html,body{height:100%;width:100%;overflow:hidden}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Oxygen,Ubuntu,Cantarell,Fira Sans,Droid Sans,Helvetica Neue,sans-serif;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}code{font-family:source-code-pro,Menlo,Monaco,Consolas,Courier New,monospace}#root{height:100%;width:100%}::-webkit-scrollbar{width:8px;height:8px}::-webkit-scrollbar-track{background:#f1f1f1}::-webkit-scrollbar-thumb{background:#888;border-radius:4px}::-webkit-scrollbar-thumb:hover{background:#555}@keyframes fadeIn{0%{opacity:0}to{opacity:1}}@keyframes slideIn{0%{transform:translateY(20px);opacity:0}to{transform:translateY(0);opacity:1}}.fade-in{animation:fadeIn .3s ease-in-out}.slide-in{animation:slideIn .3s ease-out}#root{width:100%;height:100vh;padding:0}:root{--primary-color: #8B4513;--background-color: #F5F5DC;--text-color: #333333;--secondary-bg: #FFFFFF;--border-color: #DDDDDD;--hover-bg: #F0F0F0;--shadow: 0 2px 4px rgba(0, 0, 0, .1);--sidebar-width: 300px}.theme-light{--primary-color: #8B4513;--background-color: #F5F5DC;--text-color: #333333;--secondary-bg: #FFFFFF;--border-color: #DDDDDD;--hover-bg: #F0F0F0}.theme-sepia{--primary-color: #704214;--background-color: #F4ECD8;--text-color: #593E1A;--secondary-bg: #E8DCCA;--border-color: #D3C0A5;--hover-bg: #E0D2C0}*{margin:0;padding:0;box-sizing:border-box}body{font-family:Noto Sans SC,Segoe UI,Tahoma,Geneva,Verdana,sans-serif;background-color:var(--background-color);color:var(--text-color);line-height:1.6}.app-container{display:flex;flex-direction:column;height:100vh;overflow:hidden}.toolbar{display:flex;align-items:center;justify-content:space-between;padding:5px 10px;background-color:var(--secondary-bg);border-bottom:1px solid var(--border-color);box-shadow:var(--shadow);z-index:100}.toggle-sidebar-btn{background:none;border:none;font-size:24px;cursor:pointer;color:var(--primary-color);padding:5px 10px;border-radius:4px;transition:background-color .3s}.toggle-sidebar-btn:hover{background-color:var(--hover-bg)}.fullscreen-btn{background:none;border:none;font-size:24px;cursor:pointer;color:var(--primary-color);padding:5px 10px;border-radius:4px;transition:background-color .3s}.fullscreen-btn:hover{background-color:var(--hover-bg)}.settings-btn{background:none;border:none;font-size:24px;cursor:pointer;color:var(--primary-color);padding:5px 10px;border-radius:4px;transition:background-color .3s}.help-btn{background:none;border:none;font-size:24px;cursor:pointer;color:var(--primary-color);padding:5px 10px;border-radius:4px;transition:background-color .3s}.help-btn:hover{background-color:var(--hover-bg)}.toolbar-center{display:flex;align-items:center;justify-content:space-between;flex:1}.toolbar-left{display:flex;align-items:center;justify-content:center}.toolbar-right-center{display:flex;align-items:center;justify-content:center;flex:1;margin:0 20px}.app-logo{width:64px;height:64px;vertical-align:middle;background-color:transparent;image-rendering:-webkit-optimize-contrast;image-rendering:crisp-edges}.theme-dark .app-logo{filter:brightness(1.2) contrast(1.1)}.theme-sepia .app-logo{filter:sepia(.2)}.title-container{display:flex;flex-direction:column;align-items:center;margin-left:10px}.app-title-large{font-size:40px;color:var(--primary-color);margin:0;padding:0;font-weight:700;text-shadow:2px 2px 4px rgba(0,0,0,.3);letter-spacing:1px;font-family:Segoe UI,Tahoma,Geneva,Verdana,sans-serif}.app-title-with-book{font-size:24px;color:var(--primary-color);margin:0 0 8px;padding:0;font-weight:700;text-shadow:1px 1px 2px rgba(0,0,0,.2);letter-spacing:1px;font-family:Segoe UI,Tahoma,Geneva,Verdana,sans-serif}.book-info-container{display:flex;align-items:center;gap:8px;flex-wrap:wrap;justify-content:center}.book-info-separator{color:var(--text-color);opacity:.7;font-size:16px}.current-book-title{display:block;font-size:16px;color:var(--text-color);font-weight:500;max-width:300px;white-space:normal;text-align:center;line-height:1.3}.current-book-author{display:block;font-size:14px;color:var(--text-color);opacity:.8}.toolbar-right{display:flex;align-items:center;gap:15px}.add-btn-icon{background-color:var(--primary-color);color:#fff;width:36px;height:36px;border-radius:50%;cursor:pointer;display:flex;align-items:center;justify-content:center;font-size:20px;transition:all .3s;border:none;flex-shrink:0}.add-btn-icon:hover{opacity:.9;transform:scale(1.1)}.add-btn:hover{opacity:.9}.theme-selector{padding:8px 12px;border:1px solid var(--border-color);border-radius:4px;background-color:#fff;font-size:14px;cursor:pointer}.main-content{display:flex;flex:1;overflow:hidden;transition:all .3s ease}.main-content.sidebar-visible,.main-content.sidebar-hidden{padding-left:0}.sidebar{width:var(--sidebar-width);background-color:var(--secondary-bg);border-right:1px solid var(--border-color);display:flex;flex-direction:column;transition:transform .3s ease;z-index:99;height:calc(100vh - 60px)}.sidebar.show{transform:translate(0)}.sidebar.hide{transform:translate(-100%);position:absolute}.sidebar-header{padding:20px;border-bottom:1px solid var(--border-color)}.tabs{display:flex;gap:10px}.tab{flex:1;padding:8px 12px;border:1px solid var(--border-color);background-color:#fff;border-radius:4px;cursor:pointer;font-size:14px;transition:all .3s}.tab:hover{background-color:var(--hover-bg)}.tab.active{background-color:var(--primary-color);color:#fff;border-color:var(--primary-color)}.sidebar-header h2{font-size:20px;color:var(--primary-color)}.books-list{flex:1;overflow-y:auto;padding:10px}.book-item{display:flex;align-items:center;justify-content:space-between;padding:12px;margin-bottom:8px;background-color:#fff;border-radius:6px;cursor:pointer;transition:all .3s;border:1px solid var(--border-color)}.book-item:hover{background-color:var(--hover-bg);transform:translateY(-1px);box-shadow:var(--shadow)}.book-item.active{background-color:var(--hover-bg);border-color:var(--primary-color)}.downloadable-book{cursor:default}.downloadable-book:hover{transform:translateY(-1px)}.book-info{flex:1;min-width:0}.book-title{font-size:16px;margin-bottom:4px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.book-meta{display:flex;flex-direction:column;font-size:12px;color:#666}.delete-book-btn{background-color:#ff4d4f;color:#fff;border:none;width:24px;height:24px;border-radius:50%;cursor:pointer;font-size:18px;line-height:1;transition:background-color .3s}.delete-book-btn:hover{background-color:#ff7875}.download-btn{background-color:var(--primary-color);color:#fff;padding:6px 12px;border-radius:4px;font-size:12px;text-decoration:none;transition:background-color .3s;white-space:nowrap;border:none;cursor:pointer}.download-btn:hover{opacity:.9;background-color:var(--primary-color);color:#fff}.read-now-btn{background-color:#4caf50;color:#fff;padding:6px 12px;border-radius:4px;font-size:12px;text-decoration:none;transition:background-color .3s;white-space:nowrap;border:none;cursor:pointer}.read-now-btn:hover{opacity:.9;background-color:#45a049;color:#fff}.empty-message{text-align:center;color:#666;padding:40px 20px}.loading-spinner{width:40px;height:40px;border:4px solid var(--border-color);border-top:4px solid var(--primary-color);border-radius:50%;animation:spin 1s linear infinite;margin:0 auto 16px}@keyframes spin{0%{transform:rotate(0)}to{transform:rotate(360deg)}}.loading-message{text-align:center;padding:40px 20px;color:#666}.library-controls{padding:15px;background-color:var(--secondary-bg);border-bottom:1px solid var(--border-color);margin:-10px -10px 10px;display:flex;gap:10px;align-items:center}.filter-controls{display:flex;gap:10px;margin-top:10px;align-items:center}.search-input{flex:1;padding:8px 12px;border:1px solid var(--border-color);border-radius:4px;font-size:14px;outline:none;transition:border-color .3s}.search-input:focus{border-color:var(--primary-color);box-shadow:0 0 0 2px #8b45131a}.category-filter{flex:1;padding:8px 12px;border:1px solid var(--border-color);border-radius:4px;background-color:#fff;font-size:14px;cursor:pointer;outline:none}.category-filter:focus{border-color:var(--primary-color);box-shadow:0 0 0 2px #8b45131a}.refresh-btn{padding:8px 12px;background-color:var(--primary-color);color:#fff;border:none;border-radius:4px;cursor:pointer;font-size:14px;transition:background-color .3s;white-space:nowrap}.refresh-btn:hover:not(:disabled){opacity:.9}.refresh-btn:disabled{background-color:#ccc;cursor:not-allowed}.downloadable-books-list{overflow-y:auto;flex:1}.download-read-btn{background-color:var(--primary-color);color:#fff;padding:6px 12px;border-radius:4px;font-size:12px;text-decoration:none;transition:background-color .3s;white-space:nowrap;border:none;cursor:pointer}.download-read-btn:hover{opacity:.9;background-color:var(--primary-color);color:#fff}.welcome-actions{display:flex;gap:20px;margin-top:30px;justify-content:center;flex-wrap:wrap}.browse-books-btn{background-color:var(--primary-color);color:#fff;padding:12px 24px;border-radius:6px;font-size:16px;cursor:pointer;border:none;transition:all .3s;white-space:nowrap}.browse-books-btn:hover{opacity:.9;transform:translateY(-2px);box-shadow:0 4px 8px #00000026}.reader-container{flex:1;display:flex;justify-content:center;align-items:flex-start;padding:10px 20px 20px;overflow-y:auto;background-color:var(--background-color)}.welcome-message{text-align:center;max-width:600px;padding:40px;background-color:var(--secondary-bg);border-radius:10px;box-shadow:var(--shadow)}.welcome-message h2{color:var(--primary-color);margin-bottom:20px;font-size:28px}.welcome-message p{margin-bottom:16px}.welcome-intro{margin:30px 0;text-align:left;background-color:#8b45130d;padding:20px;border-radius:8px;border-left:4px solid var(--primary-color)}.welcome-intro h3{color:var(--primary-color);margin-bottom:15px;font-size:20px;text-align:center}.welcome-intro ul{list-style-type:none;padding:0}.welcome-intro li{margin-bottom:12px;padding-left:20px;position:relative;line-height:1.5}.welcome-intro li:before{content:"✓";color:var(--primary-color);position:absolute;left:0;font-weight:700}.welcome-intro li strong{color:var(--primary-color);margin-right:8px}.welcome-tips{margin:25px 0;padding:20px;background-color:#8b451314;border-radius:8px;text-align:center}.welcome-tips h4{color:var(--primary-color);margin-bottom:10px;font-size:18px}.welcome-tips p{font-style:italic;color:var(--text-color);opacity:.9}.upload-large-btn{display:inline-block;background-color:var(--primary-color);color:#fff;padding:12px 24px;border-radius:6px;font-size:16px;cursor:pointer;margin-top:20px;transition:all .3s}.upload-large-btn:hover{opacity:.9;transform:translateY(-2px);box-shadow:0 4px 8px #00000026}.book-content{width:100%;padding:10px;border-radius:10px;box-shadow:var(--shadow);transition:all .3s ease}.app-container.theme-light .book-content{background-color:#f0f4e8!important;color:#333!important;box-shadow:0 2px 8px #00000014}.app-container.theme-light .book-content p{text-shadow:.5px .5px 0px rgba(0,0,0,.03);letter-spacing:.5px}.app-container.theme-sepia .book-content{background-color:#f8f3e9!important;color:#5a4b3c!important;box-shadow:0 2px 8px #0000001a}.app-container.theme-sepia .book-content p{text-shadow:.5px .5px 0px rgba(0,0,0,.02)}.page-content{text-align:justify;white-space:pre-wrap;word-break:break-word;line-height:inherit}.paragraph.empty-line{height:1.6em;margin:0;padding:0}.footer{background-color:var(--secondary-bg);border-top:1px solid var(--border-color);padding:15px 20px;display:flex;align-items:center;justify-content:space-between;gap:20px}.progress-container{flex:1;display:flex;align-items:center;gap:16px}.progress-text{font-size:14px;color:var(--text-color);min-width:120px}.progress-bar{width:300px;height:6px;-webkit-appearance:none;appearance:none;background-color:#ddd;border-radius:3px;outline:none}.progress-bar::-webkit-slider-thumb{-webkit-appearance:none;appearance:none;width:16px;height:16px;background-color:var(--primary-color);border-radius:50%;cursor:pointer}.progress-bar::-moz-range-thumb{width:16px;height:16px;background-color:var(--primary-color);border-radius:50%;cursor:pointer;border:none}.page-controls{display:flex;gap:10px}.nav-btn{padding:8px 16px;background-color:var(--primary-color);color:#fff;border:none;border-radius:4px;cursor:pointer;font-size:14px;transition:background-color .3s}.nav-btn:hover:not(:disabled){opacity:.9}.nav-btn:disabled{background-color:#ccc;cursor:not-allowed}.reading-settings{display:flex;gap:20px;align-items:center}.setting-group{display:flex;align-items:center;gap:8px;font-size:14px}.setting-group label{color:var(--text-color)}.setting-group button{width:24px;height:24px;background-color:var(--hover-bg);border:1px solid var(--border-color);border-radius:4px;cursor:pointer;font-size:16px;line-height:1;display:flex;align-items:center;justify-content:center;transition:background-color .3s}.setting-group button:hover{background-color:#e0e0e0}@media(max-width:768px){.sidebar{position:absolute;height:calc(100vh - 60px)}.sidebar.show{transform:translate(0)}.footer{flex-direction:column;gap:10px;padding:10px}.reading-settings{flex-wrap:wrap;justify-content:center}.toolbar{padding:10px}.app-title-large{font-size:24px}.app-title-with-book{font-size:18px}.book-info-container{display:none}.reader-container,.book-content{padding:20px}}@media(max-width:480px){.toolbar-right{gap:10px}.add-btn{padding:6px 12px;font-size:12px}.theme-selector{padding:6px 10px;font-size:12px}.setting-group{flex-direction:column;gap:4px}}.theme-btn{width:32px;height:32px;background-color:var(--hover-bg);border:1px solid var(--border-color);border-radius:4px;cursor:pointer;font-size:16px;transition:all .3s;display:flex;align-items:center;justify-content:center}.theme-btn:hover{background-color:var(--secondary-bg);transform:translateY(-1px);box-shadow:var(--shadow)}.theme-btn.active{background-color:var(--primary-color);color:#fff;border-color:var(--primary-color)}.setting-group button{width:32px;height:32px;background-color:var(--hover-bg);border:1px solid var(--border-color);border-radius:4px;cursor:pointer;font-size:14px;font-weight:700;line-height:1;display:flex;align-items:center;justify-content:center;transition:all .3s}.setting-group button:hover:not(:disabled){background-color:var(--secondary-bg);transform:translateY(-1px);box-shadow:var(--shadow)}.setting-group button:disabled{opacity:.5;cursor:not-allowed;transform:none;box-shadow:none}.settings-btn{background:none;border:none;font-size:20px;cursor:pointer;color:var(--primary-color);padding:8px;border-radius:4px;transition:background-color .3s}.settings-btn:hover{background-color:var(--hover-bg)}.modal-overlay{position:fixed;inset:0;background-color:#00000080;display:flex;align-items:center;justify-content:center;z-index:1000;padding:20px}.modal-content{background-color:var(--secondary-bg);border-radius:10px;width:100%;max-width:600px;max-height:90vh;overflow-y:auto;box-shadow:0 10px 30px #0000004d}.modal-header{display:flex;justify-content:space-between;align-items:center;padding:20px 25px;border-bottom:1px solid var(--border-color)}.modal-header h2{color:var(--primary-color);font-size:20px;margin:0}.close-btn{background:none;border:none;font-size:28px;cursor:pointer;color:#666;padding:0;width:32px;height:32px;display:flex;align-items:center;justify-content:center;border-radius:4px;transition:background-color .3s}.close-btn:hover{background-color:var(--hover-bg);color:var(--text-color)}.modal-body{padding:25px}.modal-body h3{color:var(--primary-color);margin-bottom:15px;font-size:18px}.modal-body p{margin-bottom:20px;color:var(--text-color);line-height:1.6}.settings-actions{display:flex;flex-direction:column;gap:12px;margin-bottom:25px}.settings-btn-primary{background-color:var(--primary-color);color:#fff;border:none;padding:12px 20px;border-radius:6px;cursor:pointer;font-size:16px;transition:all .3s}.settings-btn-primary:hover{opacity:.9;transform:translateY(-1px);box-shadow:0 4px 8px #00000026}.settings-btn-danger{background-color:#ff4d4f;color:#fff;border:none;padding:12px 20px;border-radius:6px;cursor:pointer;font-size:16px;transition:all .3s}.settings-btn-danger:hover{background-color:#ff7875;transform:translateY(-1px);box-shadow:0 4px 8px #00000026}.status-message{padding:12px 16px;border-radius:6px;margin-bottom:20px;font-size:14px;font-weight:500}.status-success{background-color:#f6ffed;color:#52c41a;border:1px solid #b7eb8f}.status-warning{background-color:#fff7e6;color:#fa8c16;border:1px solid #ffd591}.status-info{background-color:#e6f7ff;color:#1890ff;border:1px solid #91d5ff}.settings-instructions{background-color:var(--hover-bg);padding:20px;border-radius:8px;border:1px solid var(--border-color)}.settings-instructions h4{color:var(--primary-color);margin-bottom:12px;font-size:16px}.settings-instructions ul{list-style-type:disc;padding-left:20px}.settings-instructions li{margin-bottom:8px;color:var(--text-color);font-size:14px;line-height:1.5}.settings-instructions strong{font-weight:600;color:var(--primary-color)}@media(max-width:600px){.modal-overlay{padding:10px}.modal-header,.modal-body{padding:15px 20px}.settings-actions{gap:10px}.settings-btn-primary,.settings-btn-danger{padding:10px 16px;font-size:14px}}.ad-container{width:100%;padding:10px 20px;background-color:var(--secondary-bg);border-top:1px solid var(--border-color);border-bottom:1px solid var(--border-color);display:flex;justify-content:center;align-items:center;min-height:60px;box-sizing:border-box}.ad-container .adsbygoogle{max-width:100%;width:100%}@media(max-width:768px){.ad-container{padding:8px 15px;min-height:50px}}@media(max-width:480px){.ad-container{padding:6px 10px;min-height:45px}}:fullscreen .ad-container,:-webkit-full-screen .ad-container,:-moz-full-screen .ad-container,:-ms-fullscreen .ad-container{display:none}.help-modal-overlay{position:fixed;top:0;left:0;width:100%;height:100%;background-color:#00000080;display:flex;align-items:center;justify-content:center;z-index:1000}.help-modal-content{background-color:#fff;border-radius:8px;box-shadow:0 4px 16px #00000026;width:90%;max-width:1000px;height:80vh;display:flex;flex-direction:column;overflow:hidden}.help-modal-header{display:flex;justify-content:space-between;align-items:center;padding:16px 20px;border-bottom:1px solid #e0e0e0;background-color:#f8f9fa}.help-modal-header h2{margin:0;font-size:20px;color:#333}.help-modal-body{display:flex;height:100%;overflow:hidden}.help-sidebar{width:250px;border-right:1px solid #e0e0e0;background-color:#f8f9fa;overflow-y:auto}.help-topics-list{list-style:none;padding:0;margin:0}.help-topic-btn{width:100%;text-align:left;padding:12px 16px;border:none;background:none;cursor:pointer;font-size:14px;color:#555;transition:all .2s ease;border-left:3px solid transparent}.help-topic-btn:hover{background-color:#e9ecef;color:#333}.help-topic-btn.active{background-color:#fff;color:#007bff;font-weight:500;border-left-color:#007bff;box-shadow:2px 0 4px #0000000d}.help-content{flex:1;padding:24px;overflow-y:auto;background-color:#fff}.help-content h3{margin-top:0;margin-bottom:16px;font-size:18px;color:#333;border-bottom:1px solid #e0e0e0;padding-bottom:8px}.help-content h4{margin-top:24px;margin-bottom:12px;font-size:16px;color:#555}.help-content p{margin-bottom:16px;line-height:1.6;color:#666}.help-content ul,.help-content ol{margin-bottom:16px;padding-left:24px}.help-content li{margin-bottom:8px;line-height:1.6;color:#666}.feature-list{background-color:#f8f9fa;border-radius:6px;padding:16px;margin-bottom:20px}.feature-list h4{margin-top:0}.step-by-step{margin-bottom:20px}.step{display:flex;margin-bottom:20px;align-items:flex-start}.step-number{display:flex;align-items:center;justify-content:center;width:28px;height:28px;border-radius:50%;background-color:#007bff;color:#fff;font-weight:700;font-size:14px;margin-right:12px;flex-shrink:0}.step-content h4{margin-top:0;margin-bottom:8px}.step-content p{margin-bottom:0}.note{background-color:#fff3cd;border:1px solid #ffeaa7;border-radius:4px;padding:12px 16px;margin-top:20px}.note strong{color:#856404}.control-section,.management-section,.format-section,.trouble-section{background-color:#f8f9fa;border-radius:6px;padding:16px;margin-bottom:16px}.control-section h4,.management-section h4,.format-section h4,.trouble-section h4{margin-top:0;color:#333}.theme-sepia .help-modal-content{background-color:#f8f3e9}.theme-sepia .help-modal-header{background-color:#f0e6d2;border-bottom-color:#d4c8b0}.theme-sepia .help-sidebar{background-color:#f0e6d2;border-right-color:#d4c8b0}.theme-sepia .help-topic-btn:hover{background-color:#e6d9c0}.theme-sepia .help-topic-btn.active{background-color:#f8f3e9;box-shadow:2px 0 4px #00000014}.theme-sepia .help-content{background-color:#f8f3e9}.theme-sepia .help-content h3{border-bottom-color:#d4c8b0}.theme-sepia .feature-list,.theme-sepia .control-section,.theme-sepia .management-section,.theme-sepia .format-section,.theme-sepia .trouble-section{background-color:#f0e6d2}.theme-sepia .note{background-color:#f5e7c9;border-color:#e6d2a9}.theme-sepia .note strong{color:#8c6e24}