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box-shadow .15s var(--easing-retro), background-color .15s ease;border-radius:10px;justify-content:center;align-items:center;gap:10px;padding:14px 20px;font-weight:500;display:flex}.btn-primary:hover{box-shadow:var(--shadow-retro-hover);background:#6a49fa;transform:translateY(-2px)}.btn-primary:active{box-shadow:var(--shadow-retro-active);transform:translate(2px,2px)}.btn-primary:disabled{opacity:.6;cursor:not-allowed;box-shadow:var(--shadow-retro-active);background:var(--color-gray);transform:none}.btn-danger{background:var(--color-error);border:var(--border-default);color:#fff;width:100%;font-family:var(--font-primary);font-size:var(--font-size-small);cursor:pointer;box-shadow:var(--shadow-retro);transition:transform .15s var(--easing-retro), box-shadow .15s var(--easing-retro), background-color .15s ease;border-radius:10px;justify-content:center;align-items:center;gap:8px;padding:12px 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wobbleAvatar{0%{transform:rotate(-4deg)scale(1)}to{transform:rotate(4deg)scale(1.05)}}.status-badge{border:var(--border-thin);font-family:var(--font-fallback);box-shadow:2px 2px 0px var(--color-black);background:#fff;border-radius:20px;align-items:center;gap:8px;margin-bottom:12px;padding:6px 12px;font-size:13px;font-weight:600;display:flex}.status-dot{border:1px solid var(--color-black);background:var(--color-warning);border-radius:50%;width:8px;height:8px}.status-dot.active{background:var(--color-success)}.status-dot.disconnected{background:var(--color-error)}.lk-bar-visualizer{border:var(--border-thin);max-width:160px;box-shadow:2px 2px 0px var(--color-black);background:#fff;border-radius:12px;margin-bottom:16px;padding:6px;width:100%!important;height:48px!important}.lk-bar-visualizer rect{fill:var(--color-primary)!important}.error-message{color:var(--color-error);border:var(--border-default);font-size:var(--font-size-small);text-align:center;background:#fff5f5;border-radius:8px;margin-top:16px;padding:12px 16px;font-weight:600}.block-definition{background:#eef2ff!important;border-color:#7c5cfd!important}.block-important{background:#fef3c7!important;border-color:#f59e0b!important}.block-example{background:#dcfce7!important;border-color:#22c55e!important}.block-exercise{background:#dbeafe!important;border-color:#3b82f6!important}.block-mistake{background:#fee2e2!important;border-color:#ef4444!important}.slide-active{border-color:var(--color-primary)!important;box-shadow:var(--shadow-retro)!important;background:#eef2ff!important}.agent-avatar,.lk-bar-visualizer{filter:url(#hand-drawn-filter)}::-webkit-scrollbar{width:8px;height:8px}::-webkit-scrollbar-track{background:#fff}::-webkit-scrollbar-thumb{background:var(--color-gray);border:1px solid var(--color-black);border-radius:4px}::-webkit-scrollbar-thumb:hover{background:var(--color-dark-gray)}.bookshelf-container{width:100%;max-width:var(--layout-maxContentWidth,1200px);margin:0 auto;padding:40px 20px}.bookshelf-title-section{text-align:center;margin-bottom:48px}.bookshelf-title-section h1{color:var(--color-black);margin-bottom:8px;font-size:3rem}.bookshelf-title-section p{color:var(--color-dark-gray);font-size:1.1rem}.bookshelf{border:var(--border-default);box-shadow:var(--shadow-retro);background:#fff;border-radius:16px;flex-direction:column;gap:64px;margin-bottom:48px;padding:40px;display:flex;position:relative}.shelf-row{align-items:flex-end;gap:16px;min-height:200px;padding-bottom:0;display:flex;position:relative}.shelf-wood{border:var(--border-thin);height:16px;box-shadow:0 4px 6px -1px #0000001a, var(--shadow-retro);background:#b45309;border-radius:4px;position:absolute;bottom:-16px;left:-20px;right:-20px}.shelf-wood:after{content:"";background-image:linear-gradient(90deg,#0000000d 1px,#0000 1px);background-size:40px 100%;position:absolute;inset:0}.book{border:var(--border-thin);cursor:pointer;width:54px;height:190px;transition:transform .2s var(--easing-retro), box-shadow .2s ease;transform-origin:bottom;border-bottom:none;border-radius:8px 8px 0 0;flex-direction:column;justify-content:space-between;align-items:center;padding:12px 6px;text-decoration:none;display:flex;position:relative;box-shadow:2px 0 #00000026}.book:hover{box-shadow:6px 4px 0px var(--color-black);transform:translateY(-16px)scale(1.05)rotate(-1deg)}.book-title{writing-mode:vertical-rl;text-orientation:mixed;font-family:var(--font-primary);color:var(--color-black);text-align:center;text-overflow:ellipsis;white-space:nowrap;flex:1;max-height:140px;font-size:1.15rem;font-weight:500;overflow:hidden;transform:rotate(180deg)}.book-accent-lines{border-top:2px solid var(--color-black);border-bottom:2px solid var(--color-black);opacity:.8;width:100%;height:6px}.add-book-book{border:3px dashed var(--color-black);cursor:pointer;width:54px;height:190px;color:var(--color-black);background:#f8fafc;border-bottom:none;border-radius:8px 8px 0 0;flex-direction:column;justify-content:center;align-items:center;font-size:1.5rem;transition:all .15s;display:flex}.add-book-book:hover{background:var(--color-light-gray);transform:translateY(-8px)}.add-book-book span{font-family:var(--font-primary);writing-mode:vertical-rl;text-orientation:mixed;margin-top:4px;font-size:.8rem;transform:rotate(180deg)}.history-section{width:100%;margin-top:32px}.history-grid{grid-template-columns:repeat(auto-fill,minmax(320px,1fr));gap:24px;margin-top:16px;display:grid}.history-card{border:var(--border-thin);box-shadow:var(--shadow-retro);transition:transform .2s var(--easing-retro), box-shadow .2s ease;background:#fff;border-radius:12px;flex-direction:column;justify-content:space-between;padding:20px;display:flex}.history-card:hover{box-shadow:var(--shadow-retro-hover);transform:translateY(-3px)}.dashboard-screen{transition:opacity .3s ease, transform .3s var(--easing-retro);opacity:1;transform:scale(1)}.learning-container{flex-direction:column;gap:32px;width:100%;display:flex}.learning-hero{background:linear-gradient(135deg,#f5f3ff 0%,#ede9fe 100%);border:1px solid 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#7c5cfd26}.learning-roadmap-dot.upcoming{border:2px solid var(--color-light-gray);color:var(--color-gray);background:#f8fafc}.learning-roadmap-node:hover .learning-roadmap-dot.active,.learning-roadmap-node:hover .learning-roadmap-dot.completed{transform:scale(1.05)}.learning-roadmap-label{color:var(--color-black);text-overflow:ellipsis;WebkitLineClamp:2;WebkitBoxOrient:"vertical";max-width:120px;font-size:.85rem;font-weight:600;display:-webkit-box;overflow:hidden}.learning-roadmap-arrow{color:var(--color-gray);flex-shrink:0;font-size:1.2rem}.learning-pack-module{border:1px solid var(--color-light-gray);background:#fff;border-radius:8px;transition:all .2s;overflow:hidden;box-shadow:0 2px 8px #00000005}.learning-pack-module:hover{box-shadow:0 4px 16px #0000000d}.learning-pack-header{cursor:pointer;-webkit-user-select:none;user-select:none;background:#fff;flex-wrap:wrap;justify-content:space-between;align-items:center;gap:16px;padding:24px;display:flex}.learning-pack-info{flex-direction:column;flex:1;gap:4px;min-width:250px;display:flex}.learning-pack-title{font-family:var(--font-fallback);color:var(--color-black);align-items:center;gap:8px;font-size:1.15rem;font-weight:700;display:flex}.learning-pack-meta{color:var(--color-dark-gray);font-size:.85rem}.learning-pack-progress-wrapper{align-items:center;gap:12px;min-width:200px;display:flex}.learning-pack-progress-bar-bg{background:var(--color-light-gray);border-radius:3px;flex:1;height:6px;overflow:hidden}.learning-pack-progress-bar-fg{background:var(--color-primary);border-radius:3px;height:100%;transition:width .3s}.learning-pack-progress-text{color:var(--color-dark-gray);text-align:right;width:35px;font-size:.85rem;font-weight:700}.learning-pack-arrow-icon{color:var(--color-dark-gray);transition:transform .2s}.learning-pack-arrow-icon.expanded{transform:rotate(180deg)}.learning-pack-content{border-top:1px solid var(--color-light-gray);background:#fafafa;padding:24px}.learning-ai-actions-bar{border-bottom:1px solid var(--color-light-gray);flex-wrap:wrap;gap:8px;margin-bottom:20px;padding-bottom:16px;display:flex}.btn-ai-action{color:#7c3aed;cursor:pointer;background:#fff;border:1px solid #d8b4fe;border-radius:20px;align-items:center;gap:6px;padding:6px 12px;font-size:.8rem;font-weight:600;transition:all .2s;display:flex}.btn-ai-action:hover{background:#f3e8ff;border-color:#a78bfa;transform:translateY(-1px)}.learning-lesson-grid{grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:20px;display:grid}.learning-lesson-card{border:1px solid var(--color-light-gray);background:#fff;border-radius:8px;flex-direction:column;justify-content:space-between;padding:20px;transition:all .2s;display:flex;box-shadow:0 2px 4px #00000003}.learning-lesson-card:hover{border-color:var(--color-gray);transform:translateY(-2px);box-shadow:0 4px 12px #0000000d}.learning-lesson-title{font-family:var(--font-fallback);color:var(--color-black);margin-bottom:8px;font-size:1.05rem;font-weight:700}.learning-lesson-objectives{color:var(--color-dark-gray);margin-bottom:16px;font-size:.85rem}.learning-lesson-objectives p{margin-bottom:4px;font-weight:600}.learning-lesson-objectives ul{padding-left:0;list-style:none}.learning-lesson-objectives li{margin-bottom:4px;padding-left:14px;line-height:1.3;position:relative}.learning-lesson-objectives li:before{content:"•";color:var(--color-primary);font-weight:700;position:absolute;left:4px}.learning-lesson-footer{border-top:1px solid var(--color-light-gray);justify-content:space-between;align-items:center;margin-top:12px;padding-top:12px;display:flex}.learning-lesson-duration{color:var(--color-dark-gray);align-items:center;gap:4px;font-size:.8rem;display:flex}.learning-insights-section{border:1px solid var(--color-light-gray);background:#fff;border-radius:8px;padding:24px;box-shadow:0 2px 8px #00000005}.learning-insights-title{font-family:var(--font-fallback);color:var(--color-black);text-align:left;margin-bottom:20px;font-size:1.2rem;font-weight:600}.learning-insights-grid{grid-template-columns:repeat(auto-fit,minmax(160px,1fr));gap:20px;display:grid}.learning-insight-card{border:1px solid var(--color-light-gray);text-align:center;background:#f8fafc;border-radius:8px;flex-direction:column;justify-content:center;align-items:center;padding:16px;display:flex}.learning-insight-icon{margin-bottom:8px;font-size:1.5rem}.learning-insight-val{color:var(--color-black);font-size:1.4rem;font-weight:700}.learning-insight-lbl{color:var(--color-dark-gray);font-size:.8rem}.modal-overlay{-webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px);z-index:1000;background:#00000080;justify-content:center;align-items:center;padding:20px;display:flex;position:fixed;inset:0}.modal-card{border:1px solid var(--color-light-gray);background:#fff;border-radius:12px;width:100%;max-width:600px;animation:.3s cubic-bezier(.16,1,.3,1) modalSlideUp;overflow:hidden;box-shadow:0 20px 25px -5px #0000001a,0 10px 10px -5px #0000000a}@keyframes modalSlideUp{0%{opacity:0;transform:translateY(20px)}to{opacity:1;transform:translateY(0)}}.modal-header{border-bottom:1px solid var(--color-light-gray);justify-content:space-between;align-items:center;padding:20px 24px;display:flex}.modal-title{font-family:var(--font-fallback);color:var(--color-black);font-size:1.25rem;font-weight:700}.modal-close-btn{color:var(--color-dark-gray);cursor:pointer;background:0 0;border:none;font-size:1.5rem;transition:color .2s}.modal-close-btn:hover{color:var(--color-black)}.modal-body{max-height:70vh;padding:24px;overflow-y:auto}.modal-footer{border-top:1px solid var(--color-light-gray);background:#fafafa;justify-content:flex-end;gap:12px;padding:16px 24px;display:flex}.flashcard-scene{perspective:600px;width:100%;height:220px;margin:16px 0}.flashcard-3d{width:100%;height:100%;transform-style:preserve-3d;cursor:pointer;transition:transform .6s;position:relative}.flashcard-3d.flipped{transform:rotateY(180deg)}.flashcard-face{backface-visibility:hidden;text-align:center;border-radius:8px;flex-direction:column;justify-content:center;align-items:center;width:100%;height:100%;padding:24px;display:flex;position:absolute;box-shadow:0 4px 10px #0000000d}.flashcard-front{color:var(--color-primary);background:#f5f3ff;border:1px solid #d8b4fe;font-size:1.4rem;font-weight:700}.flashcard-back{border:1px solid var(--color-light-gray);color:var(--color-black);background:#fff;overflow-y:auto;transform:rotateY(180deg)}.quiz-option{border:1px solid var(--color-light-gray);text-align:left;cursor:pointer;width:100%;color:var(--color-black);background:#fff;border-radius:8px;margin-bottom:12px;padding:14px 20px;font-size:.95rem;font-weight:500;transition:all .2s}.quiz-option:hover:not(:disabled){border-color:var(--color-gray);background:#f8fafc}.quiz-option.correct{border-color:var(--color-success);color:#03543f;background:#def7ec}.quiz-option.incorrect{border-color:var(--color-error);color:#9b1c1c;background:#fde8e8}.library-grid{grid-template-columns:repeat(auto-fill,minmax(180px,1fr));gap:28px;width:100%;margin-bottom:48px;display:grid}.library-book-card{border:1px solid var(--color-light-gray);cursor:pointer;background:#fff;border-radius:8px;flex-direction:column;transition:all .2s;display:flex;overflow:hidden;box-shadow:0 4px 6px -1px #0000000d,0 2px 4px -1px #00000008}.library-book-card:hover{border-color:var(--color-gray);transform:translateY(-4px);box-shadow:0 10px 15px -3px #0000001a,0 4px 6px -2px #0000000d}.library-book-cover-wrapper{aspect-ratio:.75;border-bottom:1px solid var(--color-light-gray);background:#f8fafc;justify-content:center;align-items:center;width:100%;display:flex;position:relative;overflow:hidden}.library-book-cover{object-fit:cover;width:100%;height:100%;transition:transform .3s}.library-book-card:hover .library-book-cover{transform:scale(1.05)}.library-book-cover-fallback{color:var(--color-gray);font-size:3rem}.library-book-hover-overlay{opacity:0;background:#7c5cfde6;flex-direction:column;justify-content:center;align-items:center;gap:8px;transition:opacity .2s;display:flex;position:absolute;inset:0}.library-book-card:hover .library-book-hover-overlay{opacity:1}.library-book-hover-icon{color:#fff;font-size:2rem;transition:transform .2s;transform:translateY(10px)}.library-book-card:hover 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10px;font-size:.8rem;font-weight:600}.selected-list-card{flex-direction:column;max-height:250px;display:flex}.no-selection-placeholder{font-family:var(--font-fallback);color:var(--color-dark-gray);margin:0;font-size:.8rem;line-height:1.4}.selected-pages-pill-container{flex-wrap:wrap;gap:6px;max-height:160px;padding-right:4px;display:flex;overflow-y:auto}.selected-page-pill{background:var(--color-green-highlight);border:1.5px solid var(--color-black);font-family:var(--font-fallback);color:var(--color-black);box-shadow:1px 1px 0px var(--color-black);border-radius:6px;align-items:center;gap:6px;padding:3px 8px;font-size:.75rem;font-weight:700;display:inline-flex}.btn-remove-pill{color:var(--color-black);cursor:pointer;background:0 0;border:none;justify-content:center;align-items:center;padding:0;font-size:.95rem;font-weight:900;line-height:1;display:inline-flex}.btn-remove-pill:hover{color:var(--color-error)}@media (max-width:768px){.pdf-selector-layout{grid-template-columns:1fr;gap:16px}.pdf-preview-card{padding:12px}.pdf-canvas-container{aspect-ratio:.8}}