:root { --fbos2-ink:#242923; --fbos2-muted:#626a64; --fbos2-paper:#f7f6f1; --fbos2-cream:#edece3; --fbos2-line:#dddcd3; --fbos2-accent:#a65f39; --fbos2-accent-dark:#824527; --fbos2-forest:#193f3a; }
body.fbos2-site {margin:0 !important;background:var(--fbos2-paper)!important;color:var(--fbos2-ink)!important;font-family:system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif!important;font-size:16px;line-height:1.6}
.fbos2-shell, .fbos2-shell * {box-sizing:border-box}
.fbos2-shell {min-height:100vh;background:var(--fbos2-paper);color:var(--fbos2-ink)}
.fbos2-shell :is(h1,h2,h3,p,ul){margin-top:0}
.fbos2-shell h1,.fbos2-shell h2,.fbos2-shell h3{line-height:1.16;font-weight:650;letter-spacing:-.035em;color:inherit}
.fbos2-shell :is(a,button,input,select){font:inherit}
.fbos2-shell a{text-decoration:none;color:inherit}
.fbos2-shell :focus-visible{outline:3px solid #da8753;outline-offset:4px}
.fbos2-skip{position:absolute;top:-100px;left:12px;padding:14px;background:#fff;z-index:5000}
.fbos2-skip:focus{top:12px}
.fbos2-header{position:sticky;top:0;z-index:50;background:rgba(248,247,243,.97);backdrop-filter:blur(8px);border-bottom:1px solid var(--fbos2-line)}
.fbos2-nav-inner{min-height:80px;max-width:1320px;padding:0 32px;margin:auto;display:flex;justify-content:space-between;gap:34px;align-items:center}
.fbos2-logo{display:inline-flex;align-items:center;gap:11px;white-space:nowrap;font-size:25px;letter-spacing:-.06em;font-weight:760;line-height:1}
.fbos2-logo small{font-weight:400;letter-spacing:0;font-size:.65em}
.fbos2-mark{display:flex;width:39px;height:39px;align-items:center;justify-content:center;background:var(--fbos2-forest);color:#fff;font-family:Georgia,serif;font-size:27px;font-weight:700;border-radius:12px}
.fbos2-mark span{color:#e2b17e}
.fbos2-nav{display:flex;gap:34px;align-items:center;font-size:14px;font-weight:590}
.fbos2-nav a:hover,.fbos2-text-link:hover{color:var(--fbos2-accent-dark)}
.fbos2-top-action{background:var(--fbos2-forest);color:#fff!important;border-radius:99px;padding:11px 20px;font-weight:650;font-size:13px}
.fbos2-top-action span{padding-left:12px}
.fbos2-main{padding:0;min-height:70vh}
.fbos2-hero{background:var(--fbos2-forest);color:#f8f5ec;padding:95px 32px 100px;background-image:radial-gradient(circle at 82% 24%,rgba(210,175,127,.15),transparent 35%)}
.fbos2-hero-inside{max-width:1250px;margin:auto;display:grid;grid-template-columns:minmax(0,1.4fr) minmax(250px,.6fr);gap:80px;align-items:center}
.fbos2-hero-label,.fbos2-eyebrow{display:block;color:var(--fbos2-accent);font-weight:760;font-size:11px;letter-spacing:.14em;text-transform:uppercase;margin:0 0 18px}
.fbos2-hero-label{color:#d4b084}
.fbos2-hero h1{font:normal 700 clamp(42px,5.3vw,83px)/1.07 Georgia,serif;letter-spacing:-.055em;color:#fcfaf3;margin:0 0 30px}
.fbos2-hero h1 em{color:#e6c49b;font-weight:400}
.fbos2-hero p{max-width:630px;line-height:1.9;font-size:17px;color:#d9e1db;margin-bottom:28px}
.fbos2-hero-buttons,.fbos2-actions{display:flex;flex-wrap:wrap;gap:12px;align-items:center}
.fbos2-button{background:var(--fbos2-accent);color:#fff!important;border:none;border-radius:99px;display:inline-flex;gap:18px;align-items:center;justify-content:center;padding:14px 22px;font-size:14px;font-weight:700;cursor:pointer;white-space:normal}
.fbos2-button:hover{background:var(--fbos2-accent-dark);color:#fff!important}
.fbos2-button.fbos2-outline{background:transparent;color:inherit!important;border:1px solid currentColor}
.fbos2-hero .fbos2-outline{color:#fff!important;border:1px solid rgba(255,255,255,.5)}
.fbos2-hero-quote{border-left:1px solid rgba(236,223,202,.25);padding:36px 0 36px 40px}
.fbos2-hero-quote>span{font:100px/.8 Georgia,serif;color:#d4b084}
.fbos2-hero-quote blockquote{margin:0 0 22px;font:italic clamp(20px,2vw,29px)/1.5 Georgia,serif;color:#e5e6d8}
.fbos2-hero-quote p{font-size:10px;letter-spacing:.2em;margin:0;color:#caaf89}
.fbos2-section{max-width:1300px;margin:0 auto;padding:76px 32px}
.fbos2-section-header{display:flex;justify-content:space-between;align-items:end;gap:30px;margin-bottom:36px}
.fbos2-section-header h2,.fbos2-panel h2,.fbos2-reading-info h2{font:600 clamp(28px,3vw,42px)/1.2 Georgia,serif;letter-spacing:-.025em;margin:0 0 12px}
.fbos2-section-header p{max-width:730px;color:var(--fbos2-muted);margin-bottom:0}
.fbos2-text-link,.fbos2-link{color:var(--fbos2-forest)!important;font-weight:750;font-size:13px;white-space:normal}
.fbos2-book-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:24px}
.fbos2-book-card{min-width:0;background:#fff;border:1px solid #e8e6db;border-radius:12px;overflow:hidden;display:flex;flex-direction:column;box-shadow:0 3px 24px rgba(20,36,30,.03)}
.fbos2-book-card[hidden],.fbos2-free-card[hidden],.fbos2-more[hidden],.fbos2-empty[hidden]{display:none!important}
.fbos2-book-cover{height:255px;display:flex;justify-content:center;align-items:center;background:linear-gradient(150deg,#f2eee5,#e9eae5);padding:24px;overflow:hidden}
.fbos2-cover{display:block;height:100%;max-width:100%;width:auto;object-fit:contain;box-shadow:0 10px 22px rgba(0,0,0,.14)}
.fbos2-cover-fallback{display:flex;align-items:center;font-weight:650;font-family:Georgia,serif;padding:30px;text-align:center}
.fbos2-card-text{display:flex;flex-direction:column;flex:1;padding:23px}
.fbos2-card-text .fbos2-eyebrow{font-size:9.5px;margin-bottom:12px}
.fbos2-card-text h3{font-size:17px;line-height:1.42;letter-spacing:-.018em;margin-bottom:12px}
.fbos2-kind{font-size:12px;color:var(--fbos2-muted);margin-top:auto;margin-bottom:20px}
.fbos2-actions{border-top:1px solid #efeee7;padding-top:17px;justify-content:space-between}
.fbos2-small-link{font-size:12px;color:var(--fbos2-muted)!important}
.fbos2-panel{background:#eae9de;padding:60px max(32px,calc((100% - 1236px)/2));display:grid;grid-template-columns:.65fr 1.35fr;gap:65px}
.fbos2-panel h2{margin-bottom:0}
.fbos2-three{display:grid;grid-template-columns:repeat(3,1fr);gap:32px}
.fbos2-three p{font-size:13px;line-height:1.8;color:#4b514e}
.fbos2-three b{font-size:14px;color:var(--fbos2-ink)}
.fbos2-free-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:21px}
.fbos2-free-card{background:#fff;border:1px solid #e7e6dc;border-radius:12px;padding:22px;display:grid;grid-template-columns:130px minmax(0,1fr);gap:22px;min-height:230px}
.fbos2-free-cover{background:#e8e7df;display:flex;justify-content:center;align-items:center;padding:8px;min-height:184px;border-radius:5px}
.fbos2-free-cover .fbos2-cover{max-height:175px}
.fbos2-free-card .fbos2-eyebrow{font-size:9px;margin-bottom:8px}
.fbos2-free-card h3{font-size:18px;line-height:1.35;letter-spacing:-.015em;margin-bottom:10px}
.fbos2-free-card p{color:var(--fbos2-muted);font-size:13px;line-height:1.7;margin-bottom:15px}
.fbos2-page-intro{padding:78px 32px 58px;background:#eaece4;text-align:center}
.fbos2-page-intro h1{max-width:880px;margin:0 auto 18px;font:600 clamp(35px,4.2vw,60px)/1.1 Georgia,serif;letter-spacing:-.035em}
.fbos2-page-intro p{max-width:800px;color:var(--fbos2-muted);margin:0 auto;font-size:17px;line-height:1.9}
.fbos2-filterbar{display:grid;grid-template-columns:1.3fr 1fr .7fr;gap:20px;background:#fff;border-radius:12px;padding:24px;margin-bottom:14px;border:1px solid var(--fbos2-line)}
.fbos2-filterbar label{display:block;font-size:12px;font-weight:760;color:#4b5a53}
.fbos2-filterbar :is(input,select){width:100%;margin-top:9px;background:#fafaf8;color:#202b26;border:1px solid #d4d9d2;border-radius:7px;padding:13px 14px;font-size:14px}
.fbos2-result-count{font-size:13px;color:var(--fbos2-muted);margin:22px 0}
.fbos2-more{margin:35px auto 0;display:flex}
.fbos2-empty{background:#fff;padding:25px;text-align:center}
.fbos2-detail{max-width:1160px;margin:45px auto;display:grid;grid-template-columns:260px 1fr;gap:60px;padding:40px 32px 50px;align-items:start}
.fbos2-detail-cover{background:#ebe9df;padding:26px;min-height:310px;display:flex;align-items:center;justify-content:center}
.fbos2-detail-cover img{max-height:330px}
.fbos2-detail h1{font:600 clamp(29px,3vw,46px)/1.19 Georgia,serif;letter-spacing:-.03em;margin:0 0 22px}
.fbos2-detail p{color:#626a64;line-height:1.85;margin-bottom:20px}
.fbos2-detail .fbos2-subtitle{font-weight:600;color:#3e5148}
.fbos2-verified{background:#f0eee4;border-left:3px solid #b29068;padding:13px 18px;font-size:13px}
.fbos2-copy{max-width:800px}.fbos2-copy h2{font:600 30px Georgia,serif}.fbos2-copy p{font-size:17px;line-height:1.9}
.fbos2-footer{background:#132f2c;color:#e3e6dc;padding:58px max(32px,calc((100% - 1236px)/2));display:grid;grid-template-columns:1fr .7fr 1fr;gap:35px;font-size:13px}
.fbos2-footer .fbos2-logo{margin-bottom:12px}.fbos2-footer .fbos2-mark{background:#e6c8a0;color:#163833}.fbos2-footer>div:nth-child(2){display:flex;flex-direction:column;gap:12px}.fbos2-footer p{color:#bdc8bd}.fbos2-footer a:hover{color:#f2d5a8}
.fbos2-foot-small{font-size:11px;color:#b3beb6!important}
/* Reader */
.fbos2-reading-box{--fbos2-reader-font:19px;--fbos2-reader-bg:#fff;--fbos2-reader-ink:#26312d;--fbos2-reader-accent:#89603f;max-width:1300px;margin:45px auto 10px;border:1px solid #dfdfd6;border-radius:14px;overflow:hidden;background:#f6f6f2}
.fbos2-reading-box[data-theme="sepia"]{--fbos2-reader-bg:#f4e9d3;--fbos2-reader-ink:#433e31;--fbos2-reader-accent:#966332}
.fbos2-reading-box[data-theme="dark"]{--fbos2-reader-bg:#182623;--fbos2-reader-ink:#e2e7df;--fbos2-reader-accent:#d3b38c}
.fbos2-reader-top{padding:25px 30px;background:#193f3a;color:white;display:flex;justify-content:space-between;gap:20px;align-items:center}
.fbos2-reader-top h2{margin:0;font:600 31px Georgia,serif;color:#fff}
.fbos2-reader-top .fbos2-eyebrow{color:#e0bb8d;margin-bottom:6px}
.fbos2-reader-actions{display:flex;gap:9px;flex-wrap:wrap}
.fbos2-reader-actions button,.fbos2-reader-toolbar button,.fbos2-page-controls button{background:#fff;border:1px solid #cad0c8;border-radius:7px;color:#1f453c;padding:9px 14px;font-size:12px;cursor:pointer;font-weight:750}
.fbos2-reader-actions button:hover,.fbos2-page-controls button:hover{background:#ebeee7}
.fbos2-reader-toolbar{padding:16px 24px;border-bottom:1px solid #dadbd4;display:flex;justify-content:space-between;gap:15px;align-items:end;flex-wrap:wrap;font-size:12px}
.fbos2-reader-toolbar label{display:flex;flex-direction:column;gap:6px;color:#3e5247;font-weight:720}
.fbos2-reader-toolbar input[type="range"]{accent-color:#926741;width:105px}
.fbos2-reader-toolbar :is(input[type="search"],select){border:1px solid #c8d0c6;border-radius:5px;background:#fff;color:#26312d;font-size:12px;padding:6px 10px;max-width:195px}
#fbos2-toc-toggle{display:none}
.fbos2-reader-layout{display:grid;grid-template-columns:250px minmax(0,1fr);align-items:stretch;min-height:450px}
.fbos2-reader-sidebar{background:#e9ece7;padding:22px 12px 22px 22px;border-right:1px solid #d4d9d3;max-height:740px;overflow:auto}
.fbos2-reader-sidebar h3{font-size:15px;margin-bottom:15px}
.fbos2-reader-sidebar nav{display:flex;flex-direction:column;gap:4px}
.fbos2-reader-sidebar button{display:block;text-align:left;border:0;border-radius:4px;background:transparent;color:#47584c;padding:8px 9px;cursor:pointer;font-size:12px;line-height:1.45}
.fbos2-reader-sidebar button:hover{background:#d6ddd4;color:#273e35}
.fbos2-reader-sidebar button[data-level="2"]{padding-left:17px;font-size:11px}
.fbos2-reader-sidebar button[data-level="3"]{padding-left:24px;font-size:10.5px}
.fbos2-reader-main{min-width:0;padding:16px 22px 28px;background:var(--fbos2-reader-bg);color:var(--fbos2-reader-ink)}
.fbos2-reader-progress{display:flex;align-items:center;gap:12px;font-size:12px;margin-bottom:12px;color:var(--fbos2-reader-ink);opacity:.74}
.fbos2-reader-progress progress{flex:1;height:7px;accent-color:var(--fbos2-reader-accent)}
.fbos2-reader-content{max-width:820px;margin:auto;background:var(--fbos2-reader-bg);color:var(--fbos2-reader-ink);font:400 var(--fbos2-reader-font)/1.85 Georgia,"Times New Roman",serif;letter-spacing:0;overflow-wrap:break-word}
.fbos2-reader-page{padding:34px 20px 52px;scroll-margin-top:120px;border-bottom:1px solid color-mix(in srgb,var(--fbos2-reader-ink) 15%,transparent)}
.fbos2-reader-page[hidden]{display:none!important}
.fbos2-reader-page p{font:inherit;margin:0 0 1.05em;max-width:70ch;white-space:normal}
.fbos2-pageno{font:700 10px system-ui,sans-serif;letter-spacing:.19em;color:var(--fbos2-reader-accent);margin-bottom:25px}
.fbos2-page-mode .fbos2-reader-page{border:0;min-height:50vh}
.fbos2-page-controls{display:flex;gap:12px;justify-content:space-between;border-top:1px solid #cdd3cd;padding-top:15px}
.fbos2-reader-footnote{font-size:11px;line-height:1.7;color:#67736c;margin-top:20px}
.fbos2-reader-sidebar #fbos2-find-results{border-top:1px solid #d4d9d3;margin-top:15px;padding-top:15px}
.fbos2-reader-sidebar #fbos2-find-results p{font-size:11px;color:#4a5b50;font-weight:700}
.fbos2-reading-info{max-width:890px;font:17px/1.95 Georgia,serif}
.fbos2-reading-info h2{font-size:31px;margin:35px 0 15px}
.fbos2-reading-info li{margin-bottom:9px}
.fbos2-reading-box:fullscreen{max-width:100vw;max-height:100vh;overflow:auto;border-radius:0;margin:0}
.fbos2-reading-box:fullscreen .fbos2-reader-layout{min-height:80vh}
@media(max-width:1100px){.fbos2-book-grid{grid-template-columns:repeat(3,minmax(0,1fr))}.fbos2-hero-inside{gap:30px}.fbos2-nav{gap:15px}.fbos2-free-card{grid-template-columns:110px minmax(0,1fr)} }
@media(max-width:780px){
 .fbos2-nav-inner{min-height:68px;padding:12px 17px;gap:14px;flex-wrap:wrap}
 .fbos2-logo{font-size:22px}.fbos2-mark{width:35px;height:35px}
 .fbos2-nav{order:3;flex:1 0 100%;display:flex;justify-content:space-between;gap:9px;font-size:12px;padding:5px 0 0;overflow:auto}
 .fbos2-nav a{white-space:nowrap}.fbos2-top-action{display:none}
 .fbos2-hero{padding:65px 22px}.fbos2-hero-inside{grid-template-columns:1fr;gap:35px}.fbos2-hero-quote{padding:0 0 0 22px}.fbos2-hero h1{font-size:clamp(37px,8vw,58px)}
 .fbos2-section{padding:56px 20px}.fbos2-section-header{display:block}.fbos2-section-header a{display:inline-block;margin-top:22px}
 .fbos2-book-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:13px}
 .fbos2-book-cover{height:235px;padding:17px}.fbos2-card-text{padding:16px}.fbos2-card-text h3{font-size:15px}
 .fbos2-panel{display:block;padding:45px 20px}.fbos2-three{margin-top:20px;grid-template-columns:1fr;gap:3px}
 .fbos2-free-grid{grid-template-columns:1fr}.fbos2-free-card{grid-template-columns:110px 1fr}
 .fbos2-page-intro{padding:55px 20px}.fbos2-filterbar{grid-template-columns:1fr;gap:14px;padding:18px}
 .fbos2-footer{grid-template-columns:1fr;padding:45px 20px;gap:20px}
 .fbos2-detail{grid-template-columns:1fr;gap:23px;margin:0;padding:28px 20px}.fbos2-detail-cover{max-width:250px;min-height:280px}
 .fbos2-reading-box{margin:25px 12px}.fbos2-reader-top{padding:18px;display:block}.fbos2-reader-top h2{font-size:25px}.fbos2-reader-actions{margin-top:16px}
 .fbos2-reader-layout{display:block}.fbos2-reader-sidebar{display:none;max-height:330px;border-bottom:1px solid #d4d9d3}.fbos2-reader-sidebar.is-open{display:block}
 #fbos2-toc-toggle{display:block}.fbos2-reader-toolbar{padding:15px;gap:14px;justify-content:start}
 .fbos2-reader-main{padding:14px 8px}.fbos2-reader-page{padding:25px 17px 40px}.fbos2-reader-content{line-height:1.74}
}
@media(max-width:420px){.fbos2-book-grid{grid-template-columns:1fr 1fr;gap:9px}.fbos2-book-cover{height:170px;padding:12px}.fbos2-card-text{padding:12px}.fbos2-card-text h3{font-size:13px}.fbos2-card-text .fbos2-eyebrow{font-size:8px}.fbos2-actions{gap:6px}.fbos2-link{font-size:11px}.fbos2-free-card{grid-template-columns:86px 1fr;padding:12px;gap:13px;min-height:150px}.fbos2-free-cover{min-height:145px}.fbos2-free-card h3{font-size:14px}.fbos2-free-card p{font-size:11px}.fbos2-page-intro h1{font-size:37px}}

.fbos2-free-search-section{margin-top:55px}.fbos2-free-search-section[hidden]{display:none!important}.fbos2-free-search-section h2{font:600 30px Georgia,serif;margin-bottom:24px}

.fbos2-cover-failed{position:relative}.fbos2-cover-failed::after{content:attr(data-fallback);display:block;align-self:center;text-align:center;font:600 14px/1.45 Georgia,serif;padding:15px;color:var(--fbos2-forest)}

.fbos2-related .fbos2-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:24px}
.fbos2-copy a{color:inherit;text-decoration:underline}

/* FlipBook OS 2.1.1 — autorskie opracowania redakcyjne i wygodniejsze czytanie */
.fbos2-editorial{max-width:1020px;margin-top:52px;margin-bottom:52px;background:#fff;border:1px solid #e6e3da;border-radius:14px;padding:clamp(24px,4vw,55px)}
.fbos2-editorial>.fbos2-eyebrow{display:block;color:#9a713c;margin-bottom:17px}
.fbos2-editorial h2{font:600 clamp(28px,3.3vw,42px)/1.18 Georgia,'Times New Roman',serif;color:#23473c;margin:0 0 23px}
.fbos2-editorial h3{font:600 clamp(19px,2.3vw,25px)/1.3 Georgia,'Times New Roman',serif;color:#23473c;margin:0 0 14px}
.fbos2-editorial p{font-size:clamp(15px,1.6vw,17px);line-height:1.9;color:#3a4743;max-width:75ch;margin:0 0 21px}
.fbos2-editorial-intro{font-weight:600;color:#183d34!important;font-size:clamp(17px,2vw,21px)!important;line-height:1.7!important}
.fbos2-article-section{padding:24px 0 10px;border-top:1px solid #e9e8e1;margin-top:20px}
.fbos2-editorial-facts{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:22px;margin-top:26px}
.fbos2-editorial-facts>div{background:#f3f5f0;border:1px solid #e2e5dd;padding:23px;border-radius:10px}
.fbos2-editorial-facts p{font-size:15px;margin-bottom:0}
.fbos2-editorial-faq{margin-top:43px}
.fbos2-editorial-faq h2{font-size:29px}
.fbos2-editorial-faq details{border-top:1px solid #dfe2d9;padding:17px 0}
.fbos2-editorial-faq details:last-child{border-bottom:1px solid #dfe2d9}
.fbos2-editorial-faq summary{cursor:pointer;font-weight:720;line-height:1.55;color:#1f443b;font-size:16px}
.fbos2-editorial-faq details p{padding:13px 12px 0;margin:0;font-size:15px}
.fbos2-editorial-source{font-size:12px!important;line-height:1.7!important;margin-top:26px!important;padding-top:18px;border-top:1px dashed #d0d8d0;color:#64756d!important}
.fbos2-goto{display:flex;align-items:center;justify-content:flex-end;gap:9px;flex-wrap:wrap;margin:0 0 17px}
.fbos2-goto label{font:700 12px system-ui,sans-serif;color:var(--fbos2-reader-ink)}
.fbos2-goto input{border:1px solid #b4bfba;border-radius:6px;width:70px;padding:7px;font:500 14px system-ui,sans-serif;color:#243d32;background:#fff}
.fbos2-goto button{cursor:pointer;background:#204f43;color:#fff;border:0;border-radius:6px;padding:8px 13px;font:700 12px system-ui,sans-serif}
.fbos2-goto button:hover{background:#14352e}
.fbos2-reader-status{font-size:11px;line-height:1.5;color:var(--fbos2-reader-accent);margin:8px 0 12px;min-height:12px}
.fbos2-bookmarks-heading{border-top:1px solid #cad3ca;padding-top:17px;margin-top:24px!important}
.fbos2-bookmarks{display:flex;flex-wrap:wrap;gap:5px}
.fbos2-bookmarks button{border:1px solid #bacabd;padding:8px 10px;border-radius:6px;background:#fff;color:#23473c;font-size:11px;cursor:pointer}
.fbos2-bookmarks p{color:#67766b;font-size:11px}
.fbos2-reader-actions button[disabled],.fbos2-page-controls button[disabled]{opacity:.4;cursor:not-allowed}
.fbos2-reader-actions button:focus-visible,.fbos2-reader-toolbar button:focus-visible,.fbos2-reader-sidebar button:focus-visible,.fbos2-goto button:focus-visible,.fbos2-page-controls button:focus-visible{outline:3px solid #c19b65;outline-offset:2px}
.fbos2-reader-page{content-visibility:auto;contain-intrinsic-size:auto 660px}
.fbos2-page-mode .fbos2-reader-page{content-visibility:visible}
.fbos2-reading-box:fullscreen{overflow:auto;height:100vh;max-width:none;border-radius:0}
.fbos2-reading-box:fullscreen .fbos2-reader-top{position:sticky;top:0;z-index:20}
.fbos2-reader-page .fbos2-pageblank{font-style:italic;color:#79867f;font-size:.8em}
@media(max-width:750px){
 .fbos2-editorial{margin:28px 12px;padding:25px 19px}
 .fbos2-editorial-facts{grid-template-columns:1fr;gap:12px}
 .fbos2-reader-actions button{padding:11px 12px;font-size:11px}
 .fbos2-goto{justify-content:flex-start}
 .fbos2-reader-page{content-visibility:visible}
}
@media(prefers-reduced-motion:reduce){.fbos2-reading-box *{scroll-behavior:auto!important;animation:none!important;transition:none!important}}


/* FlipBook OS 2.1.2 — two source views, no external PDF service */
.fbos2-source-switch{display:flex;flex-wrap:wrap;gap:10px;align-items:center;padding:17px 24px;background:#edf0e9;border-bottom:1px solid #d8ded5}
.fbos2-source-button{border:1px solid #b8c5bb;border-radius:9px;background:#fff;color:#193f3a;font-size:14px;font-weight:700;padding:10px 18px;cursor:pointer;min-height:44px}
.fbos2-source-button.is-active{background:#193f3a;color:#fff;border-color:#193f3a}
.fbos2-source-hint{font-size:12px;color:#56635b;margin-left:auto}
.fbos2-pdf-panel{max-width:100%;padding:12px 16px 26px;background:#f6f6f2}
.fbos2-pdf-panel[hidden]{display:none!important}
.fbos2-pdf-head{display:flex;align-items:center;justify-content:space-between;gap:16px;margin-bottom:12px;flex-wrap:wrap}
.fbos2-pdf-head p{font-size:13px;line-height:1.6;margin:0;color:#41554b}
.fbos2-pdf-open{display:inline-block;color:#193f3a!important;font-weight:700;font-size:13px;text-decoration:underline!important;padding:8px 0}
.fbos2-pdf-frame{display:block;width:100%;height:min(85vh,1050px);min-height:500px;border:1px solid #cdd4cc;background:#fff;border-radius:7px}
.fbos2-reading-box[data-source-mode="pdf"] .fbos2-reader-toolbar,
.fbos2-reading-box[data-source-mode="pdf"] .fbos2-reader-sidebar,
.fbos2-reading-box[data-source-mode="pdf"] .fbos2-reader-progress,
.fbos2-reading-box[data-source-mode="pdf"] .fbos2-goto,
.fbos2-reading-box[data-source-mode="pdf"] .fbos2-reader-status,
.fbos2-reading-box[data-source-mode="pdf"] .fbos2-reader-content,
.fbos2-reading-box[data-source-mode="pdf"] .fbos2-page-controls,
.fbos2-reading-box[data-source-mode="pdf"] .fbos2-reader-footnote{display:none!important}
.fbos2-reading-box[data-source-mode="pdf"] .fbos2-reader-layout{display:block}
.fbos2-reading-box[data-source-mode="pdf"] .fbos2-reader-main{width:100%;max-width:none;padding:0;margin:0}
.fbos2-reading-box[data-source-mode="pdf"] .fbos2-pdf-panel{display:block}
@media(max-width:760px){
 .fbos2-source-switch{padding:12px;gap:8px}
 .fbos2-source-button{flex:1 1 150px;padding:11px 9px}
 .fbos2-source-hint{flex-basis:100%;text-align:center;margin:0}
 .fbos2-pdf-panel{padding:8px}
 .fbos2-pdf-frame{height:70vh;min-height:440px}
 .fbos2-pdf-head{padding:6px 5px}
}

/* FlipBook OS 2.1.3: curated reading paths */
.fbos2-reading-relations{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:16px;margin-top:18px}
.fbos2-reading-relation{display:grid;grid-template-columns:92px minmax(0,1fr);gap:14px;padding:16px;border:1px solid rgba(120,120,120,.25);border-radius:16px;align-items:start}
.fbos2-reading-relation .fbos2-cover{width:92px;height:auto;display:block;border-radius:5px}
.fbos2-reading-relation h3{font-size:1rem;line-height:1.35;margin:0 0 8px}
.fbos2-reading-relation p{font-size:.92rem;line-height:1.55;margin:0 0 10px}
.fbos2-reading-relation a{color:inherit}
.fbos2-card-title-link{color:inherit;text-decoration:none}
.fbos2-card-title-link:hover{text-decoration:underline}
@media(max-width:480px){.fbos2-reading-relation{grid-template-columns:76px minmax(0,1fr);padding:12px}.fbos2-reading-relation .fbos2-cover{width:76px}}

/* Topic collections - fully scoped to isolated FlipBook OS shell. */
.fbos2-topics-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(230px,1fr));gap:20px}
.fbos2-topic-card{padding:24px;background:var(--fbos2-surface,#fff);border:1px solid #d9d5cb;border-radius:14px;display:flex;flex-direction:column;gap:11px}
.fbos2-topic-card h2{font-family:Georgia,serif;font-size:1.38rem;line-height:1.25;margin:0}
.fbos2-topic-card h2 a{text-decoration:none;color:inherit}
.fbos2-topic-card p{line-height:1.6;flex:1;margin:0;color:inherit;opacity:.79}
.fbos2-source-toc{margin:22px 0;border:1px solid #d4caba;border-radius:12px;padding:18px}
.fbos2-source-toc summary{cursor:pointer;font-weight:700}
.fbos2-source-toc ol{columns:2;column-gap:40px;padding-left:22px;margin-bottom:0}
.fbos2-source-toc li{break-inside:avoid;line-height:1.55;margin:5px 0;font-size:.93rem}
@media(max-width:760px){.fbos2-source-toc ol{columns:1}.fbos2-topics-grid{grid-template-columns:1fr}}

/* Source excerpt readers for eleven verified print manuscripts. */
.fbos2-preview{scroll-margin-top:85px}
.fbos2-preview-parts{display:grid;gap:10px;margin:22px 0}
.fbos2-preview-part{border:1px solid #d7d0c1;border-radius:12px;overflow:hidden}
.fbos2-preview-part summary{list-style-position:inside;cursor:pointer;padding:16px 20px;font-weight:700}
.fbos2-preview-part[open] summary{border-bottom:1px solid #d7d0c1}
.fbos2-preview-text{padding:14px clamp(15px,4vw,35px) 25px;max-width:78ch;line-height:1.75;font-size:1.04rem}
.fbos2-preview-text h4{margin:24px 0 10px;font-size:1.04rem}
.fbos2-preview-text p{margin:0 0 1em}
.fbos2-preview-text *{overflow-wrap:anywhere}

/* FlipBook OS 2.3 — richer collections and trustworthy catalog context */
.fbos23-topic-guide,.fbos23-catalog-note{max-width:1120px;margin-inline:auto}
.fbos23-topic-guide{border-top:1px solid rgba(127,127,127,.18)}
.fbos23-topic-guide h2,.fbos23-catalog-note h2{margin:7px 0 18px}
.fbos23-topic-guide h3{margin:24px 0 10px;font-size:1.1rem}
.fbos23-topic-guide p,.fbos23-catalog-note p{line-height:1.78;max-width:850px}
.fbos23-lead{font-size:1.09rem}
.fbos23-topic-faq{max-width:850px;display:grid;gap:11px}
.fbos23-topic-faq details{border:1px solid rgba(127,127,127,.24);border-radius:10px;padding:14px 17px}
.fbos23-topic-faq summary{cursor:pointer;font-weight:650}
.fbos23-topic-faq details p{margin:12px 0 0}
.fbos23-note{color:var(--fbos2-muted,#6c6b64);font-size:.9rem;margin-top:22px}
.fbos23-catalog-note{background:rgba(149,139,112,.05);border-radius:14px}
@media(max-width:700px){.fbos23-topic-guide,.fbos23-catalog-note{padding:18px 15px}.fbos23-topic-faq details{padding:12px}}