:root{--primary: #1e3a5f;--primary-dark: #0f2238;--primary-light: #2b5282;--primary-soft: #eaf1f8;--accent: #0284c7;--accent-hover: #0369a1;--accent-soft: #e0f2fe;--accent-glow: #38bdf8;--green: #16a34a;--green-hover: #15803d;--green-soft: #dcfce7;--green-text: #14532d;--scroll-bg-normal: #86efac;--scroll-border-normal: #4ade80;--scroll-bg-hover: #fca5a5;--scroll-border-hover: #f87171;--scroll-arrow: #0f2238;--text-main: #1e293b;--text-muted: #4b5563;--text-light: #64748b;--bg-page: #f8fafc;--bg-card: #ffffff;--border: #e2e8f0;--border-dark: #cbd5e1;--shadow-sm: 0 1px 3px rgba(15, 23, 42, .08);--shadow-md: 0 4px 12px rgba(15, 23, 42, .08);--shadow-lg: 0 10px 25px rgba(15, 23, 42, .12);--shadow-xl: 0 20px 35px rgba(15, 23, 42, .18);--font-serif: "Playfair Display", Georgia, "Times New Roman", serif;--font-sans: "Inter", system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;--transition-fast: .15s ease;--transition-normal: .25s cubic-bezier(.4, 0, .2, 1);--transition-slow: .35s ease}*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}html{font-family:var(--font-sans);color:var(--text-main);background-color:var(--bg-page);line-height:1.5;scroll-behavior:smooth;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}body,#root{min-height:100vh;display:flex;flex-direction:column}.library-app{display:flex;flex-direction:column;min-height:100vh}.main-content{flex:1 0 auto}a{color:inherit;text-decoration:none;transition:color var(--transition-fast)}button{font-family:inherit;cursor:pointer;border:none;background:none;transition:all var(--transition-normal)}img{max-width:100%;height:auto;display:block}ul,ol{list-style:none}.visually-hidden{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}.site-header{width:100%;background-color:#fff;box-shadow:0 2px 10px #0f172a0d;position:sticky;top:0;z-index:100}.header-top{border-bottom:1px solid #eef2f6;padding:16px 0;background-color:#fff}.header-container{max-width:1320px;margin:0 auto;padding:0 24px;display:flex;align-items:center;justify-content:space-between;gap:20px}.author-branding{display:flex;flex-direction:column}.author-name{font-family:var(--font-serif);font-style:italic;font-weight:700;font-size:1.65rem;line-height:1.25;color:var(--primary);letter-spacing:-.01em}.author-degree{font-size:.95rem;font-weight:500;color:var(--text-muted);margin-top:3px;letter-spacing:.01em}.header-actions{display:flex;align-items:center;gap:20px;flex-wrap:wrap}.header-email{display:inline-flex;align-items:center;gap:8px;font-size:.92rem;color:var(--text-muted);font-weight:500;padding:6px 12px;border-radius:6px;background-color:#f8fafc;border:1px solid #e2e8f0}.header-email:hover{color:var(--accent);border-color:#cbd5e1;background-color:#f0f7ff}.email-icon{color:var(--accent)}.lang-switcher{display:inline-flex;align-items:center;background-color:#f1f5f9;padding:3px;border-radius:8px;border:1px solid #e2e8f0}.lang-btn{display:inline-flex;align-items:center;gap:7px;padding:6px 13px;border-radius:6px;font-size:.9rem;font-weight:600;color:var(--text-muted);background:transparent;transition:all var(--transition-fast)}.lang-btn:hover{color:var(--text-main)}.lang-btn.active{background-color:#fff;color:var(--primary);box-shadow:0 1px 3px #0000001a}.flag-icon{display:block;border-radius:2px;box-shadow:0 1px 2px #0003;flex-shrink:0}.btn-company{display:inline-flex;align-items:center;justify-content:center;background:#008744;background:linear-gradient(135deg,#059652,#007a3d);color:#fff;font-size:.95rem;font-weight:700;padding:9px 22px;border-radius:8px;box-shadow:0 3px 8px #007a3d40;transition:all var(--transition-normal)}.btn-company:hover{background:linear-gradient(135deg,#007a3d,#006030);transform:translateY(-1px);box-shadow:0 5px 12px #007a3d59;color:#fff}.main-nav{background-color:#fff;border-bottom:1px solid #e2e8f0}.nav-container{max-width:1320px;margin:0 auto;padding:0 24px;display:flex;align-items:center;justify-content:center;position:relative}.mobile-menu-btn{display:none;align-items:center;gap:8px;padding:10px 16px;font-size:1rem;font-weight:600;color:var(--primary)}.nav-list{display:flex;align-items:center;justify-content:center;gap:6px;position:relative}.nav-item{position:relative}.nav-link{display:inline-flex;align-items:center;gap:6px;padding:14px 16px;font-size:.96rem;font-weight:600;color:var(--text-main);border-radius:6px;transition:all var(--transition-fast)}.nav-link:hover{color:var(--accent);background-color:#f8fafc}.dropdown-toggle{background:transparent;border:none;cursor:pointer;font-family:inherit}.dropdown-arrow{color:var(--text-light);transition:transform var(--transition-fast)}.dropdown-open .dropdown-arrow{transform:rotate(180deg)}.nav-item.active-section .nav-link{color:var(--primary);font-weight:700;position:relative}.nav-item.active-section:after{content:"";position:absolute;bottom:0;left:14px;right:14px;height:3px;background-color:var(--accent);border-radius:3px 3px 0 0}.dropdown-menu{position:absolute;top:100%;left:0;width:max-content;min-width:200px;max-width:420px;background-color:#fff;border-radius:8px;box-shadow:0 10px 25px #0f172a1f,0 3px 6px #0f172a0d;border:1px solid #e2e8f0;padding:4px;opacity:0;visibility:hidden;transform:translateY(6px);transition:all var(--transition-fast);z-index:150}.dropdown-open .dropdown-menu{opacity:1;visibility:visible;transform:translateY(0)}.dropdown-list{display:flex;flex-direction:column;gap:1px}.dropdown-item{position:relative}.dropdown-link{display:block;padding:6px 14px;border-radius:5px;font-size:.91rem;line-height:1.35;color:var(--text-main);white-space:nowrap;transition:background-color var(--transition-fast),color var(--transition-fast)}.dropdown-link:hover{background-color:#f1f5f9;color:var(--primary)}.dropdown-text{display:block}.current-section-item .dropdown-link{background-color:#e0f2fe;color:var(--primary)}.nav-search-item{margin-left:10px}.nav-search-btn{display:inline-flex;align-items:center;gap:8px;padding:8px 16px;background-color:#f0f7ff;border:1px solid #bae6fd;border-radius:20px;font-size:.92rem;font-weight:600;color:var(--primary);transition:all var(--transition-normal)}.nav-search-btn:hover{background-color:#e0f2fe;border-color:#7dd3fc;color:var(--accent-hover);transform:translateY(-1px)}.search-icon{color:var(--accent)}@media (max-width: 1024px){.header-container{flex-direction:column;align-items:flex-start;gap:14px}.header-actions{width:100%;justify-content:space-between}.mobile-menu-btn{display:inline-flex;margin:8px 0}.nav-container{justify-content:flex-start}.nav-list{display:none;flex-direction:column;align-items:stretch;width:100%;padding:10px 0 20px;border-top:1px solid #e2e8f0}.nav-list.open{display:flex}.dropdown-menu{position:static;box-shadow:none;border:none;background-color:#f8fafc;margin:2px 0 6px 12px;width:100%;max-width:100%;opacity:1;visibility:visible;transform:none;display:none}.dropdown-link{white-space:normal}.dropdown-open .dropdown-menu{display:block}.nav-item.active-section:after{display:none}.nav-item.active-section .nav-link{background-color:#f0f7ff}}@media (max-width: 640px){.author-name{font-size:1.35rem}.author-degree{font-size:.85rem}.header-actions{flex-direction:column;align-items:stretch;gap:10px}.header-email,.lang-switcher,.btn-company{justify-content:center;width:100%}}.hero-banner{position:relative;background:url(/images/fon_mono.webp) center center / cover no-repeat;color:#fff;padding:38px 0 42px;overflow:hidden;border-bottom:3px solid #0284c7}.hero-overlay{position:absolute;top:0;right:0;bottom:0;left:0;background:linear-gradient(90deg,#071221e0,#0b1b31c7 60%,#0f2544a6);pointer-events:none}.hero-container{max-width:1320px;margin:0 auto;padding:0 24px;position:relative;z-index:2}.hero-content{display:flex;flex-direction:column;max-width:840px}.hero-title{font-family:var(--font-serif);font-size:2.75rem;font-weight:700;line-height:1.18;color:#fff;margin-bottom:14px;letter-spacing:-.02em;text-shadow:0 2px 10px rgba(0,0,0,.4)}.hero-subtitle{font-size:1.12rem;line-height:1.55;color:#e2e8f0;margin-bottom:22px;max-width:720px;text-shadow:0 1px 4px rgba(0,0,0,.3)}.hero-actions{display:flex;align-items:center;gap:16px;margin-bottom:0;flex-wrap:wrap}.hero-btn{display:inline-flex;align-items:center;gap:10px;padding:12px 24px;border-radius:8px;font-size:.95rem;font-weight:600;transition:all var(--transition-normal)}.hero-btn.primary{background:linear-gradient(135deg,#0284c7,#0369a1);color:#fff;box-shadow:0 4px 14px #0284c766;border:1px solid rgba(255,255,255,.2)}.hero-btn.primary:hover{background:linear-gradient(135deg,#0369a1,#075985);transform:translateY(-2px);box-shadow:0 6px 20px #0284c78c}.hero-btn.secondary{background:#0f172a99;-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);color:#fff;border:1px solid rgba(255,255,255,.3)}.hero-btn.secondary:hover{background:#0f172ad9;border-color:#ffffff80;transform:translateY(-2px)}@media (max-width: 992px){.hero-banner{padding:32px 0 36px}.hero-title{font-size:2.2rem}}@media (max-width: 640px){.hero-banner{padding:26px 0 30px}.hero-title{font-size:1.8rem;margin-bottom:10px}.hero-subtitle{font-size:.98rem;margin-bottom:18px}.hero-actions{flex-direction:column;align-items:stretch}.hero-btn{justify-content:center}}.catalog-section{padding:60px 0 80px;background-color:var(--bg-page)}.catalog-container{max-width:1320px;margin:0 auto;padding:0 24px}.section-heading-block{text-align:center;margin-bottom:40px}.section-pill{display:inline-flex;align-items:center;gap:7px;padding:6px 14px;background-color:#e0f2fe;color:var(--primary);border-radius:20px;font-size:.85rem;font-weight:700;margin-bottom:12px;text-transform:uppercase;letter-spacing:.04em}.section-title{font-family:var(--font-serif);font-size:2.35rem;font-weight:700;color:var(--primary-dark);line-height:1.25;margin-bottom:10px}.section-subtitle{font-size:1.05rem;color:var(--text-muted);max-width:680px;margin:0 auto}.search-filter-wrapper{margin-bottom:40px}.search-bar-card{background-color:#fff;border-radius:14px;border:1px solid var(--border);box-shadow:var(--shadow-sm);padding:24px;display:flex;flex-direction:column;gap:20px}.search-input-group{position:relative;display:flex;align-items:center}.search-input-icon{position:absolute;left:16px;color:var(--text-light);pointer-events:none}.search-input-field{width:100%;padding:14px 44px 14px 48px;border:2px solid var(--border);border-radius:10px;font-size:1rem;color:var(--text-main);background-color:#fff;outline:none;transition:all var(--transition-fast)}.search-input-field:focus{border-color:var(--accent);box-shadow:0 0 0 4px #0284c71f}.search-clear-btn{position:absolute;right:14px;padding:4px;color:var(--text-light);border-radius:50%;display:flex;align-items:center;justify-content:center}.search-clear-btn:hover{color:var(--text-main);background-color:#f1f5f9}.filters-toolbar{display:flex;align-items:center;flex-wrap:wrap;gap:16px;padding-top:6px}.filter-group{display:flex;align-items:center;gap:10px}.filter-group-label{font-size:.88rem;font-weight:600;color:var(--text-muted);display:inline-flex;align-items:center;gap:5px;white-space:nowrap}.filter-pill-list{display:flex;align-items:center;gap:6px;flex-wrap:wrap}.filter-pill{padding:7px 13px;border-radius:20px;font-size:.86rem;font-weight:600;background-color:#f1f5f9;color:var(--text-muted);border:1px solid #e2e8f0;transition:all var(--transition-fast)}.filter-pill:hover{background-color:#e2e8f0;color:var(--text-main)}.filter-pill.active{background-color:var(--primary);color:#fff;border-color:var(--primary);box-shadow:0 2px 6px #1e3a5f40}.filter-select{padding:8px 14px;border-radius:8px;border:1px solid var(--border);background-color:#fff;color:var(--text-main);font-size:.88rem;font-weight:500;outline:none;cursor:pointer;transition:border-color var(--transition-fast)}.filter-select:focus{border-color:var(--accent)}.reset-filters-btn{display:inline-flex;align-items:center;gap:6px;padding:8px 14px;background-color:#fee2e2;color:#b91c1c;border-radius:8px;font-size:.86rem;font-weight:600;margin-left:auto}.reset-filters-btn:hover{background-color:#fecaca;color:#991b1b}.results-counter-bar{display:flex;align-items:center;justify-content:space-between;padding-top:14px;border-top:1px solid #f1f5f9;font-size:.88rem;color:var(--text-light)}.results-count-text strong{color:var(--primary);font-weight:700}.results-filtered-badge{font-size:.78rem;font-weight:600;background-color:#f0fdf4;color:#166534;padding:3px 8px;border-radius:4px;border:1px solid #bbf7d0}.books-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:24px}.book-card{background-color:#fff;border-radius:12px;border:1px solid var(--border);box-shadow:var(--shadow-sm);overflow:hidden;display:flex;flex-direction:column;transition:transform var(--transition-normal),box-shadow var(--transition-normal),border-color var(--transition-normal)}.book-card:hover{transform:translateY(-5px);box-shadow:0 14px 28px #0f172a1a;border-color:#93c5fd}.book-cover-wrapper{position:relative;width:100%;height:304px;background:linear-gradient(180deg,#f8fafc,#eef2f6);display:flex;align-items:center;justify-content:center;overflow:hidden;cursor:pointer;border-bottom:1px solid #f1f5f9}.book-cover-img{width:100%;height:100%;object-fit:contain;padding:10px;transition:transform var(--transition-normal)}.book-card:hover .book-cover-img{transform:scale(1.02)}.book-cover-placeholder{display:flex;flex-direction:column;align-items:center;justify-content:center;gap:12px;padding:24px;text-align:center;color:var(--primary)}.book-cover-placeholder.hidden{display:none}.placeholder-icon{color:var(--accent)}.placeholder-title{font-family:var(--font-serif);font-weight:700;font-size:1.1rem}.book-badges{position:absolute;top:12px;right:12px;display:flex;justify-content:flex-end;pointer-events:none}.badge{font-size:.78rem;font-weight:700;padding:4px 10px;border-radius:6px;letter-spacing:.02em;box-shadow:0 2px 6px #0003}.badge-bilingual{background-color:var(--primary);color:#fff}.badge-ru{background-color:#0284c7;color:#fff}.badge-en{background-color:#475569;color:#fff}.cover-hover-overlay{position:absolute;top:0;right:0;bottom:0;left:0;background:#0f172a73;-webkit-backdrop-filter:blur(2px);backdrop-filter:blur(2px);display:flex;flex-direction:column;align-items:center;justify-content:center;gap:8px;color:#fff;opacity:0;transition:opacity var(--transition-fast);pointer-events:none}.book-cover-wrapper:hover .cover-hover-overlay{opacity:1}.hover-icon{color:#38bdf8}.hover-text{font-size:.95rem;font-weight:700;background:#0006;padding:6px 14px;border-radius:20px;border:1px solid rgba(255,255,255,.3)}.book-body{padding:16px 18px;display:flex;flex-direction:column;flex:1}.book-meta-top{display:flex;justify-content:space-between;align-items:center;margin-bottom:6px}.book-author{font-size:.85rem;font-weight:700;color:var(--accent)}.book-year{display:inline-flex;align-items:center;gap:4px;font-size:.82rem;color:var(--text-light);font-weight:500}.meta-icon{color:var(--text-light)}.book-title{font-family:var(--font-serif);font-size:1.15rem;font-weight:700;line-height:1.32;color:var(--primary-dark);margin-bottom:5px;min-height:2.6em;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}.book-subtitle{font-size:.82rem;color:var(--text-muted);font-style:italic;margin-bottom:10px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.book-description{font-size:.84rem;line-height:1.45;color:var(--text-muted);margin-bottom:14px;display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden;flex-grow:1}.book-specs{display:flex;align-items:center;gap:14px;padding:10px 12px;background-color:#f8fafc;border-radius:8px;border:1px solid #f1f5f9;font-size:.82rem;color:var(--text-muted);margin-bottom:16px}.spec-item{display:inline-flex;align-items:center;gap:5px}.spec-icon{color:var(--accent)}.spec-label{font-weight:600;color:var(--text-light)}.spec-value{font-weight:600;color:var(--primary)}.book-lang-selector{margin-bottom:12px;padding:7px 10px;background-color:#f0f7ff;border:1px solid #bae6fd;border-radius:6px}.lang-selector-label{display:block;font-size:.72rem;font-weight:600;text-transform:uppercase;color:var(--primary);margin-bottom:5px;letter-spacing:.02em}.lang-pills{display:flex;gap:6px}.lang-pill{flex:1;display:inline-flex;align-items:center;justify-content:center;gap:5px;padding:4px 8px;border-radius:5px;font-size:.78rem;font-weight:600;background-color:#fff;color:var(--text-muted);border:1px solid #cbd5e1;transition:all var(--transition-fast)}.lang-pill:hover{border-color:var(--accent);color:var(--primary)}.lang-pill.active{background-color:var(--primary);color:#fff;border-color:var(--primary);box-shadow:0 1px 3px #1e3a5f33}.pill-check{color:#38bdf8}.book-single-lang-info{display:flex;align-items:center;gap:6px;font-size:.78rem;margin-bottom:12px;color:var(--text-muted)}.single-lang-label{font-weight:600}.single-lang-val{font-weight:700;color:var(--primary)}.book-actions{display:grid;grid-template-columns:1fr 1fr;gap:8px;margin-top:auto}.btn-book{display:inline-flex;align-items:center;justify-content:center;gap:6px;padding:7px 10px;border-radius:6px;font-size:.82rem;font-weight:600;white-space:nowrap;transition:all var(--transition-normal)}.btn-open-pdf{background-color:var(--primary);color:#fff;box-shadow:0 1px 4px #1e3a5f2e}.btn-open-pdf:hover{background-color:var(--primary-light);transform:translateY(-1px);box-shadow:0 3px 8px #1e3a5f40}.btn-lang-tag{font-size:.72rem;opacity:.85}.download-group{position:relative;display:flex;min-width:0}.btn-download{flex:1;background-color:#f1f5f9;color:var(--text-main);border:1px solid #cbd5e1;padding:7px 8px;overflow:hidden;text-overflow:ellipsis}.btn-download:hover{background-color:#e2e8f0;color:var(--primary);border-color:#94a3b8}.btn-download-caret{display:inline-flex;align-items:center;justify-content:center;padding:0 7px;background-color:#e2e8f0;border:1px solid #cbd5e1;border-left:none;border-radius:0 6px 6px 0;color:var(--text-muted)}.btn-download-caret:hover{background-color:#cbd5e1;color:var(--text-main)}.download-group .btn-download{border-top-right-radius:0;border-bottom-right-radius:0}.download-dropdown-menu{position:absolute;bottom:100%;right:0;margin-bottom:6px;min-width:210px;background-color:#fff;border-radius:8px;border:1px solid var(--border);box-shadow:var(--shadow-lg);padding:6px;display:flex;flex-direction:column;gap:3px;z-index:50}.download-menu-item{display:flex;align-items:center;justify-content:space-between;padding:8px 12px;border-radius:6px;font-size:.84rem;font-weight:600;color:var(--text-main);text-align:left}.download-menu-item:hover{background-color:#f0f7ff;color:var(--primary)}.download-menu-item.highlight{background-color:#e0f2fe;color:var(--primary)}.download-menu-item.highlight:hover{background-color:#bae6fd}.menu-size{font-size:.74rem;color:var(--text-light);font-weight:400}.menu-divider{height:1px;background-color:#e2e8f0;margin:3px 0}.empty-results-box{background-color:#fff;border-radius:14px;border:2px dashed var(--border);padding:60px 24px;text-align:center;display:flex;flex-direction:column;align-items:center;gap:14px}.empty-icon{color:var(--accent)}.empty-title{font-family:var(--font-serif);font-size:1.5rem;font-weight:700;color:var(--primary-dark)}.empty-desc{font-size:.96rem;color:var(--text-muted);max-width:500px}.empty-reset-btn{display:inline-flex;align-items:center;gap:8px;padding:10px 20px;background-color:var(--primary);color:#fff;border-radius:8px;font-size:.92rem;font-weight:600;margin-top:8px}.empty-reset-btn:hover{background-color:var(--primary-light)}@media (max-width: 768px){.books-grid{grid-template-columns:1fr}.filters-toolbar{flex-direction:column;align-items:stretch}.filter-group{flex-direction:column;align-items:flex-start}.reset-filters-btn{margin-left:0}.book-cover-wrapper{height:256px}}.in-book-results-section{margin-top:24px}.in-book-results-header{display:flex;align-items:center;justify-content:space-between;margin-bottom:20px;gap:16px;flex-wrap:wrap;padding:16px 20px;background-color:#f8fafc;border-radius:10px;border:1px solid #e2e8f0}.results-main-heading{font-family:var(--font-serif);font-size:1.35rem;font-weight:700;color:var(--primary);margin-bottom:4px}.results-subheading{font-size:.92rem;color:var(--text-muted)}.switch-view-btn{display:inline-flex;align-items:center;gap:8px;padding:8px 16px;background-color:#fff;color:var(--primary);border:1px solid #cbd5e1;border-radius:6px;font-size:.88rem;font-weight:600;cursor:pointer;transition:all var(--transition-fast)}.switch-view-btn:hover{background-color:var(--primary);color:#fff;border-color:var(--primary)}.in-book-loading{display:flex;flex-direction:column;align-items:center;justify-content:center;padding:60px 20px;color:var(--text-muted);gap:16px}.search-spinner{width:36px;height:36px;border:3px solid #e2e8f0;border-top-color:var(--accent);border-radius:50%;animation:spin .8s linear infinite}@keyframes 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