.offline-indicator{position:fixed;top:10px;right:10px;background:var(--offline-bg);color:#fff;padding:8px 16px;border-radius:20px;font-size:12px;z-index:2000;display:none;box-shadow:0 2px 8px var(--shadow-large);transition:background-color .3s ease}.offline-indicator.show{display:block}.offline-indicator.online{background:var(--online-bg)}.install-prompt{background:var(--accent-color);color:#fff;padding:12px 16px;border-radius:8px;margin-bottom:10px;display:none;text-align:center;cursor:pointer;transition:background-color .3s ease}.install-prompt.show{display:block}.install-prompt button{background:#fff;color:var(--accent-color);border:none;padding:6px 12px;border-radius:4px;margin-left:8px;cursor:pointer;font-weight:600;transition:color .3s ease}.book-info{position:fixed;top:10px;left:50%;transform:translate(-50%);background:var(--bg-panel-solid);padding:12px 16px;border-radius:8px;margin-bottom:10px;display:none;box-shadow:0 4px 12px var(--shadow-medium);align-items:center;justify-content:space-between;z-index:1500;max-width:90%;transition:opacity .3s ease,transform .3s ease,background-color .3s ease;opacity:0;pointer-events:none}.book-info.show{display:flex;opacity:1;pointer-events:auto}.book-info-text{flex:1;color:var(--text-primary);font-size:14px}.book-info button{background:var(--accent-color);color:#fff;border:none;padding:6px 12px;border-radius:4px;cursor:pointer;font-size:14px;margin-left:10px;transition:background-color .2s}.book-info button:hover{background:var(--accent-hover)}.top-panel{position:fixed;top:0;left:0;right:0;width:100%;background:var(--bg-panel);backdrop-filter:blur(10px);-webkit-backdrop-filter:blur(10px);padding:12px 24px;box-shadow:0 1px 3px var(--shadow);z-index:1500;border-bottom:1px solid var(--border-color);transition:background-color .3s ease,border-color .3s ease}.top-panel-content{max-width:1400px;margin:0 auto;display:flex;align-items:center;justify-content:flex-end;gap:16px}.top-panel-title{display:flex;align-items:center;gap:10px;flex:1;min-width:0}.book-icon{font-size:18px;flex-shrink:0}.book-title{color:var(--text-title);font-size:15px;font-weight:500;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;letter-spacing:-.01em}.top-panel-actions{display:flex;align-items:center;gap:8px;flex-shrink:0}.top-panel .btn-label{background:transparent;color:var(--text-secondary);border:none;padding:8px 16px;border-radius:6px;cursor:pointer;font-size:14px;font-weight:500;transition:all .2s ease;white-space:nowrap}.top-panel .btn-label:hover{background:#0000000d;color:var(--text-title)}.dark-mode .top-panel .btn-label:hover{background:#ffffff1a}.top-panel .btn-label:active{transform:scale(.98)}@media (max-width: 768px){.top-panel{padding:10px 16px}.top-panel .btn-label{padding:6px 12px;font-size:13px}}.reader{background:var(--bg-secondary);padding:20px;max-width:100%;margin:0;width:100%;height:100vh;overflow-y:auto;box-shadow:none;font-family:Bookerly,Georgia,Times New Roman,serif;position:absolute;inset:0;transition:background-color .3s ease,color .3s ease}.reader h1{font-size:24px;margin-bottom:15px;color:var(--text-primary)}.reader p{margin-bottom:15px;color:var(--text-primary);text-align:justify}.reader img{max-width:100%;height:auto;margin:15px 0}.reader *{color:inherit}.reader h1,.reader h2,.reader h3,.reader h4,.reader h5,.reader h6{color:var(--text-primary)}.reader a{color:var(--accent-color)}.reader a:hover{color:var(--accent-hover)}.dark-mode .reader img{opacity:.9}.dark-mode .reader [style*=color]{filter:brightness(1.2)}.word{cursor:pointer;user-select:none;-webkit-user-select:none;transition:background-color .1s}.word.highlighted{background-color:var(--highlight-bg);border-radius:2px}.word.defined{border-bottom:2px dotted var(--accent-color);cursor:pointer}.word.defined:hover{background-color:var(--highlight-bg);border-radius:2px}.summary-marker{margin:30px 0;display:flex;align-items:center;justify-content:center;cursor:pointer;user-select:none;-webkit-user-select:none;position:relative;transition:opacity .2s}.summary-marker:hover{opacity:.7}.summary-marker.loading{opacity:.5}.summary-marker-line{flex:1;height:1px;background-color:var(--summary-color);max-width:200px}.summary-marker-icon{margin:0 12px;width:32px;height:32px;display:flex;align-items:center;justify-content:center;color:var(--summary-color);position:relative}.summary-marker-icon:before{content:"";position:absolute;width:32px;height:32px;border-radius:50%;background-color:var(--summary-bg);box-shadow:0 2px 4px var(--shadow)}.summary-marker-icon svg{position:relative;z-index:1;filter:drop-shadow(0 1px 2px rgba(0,0,0,.1))}.summary-marker.loading .summary-marker-icon{animation:pulse 1.5s ease-in-out infinite}@keyframes pulse{0%,to{opacity:1}50%{opacity:.5}}.definition{position:fixed;bottom:0;left:0;right:0;width:100%;background:var(--bg-panel-solid);padding:20px;border-radius:16px 16px 0 0;box-shadow:0 -4px 24px var(--shadow-large);max-height:50vh;overflow-y:auto;z-index:1000;font-size:16px;line-height:1.6;text-align:justify;border-top:1px solid var(--border-solid);transform:translateY(0);transition:transform .3s ease-out,opacity .3s ease-out,background-color .3s ease,border-color .3s ease;opacity:1}.definition.hidden{display:block!important;transform:translateY(100%);opacity:0;pointer-events:none}.definition-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:12px;padding-bottom:8px;border-bottom:2px solid var(--border-solid)}.definition-word{font-weight:600;font-size:20px;color:var(--accent-color);flex:1}.definition-unmark-btn{background:var(--bg-secondary);border:1px solid var(--border-solid);border-radius:6px;width:36px;height:36px;display:flex;align-items:center;justify-content:center;cursor:pointer;color:var(--text-secondary);padding:0;transition:background-color .2s,color .2s,border-color .2s,transform .1s;flex-shrink:0}.definition-unmark-btn svg{width:18px;height:18px;stroke:currentColor}.definition-unmark-btn:hover{background:#ef4444;color:#fff;border-color:#ef4444}.definition-unmark-btn:active{transform:scale(.95)}.definition-section{margin-bottom:16px}.definition-section:last-child{margin-bottom:0}.definition-text{color:var(--text-primary);margin-bottom:4px;text-align:justify;display:block}.definition-example{color:var(--text-tertiary);font-style:italic;padding-left:12px;border-left:3px solid var(--accent-color);margin-top:8px;text-align:justify;display:block}.definition-loading{color:var(--text-tertiary);font-style:italic}.loading-screen{position:fixed;inset:0;width:100vw;height:100vh;background:var(--bg-primary);display:flex;align-items:center;justify-content:center;z-index:9999;margin:0;padding:0;transition:background-color .3s ease}.loading-content{display:flex;flex-direction:column;align-items:center;justify-content:center;gap:20px}.spinner{width:40px;height:40px;border:3px solid rgba(99,174,141,.2);border-top-color:var(--accent-color);border-radius:50%;animation:spin .8s linear infinite}.dark-mode .spinner{border-color:#4a9d7a33;border-top-color:var(--accent-color)}@keyframes spin{to{transform:rotate(360deg)}}.loading-content p{font-size:16px;color:var(--text-primary);font-weight:400;margin:0;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif}@media (max-width: 768px){.spinner{width:32px;height:32px;border-width:2px}.loading-content p{font-size:14px}}.welcome-overlay{position:fixed;inset:0;background:#000000b3;backdrop-filter:blur(4px);z-index:10000;display:flex;align-items:center;justify-content:center;padding:20px;animation:fadeIn .3s ease-in-out}@keyframes fadeIn{0%{opacity:0}to{opacity:1}}.welcome-modal{background:var(--bg-primary, #F5F2E8);border-radius:16px;max-width:600px;width:100%;max-height:90vh;overflow-y:auto;box-shadow:0 20px 60px #0000004d;position:relative;animation:slideUp .3s ease-out;border:2px solid var(--border-color, #63AE8D)}@keyframes slideUp{0%{transform:translateY(30px);opacity:0}to{transform:translateY(0);opacity:1}}.welcome-close{position:absolute;top:15px;right:15px;background:transparent;border:none;font-size:24px;cursor:pointer;color:var(--text-secondary, #666);width:32px;height:32px;display:flex;align-items:center;justify-content:center;border-radius:50%;transition:all .2s ease;z-index:1}.welcome-close:hover{background:var(--bg-secondary, rgba(0, 0, 0, .1));color:var(--text-primary, #333);transform:rotate(90deg)}.welcome-content{padding:40px 30px 30px;color:var(--text-primary, #333)}.welcome-title{font-size:32px;margin-bottom:30px;text-align:center;color:var(--accent-color, #63AE8D);font-weight:700}.welcome-section{margin-bottom:25px;padding-bottom:20px;border-bottom:1px solid var(--border-color, rgba(99, 174, 141, .2))}.welcome-section:last-of-type{border-bottom:none}.welcome-section h2{font-size:20px;margin-bottom:12px;color:var(--accent-color, #63AE8D);font-weight:600}.welcome-section p{font-size:16px;line-height:1.6;margin-bottom:10px;color:var(--text-primary, #333)}.welcome-section em{font-style:italic;color:var(--text-secondary, #666)}.welcome-tip{background:var(--bg-secondary, rgba(99, 174, 141, .1));padding:12px 16px;border-radius:8px;border-left:4px solid var(--accent-color, #63AE8D);margin-top:12px;font-size:15px}.welcome-tip strong{color:var(--accent-color, #63AE8D)}.welcome-final{background:linear-gradient(135deg,#63ae8d1a,#63ae8d0d);padding:20px;border-radius:12px;border:2px dashed var(--accent-color, #63AE8D);margin-top:20px}.welcome-final h2{text-align:center;font-size:24px;margin-bottom:15px}.welcome-final p{text-align:center;font-size:17px}.welcome-button{width:100%;padding:16px 24px;background:var(--accent-color, #63AE8D);color:#fff;border:none;border-radius:8px;font-size:18px;font-weight:600;cursor:pointer;margin-top:30px;transition:all .3s ease;box-shadow:0 4px 12px #63ae8d4d}.welcome-button:hover{background:var(--accent-hover, #52a07a);transform:translateY(-2px);box-shadow:0 6px 16px #63ae8d66}.welcome-button:active{transform:translateY(0);box-shadow:0 2px 8px #63ae8d4d}@media (prefers-color-scheme: dark){.welcome-modal{background:var(--bg-primary, #1a1a1a);border-color:var(--border-color, #63AE8D)}.welcome-content{color:var(--text-primary, #e0e0e0)}.welcome-section{border-bottom-color:var(--border-color, rgba(99, 174, 141, .3))}.welcome-tip{background:var(--bg-secondary, rgba(99, 174, 141, .15))}}@media (max-width: 768px){.welcome-modal{max-width:95%;max-height:95vh}.welcome-content{padding:30px 20px 20px}.welcome-title{font-size:26px;margin-bottom:20px}.welcome-section h2{font-size:18px}.welcome-section p{font-size:15px}.welcome-button{font-size:16px;padding:14px 20px}}*{margin:0;padding:0;box-sizing:border-box}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif;background:var(--bg-primary);padding:0;margin:0;font-size:20px;line-height:1.6;overflow:hidden;color:var(--text-primary);transition:background-color .3s ease,color .3s ease}.app{min-height:100vh;width:100%;height:100vh;position:relative;overflow:hidden}.reader-container{width:100%;height:100vh;position:relative;margin:0;padding:60px 0 0}.hidden{display:none}.loading{text-align:center;padding:20px;color:var(--text-tertiary)}.error{background:var(--error-bg);color:#fff;padding:15px;border-radius:8px;margin:10px 0}.error button{background:transparent;color:#fff;border:1px solid white;padding:4px 8px;border-radius:4px;cursor:pointer}:root{font-family:Inter,system-ui,Avenir,Helvetica,Arial,sans-serif;line-height:1.5;font-weight:400;--bg-primary: #F5F2E8;--bg-secondary: #F0EEE1;--bg-panel: rgba(255, 255, 255, .95);--bg-panel-solid: #F5F2E8;--text-primary: #4A3E2E;--text-secondary: #666;--text-tertiary: #8B6F47;--text-title: #1a1a1a;--border-color: rgba(0, 0, 0, .06);--border-solid: #D4C4B0;--accent-color: #63AE8D;--accent-hover: #559A7A;--highlight-bg: #E8D5B7;--summary-color: #63AE8D;--summary-bg: #F0EEE1;--error-bg: #C97D60;--offline-bg: #D4A574;--online-bg: #63AE8D;--shadow: rgba(0, 0, 0, .08);--shadow-medium: rgba(0, 0, 0, .15);--shadow-large: rgba(0, 0, 0, .2)}.dark-mode{--bg-primary: #1a1a1a;--bg-secondary: #2d2d2d;--bg-panel: rgba(30, 30, 30, .95);--bg-panel-solid: #1a1a1a;--text-primary: #e0e0e0;--text-secondary: #b0b0b0;--text-tertiary: #a0a0a0;--text-title: #f0f0f0;--border-color: rgba(255, 255, 255, .1);--border-solid: #404040;--accent-color: #4a9d7a;--accent-hover: #5ab88a;--highlight-bg: #3d4a3d;--summary-color: #4a9d7a;--summary-bg: #2d2d2d;--error-bg: #c97d60;--offline-bg: #b8956a;--online-bg: #4a9d7a;--shadow: rgba(0, 0, 0, .3);--shadow-medium: rgba(0, 0, 0, .4);--shadow-large: rgba(0, 0, 0, .5)}body{margin:0;padding:0;min-width:320px;min-height:100vh;width:100%;height:100vh;overflow:hidden}#root{width:100%;height:100vh;margin:0;padding:0}