:root{--wbf-bg:#efe8dc;--wbf-paper:#fffdf8;--wbf-text:#2d2925;--wbf-muted:#756b61;--wbf-accent:#8a5a2b;--wbf-line:#dfd4c4;--wbf-shadow:0 18px 50px rgba(50,35,20,.13)}
.wbf-book{max-width:1180px;margin:30px auto;background:var(--wbf-paper);color:var(--wbf-text);box-shadow:var(--wbf-shadow);border-radius:16px;overflow:hidden;font-family:Georgia,"Times New Roman",serif}
.wbf-cover{min-height:520px;display:grid;grid-template-columns:minmax(280px,42%) 1fr;background:linear-gradient(135deg,#382615,#8a5a2b);color:#fff}
.wbf-cover-image{min-height:520px;background:#1d140d}.wbf-cover-image img{width:100%;height:100%;object-fit:cover;display:block;opacity:.9}
.wbf-cover-copy{padding:70px 7%;display:flex;flex-direction:column;justify-content:center}.wbf-label{font:700 12px/1.2 Arial,sans-serif;letter-spacing:.22em;opacity:.8}.wbf-cover h1{font-size:clamp(42px,6vw,78px);line-height:1.03;margin:20px 0}.wbf-subtitle{font-size:22px;line-height:1.5;opacity:.9}.wbf-author,.wbf-published{font-family:Arial,sans-serif}.wbf-published{opacity:.65;font-size:14px}
.wbf-toolbar{position:sticky;top:0;z-index:20;display:flex;gap:8px;align-items:center;padding:12px 18px;background:rgba(255,253,248,.96);border-bottom:1px solid var(--wbf-line);backdrop-filter:blur(12px)}.wbf-toolbar button,.wbf-chapter-nav button{border:1px solid var(--wbf-line);background:#fff;padding:9px 13px;border-radius:8px;cursor:pointer;color:var(--wbf-text)}.wbf-toolbar button:hover,.wbf-chapter-nav button:hover{border-color:var(--wbf-accent);color:var(--wbf-accent)}
.wbf-layout{display:grid;grid-template-columns:290px minmax(0,1fr);min-height:700px}.wbf-sidebar{background:#f7f1e8;border-right:1px solid var(--wbf-line);padding:30px 22px}.wbf-toc{position:sticky;top:80px}.wbf-toc h2{font-size:24px;margin-top:0}.wbf-toc ol{padding-left:22px;margin:0}.wbf-toc li{margin:10px 0;line-height:1.4}.wbf-toc-sub{margin-left:18px!important;font-size:.92em}.wbf-toc a{color:var(--wbf-text);text-decoration:none}.wbf-toc a:hover,.wbf-toc a.is-active{color:var(--wbf-accent);font-weight:700}
.wbf-pages{padding:54px clamp(24px,7vw,88px)}.wbf-page-content{font-size:19px;line-height:1.85;max-width:760px;margin:auto}.wbf-page-content>p:first-of-type:first-letter{float:left;font-size:4.2em;line-height:.8;padding:8px 10px 0 0;color:var(--wbf-accent)}.wbf-page-content h2{font-size:38px;line-height:1.2;margin:70px 0 22px;padding-top:30px;border-top:1px solid var(--wbf-line);scroll-margin-top:90px}.wbf-page-content h3{font-size:27px;margin-top:42px;scroll-margin-top:90px}.wbf-page-content blockquote{margin:32px 0;padding:24px 28px;border-left:5px solid var(--wbf-accent);background:#f7f1e8;font-style:italic}.wbf-page-content img{max-width:100%;height:auto;border-radius:10px}.wbf-page-content table{width:100%;border-collapse:collapse;display:block;overflow:auto}.wbf-page-content th,.wbf-page-content td{border:1px solid var(--wbf-line);padding:10px 12px}.wbf-chapter-nav{display:flex;justify-content:space-between;align-items:center;gap:12px;margin:65px auto 0;padding-top:25px;border-top:1px solid var(--wbf-line);max-width:760px;font-family:Arial,sans-serif}.wbf-chapter-nav span{font-size:13px;color:var(--wbf-muted);text-align:center}
.wbf-progress{position:fixed;top:0;left:0;width:100%;height:4px;z-index:99999;background:transparent}.wbf-progress span{display:block;width:0;height:100%;background:var(--wbf-accent)}
.wbf-book.wbf-night{--wbf-paper:#171717;--wbf-text:#eee7dc;--wbf-muted:#aaa096;--wbf-line:#3a352f;--wbf-bg:#111}.wbf-book.wbf-night .wbf-toolbar{background:rgba(23,23,23,.96)}.wbf-book.wbf-night .wbf-sidebar,.wbf-book.wbf-night blockquote{background:#211f1c}.wbf-book.wbf-night button{background:#26231f;color:#eee7dc}
@media(max-width:850px){.wbf-cover{grid-template-columns:1fr}.wbf-cover-image{min-height:320px}.wbf-cover-copy{padding:50px 28px}.wbf-layout{grid-template-columns:1fr}.wbf-sidebar{display:none;border-right:0;border-bottom:1px solid var(--wbf-line)}.wbf-sidebar.is-open{display:block}.wbf-pages{padding:38px 22px}.wbf-toolbar{overflow:auto}.wbf-toolbar button{white-space:nowrap}.wbf-page-content{font-size:18px}.wbf-page-content h2{font-size:31px}.wbf-chapter-nav span{display:none}}
@media print{body{background:#fff!important}.wbf-progress,.wbf-toolbar,.wbf-sidebar,.wbf-chapter-nav{display:none!important}.wbf-book{box-shadow:none;margin:0;max-width:none}.wbf-cover{page-break-after:always;min-height:100vh}.wbf-layout{display:block}.wbf-pages{padding:0}.wbf-page-content{max-width:none;font-size:12pt}.wbf-page-content h2{page-break-before:always;border:0}.wbf-page-content a{color:#000;text-decoration:none}}