@import"https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800&family=Literata:ital,opsz,wght@0,7..72,200..900;1,7..72,200..900&family=EB+Garamond:ital,wght@0,400..800;1,400..800&family=JetBrains+Mono:wght@400;500&display=swap";:root{--bg-primary: #0a0e1a;--bg-secondary: #111827;--bg-card: rgba(17, 24, 39, .7);--bg-glass: rgba(30, 41, 59, .5);--bg-hover: rgba(99, 102, 241, .08);--bg-input: rgba(30, 41, 59, .6);--accent-indigo: #6366f1;--accent-indigo-light: #818cf8;--accent-violet: #8b5cf6;--accent-emerald: #10b981;--accent-amber: #f59e0b;--accent-rose: #f43f5e;--accent-sky: #38bdf8;--text-primary: #f1f5f9;--text-secondary: #94a3b8;--text-muted: #64748b;--border-subtle: rgba(148, 163, 184, .1);--border-accent: rgba(99, 102, 241, .3);--reader-bg-paper: #ffffff;--reader-bg-panel: #fcfcfc;--reader-text-ink: #1a1a1a;--reader-text-muted: #8e8e93;--reader-border: rgba(0, 0, 0, .05);--reader-accent: #007aff;--reader-sepia-bg: #f4ecd8;--reader-sepia-panel: #efe7d0;--reader-sepia-text: #5b4636;--reader-sepia-border: rgba(91, 70, 54, .1);--gradient-brand: linear-gradient(135deg, #6366f1 0%, #8b5cf6 50%, #a78bfa 100%);--gradient-card: linear-gradient(145deg, rgba(30, 41, 59, .6) 0%, rgba(17, 24, 39, .8) 100%);--gradient-glow: radial-gradient(600px circle at var(--mouse-x, 50%) var(--mouse-y, 50%), rgba(99, 102, 241, .06), transparent 40%);--shadow-sm: 0 1px 3px rgba(0, 0, 0, .3);--shadow-md: 0 4px 16px rgba(0, 0, 0, .4);--shadow-lg: 0 8px 32px rgba(0, 0, 0, .5);--shadow-glow: 0 0 20px rgba(99, 102, 241, .15);--radius-sm: 8px;--radius-md: 12px;--radius-lg: 16px;--radius-xl: 24px;--navbar-height: 64px;--font-sans: "Inter", -apple-system, BlinkMacSystemFont, sans-serif;--font-serif: "Literata", "EB Garamond", Georgia, serif;--font-mono: "JetBrains Mono", monospace}*,*:before,*:after{margin:0;padding:0;box-sizing:border-box}html{font-size:16px;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;overflow-y:scroll;scrollbar-gutter:stable}body{font-family:var(--font-sans);background:var(--bg-primary);color:var(--text-primary);line-height:1.6;min-height:100vh}#root{min-height:100vh;display:flex;flex-direction:column}a{color:var(--accent-indigo-light);text-decoration:none;transition:color .2s}a:hover{color:var(--accent-violet)}::-webkit-scrollbar{width:6px;height:6px}::-webkit-scrollbar-track{background:transparent}::-webkit-scrollbar-thumb{background:var(--text-muted);border-radius:3px}::-webkit-scrollbar-thumb:hover{background:var(--text-secondary)}@keyframes fadeIn{0%{opacity:0;transform:translateY(8px)}to{opacity:1;transform:translateY(0)}}@keyframes slideInLeft{0%{opacity:0;transform:translate(-16px)}to{opacity:1;transform:translate(0)}}@keyframes 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24px}.navbar{position:fixed;top:0;left:0;right:0;height:var(--navbar-height);display:flex;align-items:center;justify-content:center;background:#0a0e1ad9;-webkit-backdrop-filter:blur(20px) saturate(1.4);backdrop-filter:blur(20px) saturate(1.4);border-bottom:1px solid var(--border-subtle);z-index:100}.navbar-inner{width:100%;max-width:1400px;margin:0 auto;padding:0 24px;display:flex;align-items:center;justify-content:space-between}.navbar-brand,.navbar-brand:hover,.navbar-brand:visited,.navbar-brand:active,.navbar-brand:focus{text-decoration:none;color:var(--text-primary)}.navbar-brand{display:flex;align-items:center;gap:0;font-family:var(--font-serif);font-size:1.35rem;font-weight:700;letter-spacing:-.02em}.navbar-brand .wordmark-full{color:var(--text-primary);background:linear-gradient(135deg,#f59e0b,#db2777,#7c3aed);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}.navbar-nav{display:flex;align-items:center;gap:8px}.nav-link{display:flex;align-items:center;gap:6px;padding:8px 16px;border-radius:var(--radius-sm);color:var(--text-secondary);font-size:.875rem;font-weight:500;transition:all .2s;cursor:pointer}.nav-link:hover,.nav-link.active{color:var(--text-primary);background:var(--bg-hover)}.nav-link.active{color:var(--accent-indigo-light)}.user-avatar-circle{width:32px;height:32px;border-radius:50%;background:var(--gradient-brand);display:flex;align-items:center;justify-content:center;font-size:.85rem;font-weight:700;color:#fff;-webkit-user-select:none;user-select:none;transition:box-shadow .2s}.user-avatar-circle:hover{box-shadow:0 0 0 2px var(--accent-indigo-light)}.user-dropdown-menu{position:absolute;top:40px;right:0;background:#1e293b;border:1px solid rgba(148,163,184,.15);border-radius:12px;padding:8px;width:260px;box-shadow:0 12px 32px #0006;z-index:1000}.user-dropdown-header{display:flex;align-items:center;gap:10px;padding:8px}.user-dropdown-avatar{width:36px;height:36px;border-radius:50%;background:var(--gradient-brand);display:flex;align-items:center;justify-content:center;font-size:.9rem;font-weight:700;color:#fff;flex-shrink:0}.user-dropdown-identity{min-width:0}.user-dropdown-name{font-weight:600;font-size:.9rem;color:var(--text-primary);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.user-dropdown-email{font-size:.75rem;color:var(--text-muted);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.user-dropdown-divider{height:1px;background:var(--border-color);margin:4px 0}.user-dropdown-item{display:flex;align-items:center;gap:8px;width:100%;padding:8px;border:none;background:transparent;color:var(--text-primary);font-size:.85rem;border-radius:6px;cursor:pointer;transition:background 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ease;white-space:nowrap}.btn-primary{background:var(--gradient-brand);color:#fff;box-shadow:var(--shadow-sm),0 0 16px #6366f133;background-size:200% 200%}.btn-primary:hover{box-shadow:var(--shadow-md),0 0 24px #6366f14d;animation:gradientShift 3s ease infinite;transform:translateY(-1px)}.btn-secondary{background:var(--bg-glass);color:var(--text-primary);border:1px solid var(--border-subtle)}.btn-secondary:hover{border-color:var(--border-accent);background:var(--bg-hover)}.btn-ghost{background:transparent;color:var(--text-secondary);padding:8px 12px}.btn-ghost:hover{color:var(--text-primary);background:var(--bg-hover)}.btn-sm{padding:6px 12px;font-size:.8rem}.btn-lg{padding:14px 28px;font-size:1rem}.btn-author{background:linear-gradient(135deg,#6366f126,#8b5cf626);color:var(--accent-indigo-light);border:1px solid rgba(99,102,241,.3)}.btn-author:hover,.btn-author.active{background:linear-gradient(135deg,#6366f14d,#8b5cf64d);box-shadow:0 0 16px #6366f133}.btn-detractor{background:linear-gradient(135deg,#f43f5e26,#f59e0b26);color:var(--accent-rose);border:1px solid rgba(244,63,94,.3)}.btn-detractor:hover,.btn-detractor.active{background:linear-gradient(135deg,#f43f5e4d,#f59e0b4d);box-shadow:0 0 16px #f43f5e33}.btn-debate{background:linear-gradient(135deg,#10b981,#059669);color:#fff;box-shadow:0 0 16px #10b98133}.btn-debate:hover{box-shadow:0 0 24px #10b9814d;transform:translateY(-1px)}.input{width:100%;padding:10px 16px;background:var(--bg-input);border:1px solid var(--border-subtle);border-radius:var(--radius-sm);color:var(--text-primary);font-family:var(--font-sans);font-size:.875rem;transition:all .2s;outline:none}.input:focus{border-color:var(--accent-indigo);box-shadow:0 0 0 3px #6366f11a}.input::placeholder{color:var(--text-muted)}.badge{display:inline-flex;align-items:center;gap:4px;padding:3px 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0}.dashboard-header{display:flex;align-items:center;justify-content:space-between;margin-bottom:24px;gap:16px;flex-wrap:wrap}.dashboard-header-left{display:flex;flex-direction:column;gap:2px}.library-book-count{font-size:.82rem;color:var(--text-muted);font-weight:400;letter-spacing:.01em}.dashboard-header-right{display:flex;align-items:center;gap:10px;flex-wrap:wrap}.library-add-book-btn{display:inline-flex;align-items:center;gap:6px;padding:6px 14px;font-size:.82rem;font-weight:500;border-radius:8px;white-space:nowrap;transition:background .15s,border-color .15s}.dashboard-stats{display:none}.dashboard-stats{display:flex;gap:8px}.stat-chip{display:flex;align-items:center;gap:6px;padding:6px 14px;background:var(--bg-glass);border:1px solid var(--border-subtle);border-radius:100px;font-size:.8rem;color:var(--text-secondary)}.stat-chip .stat-value{font-weight:700;color:var(--text-primary)}.books-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(200px,1fr));gap:40px 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.upload-step-label{color:var(--accent-indigo-light)}.upload-step.done .upload-step-label{color:#10b981}.upload-step-line{flex:1;height:2px;background:#94a3b826;min-width:32px;align-self:flex-start;margin-top:14px;transition:background .4s}.upload-step-line.done{background:#10b981}.upload-progress-bar{width:100%;max-width:380px;height:3px;background:#94a3b81a;border-radius:3px;overflow:hidden;margin-top:8px}.upload-progress-bar-fill{height:100%;background:linear-gradient(90deg,var(--accent-indigo),#22d3ee);border-radius:3px;animation:progress-shimmer 2s ease-in-out infinite;width:40%}@keyframes progress-shimmer{0%{transform:translate(-100%)}to{transform:translate(350%)}}@keyframes upload-ring-pulse{0%,to{transform:scale(1);opacity:.4}50%{transform:scale(1.25);opacity:.15}}@keyframes toast-slide-in{0%{transform:translateY(16px) scale(.97);opacity:0}to{transform:translateY(0) scale(1);opacity:1}}@keyframes 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.landing-nav-brand{background:linear-gradient(135deg,#d97706,#db2777,#7c3aed);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}[data-theme=light] .landing-feature-card{background:var(--bg-secondary);border-color:var(--border-subtle);box-shadow:var(--shadow-sm)}[data-theme=light] .landing-feature-card:hover{border-color:var(--accent-indigo)}[data-theme=light] .landing-step{background:var(--bg-secondary);border-color:var(--border-subtle)}[data-theme=light] .landing-final-cta-inner{background:linear-gradient(135deg,#6366f10f,#8b5cf60a);border-color:var(--border-subtle)}[data-theme=light] .landing-lang-dropdown{background:#fffffff5;border-color:var(--border-subtle);box-shadow:0 8px 24px #0000001a}[data-theme=light] .landing-lang-option{color:var(--text-primary)}[data-theme=light] .landing-lang-option:hover{background:#00000008}[data-theme=light] .science-pillar-card{background:var(--bg-secondary);border-color:var(--border-subtle);box-shadow:var(--shadow-sm)}[data-theme=light] .science-pillar-card:hover{border-color:#6366f14d}[data-theme=light] .science-pillar-detail{background:#6366f108}[data-theme=light] .science-pillar-number{color:#0000000f}[data-theme=light] .btn-ghost{color:var(--text-secondary)}[data-theme=light] .btn-ghost:hover{background:#0000000a;color:var(--text-primary)}[data-theme=light] ::-webkit-scrollbar-track{background:var(--bg-primary)}[data-theme=light] ::-webkit-scrollbar-thumb{background:#94a3b84d}[data-theme=light] ::-webkit-scrollbar-thumb:hover{background:#94a3b880}.feedback-popover{position:fixed;bottom:24px;right:24px;width:340px;background:var(--bg-secondary, #111827);border:1px solid var(--border-subtle, rgba(148, 163, 184, .1));border-radius:16px;box-shadow:0 16px 48px #0006;z-index:9998;padding:16px;animation:slideUp .2s ease}@keyframes 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#6366f1);color:var(--accent-indigo-light, #818cf8);font-weight:600}.feedback-textarea{display:block;width:100%;padding:10px 12px;background:var(--bg-input, rgba(30, 41, 59, .6));border:1px solid var(--border-subtle, rgba(148, 163, 184, .1));border-radius:10px;color:var(--text-primary, #f1f5f9);font-size:.85rem;font-family:var(--font-sans);resize:vertical;min-height:80px;outline:none;transition:border-color .15s;margin-bottom:10px}.feedback-textarea:focus{border-color:var(--accent-indigo, #6366f1)}.feedback-textarea::placeholder{color:var(--text-muted, #64748b)}.feedback-submit{display:flex;align-items:center;gap:6px;margin-left:auto}.feedback-success{text-align:center;padding:24px 12px}.feedback-success span{font-size:2rem;display:block;margin-bottom:8px}.feedback-success p{color:var(--text-secondary, #94a3b8);font-size:.88rem;line-height:1.5;margin:0}[data-theme=light] .feedback-popover{background:var(--bg-secondary);border-color:var(--border-subtle);box-shadow:0 16px 48px 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#64748b);font-size:1.05rem;line-height:1.6;margin-bottom:40px;max-width:460px}.contact-cards{display:flex;flex-direction:column;gap:14px;width:100%}.contact-card{display:flex;align-items:center;gap:16px;padding:20px 24px;background:#ffffff08;border:1px solid var(--border-subtle, rgba(148, 163, 184, .1));border-radius:14px;text-decoration:none;transition:all .2s ease;cursor:pointer}.contact-card:hover{background:#ffffff0f;border-color:var(--accent-indigo, #6366f1);transform:translateY(-2px);box-shadow:0 8px 24px #6366f11a}.contact-card-icon{width:48px;height:48px;border-radius:12px;display:flex;align-items:center;justify-content:center;flex-shrink:0}.contact-card-body{text-align:left}.contact-card-body h3{font-size:.95rem;font-weight:600;color:var(--text-primary, #f1f5f9);margin:0 0 4px}.contact-card-body span{font-size:.82rem;color:var(--text-muted, #64748b)}[data-theme=light] .contact-title{background:linear-gradient(135deg,#1e293b,#475569);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}[data-theme=light] .contact-card{background:#00000005}[data-theme=light] .contact-card:hover{background:#0000000a;box-shadow:0 8px 24px #6366f114}[data-theme=light] .contact-icon-circle{background:linear-gradient(135deg,#6366f11a,#8b5cf60f)}.coach-mark-bubble{position:absolute;top:-80px;right:-20px;background:var(--accent-indigo);color:#fff;padding:14px 18px;border-radius:12px;width:260px;box-shadow:0 10px 25px #6366f166;animation:float-coach 3s ease-in-out infinite,scaleIn .3s cubic-bezier(.175,.885,.32,1.275) forwards;z-index:100;pointer-events:auto}.coach-mark-bubble:after{content:"";position:absolute;bottom:-8px;left:40px;border-width:8px 8px 0;border-style:solid;border-color:var(--accent-indigo) transparent transparent 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solid var(--border-subtle);font-size:.82rem;font-style:italic;color:var(--text-muted);border-left:3px solid var(--accent-primary)}}.lang-split-toast{position:fixed;top:calc(var(--navbar-height, 64px) + 12px);right:20px;z-index:9999;display:flex;align-items:flex-start;gap:12px;padding:14px 16px;max-width:360px;width:calc(100vw - 40px);background:#111827d9;backdrop-filter:blur(16px);-webkit-backdrop-filter:blur(16px);border:1px solid rgba(99,102,241,.25);border-radius:var(--radius-md, 12px);box-shadow:0 8px 32px #00000073,0 0 0 1px #6366f114;animation:lang-toast-in .28s cubic-bezier(.16,1,.3,1) forwards;font-family:var(--font-sans, "Inter", sans-serif)}.lang-split-toast.exiting{animation:lang-toast-out .22s ease-in forwards}.lang-split-toast-text{font-size:.8rem;font-weight:400;color:var(--text-secondary, #94a3b8);line-height:1.55;flex:1;letter-spacing:.01em}.lang-split-toast-dismiss{background:none;border:none;color:var(--text-muted, 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.quiz-history-answer-item{background:#00000004}.quiz-history-drawer[data-quiz-theme=light] .quiz-history-node-label{color:#000000a6}.quiz-history-drawer[data-quiz-theme=light] .quiz-history-user-answer{color:#00000073}.quiz-history-drawer[data-quiz-theme=light] .quiz-history-feedback{color:#0000004d;border-top-color:#0000000a}.quiz-history-drawer[data-quiz-theme=light] .quiz-history-detail-unavailable{color:#0000004d}.quiz-history-drawer[data-quiz-theme=warm] .quiz-history-panel{border-top-color:#65503212}.quiz-history-drawer[data-quiz-theme=warm] .quiz-history-session-label{color:#50371e80}.quiz-history-drawer[data-quiz-theme=warm] .quiz-history-date,.quiz-history-drawer[data-quiz-theme=warm] .quiz-history-empty{color:#50371e4d}.quiz-history-drawer[data-quiz-theme=warm] .quiz-history-calibration{color:#50371e40}.quiz-history-drawer[data-quiz-theme=warm] .quiz-history-spinner{color:#50371e33}.quiz-history-drawer[data-quiz-theme=warm] .quiz-history-score.score-zero{color:#50371e4d}.quiz-history-drawer[data-quiz-theme=warm] .quiz-history-item{border-color:#65503214;background:#65503204}.quiz-history-drawer[data-quiz-theme=warm] .quiz-history-item-clickable:hover{background:#6550320d}.quiz-history-drawer[data-quiz-theme=warm] .quiz-history-item-clickable:active{background:#65503217}.quiz-history-drawer[data-quiz-theme=warm] .quiz-history-expand-indicator{color:#50371e4d}.quiz-history-drawer[data-quiz-theme=warm] .quiz-history-item-clickable:hover .quiz-history-expand-indicator{color:#50371e99}.quiz-history-drawer[data-quiz-theme=warm] .quiz-history-expand-btn{color:#50371e4d}.quiz-history-drawer[data-quiz-theme=warm] .quiz-history-expand-btn:hover{color:#50371eb3;background:#6550320d}.quiz-history-drawer[data-quiz-theme=warm] .quiz-history-answers{border-top-color:#6550320f}.quiz-history-drawer[data-quiz-theme=warm] .quiz-history-answer-item{background:#65503204}.quiz-history-drawer[data-quiz-theme=warm] .quiz-history-node-label{color:#50371ea6}.quiz-history-drawer[data-quiz-theme=warm] .quiz-history-user-answer{color:#50371e73}.quiz-history-drawer[data-quiz-theme=warm] .quiz-history-feedback{color:#50371e4d;border-top-color:#6550320a}.quiz-history-drawer[data-quiz-theme=warm] .quiz-history-detail-unavailable{color:#50371e4d}.settings-billing-hidden{display:flex;flex-direction:column;align-items:center;text-align:center;gap:.75rem;padding:2.5rem 1.5rem}.billing-hidden-icon{font-size:2.5rem;line-height:1}.settings-billing-hidden h4{font-family:var(--font-serif);font-size:1.125rem;font-weight:700;color:var(--text-primary);margin:0}.settings-billing-hidden p{font-size:.9375rem;color:var(--text-secondary);line-height:1.6;margin:0;max-width:360px}.billing-waitlist-link{display:inline-block;margin-top:.5rem;font-size:.9375rem;font-weight:600;color:var(--accent-violet);text-decoration:none;transition:opacity .2s}.billing-waitlist-link:hover{opacity:.8;text-decoration:underline}.wl-hero{padding-top:56px;padding-bottom:24px}.wl-subtitle{max-width:520px;margin:0 auto}.wl-card-wrap{position:relative;z-index:1;display:flex;justify-content:center;padding:0 24px 80px}.wl-form{background:#ffffff0e;border:1px solid rgba(255,255,255,.13);border-radius:16px;padding:2.5rem 2.25rem;width:100%;max-width:440px;display:flex;flex-direction:column;gap:1.125rem;backdrop-filter:blur(16px);-webkit-backdrop-filter:blur(16px);box-shadow:0 8px 40px #00000059,0 1px #ffffff12 inset}.wl-field{display:flex;flex-direction:column;gap:.45rem}.wl-field label{font-size:.8125rem;font-weight:600;color:var(--text-secondary);letter-spacing:0;text-transform:none}.wl-input{background:#ffffff0d;border:1px solid rgba(255,255,255,.12);border-radius:8px;padding:.8125rem 1rem;font-size:.9375rem;font-family:var(--font-sans);color:var(--text-primary);transition:border-color .2s,box-shadow .2s;outline:none;width:100%;box-sizing:border-box;-webkit-appearance:none}.wl-input:focus{border-color:#6366f199;box-shadow:0 0 0 3px #6366f11f,0 1px 3px #0003 inset}.wl-select{cursor:pointer}.wl-select option{background:var(--bg-primary);color:var(--text-primary)}.wl-error{font-size:.8125rem;color:#f87171;margin:0}.wl-submit{width:100%;justify-content:center;margin-top:.25rem;padding:13px 32px!important;border-radius:10px!important;font-size:.9375rem!important}.wl-signin-hint{text-align:center;font-size:.8125rem;color:var(--text-secondary);margin:0}.wl-link{background:none;border:none;padding:0;font-size:inherit;color:#818cf8;cursor:pointer;text-decoration:underline}.wl-success{text-align:center;max-width:400px;display:flex;flex-direction:column;align-items:center;gap:1rem;padding:2.5rem 1.5rem;animation:wl-fade-in .4s ease}.wl-success-icon{width:60px;height:60px;border-radius:50%;background:linear-gradient(135deg,#6366f1,#8b5cf6);color:#fff;font-size:1.75rem;display:flex;align-items:center;justify-content:center}.wl-success-title{font-family:var(--font-serif);font-size:1.875rem;font-weight:700;color:var(--text-primary);margin:0;letter-spacing:-.02em}.wl-success-body{color:var(--text-secondary);line-height:1.65;margin:0;font-size:1rem}.wl-back-btn{margin-top:.5rem;color:var(--text-secondary)}@keyframes wl-fade-in{0%{opacity:0;transform:translateY(10px)}to{opacity:1;transform:translateY(0)}}[data-theme=light] .wl-form{background:#ffffffb3;border-color:#00000014}[data-theme=light] .wl-input{background:#ffffffe6;border-color:#0000001f;color:var(--text-primary)}@media(max-width:768px){.navbar-brand .wordmark-full{display:none}.navbar-nav{gap:4px}.navbar-nav .nav-link{padding:8px 10px;font-size:.82rem}.navbar-inner{padding:0 16px}}