:root{--bg: #FAF6F2;--surface: #FFFDFC;--surface-2: #F5EDE7;--surface-3: #EFE6DD;--border: #E8E1DA;--border-strong: #CFC6E8;--text: #2F3550;--text-2: #5F647A;--text-3: #8A8FA3;--accent: #6E5FB0;--accent-hover: #5E4F9F;--accent-light: #EAE2F4;--brand: #F3A38E;--brand-hover: #F8B9A8;--brand-light: #FBE4DC;--danger: #C24A3A;--danger-light: #F7DDD7;--success: #6FA85F;--reader-bg: #FAF6F2;--radius-sm: 8px;--radius: 12px;--radius-lg: 18px;--radius-xl: 24px;--radius-pill: 999px;--shadow-sm: 0 1px 3px rgba(0,0,0,.06), 0 1px 2px rgba(0,0,0,.04);--shadow: 0 4px 16px rgba(0,0,0,.07);--shadow-lg: 0 8px 40px rgba(0,0,0,.1);--shadow-1: 0 1px 2px rgba(0,0,0,.04), 0 1px 3px rgba(0,0,0,.06);--shadow-2: 0 4px 6px rgba(0,0,0,.05), 0 10px 15px rgba(0,0,0,.08);--complement: #c8a86b;--complement-soft: #f5eedc;--space-1: 4px;--space-2: 8px;--space-3: 12px;--space-4: 16px;--space-6: 24px;--space-8: 32px;--space-12: 48px;--space-16: 64px;--text-xs: 12px;--text-sm: 14px;--text-base: 16px;--text-md: 18px;--text-lg: 20px;--text-xl: 24px;--text-2xl: 32px;--text-3xl: 48px;--weight-regular: 400;--weight-medium: 500;--weight-bold: 700;font-family:Inter,system-ui,sans-serif;color:var(--text);background:var(--bg);-webkit-font-smoothing:antialiased}[data-theme=dark]{--bg: #111113;--surface: #1c1c1f;--surface-2: #232326;--surface-3: #2c2c30;--border: #2e2e33;--border-strong: #404047;--text: #e8e3dc;--text-2: #8f8b84;--text-3: #5c5955;--accent: #9A8FD4;--accent-hover: #8B7FCB;--accent-light: #2A2440;--brand: #F3A38E;--brand-hover: #F8B9A8;--brand-light: #3A2218;--danger: #E07A66;--danger-light: #2d1515;--success: #8BC07C;--complement: #c8a86b;--complement-soft: #3a2f1a;--shadow-1: 0 1px 2px rgba(0,0,0,.25), 0 1px 3px rgba(0,0,0,.35);--shadow-2: 0 4px 6px rgba(0,0,0,.3), 0 10px 15px rgba(0,0,0,.4);color-scheme:dark}body{margin:0}.card{background:var(--surface);border:1px solid 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var(--space-3)}.auth-switch{margin:0;text-align:center;font-size:var(--text-sm);color:var(--text-2)}.auth-switch-btn{background:none;border:none;padding:0;color:var(--accent);font-size:var(--text-sm);cursor:pointer;font-weight:var(--weight-medium)}.auth-switch-btn:hover{text-decoration:underline}.auth-modal-backdrop{position:fixed;inset:0;z-index:200;background:#00000080;backdrop-filter:blur(4px);display:flex;align-items:center;justify-content:center;padding:var(--space-4)}.auth-modal-backdrop .auth-screen{min-height:unset;background:none;padding:0}.auth-card{position:relative}.auth-modal-close{position:absolute;top:var(--space-4);right:var(--space-4);background:none;border:none;font-size:var(--text-md);cursor:pointer;color:var(--text-3);line-height:1;padding:var(--space-1)}.auth-modal-close:hover{color:var(--text)}.onboarding-screen{min-height:100vh;background:var(--bg);display:flex;justify-content:center;padding:var(--space-12) var(--space-6) 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var(--border);border-radius:999px;padding:var(--space-2) var(--space-3);font-size:var(--text-sm);color:var(--text-2);cursor:pointer;transition:border-color .12s,background .12s,color .12s}.lang-chip:hover{border-color:var(--border-strong);color:var(--text)}.lang-chip--selected{background:var(--accent-light);border-color:var(--accent);color:var(--accent);font-weight:var(--weight-medium)}.lang-chip--target{background:var(--accent);border-color:var(--accent);color:#fff;font-weight:var(--weight-medium)}.lang-flag{font-size:var(--text-base);line-height:1}.lang-name{line-height:1}.onboarding-cta{align-self:flex-start;width:auto;padding:var(--space-3) var(--space-8);font-size:var(--text-base);border-radius:var(--radius-lg)}.onboarding-actions{display:flex;gap:var(--space-3);align-items:center}.onboarding-turnstile{display:flex;justify-content:center;margin-bottom:var(--space-4)}.onboarding-back{padding:var(--space-3) 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var(--border);border-radius:var(--radius);padding:var(--space-3) var(--space-4);cursor:pointer;transition:border-color .12s,background .12s,transform .12s}.proficiency-card:hover{border-color:var(--border-strong);transform:translateY(-1px)}.proficiency-card--selected{background:var(--accent);border-color:var(--accent)}.proficiency-card--selected .proficiency-card-label,.proficiency-card--selected .proficiency-card-desc{color:#fff}.proficiency-card-label{font-size:var(--text-base);font-weight:var(--weight-medium);color:var(--text);line-height:1.3}.proficiency-card-desc{font-size:var(--text-sm);color:var(--text-2);line-height:1.3}.proficiency-preview-wrap{margin-top:var(--space-2);display:flex;flex-direction:column;gap:var(--space-2)}.proficiency-preview-label{font-size:var(--text-sm);margin:0}.onboarding-celebration{display:flex;align-items:center;justify-content:center;min-height:200px}.book-placeholder{width:100%;height:100%;display:flex;flex-direction:column;align-items:center;justify-content:center;padding:var(--space-3);text-align:center;gap:var(--space-1)}.book-placeholder-title{font-size:var(--text-xs);font-weight:var(--weight-bold);line-height:1.2;display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden}.book-placeholder-author{font-size:var(--text-xs);opacity:.7}.library-header{display:flex;align-items:baseline;justify-content:space-between;margin-bottom:var(--space-6)}.library-header h1{margin:0;font-size:var(--text-xl);font-weight:var(--weight-bold);letter-spacing:-.02em}.upload-form{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-lg);padding:var(--space-8);margin-bottom:var(--space-8);box-shadow:var(--shadow-sm)}.upload-form h2{margin:0 0 var(--space-6);font-size:var(--text-base);font-weight:var(--weight-medium);color:var(--text)}.upload-form-fields{display:grid;grid-template-columns:1fr 1fr;gap:var(--space-3)}.upload-form-fields input,.upload-form-fields select{width:100%;box-sizing:border-box}.upload-form-fields .span-2{grid-column:span 2}.file-drop-zone{grid-column:span 2;border:2px dashed var(--border);border-radius:var(--radius);padding:var(--space-6);text-align:center;cursor:pointer;transition:border-color .15s,background .15s;background:var(--bg);position:relative}.file-drop-zone:hover{border-color:var(--accent);background:var(--accent-light)}.file-drop-zone input[type=file]{position:absolute;inset:0;opacity:0;cursor:pointer;width:100%;height:100%}.file-drop-zone-icon{font-size:var(--text-xl);margin-bottom:var(--space-2)}.file-drop-zone-label{font-size:var(--text-sm);color:var(--text-2)}.file-drop-zone-label strong{color:var(--accent)}.file-drop-zone--filled{border-color:var(--success);background:#e5ebe0}.file-drop-zone--filled .file-drop-zone-label{color:var(--success)}.file-drop-zone--dragging{border-color:var(--accent);background:var(--accent-light);transform:scale(1.01)}.upload-error{color:var(--danger);font-size:var(--text-sm);margin:0;padding:var(--space-2) var(--space-3);background:var(--danger-light);border-radius:var(--radius-sm);border:1px solid color-mix(in srgb,var(--danger) 20%,transparent)}.upload-meta-fields{grid-column:span 2;display:flex;flex-direction:column;gap:var(--space-3)}.upload-field-wrap{position:relative;display:flex;align-items:center}.upload-field-wrap input{width:100%;box-sizing:border-box;padding-right:var(--space-8)}.upload-detecting-spinner{position:absolute;right:var(--space-3);width:14px;height:14px;border:2px solid var(--border);border-top-color:var(--accent);border-radius:50%;animation:upload-spin .7s linear infinite;flex-shrink:0;pointer-events:none}@keyframes upload-spin{to{transform:rotate(360deg)}}.upload-lang-row{grid-column:span 2;display:grid;grid-template-columns:1fr auto 1fr;gap:var(--space-2);align-items:end}.upload-lang-field{display:flex;flex-direction:column;gap:var(--space-1)}.upload-lang-label{font-size:var(--text-xs);font-weight:var(--weight-medium);color:var(--text-2);text-transform:uppercase;letter-spacing:.04em}.upload-lang-arrow{font-size:var(--text-md);color:var(--text-3);padding-bottom:var(--space-2)}.upload-lang-row select{width:100%;box-sizing:border-box}.upload-submit{grid-column:span 2;background:var(--brand);color:#fff;border:none;border-radius:var(--radius);padding:var(--space-3);font-size:var(--text-base);font-weight:var(--weight-medium);width:100%;margin-top:var(--space-1)}.upload-submit:hover:not(:disabled){background:var(--brand-hover)}.upload-status{grid-column:span 2;display:flex;align-items:center;gap:var(--space-3);font-size:var(--text-sm);color:var(--text-2);padding:var(--space-3) var(--space-4);background:var(--surface-2);border-radius:var(--radius-sm)}.books-section h2{font-size:var(--text-base);font-weight:var(--weight-medium);color:var(--text);margin:0}.library-header{display:flex;align-items:center;justify-content:space-between;gap:var(--space-4);flex-wrap:wrap;margin-bottom:var(--space-6)}.library-header h2{margin:0;display:flex;align-items:center;gap:var(--space-2)}.library-book-count{display:inline-flex;align-items:center;justify-content:center;background:var(--surface-2);border:1px solid var(--border);color:var(--text-2);font-size:var(--text-xs);font-weight:var(--weight-medium);border-radius:999px;padding:var(--space-1) var(--space-2);line-height:1.6}.library-header-actions{display:flex;align-items:center;gap:var(--space-3);flex-wrap:wrap}.library-add-btn{background:var(--brand);color:#fff;border:none;box-shadow:0 1px 4px #f3a38e52;border-radius:var(--radius);padding:var(--space-2) var(--space-4);font-size:var(--text-sm);font-weight:var(--weight-medium);cursor:pointer;transition:background .15s,transform .15s,box-shadow .15s}.library-add-btn:hover{background:var(--brand-hover);transform:translateY(-1px);box-shadow:0 3px 10px #e98e765c}.library-add-btn--open{background:var(--surface-2);color:var(--text-2);border:1px solid var(--border)}.library-add-btn--open:hover{background:var(--surface-3);color:var(--text)}.library-form-panel{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-lg);padding:var(--space-6) var(--space-6);margin-bottom:var(--space-6);box-shadow:var(--shadow-sm)}.library-controls{display:flex;align-items:center;gap:var(--space-2);flex-wrap:wrap}.library-controls>.hint-wrap{display:inline-flex;align-items:center}.library-search{padding:var(--space-1) var(--space-3);border:1px solid var(--border);border-radius:var(--radius-sm);background:var(--surface-2);color:var(--text);font-size:var(--text-sm);width:180px;outline:none}.library-search:focus{border-color:var(--accent)}.library-sort{padding:var(--space-1) var(--space-2);border:1px solid var(--border);border-radius:var(--radius-sm);background:var(--surface-2);color:var(--text);font-size:var(--text-sm);cursor:pointer;outline:none}.library-lang-filters{display:flex;gap:var(--space-1);flex-wrap:wrap}.library-lang-filters>.hint-wrap{display:inline-flex;align-items:center}.lang-filter-chip{padding:var(--space-1) var(--space-2);border:1px solid var(--border);border-radius:999px;background:transparent;color:var(--text-2);font-size:var(--text-xs);cursor:pointer;transition:background .15s,color .15s,border-color .15s}.lang-filter-chip:hover{border-color:var(--accent);color:var(--accent);background:var(--accent-light)}.lang-filter-chip--active{background:var(--accent);border-color:var(--accent);color:#fff}.library-group{margin-bottom:var(--space-6)}.library-group-label{font-size:var(--text-xs);font-weight:var(--weight-medium);text-transform:uppercase;letter-spacing:.06em;color:var(--text-2);margin:0 0 var(--space-3);display:flex;align-items:center;gap:var(--space-2)}.library-group-label:before{content:"";display:inline-block;width:3px;height:12px;background:var(--accent);border-radius:2px;flex-shrink:0}.books-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(200px,1fr));gap:var(--space-4)}.book-card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-lg);padding:var(--space-6) var(--space-6);box-shadow:var(--shadow-sm);display:flex;flex-direction:column;gap:var(--space-3);transition:box-shadow .15s,border-color .15s,transform .15s;position:relative}.book-card:hover{box-shadow:var(--shadow);border-color:var(--border-strong);transform:translateY(-2px)}.book-card-delete-icon{position:absolute;top:var(--space-3);right:var(--space-3);width:1.75rem;height:1.75rem;display:flex;align-items:center;justify-content:center;background:transparent;border:none;border-radius:var(--radius-sm);color:var(--text-3);cursor:pointer;opacity:0;transition:opacity .15s,background .15s,color .15s;padding:0}.book-card:hover .book-card-delete-icon{opacity:1}.book-card-delete-icon:hover{background:var(--danger-light);color:var(--danger)}.book-card--tour .book-card-delete-icon,.book-card--tour .book-card-cover-icon{opacity:1}.book-card-title{font-size:var(--text-base);font-weight:var(--weight-bold);color:var(--text);line-height:1.3;margin:0}.book-card-title-input{font:inherit;font-size:var(--text-base);font-weight:var(--weight-bold);color:var(--text);line-height:1.3;width:100%;margin:0;padding:0 .25rem;margin-left:-.25rem;background:var(--surface-2);border:1px solid var(--accent);border-radius:var(--radius-sm);outline:none;box-shadow:0 0 0 3px color-mix(in srgb,var(--accent) 15%,transparent)}.book-card-author{font-size:var(--text-sm);color:var(--text-2)}.book-card-footer{display:flex;align-items:center;justify-content:space-between;margin-top:auto;padding-top:var(--space-2);border-top:1px solid var(--border)}.book-card-status{font-size:var(--text-xs);color:var(--text-3);display:flex;align-items:center;gap:var(--space-1)}.book-card-status--ready{color:var(--success);font-weight:var(--weight-medium)}.book-card-status--failed{color:var(--danger)}.book-card-error{font-size:.75rem;color:var(--text-3);margin:.25rem 0 .5rem;line-height:1.4;max-height:3em;overflow:hidden;display:-webkit-box;-webkit-box-orient:vertical;-webkit-line-clamp:2}.book-card--processing{border-color:var(--accent);background:var(--surface-2);position:relative;animation:library-processing-pulse 2.4s ease-in-out infinite}@keyframes library-processing-pulse{0%,to{box-shadow:0 0 0 1px var(--accent),0 1px 4px #0000000a}50%{box-shadow:0 0 0 2px var(--accent),0 4px 14px #00000014}}.book-card--uploading{border-color:var(--border-strong);border-style:dashed;background:var(--surface-2);opacity:.9}.book-card-upload-icon{width:2.2rem;height:2.2rem;color:var(--accent);opacity:.6}.book-card-upload-icon svg{width:100%;height:100%}.book-progress{margin-top:auto;padding-top:var(--space-3);display:flex;flex-direction:column;gap:var(--space-2)}.book-progress-track{width:100%;height:5px;background:var(--border);border-radius:999px;overflow:hidden}.book-progress-fill{height:100%;background:linear-gradient(90deg,var(--brand-hover),var(--brand));border-radius:999px;transition:width 1.2s cubic-bezier(.4,0,.2,1);position:relative}.book-progress-fill:after{content:"";position:absolute;inset:0;background:linear-gradient(90deg,transparent 0%,rgba(255,255,255,.45) 50%,transparent 100%);animation:progress-shimmer 1.6s ease-in-out infinite}@keyframes progress-shimmer{0%{transform:translate(-100%)}to{transform:translate(200%)}}.book-progress-fill--indeterminate{width:40%!important;animation:progress-indeterminate 1.4s ease-in-out infinite}@keyframes progress-indeterminate{0%{transform:translate(-100%)}to{transform:translate(300%)}}.book-progress-header{display:flex;justify-content:space-between;align-items:baseline}.book-progress-pct{font-size:var(--text-xs);color:var(--text-2);font-weight:var(--weight-medium);font-variant-numeric:tabular-nums}.book-progress-label{font-size:var(--text-xs);color:var(--text-2);font-weight:var(--weight-medium);letter-spacing:.01em}.book-card-actions{display:flex;gap:var(--space-2);align-items:center}.book-open-link{background:var(--brand);color:#fff;text-decoration:none;font-size:var(--text-sm);font-weight:var(--weight-medium);padding:var(--space-2) var(--space-4);border-radius:var(--radius-sm);transition:background .12s}.book-open-link:hover{background:var(--brand-hover)}.book-card-progress{margin:var(--space-2) 0 0}.book-card-progress-bar-row{display:flex;justify-content:space-between;align-items:center;margin-bottom:var(--space-1)}.book-card-progress-label{font-size:var(--text-xs);color:var(--text-2);font-weight:var(--weight-medium)}.book-card-progress-track{height:4px;background:var(--surface-2);border-radius:999px;overflow:hidden}.book-card-progress-fill{height:100%;background:var(--brand);border-radius:999px;transition:width .3s ease}.book-card-confirm{display:flex;align-items:center;gap:var(--space-2);flex:1}.book-card-confirm-label{font-size:var(--text-sm);color:var(--text-2);flex:1}.book-card--ready{padding:0;overflow:hidden;display:flex;flex-direction:column}.book-cover{display:flex;flex-direction:column;text-decoration:none;width:100%;aspect-ratio:2 / 3;position:relative;overflow:hidden;flex-shrink:0;background:var(--surface-2);transition:filter .15s}.book-cover:hover{filter:brightness(1.08)}.book-cover--image{background:var(--border)}.book-cover--image:hover{filter:brightness(.95)}.book-cover-img{width:100%;height:100%;object-fit:cover;display:block}.book-cover-stripe{position:absolute;inset:0;background:repeating-linear-gradient(135deg,transparent,transparent 18px,currentColor 18px,currentColor 19px);opacity:.18;pointer-events:none}.book-card-meta{padding:var(--space-3) var(--space-4) var(--space-3);display:flex;flex-direction:column;gap:var(--space-1);flex:1}.book-card--ready .book-card-title{margin:0;font-size:var(--text-sm);font-weight:var(--weight-medium);color:var(--text)}.book-card--ready .book-card-author{font-size:var(--text-sm);color:var(--text-2)}.book-card-confirm--overlay{position:absolute;inset:0;background:var(--brand-light);display:flex;flex-direction:column;align-items:center;justify-content:center;gap:var(--space-4);padding:var(--space-4);z-index:10;border-radius:var(--radius-lg);flex:unset;text-align:center;animation:book-card-confirm-rise .22s cubic-bezier(.22,1,.36,1) both}@keyframes book-card-confirm-rise{0%{opacity:0;transform:scale(.985)}to{opacity:1;transform:scale(1)}}.book-card-confirm--overlay .book-card-confirm-label{font-family:EB Garamond,"Noto Serif SC","Noto Serif JP","Noto Serif KR",Noto Naskh Arabic,"Noto Serif Devanagari",Georgia,serif;font-size:var(--text-base);color:var(--text-2);font-weight:var(--weight-regular);flex:unset;line-height:1.35;margin:0}.book-card-confirm-title{display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;margin-top:4px;font-style:italic;font-weight:var(--weight-medium);font-size:var(--text-lg);color:var(--text);line-height:1.2}.book-card-confirm-actions{display:flex;gap:var(--space-2)}.btn-sm{padding:var(--space-1) var(--space-3);font-size:var(--text-sm);border-radius:6px}.book-card--deleting>*:not(.book-card-deleted-canvas){opacity:.28;pointer-events:none;transition:opacity .2s ease}.book-card-deleted-canvas{position:absolute;inset:0;pointer-events:none;z-index:12;border-radius:var(--radius-lg)}.library-welcome{text-align:center;padding:var(--space-12) var(--space-6);border:2px dashed var(--border);border-radius:var(--radius-lg);margin-top:var(--space-2)}.library-welcome-icon{color:var(--accent);opacity:.6;margin-bottom:var(--space-3)}.library-welcome-strip{display:flex;justify-content:center;margin-bottom:var(--space-6)}.library-welcome-strip canvas{max-width:100%;display:block}.library-welcome-title{font-size:var(--text-md);font-weight:var(--weight-bold);color:var(--text-1);margin:0 0 var(--space-2)}.library-welcome-sub{font-size:var(--text-sm);color:var(--text-2);line-height:1.6;max-width:420px;margin:0 auto}.library-welcome-browse{display:inline-block;margin-top:var(--space-4);font-size:var(--text-sm);color:var(--accent);text-decoration:underline;text-underline-offset:2px}.library-welcome-browse:hover{opacity:.8}.empty-teaser{max-width:520px;margin:0 auto}.empty-teaser-sentence{margin:0 0 var(--space-6);text-align:center;font-size:var(--text-md);color:var(--text);line-height:1.4}.empty-teaser-word{display:inline-block;vertical-align:top;margin:0 6px var(--space-2) 6px;text-align:center}.empty-teaser-source{display:block;font-weight:var(--weight-medium)}.empty-teaser-target{display:block;margin-top:2px;min-height:1em;font-size:.72em;font-style:italic;color:var(--accent);line-height:1.2;transition:opacity .18s ease}.empty-teaser-target--hidden{opacity:0}.empty-teaser-controls{display:flex;align-items:center;justify-content:center;gap:var(--space-2);font-size:var(--text-xs);color:var(--text-2)}.empty-teaser-icon{display:inline-flex;line-height:1}.empty-teaser-icon--on{color:var(--accent)}.empty-teaser-icon--off{color:var(--text-3)}.empty-teaser-slider{width:140px;accent-color:var(--accent);cursor:pointer}.book-card-cover-icon{position:absolute;top:var(--space-3);left:var(--space-3);width:1.75rem;height:1.75rem;display:flex;align-items:center;justify-content:center;background:#00000073;border:none;border-radius:var(--radius-sm);color:#fff;cursor:pointer;opacity:0;transition:opacity .15s,background .15s,transform .1s;padding:0;z-index:2}.book-card:hover .book-card-cover-icon,.book-card-cover-icon:focus-visible{opacity:1}@media(hover:none){.book-card-cover-icon{opacity:1}}.book-card-cover-icon:hover{background:var(--brand)}.book-card-cover-icon:active{transform:scale(.92)}.book-card-actions-toggle{position:absolute;top:var(--space-3);right:var(--space-3);width:2rem;height:2rem;display:none;align-items:center;justify-content:center;padding:0;border:none;border-radius:var(--radius-sm);background:#00000073;color:#fff;font-size:var(--text-base);line-height:1;z-index:3}.book-card-actions-toggle:active{transform:scale(.92)}@media(hover:none){.book-card-actions-toggle{display:flex}}.book-card--tour .book-card-actions-toggle{display:none}.book-cover-generating{position:absolute;inset:0;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:var(--space-3);background:#12121a6b;backdrop-filter:blur(7px) saturate(.9);-webkit-backdrop-filter:blur(7px) saturate(.9);color:#fff;pointer-events:none;z-index:3;animation:cover-fade-in .25s ease-out}.book-cover-generating .cover-spinner{width:2rem;height:2rem;border-color:#ffffff4d;border-top-color:#fff}.book-cover-generating-label{font-size:.78rem;font-weight:500;letter-spacing:.02em;text-shadow:0 1px 2px rgba(0,0,0,.45)}.book-cover-generating--exiting{animation:cover-fade-out .5s ease forwards}@keyframes cover-fade-in{0%{opacity:0}to{opacity:1}}@keyframes cover-fade-out{0%{opacity:1}to{opacity:0}}.cover-dialog-overlay{position:fixed;inset:0;background:#00000080;display:flex;align-items:center;justify-content:center;z-index:100;padding:var(--space-4)}.cover-dialog{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-lg);box-shadow:var(--shadow);width:100%;max-width:440px;max-height:90vh;overflow-y:auto}.cover-dialog-header{display:flex;align-items:center;justify-content:space-between;padding:var(--space-4) var(--space-4) var(--space-3);border-bottom:1px solid var(--border)}.cover-dialog-title{margin:0;font-size:1.05rem}.cover-dialog-close{background:transparent;border:none;font-size:1.4rem;line-height:1;color:var(--text-3);cursor:pointer;padding:0 var(--space-1)}.cover-dialog-close:hover{color:var(--text-1)}.cover-dialog-body{padding:var(--space-4);display:flex;flex-direction:column;gap:var(--space-3)}.cover-dialog-hint{color:var(--text-2);font-size:.85rem;margin:0}.cover-dialog-gift{color:var(--brand);font-size:.88rem;font-weight:600;margin:0}.cover-dialog-error{color:var(--danger);font-size:.85rem;margin:0}.cover-dialog-upsell{align-items:flex-start}.cover-generate-btn{margin-top:var(--space-1)}.cover-variant-row{display:flex;gap:var(--space-3)}.cover-variant{flex:1;display:flex;flex-direction:column;gap:var(--space-2);align-items:center;padding:var(--space-2);background:transparent;border:1.5px solid var(--border);border-radius:var(--radius);cursor:pointer}.cover-variant:hover:not(:disabled){border-color:var(--border-strong)}.cover-variant--active{border-color:var(--brand);background:var(--brand-light);cursor:default}.cover-variant:disabled{cursor:default}.cover-variant-img,.cover-variant-placeholder{width:100%;aspect-ratio:2 / 3;object-fit:cover;border-radius:var(--radius-sm);background:var(--surface-2)}.cover-variant-label{font-size:.8rem;color:var(--text-2)}.cover-dialog-generating{align-items:center;text-align:center;padding:var(--space-8) var(--space-4)}.cover-spinner{width:2.25rem;height:2.25rem;border:3px solid var(--border);border-top-color:var(--brand);border-radius:50%;animation:cover-spin .8s linear infinite}@keyframes cover-spin{to{transform:rotate(360deg)}}[data-theme=dark] .interlinear-gloss{color:#c8a86b}.reader-scroll{background:var(--reader-bg);min-height:calc(100vh - 60px);padding-bottom:120px;position:relative}.reader-progress-bar{position:fixed;top:0;left:0;height:3px;background:var(--accent);opacity:.5;z-index:250;transition:width .3s ease-out}.reader-popover-backdrop{position:fixed;inset:0;z-index:209}.reader-prose{max-width:960px;margin:0 auto;padding:var(--space-12) var(--space-8);font-size:18px;line-height:2.3}.reader-prose--page-mode{padding:0 var(--space-8);height:calc(100vh - 3.5rem);overflow:hidden;display:flex;flex-direction:column}.page-turn-container{flex:1;position:relative;display:flex;flex-direction:column;min-height:0}.page-turn-content{flex:1;padding:var(--space-6) 0;overflow:hidden}.page-turn-loading{display:flex;align-items:center;justify-content:center;color:var(--muted)}.page-turn-prev,.page-turn-next{position:fixed;top:50%;transform:translateY(-50%);background:var(--surface, rgba(255,255,255,.9));border:1px solid var(--border, rgba(0,0,0,.1));border-radius:8px;padding:var(--space-3) var(--space-2);cursor:pointer;opacity:.3;transition:opacity .2s;z-index:200;color:var(--text, #333)}.page-turn-prev:hover,.page-turn-next:hover{opacity:1}.page-turn-prev{left:max(var(--space-2),calc((100vw - 960px) / 2 - var(--space-12)))}.page-turn-next{right:max(5rem,calc((100vw - 960px) / 2 - var(--space-12)))}.page-turn-prev:disabled,.page-turn-next:disabled{opacity:.1;cursor:default}.page-turn-content[data-direction=next]{animation:page-slide-left .2s ease-out}.page-turn-content[data-direction=prev]{animation:page-slide-right .2s ease-out}@keyframes page-slide-left{0%{opacity:.5;transform:translate(30px)}to{opacity:1;transform:translate(0)}}@keyframes page-slide-right{0%{opacity:.5;transform:translate(-30px)}to{opacity:1;transform:translate(0)}}.page-turn-columns{display:flex;height:100%;align-items:flex-start}.page-turn-column{flex:1;min-width:0;overflow:hidden}@media(max-width:700px){.page-turn-prev,.page-turn-next{top:auto;bottom:5rem;transform:none}.page-turn-prev{left:var(--space-3)}.page-turn-next{right:var(--space-3)}}.chapter-sidebar-toggle{position:fixed;top:.75rem;left:.75rem;z-index:220;display:inline-flex;align-items:center;justify-content:center;gap:.4rem;height:38px;padding:0 .85rem 0 .7rem;border-radius:999px;border:1px solid var(--border, rgba(0,0,0,.12));background:var(--surface, #fff);color:var(--text, #333);font-size:.86rem;font-weight:600;cursor:pointer;box-shadow:0 2px 10px #0000001a;transition:transform .18s ease,background .18s ease,box-shadow .18s ease}.chapter-sidebar-toggle:hover{background:var(--surface-2, #f3f4f6);box-shadow:0 4px 14px #00000026}.chapter-sidebar-toggle-label{white-space:nowrap}.chapter-sidebar-toggle--open{transform:translate(284px);width:38px;padding:0;justify-content:center}.chapter-sidebar-backdrop{position:fixed;inset:0;background:#0000;z-index:210}.chapter-sidebar{position:fixed;top:0;left:0;width:320px;max-width:85vw;height:100vh;background:var(--surface, #fff);border-right:1px solid var(--border, rgba(0,0,0,.08));box-shadow:4px 0 14px #0000000f;z-index:215;transform:translate(-100%);transition:transform .22s cubic-bezier(.22,1,.36,1);display:flex;flex-direction:column;overflow:hidden}.chapter-sidebar--open{transform:translate(0)}.chapter-sidebar-header{padding:1rem 1.25rem .75rem 3.25rem;font-size:.85rem;font-weight:var(--weight-medium);color:var(--muted, #666);text-transform:uppercase;letter-spacing:.08em;border-bottom:1px solid var(--border, rgba(0,0,0,.08))}.chapter-sidebar-list{flex:1;overflow-y:auto;padding:.5rem 0;display:flex;flex-direction:column}.chapter-sidebar-entry{display:flex;align-items:baseline;justify-content:space-between;gap:.75rem;width:100%;text-align:left;border:none;background:transparent;color:var(--text, #333);font-family:inherit;font-size:.92rem;line-height:1.35;padding:.45rem 1.25rem;cursor:pointer;border-left:2px solid transparent;transition:background .12s ease,border-color .12s ease,color .12s ease}.chapter-sidebar-entry:hover{background:var(--surface-2, rgba(0,0,0,.04))}.chapter-sidebar-entry--active{border-left-color:var(--accent, #c97a3a);color:var(--accent, #c97a3a);font-weight:var(--weight-medium);background:var(--surface-2, rgba(0,0,0,.03))}.chapter-sidebar-entry--h1{font-weight:var(--weight-bold);font-size:.95rem;text-transform:uppercase;letter-spacing:.04em;margin-top:.5rem}.chapter-sidebar-entry--h2{padding-left:2rem}.chapter-sidebar-entry--h3{padding-left:2.75rem;font-size:.88rem}.chapter-sidebar-entry-text{display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}.chapter-sidebar-entry-page{flex-shrink:0;font-size:.78rem;color:var(--text-3, #999);font-variant-numeric:tabular-nums}[data-theme=dark] .chapter-sidebar-toggle{background:#282830eb}[data-theme=dark] .chapter-sidebar{background:var(--surface, #1a1c24)}.reader-tour{position:fixed;inset:0;z-index:9000;pointer-events:auto}.reader-tour-backdrop{position:fixed;background:#14161e2e;backdrop-filter:blur(5px);-webkit-backdrop-filter:blur(5px);animation:reader-tour-fade .2s ease-out}.reader-tour-backdrop--full{inset:0}.reader-tour-spotlight{position:fixed;border-radius:10px;box-shadow:0 0 0 2px var(--accent, #c97a3a),0 0 24px 4px #c97a3a59;pointer-events:none;transition:top .2s ease,left .2s ease,width .2s ease,height .2s ease;animation:reader-tour-spotlight-in .22s ease-out}.reader-tour-label{position:fixed;background:var(--surface, #fff);color:var(--text, #222);border-radius:12px;padding:1rem 1.25rem;box-shadow:0 10px 30px #00000040;animation:reader-tour-fade .22s ease-out}.reader-tour-label--centered{top:50%;left:50%;transform:translate(-50%,-50%);width:min(360px,calc(100vw - 32px))}.reader-tour-title{font-size:.95rem;font-weight:var(--weight-bold);margin:0 0 .4rem;letter-spacing:-.01em}.reader-tour-body{font-size:.88rem;color:var(--text-2, #555);line-height:1.45;margin:0 0 .9rem}.reader-tour-footer{display:flex;align-items:center;justify-content:space-between;gap:.75rem}.reader-tour-progress{font-size:.78rem;color:var(--text-3, #888);font-variant-numeric:tabular-nums}.reader-tour-actions{display:flex;gap:.5rem}.reader-tour-skip,.reader-tour-back,.reader-tour-next{font-family:inherit;font-size:.85rem;padding:.4rem .8rem;border-radius:7px;cursor:pointer;border:1px solid transparent}.reader-tour-skip{background:transparent;color:var(--text-3, #888)}.reader-tour-skip:hover{color:var(--text, #333)}.reader-tour-back{background:transparent;border-color:var(--border, rgba(0,0,0,.12));color:var(--text-2, #555)}.reader-tour-back:hover{background:var(--surface-2, rgba(0,0,0,.04))}.reader-tour-next{background:var(--accent, #c97a3a);color:#fff;font-weight:var(--weight-medium);border-color:var(--accent, #c97a3a)}.reader-tour-next:hover{opacity:.92}@keyframes reader-tour-fade{0%{opacity:0}to{opacity:1}}@keyframes reader-tour-spotlight-in{0%{opacity:0;transform:scale(.96)}to{opacity:1;transform:scale(1)}}[data-theme=dark] .reader-tour-label{background:#232730;color:#e8e8ea}.reader-controls-cluster{display:contents}.reader-controls-cluster--hidden{display:none}.reader-controls-more--active{color:var(--accent)}.reader-book-title-header{text-align:center;margin:var(--space-12) auto var(--space-12);max-width:34em}.reader-book-title{font-family:inherit;font-size:clamp(1.7em,5.5vw,2.5em);line-height:1.15;font-weight:var(--weight-bold);letter-spacing:.01em;color:var(--text);margin:0}.reader-book-title-author{font-size:.95em;letter-spacing:.18em;text-transform:uppercase;color:var(--text);opacity:.62;margin:var(--space-4) 0 0}.reader-book-title-rule{display:flex;align-items:center;justify-content:center;gap:var(--space-4);margin-top:var(--space-6);color:var(--border-strong);font-size:1.1em}.reader-book-title-rule:before,.reader-book-title-rule:after{content:"";height:1px;width:64px;background:currentColor}.reader-heading{font-family:inherit;color:var(--text);line-height:1.3;margin:0 0 var(--space-4);font-weight:var(--weight-medium);letter-spacing:-.01em;text-align:center}.reader-heading--h1{margin-top:var(--space-12);margin-bottom:var(--space-6);padding-bottom:var(--space-4);border-bottom:1px solid var(--border-strong, rgba(0,0,0,.1));font-weight:var(--weight-bold);letter-spacing:.02em;text-transform:uppercase;font-size:1.5em}.reader-heading--h2{font-size:1.45em;margin-top:var(--space-12);margin-bottom:var(--space-4);font-weight:var(--weight-medium)}.reader-heading--h3{font-size:1.2em;margin-top:var(--space-8);margin-bottom:var(--space-4)}.reader-heading--h4,.reader-heading--h5,.reader-heading--h6{font-size:1.05em;font-style:italic;margin-top:var(--space-8);font-weight:var(--weight-medium)}.sentence-wrapper{display:block;margin-bottom:var(--space-4)}.reader-prose .interlinear-sentence{display:flex}.reader-prose .interlinear-sentence--pretext{display:block}.reader-status{text-align:center;margin-top:5rem;color:var(--text-2);font-size:var(--text-base)}.reader-status-detail{margin-top:.75rem;font-size:.8rem;color:var(--text-3);max-width:40rem;margin-left:auto;margin-right:auto}.reader-skeleton{max-width:720px;margin:var(--space-12) auto;padding:0 var(--space-6);display:flex;flex-direction:column;gap:var(--space-4)}.reader-skeleton-line{height:1.4rem;border-radius:6px;background:var(--surface-2)}.reader-resume-banner{display:flex;align-items:center;justify-content:space-between;gap:var(--space-4);padding:var(--space-2) var(--space-4);margin-bottom:var(--space-8);background:#0000000a;border-radius:var(--radius-sm);font-size:var(--text-sm);color:var(--text-2)}.reader-resume-restart{background:none;border:none;padding:0;color:var(--accent);font-size:var(--text-sm);cursor:pointer;text-decoration:underline;text-underline-offset:2px;white-space:nowrap}.reader-resume-dismiss{background:none;border:none;padding:0 var(--space-1);color:var(--text-3);font-size:var(--text-xs);cursor:pointer;line-height:1;margin-left:auto}.reader-resume-dismiss:hover{color:var(--text-1)}.tts-tip-banner{display:flex;align-items:center;gap:var(--space-3);padding:var(--space-2) var(--space-4);margin-bottom:var(--space-8);background:var(--accent-light, rgba(99,102,241,.08));border-left:3px solid var(--accent);border-radius:var(--radius-sm);font-size:var(--text-sm);color:var(--text-2);animation:tip-fade-in .4s ease}@keyframes tip-fade-in{0%{opacity:0;transform:translateY(-4px)}to{opacity:1;transform:translateY(0)}}.tts-tip-dismiss{background:none;border:none;padding:0 var(--space-1);color:var(--text-3);font-size:var(--text-xs);cursor:pointer;margin-left:auto;flex-shrink:0}.tts-tip-dismiss:hover{color:var(--text-1)}.sentence{color:#1e1b18}.sentence-hoverable{cursor:default;border-radius:4px;transition:background .15s}.sentence-hoverable:hover{background:#fef9c3}.token{display:inline;padding:var(--space-1) var(--space-1);border-radius:3px}.token-word{cursor:pointer;transition:background .1s}.token-word:hover{background:#e0e7ff;border-radius:3px}.token-medium{color:#b45309}.token-hard{color:#7c3aed}.interlinear-sentence{display:flex;flex-wrap:wrap;align-items:flex-start;gap:0;row-gap:var(--space-3);line-height:1}.interlinear-sentence--pretext{row-gap:unset}.interlinear-line{display:flex;flex-wrap:nowrap;align-items:flex-start;gap:0;margin-bottom:var(--space-3)}.interlinear-line:last-child{margin-bottom:0}.interlinear-punct{display:inline-flex;align-items:flex-start;padding-top:var(--space-1);color:#1e1b18;font-size:inherit;margin-left:-var(--space-1);margin-right:var(--space-1)}.interlinear-token{display:inline-flex;flex-direction:column;align-items:center;cursor:pointer;border-radius:5px;padding:var(--space-1) var(--space-1);transition:background .12s;margin:0 var(--space-1)}.interlinear-token:hover{background:var(--accent-light)}.interlinear-token:hover .interlinear-gloss{opacity:1!important}.interlinear-word{color:var(--text);font-size:inherit;line-height:1.3;white-space:nowrap}.interlinear-word--highlighted{border-bottom:2px solid rgba(245,158,11,.55);padding-bottom:1px}.interlinear-word--tts-active{background:var(--accent);color:#fff;border-radius:3px;padding:0 2px;margin:0 -2px;border-bottom:none}[data-theme=dark] .interlinear-word--tts-active{background:var(--accent);color:#fff}.interlinear-gloss{font-size:.68em;color:var(--accent);font-style:italic;line-height:1.2;min-height:1em;white-space:nowrap;transition:opacity .15s;letter-spacing:.01em}.sentence-info-btn{display:inline-flex;align-items:flex-start;padding-top:var(--space-1);margin-left:var(--space-1);font-size:.72em;color:var(--text-3);cursor:default;border-radius:50%;line-height:1.3;transition:color .12s;user-select:none}.sentence-info-btn:hover{color:var(--accent)}.sentence-tts-btn{display:inline-flex;align-items:flex-start;padding-top:var(--space-1);margin-left:var(--space-1);background:none;border:none;cursor:pointer;font-size:.72em;color:var(--text-3);line-height:1.3;opacity:0;transition:opacity .15s,color .12s;user-select:none}.sentence-wrapper:hover .sentence-tts-btn{opacity:.7}.sentence-tts-btn:hover{opacity:1!important;color:var(--accent)}.sentence-tts-btn--loading{opacity:1!important;color:var(--text-2);cursor:wait}.sentence-tts-btn--playing{opacity:1!important;color:var(--accent)}.game-tts-btn{display:inline-flex;align-items:center;justify-content:center;background:none;border:none;cursor:pointer;font-size:var(--text-sm);color:var(--text-3);padding:0 var(--space-1);opacity:.5;transition:opacity .15s,color 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infinite}.reader-translating-indicator__spinner,.reader-translating-indicator__label{position:relative;z-index:1}.reader-translating-indicator__spinner{width:12px;height:12px;flex-shrink:0;border-radius:50%;border:2px solid var(--accent-light);border-top-color:var(--accent);animation:reader-spin .7s linear infinite}@keyframes reader-spin{to{transform:rotate(360deg)}}@keyframes reader-pill-sweep{0%{background-position:120% 0}to{background-position:-120% 0}}.reader-translate-hint{position:fixed;top:var(--space-4);left:50%;transform:translate(-50%);display:flex;align-items:center;gap:var(--space-2);max-width:min(92vw,460px);background:var(--accent-light);color:var(--text-1);border:1px solid var(--accent);border-radius:12px;padding:var(--space-2) var(--space-3);font-size:var(--text-sm);line-height:1.3;box-shadow:var(--shadow);z-index:40;animation:fade-up .35s ease both}.reader-translate-hint__icon{flex-shrink:0}.reader-translate-hint__text{flex:1}.reader-translate-hint__close{flex-shrink:0;margin-left:var(--space-1);padding:0 4px;background:none;border:none;cursor:pointer;color:var(--text-3);font-size:var(--text-lg);line-height:1}.reader-translate-hint__close:hover{color:var(--text-1)}@media(prefers-reduced-motion:reduce){.reader-translating-indicator:after{animation:none}.reader-translating-indicator__spinner{animation-duration:1.4s}.reader-translate-hint{animation:none}}.reader-toast{position:fixed;bottom:var(--space-4);left:50%;transform:translate(-50%);background:var(--text-1);color:var(--surface);border-radius:99px;padding:var(--space-2) var(--space-4);font-size:var(--text-sm);pointer-events:none;animation:toast-in .25s ease,toast-out .3s ease 2.1s forwards;z-index:50;white-space:nowrap}@keyframes toast-in{0%{opacity:0;transform:translate(-50%) translateY(8px)}to{opacity:1;transform:translate(-50%) translateY(0)}}@keyframes toast-out{to{opacity:0;transform:translate(-50%) translateY(4px)}}.interlinear-sentence:not(.interlinear-sentence--ready) .interlinear-token{flex-direction:row;align-items:baseline;padding:var(--space-1) var(--space-1)}.interlinear-sentence:not(.interlinear-sentence--ready) .interlinear-gloss{visibility:hidden;opacity:0}.interlinear-sentence--ready .interlinear-gloss{visibility:visible}.page-divider{display:flex;align-items:center;gap:var(--space-4);margin:var(--space-8) 0;user-select:none}.page-divider:before,.page-divider:after{content:"";flex:1;height:1px;background:linear-gradient(to right,transparent,var(--border-strong, rgba(0,0,0,.12)),transparent)}.page-divider span{font-size:var(--text-xs);letter-spacing:.3em;color:var(--muted, rgba(0,0,0,.3));text-transform:uppercase}.scroll-sentinel{height:40px;display:flex;align-items:center;justify-content:center;margin-top:var(--space-4)}.word-tooltip{position:fixed;transform:translate(-50%) translateY(calc(-100% - 10px));background:#1e1b4b;color:#e0e7ff;padding:var(--space-1) var(--space-3);border-radius:var(--radius-sm);font-size:var(--text-sm);font-weight:var(--weight-medium);pointer-events:none;z-index:300;max-width:300px;white-space:normal;text-align:center;line-height:1.4;box-shadow:0 4px 16px #00000040}.word-tooltip:after{content:"";position:absolute;top:100%;left:50%;transform:translate(-50%);border:5px solid transparent;border-top-color:#1e1b4b}.word-tooltip--selection{background:var(--accent)}.word-tooltip--selection:after{border-top-color:var(--accent)}.word-tooltip--dismissable{pointer-events:auto;cursor:pointer}.word-tooltip--word{pointer-events:auto;text-align:left;padding:var(--space-2) var(--space-3) 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1}.word-tooltip-tts--active{background:#fff3;animation:none}.word-tooltip-save,.word-tooltip-close{background:#ffffff1f;border:none;border-radius:var(--radius-sm);color:#e0e7ff;font-size:var(--text-sm);width:26px;height:26px;display:grid;place-items:center;cursor:pointer;flex-shrink:0;transition:background .12s,color .12s;padding:0}.word-tooltip-save:hover,.word-tooltip-close:hover{background:#ffffff40}.word-tooltip-save--active{color:#fde68a;background:#fde68a29}.word-tooltip-save--active:hover{background:#fde68a47}.word-tooltip-backdrop{position:fixed;inset:0;background:transparent;z-index:299}@keyframes tts-pulse{0%{box-shadow:0 0 #a5b4fcb3}60%{box-shadow:0 0 0 6px #a5b4fc00}to{box-shadow:0 0 #a5b4fc00}}.word-tooltip-translation{font-size:var(--text-sm);color:#c7d2fe;line-height:1.3}.word-tooltip-word--phrase{font-style:italic;font-size:var(--text-sm)}.word-tooltip-phrase-tag{display:inline-block;margin-right:var(--space-2);padding:0 var(--space-2);border-radius:var(--radius-sm);background:#ffffff24;color:#e0e7ff;font-size:var(--text-xs);font-weight:var(--weight-medium);text-transform:uppercase;letter-spacing:.04em;vertical-align:1px}.reader-page-indicator{display:flex;flex-direction:column;gap:var(--space-1);font-size:var(--text-xs);color:var(--text-2);background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:var(--space-1) var(--space-3) var(--space-1);font-variant-numeric:tabular-nums;user-select:none;overflow:hidden;transition:border-color .12s}.reader-page-indicator:hover{border-color:var(--accent);color:var(--text)}.reader-page-indicator-nums{display:flex;align-items:center;gap:var(--space-1)}.reader-page-indicator-sep{color:var(--text-3)}.reader-page-indicator-bar{height:2px;background:var(--accent);border-radius:1px;min-width:2px;transition:width .4s ease}.reader-jump-popover{position:absolute;right:calc(100% + var(--space-3));bottom:0;background:var(--surface);border:1px 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var(--space-2);text-align:center;display:flex;flex-direction:column;gap:var(--space-2)}.mc-word{font-size:var(--text-2xl);font-weight:var(--weight-bold);color:var(--text);font-family:var(--reader-font, inherit)}.mc-word-context{font-size:var(--text-sm);color:var(--text-3);font-style:italic;line-height:1.4}.mc-options{display:flex;flex-direction:column;gap:var(--space-2);padding:var(--space-1) var(--space-6) var(--space-2)}.mc-option{background:var(--surface-2);border:1.5px solid var(--border);border-radius:10px;padding:var(--space-3) var(--space-4);text-align:left;font-size:var(--text-sm);color:var(--text);cursor:pointer;transition:border-color .12s,background .12s}.mc-option:hover:not(:disabled){border-color:var(--accent);background:var(--accent-light)}.mc-option--correct{border-color:var(--success)!important;background:#34d3991f!important;color:var(--text)}.mc-option--wrong{border-color:var(--danger)!important;background:var(--danger-light)!important;color:var(--text)}.mc-option--dimmed{opacity:.4}.mc-feedback{display:flex;flex-direction:column;align-items:center;gap:var(--space-3);padding:var(--space-2) var(--space-6) var(--space-3);font-size:var(--text-sm)}.mc-feedback--correct{color:var(--success);font-weight:var(--weight-medium)}.mc-feedback--wrong{color:var(--danger);font-weight:var(--weight-medium)}.cloze-sentence{padding:var(--space-6) var(--space-6) var(--space-3);font-size:var(--text-base);line-height:1.7;color:var(--text);text-align:center}.cloze-context{color:var(--text)}.cloze-context--fallback{color:var(--text-2);font-style:italic}.cloze-prompt{font-size:var(--text-sm);color:var(--text-2)}.cloze-blank{display:inline-block;min-width:4rem;border-bottom:2.5px solid var(--accent);color:var(--text-3);font-style:italic;padding:0 var(--space-1);transition:color .2s,border-color .2s}.cloze-blank--correct{color:var(--success);border-color:var(--success);font-style:normal;font-weight:var(--weight-bold)}.cloze-blank--revealed{color:var(--danger);border-color:var(--danger);font-style:normal;font-weight:var(--weight-bold)}.cloze-input-row{display:flex;gap:var(--space-2);padding:0 var(--space-6) var(--space-2)}.cloze-input{flex:1;font-size:var(--text-base);border:1.5px solid var(--border);border-radius:var(--radius);padding:var(--space-3) var(--space-3);background:var(--surface);color:var(--text);outline:none;transition:border-color .15s}.cloze-input:focus{border-color:var(--accent)}.cloze-input--wrong{border-color:var(--danger);animation:shake .3s ease}.cloze-submit-btn{padding:var(--space-3) var(--space-4);font-size:var(--text-sm);flex-shrink:0}.cloze-actions{display:flex;align-items:center;justify-content:space-between;gap:var(--space-2);padding:0 var(--space-6) var(--space-2);font-size:var(--text-sm)}.cloze-reveal-btn{background:none;border:1px solid var(--border);color:var(--text-2);font-size:var(--text-sm);padding:var(--space-1) var(--space-3);cursor:pointer;border-radius:var(--radius-sm);transition:border-color .12s}.cloze-reveal-btn:hover{border-color:var(--border-strong);color:var(--text)}.cloze-translate-btn{display:inline-flex;align-items:center;background:none;border:none;padding:var(--space-1) var(--space-1);margin-left:var(--space-1);font-size:var(--text-base);cursor:pointer;opacity:.5;border-radius:var(--radius-sm);transition:opacity .15s;vertical-align:middle}.cloze-translate-btn:hover:not(:disabled){opacity:1}.cloze-translate-btn:disabled{cursor:default;opacity:.3}.cloze-translation{margin:0 var(--space-6) var(--space-2);padding:var(--space-2) var(--space-3);background:var(--surface-2);border-left:2.5px solid var(--accent);border-radius:0 var(--radius-sm) var(--radius-sm) 0;font-size:var(--text-sm);color:var(--text-2);font-style:italic;line-height:1.5}@keyframes shake{0%,to{transform:translate(0)}25%{transform:translate(-4px)}75%{transform:translate(4px)}}.cloze-translate-btn--active{opacity:1!important;color:var(--accent)}.cloze-word-hint{margin:0 var(--space-6) var(--space-2);font-size:var(--text-sm);color:var(--text-2);text-align:center}.mc-feedback-advancing{font-size:var(--text-xs);color:var(--text-3)}.mc-option-key{display:inline-flex;align-items:center;justify-content:center;width:18px;height:18px;border-radius:4px;background:var(--surface-3);color:var(--text-3);font-size:var(--text-xs);font-weight:var(--weight-bold);margin-right:var(--space-3);flex-shrink:0;vertical-align:middle}.mc-option--correct .mc-option-key,.mc-option--wrong .mc-option-key,.mc-option--dimmed .mc-option-key{opacity:0}.wp-hint-icon--active{color:var(--accent)}.grammar-instruction{font-size:var(--text-base);color:var(--text-secondary);margin:var(--space-2) 0 var(--space-4);text-align:center}.pos-sentence{display:flex;flex-wrap:wrap;gap:var(--space-2);margin:var(--space-3) 0}.pos-token{padding:var(--space-1) var(--space-2);border-radius:var(--radius-sm);border:1.5px solid var(--border);background:var(--surface-2);cursor:pointer;font-size:var(--text-base);user-select:none;transition:border-color .1s,background .1s}.pos-token:hover{border-color:var(--accent)}.pos-token--selected{background:var(--accent-light);border-color:var(--accent);color:var(--accent)}.pos-token--correct{background:#10b9811f;border-color:var(--success);color:var(--success)}.pos-token--wrong{background:var(--danger-light);border-color:var(--danger);color:var(--danger)}.pos-token--missed{background:#eab3081f;border-color:#ca8a04;color:#ca8a04}[data-theme=dark] .pos-token--missed{border-color:#facc15;color:#facc15;background:#eab30826}.grammar-feedback{margin:var(--space-3) 0 var(--space-1);font-size:var(--text-base);min-height:1.4rem}.grammar-actions{margin-top:var(--space-4);display:flex;justify-content:flex-end}.scramble-answer{min-height:3.2rem;padding:var(--space-2) var(--space-3);border:1.5px dashed var(--border-strong);border-radius:var(--radius);display:flex;flex-wrap:wrap;gap:var(--space-2);margin:var(--space-3) 0;background:var(--surface-2);align-content:flex-start}.scramble-placeholder{color:var(--text-secondary);font-size:var(--text-sm);align-self:center;padding:var(--space-1)}.scramble-pool{display:flex;flex-wrap:wrap;gap:var(--space-2);margin:var(--space-2) 0 var(--space-3)}.scramble-token{padding:var(--space-1) var(--space-2);border-radius:var(--radius-sm);border:1.5px solid var(--border);background:var(--surface-2);cursor:pointer;font-size:var(--text-base);user-select:none;transition:border-color .1s,background .1s}.scramble-token:hover{border-color:var(--accent)}.scramble-token--placed{background:var(--surface-3)}.scramble-token--correct{background:#10b9811f;border-color:var(--success);color:var(--success)}.scramble-token--wrong{background:var(--danger-light);border-color:var(--danger);color:var(--danger)}.sp-sentence{font-size:var(--text-xl);line-height:1.35;font-weight:var(--weight-medium);text-align:center;padding:var(--space-4) var(--space-2) var(--space-1);color:var(--text)}.sp-sentence--small{font-size:var(--text-base);font-weight:var(--weight-regular)}.sp-translation{font-size:var(--text-base);color:var(--text-2);text-align:center;margin-bottom:var(--space-4);font-style:italic}.sp-translation--dim{font-size:var(--text-sm);margin-top:var(--space-2)}.sp-context{text-transform:capitalize;opacity:.75}.sp-audio-row{display:flex;justify-content:center;align-items:center;gap:var(--space-3);margin:var(--space-2) 0 var(--space-4)}.sp-audio-btn{padding:var(--space-2) var(--space-4);border-radius:var(--radius-sm);border:1.5px solid var(--border);background:var(--surface-2);cursor:pointer;font-size:var(--text-base);color:var(--text);transition:border-color .12s,background .12s}.sp-audio-btn:hover{border-color:var(--accent);background:var(--surface-3)}.sp-audio-btn:disabled{opacity:.5;cursor:default}.sp-audio-btn--small{padding:var(--space-1) var(--space-3);font-size:var(--text-base)}.sp-audio-error{color:var(--danger);font-size:var(--text-sm)}.sp-shadow{padding:var(--space-2) 0 0}.sp-grade{text-align:center;padding:var(--space-4) 0}.sp-grade-buttons{display:flex;gap:var(--space-3);justify-content:center;margin-top:var(--space-3)}.sp-grade-btn{padding:var(--space-3) var(--space-6);border-radius:var(--radius-sm);border:1.5px solid var(--border);background:var(--surface-2);cursor:pointer;font-size:var(--text-base);font-weight:var(--weight-medium);color:var(--text);transition:border-color .12s,background .12s,transform .06s}.sp-grade-btn:hover{transform:translateY(-1px)}.sp-grade-btn--again{border-color:var(--danger);color:var(--danger)}.sp-grade-btn--good{border-color:var(--accent);color:var(--accent)}.sp-grade-btn--easy{border-color:var(--success);color:var(--success)}.vp-tabs{display:flex;gap:var(--space-1);margin-bottom:var(--space-3);border-bottom:1px solid var(--border);padding-bottom:0}.vp-tab{background:none;border:none;border-bottom:2px solid transparent;color:var(--text-2);font-size:var(--text-sm);font-weight:var(--weight-medium);padding:var(--space-2) var(--space-3);cursor:pointer;margin-bottom:-1px;transition:color .12s,border-color .12s;border-radius:var(--radius-sm) var(--radius-sm) 0 0}.vp-tab:hover{color:var(--text)}.vp-tab--active{color:var(--accent);border-bottom-color:var(--accent);font-weight:var(--weight-medium)}.vp-collapse-toggle{margin-left:auto;align-self:center;width:1.75rem;height:1.75rem;display:flex;align-items:center;justify-content:center;background:none;border:none;border-radius:var(--radius-sm);color:var(--text-3);cursor:pointer;padding:0;transition:background .15s,color .15s}.vp-collapse-toggle:hover{background:var(--surface-2);color:var(--text)}.vp-chevron{transition:transform .28s cubic-bezier(.22,1,.36,1)}.vp-chevron--collapsed{transform:rotate(180deg)}.vp-collapse{display:grid;grid-template-rows:1fr;transition:grid-template-rows .28s cubic-bezier(.22,1,.36,1)}.vp-collapse--collapsed{grid-template-rows:0fr}.vp-collapse-inner{overflow:hidden;min-width:0;visibility:visible;transition:visibility 0s linear}.vp-collapse--collapsed .vp-collapse-inner{visibility:hidden;transition-delay:.28s}.library-stats-bar{display:flex;gap:var(--space-3);flex-wrap:wrap;margin:0 0 var(--space-6)}.library-stat{display:inline-flex;align-items:center;gap:var(--space-1);font-size:var(--text-sm);color:var(--text-2);background:var(--surface);border:1px solid var(--border);border-radius:999px;padding:var(--space-1) var(--space-3)}.library-stat--active{color:var(--text);border-color:var(--border-strong)}.library-stat--clickable{cursor:pointer;transition:background .15s,border-color .15s}.library-stat--clickable:hover{background:var(--surface-2);border-color:var(--border-strong);color:var(--text)}.library-stat-icon{font-size:.9em;line-height:1}.points-panel{padding:0 0 var(--space-4)}.points-discount-section{display:flex;justify-content:center;margin-bottom:var(--space-6)}.points-discount-canvas{width:100%;max-width:340px;height:220px;border-radius:var(--radius)}.points-history,.points-timeline-section{margin-bottom:var(--space-6)}.points-timeline-canvas{width:100%;height:180px;touch-action:manipulation;cursor:default;margin-top:var(--space-2)}.points-history-loading,.points-history-empty{font-size:var(--text-sm);color:var(--text-3);text-align:center;padding:var(--space-4) 0}.points-history-list{display:flex;flex-direction:column;gap:var(--space-1);margin-top:var(--space-2)}.points-history-item{display:flex;align-items:center;gap:var(--space-2);padding:var(--space-2) var(--space-3);background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);font-size:var(--text-sm)}.points-history-item--redeem{opacity:.7}.points-history-reason{flex:1;color:var(--text);font-weight:var(--weight-medium)}.points-history-meta{color:var(--text-3);font-size:var(--text-xs)}.points-history-amount{font-weight:var(--weight-bold);min-width:4.5rem;text-align:right;color:var(--text-3)}.points-history-amount--earn{color:#d4a017}.points-earn-section{margin-bottom:var(--space-4)}.points-earn-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(160px,1fr));gap:var(--space-2);margin-top:var(--space-2)}.points-earn-card{padding:var(--space-2) var(--space-3);background:var(--surface);border:1px solid var(--border);border-radius:var(--radius)}.points-earn-card-header{display:flex;justify-content:space-between;align-items:baseline;margin-bottom:var(--space-1)}.points-earn-card-label{font-size:var(--text-sm);font-weight:var(--weight-medium);color:var(--text)}.points-earn-card-amount{font-size:var(--text-xs);font-weight:var(--weight-bold);color:#d4a017}.points-earn-card-desc{font-size:var(--text-xs);color:var(--text-3);line-height:1.3}.points-expiry-note{font-size:var(--text-xs);color:var(--text-3);text-align:center;margin:var(--space-4) 0 0}.vp-section{margin:0 0 var(--space-8);padding:var(--space-4) var(--space-6);background:var(--surface-2);border:1px solid var(--border);border-radius:12px}.vp-section-heading{display:flex;align-items:baseline;flex-wrap:wrap;gap:var(--space-2);font-size:var(--text-sm);font-weight:var(--weight-medium);text-transform:uppercase;letter-spacing:.07em;color:var(--text-3);margin:0 0 var(--space-3)}.vp-lang-rows{display:flex;flex-direction:column;gap:var(--space-2)}.vp-lang-row{display:flex;align-items:center;justify-content:space-between;gap:var(--space-4)}.vp-lang-row-info{display:flex;align-items:baseline;gap:var(--space-2)}.vp-lang-row-label{font-size:var(--text-base);font-weight:var(--weight-medium);color:var(--text-1)}.vp-lang-row-count{font-size:var(--text-sm);color:var(--text-2)}.vp-practice-btn{flex-shrink:0;padding:var(--space-2) var(--space-4);border-radius:8px;background:var(--brand);color:#fff;font-size:var(--text-sm);font-weight:var(--weight-medium);border:none;cursor:pointer;transition:background .15s}.vp-practice-btn:hover{background:var(--brand-hover)}.vp-practice-btn--due{background:var(--success)}.vp-practice-btn--due:hover{filter:brightness(.9)}.vp-due-badge{display:inline-flex;align-items:center;font-size:var(--text-xs);font-weight:var(--weight-medium);color:var(--success);background:color-mix(in srgb,var(--success) 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var(--space-3)}.vp-struggle-words{display:flex;flex-wrap:wrap;gap:var(--space-2);margin-bottom:var(--space-4)}.vp-struggle-chip{display:inline-flex;align-items:center;gap:var(--space-1);font-size:var(--text-sm);background:var(--surface);border:1px solid rgba(239,68,68,.3);border-radius:999px;padding:var(--space-1) var(--space-2);color:var(--text)}.vp-struggle-chip-fails{font-size:.7em;color:var(--danger);font-weight:var(--weight-medium)}.vp-struggle-btn{width:100%;justify-content:center}.srs-due-badge{display:inline-flex;align-items:center;font-size:var(--text-xs);font-weight:var(--weight-bold);letter-spacing:.02em;color:#fff;background:var(--success);border-radius:99px;padding:var(--space-1) var(--space-2);line-height:1.4}.vp-word-list{border-top:1px solid var(--border);margin-top:var(--space-4);padding-top:var(--space-3)}.vp-word-list-toggle{font-size:var(--text-sm);color:var(--text-2);cursor:pointer;list-style:none;padding:0 var(--space-6);user-select:none}.vp-word-list-toggle::-webkit-details-marker{display:none}.vp-word-list-toggle:before{content:"▸ "}details[open] .vp-word-list-toggle:before{content:"▾ "}.vp-word-list-items{list-style:none;margin:var(--space-2) 0 0;padding:0 var(--space-6);display:flex;flex-direction:column;gap:var(--space-1);max-height:180px;overflow-y:auto}.vp-word-item{display:flex;align-items:center;gap:var(--space-2);font-size:var(--text-sm)}.vp-word-item-word{font-weight:var(--weight-medium);color:var(--text-1)}.vp-word-item-sep{color:var(--text-3);font-size:var(--text-xs)}.vp-word-item-translation{color:var(--text-2);flex:1}.vp-word-item-book{font-size:var(--text-xs);color:var(--text-3);font-style:italic;max-width:120px;overflow:hidden;white-space:nowrap;text-overflow:ellipsis}.vp-word-item-tag{font-size:var(--text-xs);font-weight:var(--weight-medium);color:var(--text-3);background:var(--surface-2);border-radius:99px;padding:var(--space-1) var(--space-2);flex-shrink:0}.vp-word-item-tag--due{color:#fff;background:var(--success)}.vp-word-item-remove{background:none;border:none;color:var(--text-3);font-size:var(--text-xs);cursor:pointer;padding:var(--space-1) var(--space-1);border-radius:4px;line-height:1;opacity:.6;transition:opacity .15s,color .15s}.vp-word-item-remove:hover{opacity:1;color:var(--danger)}.fc-stage{perspective:1400px;display:flex;justify-content:center;align-items:center;padding:var(--space-6) var(--space-4)}.fc-card{position:relative;width:100%;max-width:360px;aspect-ratio:4 / 5;transform-style:preserve-3d;transition:transform .7s cubic-bezier(.22,1,.36,1);cursor:pointer;outline:none}.fc-card--flipped{transform:rotateY(180deg);cursor:default}.fc-card:focus-visible .fc-face{box-shadow:var(--shadow-lg),0 0 0 3px #f3a38e59}.fc-face{position:absolute;inset:0;backface-visibility:hidden;-webkit-backface-visibility:hidden;border-radius:var(--radius-xl);border:1px solid 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