.reader-intro{display:flex;align-items:center;justify-content:space-between;gap:18px;padding:20px 24px;background:linear-gradient(110deg,#f1e8ee,#fff8ef);border:1px solid var(--line);border-radius:16px;margin-bottom:24px}.reader-intro p{font-size:13px;line-height:1.6;color:var(--muted);margin-top:9px}.reader-layout{display:grid;grid-template-columns:260px minmax(0,1fr);gap:24px;align-items:start}.book-index{background:#fff;border:1px solid var(--line);border-radius:16px;padding:20px 12px 14px;position:sticky;top:20px;min-width:0}.book-index .library-header{padding-bottom:16px}.book-index .library-header h2{font-size:16px}.book-index .library-header>span{font-size:11px}.book-contents{max-height:65vh;overflow:auto;padding:12px 3px;scrollbar-width:thin;scrollbar-color:#d3c5d0 transparent}.book-contents details{margin-bottom:8px}.book-contents summary{cursor:pointer;padding:12px 5px;font-size:12px;font-weight:700;color:var(--deep);line-height:1.5}.book-entry{width:100%;text-align:left;padding:10px 9px;display:flex;gap:10px;align-items:flex-start;border-radius:8px;min-height:43px;font-size:12px;line-height:1.6}.book-entry>span:first-child{font-size:10px;min-width:20px;margin-top:2px;color:var(--muted);font-weight:600}.book-entry.current{background:var(--soft);color:var(--deep);font-weight:600}.book-entry:hover{background:#f8f3f7}.index-note{font-size:11px;color:var(--muted);line-height:1.7;border-top:1px solid var(--line);padding:14px 5px 0}.index-empty{font-size:13px;color:var(--muted);padding:18px 8px;line-height:1.7}.reader-main{min-width:0}.reader-toolbar{display:flex;flex-wrap:wrap;justify-content:space-between;gap:8px;background:white;border:1px solid var(--line);border-radius:13px;padding:9px 12px;margin-bottom:16px;align-items:center}.page-controls,.zoom-controls{display:flex;align-items:center;gap:4px}.reader-icon{display:grid;place-items:center;border:1px solid transparent;border-radius:8px;min-width:38px;height:38px;font-size:23px;color:var(--purple)}.reader-icon:hover:not(:disabled){background:var(--soft)}.page-picker{display:flex;align-items:center;gap:7px;font-size:12px;color:var(--muted)}.page-picker select{border:1px solid var(--line);background:#fcfafc;color:var(--deep);border-radius:7px;padding:8px;font:inherit;font-weight:600;min-height:38px;min-width:58px}.zoom-value{font-size:12px;color:var(--deep);padding:10px 4px;min-width:47px}.reader-stage{overflow:auto;background:#ebe6e9;border:1px solid #e2d9df;border-radius:14px;padding:24px;max-height:85vh;min-height:300px;scrollbar-width:thin;scrollbar-color:#bba8b8 #ebe6e9;overscroll-behavior:contain}.reader-stage img{display:block;max-width:none;height:auto;box-shadow:0 5px 22px #39273718;background:#fff;border-radius:2px}.reader-stage:focus-visible{outline:3px solid #ab7ba2;outline-offset:4px}#book-error{background:white;padding:22px;font-size:14px;line-height:1.7;color:var(--deep)}.reader-caption{display:flex;align-items:center;justify-content:space-between;gap:18px;margin:22px 0 16px}.reader-caption h2{font-family:'Lora',Georgia,serif;font-size:22px;font-weight:500;line-height:1.4;margin-top:6px}.reading-saved{font-size:11px;color:var(--muted);max-width:140px;line-height:1.6;text-align:right}.reading-track{height:4px;background:var(--soft);border-radius:5px;overflow:hidden}.reading-track>span{height:100%;display:block;background:#a2829b;transition:width .2s}.reader-bottom{display:flex;align-items:center;justify-content:space-between;gap:10px;margin-top:20px}.reader-bottom>span{font-size:12px;color:var(--muted)}.reader-note{font-size:11px;line-height:1.8;color:var(--muted);padding:15px 18px;background:#f0eaf0;border-radius:10px;margin-top:18px}.reader-expanded{position:fixed;inset:0;z-index:20;background:var(--canvas);padding:20px;overflow:auto}.reader-expanded .reader-layout{max-width:1400px;margin:auto}.reader-expanded .reader-intro{max-width:1400px;margin:0 auto 20px}.reader-expanded .reader-stage{max-height:calc(100vh - 210px)}
@media(max-width:1180px){.reader-layout{grid-template-columns:220px minmax(0,1fr);gap:18px}.reader-toolbar{padding:8px}.reader-icon{min-width:34px}.reader-stage{padding:16px}.reader-caption h2{font-size:20px}}
@media(max-width:980px){.book-index{top:95px}.reader-layout{grid-template-columns:230px minmax(0,1fr)}}
@media(max-width:720px){.sidebar{flex-wrap:wrap}.brand{flex:1}.sidebar nav{width:100%;display:grid;grid-template-columns:1fr 1fr;padding-top:4px}.nav-button{justify-content:center;font-size:14px!important}.brand strong{font-size:20px}.brand small{font-size:11px}.reader-intro{padding:17px;align-items:flex-start;flex-wrap:wrap;margin-bottom:18px}.reader-intro .outline-button{min-height:42px;padding:10px 14px}.reader-layout{display:flex;flex-direction:column;gap:18px}.book-index{position:static;width:100%;padding:16px 12px 8px}.book-contents{max-height:180px}.index-note{font-size:10px;padding:10px 5px 5px}.reader-main{width:100%}.reader-toolbar{justify-content:center;gap:3px 12px}.reader-stage{padding:8px;border-radius:10px;max-height:78vh;min-height:240px}.reader-caption{margin-top:18px;align-items:flex-start}.reader-caption h2{font-size:20px}.reading-saved{max-width:95px;font-size:10px}.reader-bottom .outline-button,.reader-bottom .primary-button{font-size:12px;padding:11px;min-height:44px}.reader-bottom>span{font-size:11px;white-space:nowrap}.reader-expanded{padding:12px}.reader-expanded .book-index{display:none}.reader-expanded .reader-intro{display:none}.reader-expanded .reader-stage{max-height:calc(100dvh - 190px)}.reader-expanded .reader-caption{margin:12px 0}.reader-expanded .reader-note,.reader-expanded .device-note{display:none}.reader-expanded .reader-bottom{margin-top:12px}}
.index-toggle{display:none}
@media(max-width:720px){.index-toggle{display:flex;align-items:center;justify-content:space-between;min-height:44px;width:100%;padding:6px;color:var(--deep);font-weight:600;font-size:14px}.index-toggle:after{content:'⌄';font-size:20px}.book-index:not(.index-open) .library-header,.book-index:not(.index-open) .search-field,.book-index:not(.index-open) .book-contents,.book-index:not(.index-open) .index-note{display:none}.book-index{padding:6px 12px}.reader-intro{margin-bottom:14px}.reader-intro .lesson-badge{font-size:10px}.reader-intro p{font-size:12px}.reader-stage{max-height:75vh}}

#material-view>.reader-intro{margin:28px 0 0}.reader-expanded>.reader-intro{margin:28px auto 0}