@import"https://fonts.googleapis.com/css2?family=Instrument+Serif:ital@0;1&family=JetBrains+Mono:wght@400;500&family=Outfit:wght@300;400;500;600&display=swap";:root{--bg-base: #f7f3eb;--bg-cream: #fffcf5;--bg-card: #ffffff;--ink-black: #1a1714;--ink-warm: #2d2824;--ink-muted: #6b6358;--accent-vermillion: #e84c30;--accent-rust: #c73e27;--accent-gold: #d4a853;--highlight: rgba(232, 76, 48, .08);--shadow-soft: 0 2px 20px rgba(26, 23, 20, .06);--shadow-lifted: 0 8px 40px rgba(26, 23, 20, .12);--grain: url("data:image/svg+xml,%3Csvg viewBox='0 0 200 200' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noise'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%' height='100%' filter='url(%23noise)'/%3E%3C/svg%3E");--font-display: "Instrument Serif", Georgia, serif;--font-body: "Outfit", system-ui, sans-serif;--font-mono: "JetBrains Mono", monospace}*{margin:0;padding:0;box-sizing:border-box}html{font-size:16px;scroll-behavior:smooth}body{font-family:var(--font-body);background:var(--bg-base);color:var(--ink-black);min-height:100vh;line-height:1.6;position:relative;overflow-x:hidden}body:before{content:"";position:fixed;top:0;right:0;bottom:0;left:0;background:var(--grain);opacity:.03;pointer-events:none;z-index:9999}#app{display:flex;min-height:100vh}.sidebar{width:280px;background:var(--bg-cream);border-right:1px solid rgba(26,23,20,.08);padding:2.5rem 1.5rem;display:flex;flex-direction:column;position:fixed;height:100vh;z-index:100}.logo{font-family:var(--font-display);font-size:1.75rem;font-weight:400;color:var(--ink-black);margin-bottom:.25rem;letter-spacing:-.02em}.logo-sub{font-size:.75rem;color:var(--ink-muted);text-transform:uppercase;letter-spacing:.15em;font-weight:500;margin-bottom:3rem}.nav{display:flex;flex-direction:column;gap:.25rem;margin-bottom:3rem}.nav-item{padding:.875rem 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cubic-bezier(.4,0,.2,1);background:transparent;position:relative;overflow:hidden}.upload-zone:before{content:"";position:absolute;top:0;right:0;bottom:0;left:0;background:linear-gradient(135deg,var(--accent-vermillion),var(--accent-gold));opacity:0;transition:opacity .3s ease}.upload-zone:hover,.upload-zone.dragover{border-color:var(--accent-vermillion);transform:translateY(-2px)}.upload-zone:hover:before,.upload-zone.dragover:before{opacity:.05}.upload-content{display:flex;flex-direction:column;align-items:center;gap:.75rem;position:relative;z-index:1}.upload-icon{font-size:2rem;filter:grayscale(.3)}.upload-text{font-size:.8rem;color:var(--ink-muted);font-weight:500;text-transform:uppercase;letter-spacing:.1em}.upload-hint{font-size:.7rem;color:var(--ink-muted);opacity:.7}.main{flex:1;margin-left:280px;padding:3rem 4rem;min-height:100vh}.view{display:none;animation:fadeIn .4s ease}.view.active{display:block}@keyframes fadeIn{0%{opacity:0;transform:translateY(10px)}to{opacity:1;transform:translateY(0)}}.view-header{display:flex;justify-content:space-between;align-items:flex-end;margin-bottom:3rem;padding-bottom:2rem;border-bottom:1px solid rgba(26,23,20,.08)}.view-header h1{font-family:var(--font-display);font-size:3rem;font-weight:400;letter-spacing:-.03em;color:var(--ink-black);line-height:1}.view-header h1 em{font-style:italic;color:var(--accent-vermillion)}.header-meta{font-size:.8rem;color:var(--ink-muted);text-transform:uppercase;letter-spacing:.1em}.search-box{position:relative}.search-box input{background:var(--bg-card);border:1px solid rgba(26,23,20,.1);border-radius:8px;padding:.875rem 1.25rem .875rem 3rem;color:var(--ink-black);font-size:.9rem;font-family:var(--font-body);width:320px;transition:all .2s ease;box-shadow:var(--shadow-soft)}.search-box input:focus{outline:none;border-color:var(--accent-vermillion);box-shadow:var(--shadow-lifted),0 0 0 3px var(--highlight)}.search-box input::placeholder{color:var(--ink-muted)}.search-box:before{content:"⌕";position:absolute;left:1.25rem;top:50%;transform:translateY(-50%);font-size:1rem;color:var(--ink-muted)}.book-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(220px,1fr));gap:2rem}.book-card{background:var(--bg-card);border-radius:12px;padding:1.5rem;cursor:pointer;transition:all .3s cubic-bezier(.4,0,.2,1);border:1px solid rgba(26,23,20,.06);box-shadow:var(--shadow-soft);position:relative;overflow:hidden}.book-card:before{content:"";position:absolute;top:0;left:0;right:0;height:3px;background:linear-gradient(90deg,var(--accent-vermillion),var(--accent-gold));transform:scaleX(0);transform-origin:left;transition:transform .3s ease}.book-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-lifted)}.book-card:hover:before{transform:scaleX(1)}.book-cover{width:100%;aspect-ratio:2.5/3.5;background:linear-gradient(145deg,#e8e4dc,#d4cfc4);border-radius:6px;display:flex;align-items:center;justify-content:center;font-size:3.5rem;margin-bottom:1.25rem;position:relative;overflow:hidden}.book-cover:before{content:"";position:absolute;top:0;right:0;bottom:0;left:0;background:linear-gradient(to bottom,transparent 60%,rgba(26,23,20,.05))}.book-cover:after{content:"";position:absolute;left:8px;top:0;bottom:0;width:2px;background:linear-gradient(to bottom,#1a17141a,#1a171433)}.book-info{padding-top:.5rem}.book-info h3{font-family:var(--font-display);font-size:1.1rem;font-weight:400;margin-bottom:.375rem;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;letter-spacing:-.01em}.book-info p{font-size:.75rem;color:var(--ink-muted);text-transform:uppercase;letter-spacing:.08em}.book-progress{margin-top:1rem;height:3px;background:#1a17140f;border-radius:2px;overflow:hidden}.book-progress-bar{height:100%;background:linear-gradient(90deg,var(--accent-vermillion),var(--accent-rust));border-radius:2px;transition:width .4s ease}.empty-state{grid-column:1 / -1;text-align:center;padding:6rem 2rem}.empty-icon{font-size:5rem;display:block;margin-bottom:1.5rem;filter:grayscale(.4);opacity:.6}.empty-state p{font-family:var(--font-display);font-size:1.25rem;color:var(--ink-muted);font-style:italic}.reader-header{display:flex;align-items:center;gap:1.5rem;margin-bottom:2rem;padding-bottom:1.5rem;border-bottom:1px solid rgba(26,23,20,.08)}.back-btn{background:none;border:none;color:var(--ink-muted);cursor:pointer;font-size:.85rem;padding:.5rem 0;font-family:var(--font-body);display:flex;align-items:center;gap:.5rem;transition:color .2s}.back-btn:hover{color:var(--accent-vermillion)}.reader-header h2{flex:1;font-family:var(--font-display);font-size:1.75rem;font-weight:400;letter-spacing:-.02em}.reader-controls{display:flex;gap:.75rem}.reader-controls button{background:var(--bg-card);border:1px solid rgba(26,23,20,.12);color:var(--ink-warm);padding:.625rem 1.25rem;border-radius:6px;cursor:pointer;font-size:.8rem;font-family:var(--font-body);font-weight:500;transition:all .2s ease;box-shadow:var(--shadow-soft)}.reader-controls button:hover{border-color:var(--accent-vermillion);color:var(--accent-vermillion)}.adapt-btn{background:var(--accent-vermillion)!important;border-color:var(--accent-vermillion)!important;color:#fff!important}.adapt-btn:hover{background:var(--accent-rust)!important;border-color:var(--accent-rust)!important;transform:translateY(-1px);box-shadow:0 4px 12px #e84c304d!important}.reader-container{display:grid;grid-template-columns:220px 1fr 280px;gap:2rem;height:calc(100vh - 180px)}.reader-sidebar{background:var(--bg-card);border-radius:12px;padding:1.5rem;overflow-y:auto;border:1px solid rgba(26,23,20,.06);box-shadow:var(--shadow-soft)}.reader-sidebar h3{font-size:.7rem;color:var(--ink-muted);text-transform:uppercase;letter-spacing:.15em;margin-bottom:1.25rem;font-weight:600}.chapter-list{list-style:none}.chapter-list li{padding:.75rem 1rem;border-radius:6px;cursor:pointer;font-size:.85rem;color:var(--ink-muted);transition:all .2s ease;margin-bottom:.25rem;border-left:2px solid transparent}.chapter-list li:hover{background:var(--highlight);color:var(--ink-warm)}.chapter-list li.active{background:var(--highlight);color:var(--accent-vermillion);border-left-color:var(--accent-vermillion);font-weight:500}.reader-content{background:var(--bg-card);border-radius:12px;padding:3rem;overflow-y:auto;line-height:1.9;font-size:1.05rem;border:1px solid rgba(26,23,20,.06);box-shadow:var(--shadow-soft)}.reader-content h3{font-family:var(--font-display);font-size:1.5rem;margin-bottom:1.5rem;color:var(--ink-black)}.reader-content p{margin-bottom:1.25rem;color:var(--ink-warm)}.content-adapted{border-left:3px solid var(--accent-vermillion);padding-left:2rem;margin-left:-2rem}.content-adapted h4{color:var(--accent-vermillion);font-size:.75rem;font-family:var(--font-mono);text-transform:uppercase;letter-spacing:.1em;margin-bottom:1.5rem;font-weight:500}.hidden{display:none}.reader-notes{background:var(--bg-card);border-radius:12px;padding:1.5rem;display:flex;flex-direction:column;border:1px solid rgba(26,23,20,.06);box-shadow:var(--shadow-soft)}.reader-notes h3{font-size:.7rem;color:var(--ink-muted);text-transform:uppercase;letter-spacing:.15em;margin-bottom:1.25rem;font-weight:600}#bookNotes{flex:1;overflow-y:auto;margin-bottom:1rem}.note-item{background:var(--bg-base);padding:1rem;border-radius:8px;margin-bottom:.75rem;font-size:.85rem;line-height:1.6;border-left:2px solid var(--accent-gold)}.note-item .note-time{font-size:.65rem;color:var(--ink-muted);margin-top:.75rem;font-family:var(--font-mono);text-transform:uppercase;letter-spacing:.05em}#noteInput{background:var(--bg-base);border:1px solid rgba(26,23,20,.1);border-radius:8px;padding:1rem;color:var(--ink-black);font-family:var(--font-body);font-size:.85rem;resize:none;height:100px;margin-bottom:.75rem;transition:border-color .2s}#noteInput:focus{outline:none;border-color:var(--accent-vermillion)}#saveNote{background:linear-gradient(135deg,var(--accent-vermillion),var(--accent-rust));border:none;color:#fff;padding:.75rem 1.5rem;border-radius:6px;cursor:pointer;font-size:.8rem;font-family:var(--font-body);font-weight:500;transition:all .2s ease}#saveNote:hover{transform:translateY(-1px);box-shadow:0 4px 12px #e84c3040}.notes-list{display:grid;grid-template-columns:repeat(auto-fill,minmax(320px,1fr));gap:1.5rem}.note-card{background:var(--bg-card);border-radius:12px;padding:1.75rem;border:1px solid rgba(26,23,20,.06);box-shadow:var(--shadow-soft);transition:all .3s ease}.note-card:hover{box-shadow:var(--shadow-lifted);transform:translateY(-2px)}.note-card h4{font-family:var(--font-display);font-size:1rem;margin-bottom:.75rem;color:var(--ink-black)}.note-card p{color:var(--ink-warm);font-size:.9rem;line-height:1.7;margin-bottom:1rem}.note-card small{font-size:.7rem;color:var(--ink-muted);font-family:var(--font-mono);text-transform:uppercase;letter-spacing:.05em}.loading{display:flex;align-items:center;justify-content:center;padding:3rem;color:var(--ink-muted);font-size:.9rem}.loading:after{content:"";width:18px;height:18px;border:2px solid rgba(26,23,20,.1);border-top-color:var(--accent-vermillion);border-radius:50%;animation:spin .7s linear infinite;margin-left:.75rem}@keyframes spin{to{transform:rotate(360deg)}}.adapted-section{margin-bottom:2.5rem}.adapted-section h5{color:var(--accent-vermillion);font-size:.7rem;font-family:var(--font-mono);text-transform:uppercase;letter-spacing:.12em;margin-bottom:1rem;font-weight:500}.tldr{background:linear-gradient(135deg,var(--highlight),rgba(212,168,83,.08));border-radius:8px;padding:1.5rem;margin-bottom:2rem;border-left:3px solid var(--accent-gold)}.tldr p{font-family:var(--font-display);font-size:1.1rem;font-style:italic;line-height:1.7}.key-points{list-style:none;margin-bottom:2rem}.key-points li{padding:.75rem 0 .75rem 2rem;position:relative;border-bottom:1px solid rgba(26,23,20,.05)}.key-points li:last-child{border-bottom:none}.key-points li:before{content:"→";position:absolute;left:0;color:var(--accent-vermillion);font-weight:600}@media (max-width: 1200px){.reader-container{grid-template-columns:1fr 280px}.reader-sidebar{display:none}}@media (max-width: 1024px){.sidebar{width:80px;padding:1.5rem .75rem}.logo{font-size:1.25rem;text-align:center}.logo-sub{display:none}.nav-item{justify-content:center;padding:.875rem}.nav-item span:not(.nav-icon){display:none}.upload-text,.upload-hint{display:none}.main{margin-left:80px;padding:2rem}.view-header h1{font-size:2rem}.reader-container{grid-template-columns:1fr}.reader-notes{display:none}}@media (max-width: 640px){.search-box input{width:200px}.view-header{flex-direction:column;align-items:flex-start;gap:1rem}.book-grid{grid-template-columns:repeat(auto-fill,minmax(160px,1fr));gap:1rem}}::-webkit-scrollbar{width:8px;height:8px}::-webkit-scrollbar-track{background:transparent}::-webkit-scrollbar-thumb{background:#1a171426;border-radius:4px}::-webkit-scrollbar-thumb:hover{background:#1a171440}::selection{background:var(--highlight);color:var(--ink-black)}.diagram-container{background:var(--bg-cream);border-radius:12px;padding:1.5rem;margin:1rem 0;overflow-x:auto;border:1px solid rgba(26,23,20,.08)}.diagram-container svg{width:100%;height:auto;max-height:400px;display:block}.concepts-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(180px,1fr));gap:1rem;margin:1rem 0}.concept-card{background:var(--bg-cream);border-radius:10px;padding:1.25rem;border:1px solid rgba(26,23,20,.06);transition:all .2s ease}.concept-card:hover{transform:translateY(-2px);box-shadow:var(--shadow-soft)}.concept-icon{width:48px;height:48px;margin-bottom:.75rem;display:flex;align-items:center;justify-content:center}.concept-icon svg{width:100%;height:100%}.concept-card h6{font-family:var(--font-display);font-size:.95rem;font-weight:400;margin-bottom:.5rem;color:var(--ink-black)}.concept-card p{font-size:.8rem;color:var(--ink-muted);line-height:1.5;margin:0}.questions-list{list-style:none;margin:1rem 0}.questions-list li{padding:.875rem 1rem .875rem 2.5rem;background:var(--bg-cream);border-radius:8px;margin-bottom:.5rem;font-size:.9rem;color:var(--ink-warm);position:relative;font-style:italic}.questions-list li:before{content:"?";position:absolute;left:1rem;top:50%;transform:translateY(-50%);color:var(--accent-vermillion);font-weight:600;font-style:normal;font-family:var(--font-display)}.adapted-text{line-height:1.9;color:var(--ink-warm)}.adapted-text p{margin-bottom:1rem}