body-size);line-height:1.9;color:var(--ink)}.chapter-prose p{font:inherit;line-height:1.9;color:inherit;margin:0 0 1.3em;overflow-wrap:break-word;hyphens:auto}.chapter-prose>p:first-child:first-letter{float:left;font-size:3.6em;line-height:.85;padding:8px 9px 0 0;color:var(--accent)}.chapter-gallery{display:grid;grid-template-columns:repeat(auto-fit,minmax(230px,1fr));gap:20px;margin:35px 0}.chapter-gallery figure{margin:0;padding:12px;background:#fffdf8;border:1px solid var(--line);box-shadow:0 5px 16px #28382e0b}.chapter-gallery img{width:100%;max-height:420px;object-fit:contain;display:block}.chapter-gallery figcaption{font-size:10px;line-height:1.6;color:var(--sub);padding:10px 5px 0}.book-visual{border:1px solid var(--line);background:#ece8de;border-radius:7px;padding:25px;margin:35px 0}.book-visual h2{font-weight:400;font-size:25px;margin:0 0 25px}.book-visual>small{display:block;margin-top:18px;color:var(--sub);font-size:10px}.journey-map{list-style:none;display:grid;grid-template-columns:repeat(4,1fr);gap:10px;margin:0;padding:0}.journey-map li{position:relative;border-top:3px solid #a27454;padding-top:15px}.journey-map li:before{content:'';position:absolute;left:0;top:-6px;width:10px;height:10px;border-radius:50%;background:var(--accent)}.journey-map b{display:block;font-size:12px}.journey-map span{display:block;font-size:10px;color:var(--sub);line-height:1.5;margin-top:7px}.technology-map,.principle-map{display:grid;grid-template-columns:1fr 1fr;gap:12px}.technology-map>div,.principle-map>span{padding:17px;background:#f8f5ef;border-left:3px solid #628170;font-size:13px;line-height:1.5}.technology-map b{display:block;color:var(--accent);font-size:14px}.technology-map span{display:block;color:var(--sub);font-size:11px;margin-top:7px}.book-visual>p{font-size:12px;margin-bottom:0}.chapter-reflection{padding:25px 0 10px;border-top:1px solid var(--line);margin-top:35px}.chapter-reflection p{font:italic 19px/1.6 Georgia,serif;color:var(--ink)}.chapter-navigation{display:grid;grid-template-columns:1fr 1fr;gap:15px;padding:20px 0 28px}.chapter-navigation a{border:1px solid var(--line);padding:18px;text-decoration:none}.chapter-navigation small{display:block;font-size:10px;color:var(--sub);margin-bottom:8px}.chapter-navigation b{font:400 18px/1.3 Georgia,serif;color:var(--accent)}.book-references{padding:16px;border:1px dashed var(--line);margin:25px 0;font-size:12px}.book-references summary{cursor:pointer;color:var(--sub);margin-bottom:7px}.reading-progress{position:fixed;left:0;top:0;right:0;height:4px;z-index:100;pointer-events:none}.reading-progress i{display:block;width:0;height:100%;background:#ad6947}.book-page[data-theme=night]{--paper:#192622;--ink:#e9e4d8;--sub:#b4bdb3;--accent:#e3bb90;--line:#47574a}.book-page[data-theme=night] .book-visual,.book-page[data-theme=night] .editor-note{background:#26372f}.book-page[data-theme=night] .technology-map>div,.book-page[data-theme=night] .principle-map>span{background:#1d2b24}.book-page[data-theme=night] .reader-sidebar nav [aria-current=page]{background:#2c3f32}.book-page a:focus-visible,.book-page button:focus-visible,.book-page input:focus-visible{outline:3px solid var(--accent);outline-offset:3px}.book-page [hidden]{display:none!important}@media(max-width:1000px){.reader-layout{grid-template-columns:175px 1fr;gap:30px}.book-feature{grid-template-columns:290px 1fr;gap:40px}.contents-hero{gap:30px}.book-page{padding:35px 25px}}@media(max-width:760px){.reader-layout{grid-template-columns:1fr}.reader-sidebar{display:none}.book-feature{grid-template-columns:1fr;gap:35px}.book-cover{max-width:330px;min-height:400px;margin:auto;transform:none}.book-feature-copy h2{font-size:30px}.contents-hero{grid-template-columns:1fr;gap:25px}.contents-photo{max-height:260px;object-fit:contain}.chapter-index{grid-template-columns:1fr;gap:0}.book-page{padding:25px 18px}.library-intro{padding-bottom:30px}.journey-map{grid-template-columns:1fr 1fr;gap:22px}.book-breadcrumb{font-size:10px;line-height:1.6;gap:15px}.reader-tools button{padding:8px;font-size:10px}.chapter-navigation{gap:10px}.chapter-navigation a{padding:12px}.chapter-navigation b{font-size:16px}.book-visual{padding:18px}.technology-map,.principle-map{gap:8px}.technology-map>div,.principle-map>span{padding:12px}.book-facts{font-size:11px;gap:13px}.chapter-gallery{grid-template-columns:1fr}}@media print{.header,footer,.reader-sidebar,.reader-tools,.chapter-byline button,.book-breadcrumb,.chapter-navigation,.reading-progress{display:none!important}.book-page{padding:0;max-width:none;background:#fff;color:#111}.reader-layout{display:block}.reader-main{max-width:none}.chapter-prose{font-size:12pt}.book-visual,.chapter-gallery figure{break-inside:avoid}}