.book-toolbar{display:flex;gap:16px;align-items:end;flex-wrap:wrap;margin-bottom:24px}.book-toolbar label{margin:0;flex:1;min-width:160px;font-size:12px}.book-toolbar label:first-child{flex:2}.book-library{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:22px}.book-tile,.book-add-tile{min-width:0}.book-open{border:0;background:transparent;padding:0;width:100%;text-align:left}.book-open:hover{background:transparent;transform:translateY(-3px)}.book-cover{height:185px;display:flex;align-items:center;justify-content:center;border-radius:10px;background:linear-gradient(135deg,#507843,var(--forest));color:#fff;overflow:hidden}.book-cover>span{font-size:56px;font-weight:800}.book-cover img{width:100%;height:100%;object-fit:cover}.book-open h2{font-size:14px;line-height:1.5;margin:12px 0 6px}.book-open p{font-size:11px;color:var(--muted);margin:0 0 6px}.book-open small{font-size:10px}.book-add-tile{border:1px dashed #b7c5b3;height:185px;background:#fafcf8;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:14px;font-size:12px}.book-add-tile>span{font-size:30px}.book-library-list{grid-template-columns:1fr}.book-library-list .book-add-tile{height:60px;flex-direction:row}.book-library-list .book-open{display:grid;grid-template-columns:55px 1fr;column-gap:18px;align-items:center;border-bottom:1px solid var(--line);padding-bottom:15px}.book-library-list .book-cover{height:70px;grid-row:span 3}.book-library-list .book-cover>span{font-size:22px}.book-library-list .book-open h2{margin:0}.book-heading{display:flex;gap:20px;align-items:center;margin-bottom:28px}.book-cover-small{height:100px;width:75px;flex-shrink:0}.book-cover-small>span{font-size:30px}.book-heading h1{font-size:28px}.book-heading p{margin:0}.book-lesson-search{font-size:12px;margin-bottom:22px}.book-chapter{border:1px solid var(--line);border-radius:10px;background:#fff;margin:10px 0;overflow:hidden}.book-chapter summary{list-style:none;display:flex;gap:15px;align-items:center;cursor:pointer;padding:16px}.book-chapter summary::after{content:'⌄';margin-left:auto}.book-chapter[open] summary::after{content:'⌃'}.book-chapter summary b{font-size:14px}.book-chapter summary small{font-size:11px;color:var(--muted)}.chapter-number{display:grid;place-items:center;background:var(--lime);color:var(--forest);width:35px;height:35px;border-radius:7px;flex-shrink:0}.book-chapter-content{padding:0 18px 18px 30px}.book-lesson-row{display:flex;gap:12px;align-items:center;padding:8px 0;border-top:1px solid var(--line)}.book-lesson-row[hidden]{display:none}.lesson-number{font-size:10px;color:#507843;background:#edf4e5;padding:4px;border-radius:4px}.book-lesson-row>button{border:0;background:transparent;text-align:left;padding:7px;flex:1;font-size:13px}.book-lesson-row small{font-size:10px}.book-add-chapter{width:100%;margin-top:18px;padding:18px;border-style:dashed}.book-lesson-workspace{display:grid;grid-template-columns:minmax(0,1fr) 210px;gap:22px;align-items:start}.book-section-nav{background:#fafcf8;border:1px solid var(--line);border-radius:10px;padding:20px;position:sticky;top:20px}.book-section-nav a{display:flex;gap:10px;justify-content:space-between;text-decoration:none;font-size:12px;padding:10px 0;border-bottom:1px solid var(--line)}.book-section-nav button{font-size:11px;margin-top:16px;padding:8px}.book-section-heading{display:flex;justify-content:space-between;align-items:center;gap:12px;border-bottom:1px solid var(--line);padding-bottom:15px}.book-section-heading h2{margin:0}.book-section-heading button{padding:4px 8px;font-size:12px}.book-section{scroll-margin-top:20px}.book-section-empty{text-align:center;min-height:200px;display:flex;flex-direction:column;justify-content:center;align-items:center;color:var(--muted);font-size:12px}.book-section-empty>span{font-size:32px}.book-section-actions{display:flex;gap:8px;margin-top:22px;flex-wrap:wrap}.book-section-actions button{font-size:12px}.book-content-block{padding:20px 0;border-bottom:1px solid var(--line);overflow-wrap:anywhere}.book-content-block:last-child{border-bottom:0}.book-content-block h3{margin-bottom:14px}.book-content-block video,.book-content-block audio{max-width:100%;width:100%;margin-top:12px}.book-text{white-space:pre-wrap;line-height:1.8}.book-images img{width:auto;max-width:100%;height:auto;max-height:700px;object-fit:contain;border-radius:8px}.book-images figure{margin:12px 0}.book-images-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}.book-images-grid img{width:100%;height:220px;object-fit:contain}.book-images-slides{display:flex;overflow-x:auto;scroll-snap-type:x mandatory;gap:16px}.book-images-slides figure{flex:0 0 95%;scroll-snap-align:start}.book-note{background:var(--peach);padding:18px;border-radius:9px}.book-template-grid{display:grid;grid-template-columns:1fr 1fr;gap:16px;margin-top:22px}.book-template-grid>button{display:flex;flex-direction:column;text-align:left;padding:15px;background:#fafcf8;gap:12px}.book-template-grid b{font-size:12px}.book-template-icon{background:var(--mint);width:100%;height:72px;display:grid;place-items:center;border-radius:7px;font-size:29px;color:var(--forest)}.book-wide-modal{width:760px}.book-editor-tabs{border-bottom:1px solid var(--line);padding:10px 0;font-size:12px;font-weight:700;color:var(--forest)}.book-upload-zone{border:1px dashed #b7c5b3;background:#f3f6f1;padding:24px;text-align:center;border-radius:9px;color:var(--muted);font-size:13px;pointer-events:none}.book-upload-zone small{display:block;margin-top:8px;font-size:10px}.book-form-error{color:#a12634;font-size:12px}@media(max-width:1150px){.book-library{grid-template-columns:repeat(3,minmax(0,1fr))}.book-library-list{grid-template-columns:1fr}}@media(max-width:900px){.book-lesson-workspace{grid-template-columns:1fr}.book-section-nav{position:static;grid-row:1}.book-section-nav a{display:inline-flex;margin-right:14px}.book-section-nav h3{margin-bottom:5px}.book-section-nav button{margin-top:8px}.book-library{grid-template-columns:1fr 1fr}.book-library-list{grid-template-columns:1fr}.book-heading{flex-wrap:wrap}.book-heading h1{font-size:25px}}@media(max-width:550px){.book-library{gap:15px}.book-cover,.book-add-tile{height:150px}.book-library-list .book-cover{height:70px}.book-cover-small{width:50px;height:75px}.book-heading{gap:12px}.book-heading h1{font-size:22px}.book-chapter summary{gap:10px;padding:12px}.book-chapter summary small{display:none}.book-section{padding:18px}.book-template-grid{gap:10px}.book-template-grid>button{padding:10px}.book-images-grid{grid-template-columns:1fr}}

.book-upload-zone{pointer-events:auto;width:100%;cursor:pointer}.book-upload-zone:hover{background:#edf4e5}