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.copied-hint{margin-left:6px;color:#059102;font-size:12px;font-weight:600;-webkit-user-select:none;user-select:none}.book-list-sidebar .book-list .book-item:last-of-type{margin-bottom:0}.book-list-sidebar .book-list::-webkit-scrollbar{width:6px;height:6px}.book-list-sidebar .book-list::-webkit-scrollbar-track{background:#e0e0e0}.book-list-sidebar .book-list::-webkit-scrollbar-thumb{background:#acacac}.display-book{width:100%;height:100vh;display:flex;align-items:center;justify-content:center;font-family:Arial,sans-serif;background-color:#7a7a7a}.display-book .error-container{display:flex;flex-direction:column;align-items:center;justify-content:center;height:100vh;text-align:center;padding:2rem}.display-book .error-container h2{color:#e74c3c;margin-bottom:1rem}.display-book .error-container p{color:#666;margin-bottom:2rem;max-width:500px}.display-book .error-container button{background-color:#3498db;color:#fff;border:none;padding:.75rem 1.5rem;border-radius:4px;cursor:pointer;font-size:1rem;transition:background-color .3s ease}.display-book .error-container button:hover{background-color:#2980b9}.display-book .book-viewer{height:auto;max-width:1600px;padding:0}.display-book .book-viewer.full-page{min-height:auto}.display-book .book-viewer.full-page .book-content-header{max-width:100%;border-bottom:1px solid #ddd;padding:20px 30px;margin:0 0 100px}.display-book .book-viewer.full-page .book-content-header h3{margin:0}.display-book .book-viewer .book-content-container,.display-book .book-viewer .book-viewer-loading{min-height:calc(100vh - 250px)}.display-book .book-viewer .book-viewer-loading>div{margin-top:-160px;text-align:center}