*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}:root{--primary-50: #eff6ff;--primary-100: #dbeafe;--primary-200: #bfdbfe;--primary-300: #93c5fd;--primary-400: #60a5fa;--primary-500: #3b82f6;--primary-600: #2563eb;--primary-700: #1d4ed8;--surface-50: #fafbff;--surface-100: #f1f5f9;--surface-200: #e2e8f0;--surface-300: #cbd5e1;--surface-400: #94a3b8;--surface-500: #64748b;--surface-600: #475569;--surface-700: #334155;--surface-800: #1e293b;--surface-900: #0f172a;--accent-warm: #f59e0b;--accent-success: #10b981;--accent-danger: #ef4444;--gradient-primary: linear-gradient(135deg, #667eea 0%, #764ba2 100%);--gradient-warm: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);--gradient-ocean: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);--gradient-sunset: linear-gradient(135deg, #fa709a 0%, #fee140 100%);--shadow-sm: 0 1px 2px rgba(0, 0, 0, .05);--shadow-md: 0 4px 6px -1px rgba(0, 0, 0, .1), 0 2px 4px -2px rgba(0, 0, 0, .1);--shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, .1), 0 4px 6px -4px rgba(0, 0, 0, .1);--shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, .1), 0 8px 10px -6px rgba(0, 0, 0, .1);--shadow-glow: 0 0 20px rgba(59, 130, 246, .3);--radius-sm: 6px;--radius-md: 10px;--radius-lg: 16px;--radius-xl: 24px;--radius-full: 9999px;--font-sans: "Inter", "Noto Sans Arabic", system-ui, -apple-system, sans-serif;--font-serif: "Georgia", "Noto Sans Arabic", serif;--transition-fast: .15s cubic-bezier(.4, 0, .2, 1);--transition-normal: .25s cubic-bezier(.4, 0, .2, 1);--transition-slow: .35s cubic-bezier(.4, 0, .2, 1);font-synthesis:none;text-rendering:optimizeLegibility;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}html{scroll-behavior:smooth}body{font-family:var(--font-sans);background-color:var(--surface-50);color:var(--surface-800);line-height:1.6;min-height:100vh;overflow-x:hidden}#root{min-height:100vh}a{color:var(--primary-500);text-decoration:none;transition:color var(--transition-fast)}a:hover{color:var(--primary-700)}button{font-family:var(--font-sans);border:none;cursor:pointer;transition:all var(--transition-normal)}button:focus-visible{outline:2px solid var(--primary-500);outline-offset:2px}select{font-family:var(--font-sans)}.glass{background:#ffffffb3;backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);border:1px solid rgba(255,255,255,.3)}[dir=rtl]{text-align:right}[dir=rtl] .reader-nav{flex-direction:row-reverse}[dir=rtl] .back-btn{margin-right:0;margin-left:1rem}::-webkit-scrollbar{width:8px}::-webkit-scrollbar-track{background:var(--surface-100)}::-webkit-scrollbar-thumb{background:var(--surface-300);border-radius:var(--radius-full)}::-webkit-scrollbar-thumb:hover{background:var(--surface-400)}.loading{display:flex;align-items:center;justify-content:center;min-height:100vh;font-size:1.2rem;color:var(--surface-500);font-weight:500;letter-spacing:.5px}.loading:after{content:"";width:20px;height:20px;border:3px solid var(--surface-200);border-top-color:var(--primary-500);border-radius:50%;margin-left:12px;animation:spin .8s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}.app-container{max-width:1200px;margin:0 auto;min-height:100vh;display:flex;flex-direction:column}header{position:sticky;top:0;z-index:100;background:#ffffffd9;backdrop-filter:blur(16px);-webkit-backdrop-filter:blur(16px);border-bottom:1px solid rgba(226,232,240,.6);padding:0}header>div{display:flex;justify-content:space-between;align-items:center;padding:1rem 1.5rem;max-width:1200px;margin:0 auto;width:100%}header h1{font-size:1.5rem;font-weight:800;margin:0;background:var(--gradient-primary);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;letter-spacing:-.5px}.settings-trigger{display:flex;align-items:center;justify-content:center;width:42px;height:42px;border-radius:var(--radius-md);background:var(--surface-100);border:1px solid var(--surface-200);font-size:1.2rem;transition:all var(--transition-normal);cursor:pointer}.settings-trigger:hover{background:var(--primary-50);border-color:var(--primary-200);transform:rotate(45deg);box-shadow:var(--shadow-md)}main{flex:1;padding:2rem 1.5rem}@media (max-width: 768px){header h1{font-size:1.25rem}main{padding:1.5rem 1rem}}@media (max-width: 480px){header>div{padding:.75rem 1rem}header h1{font-size:1.1rem}main{padding:1rem .75rem}}.bookshelf{display:flex;flex-direction:column;gap:2.5rem}.empty-state{display:flex;flex-direction:column;align-items:center;justify-content:center;min-height:40vh;color:var(--surface-400);text-align:center}.empty-state p{font-size:1.1rem;color:var(--surface-400)}.level-shelf{padding-bottom:1.5rem;border-bottom:3px solid var(--surface-200);position:relative}.level-shelf:after{content:"";position:absolute;bottom:-3px;left:0;width:60px;height:3px;background:var(--gradient-primary);border-radius:2px}.shelf-label{font-family:var(--font-sans);color:var(--surface-400);font-size:.8rem;text-transform:uppercase;letter-spacing:1.5px;font-weight:700;margin-bottom:1.25rem;display:flex;align-items:center;gap:.5rem}.shelf-label:before{content:"";display:inline-block;width:8px;height:8px;border-radius:50%;background:var(--primary-400)}.book-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(140px,1fr));gap:1.5rem}.book-item{cursor:pointer;transition:all var(--transition-normal);border-radius:var(--radius-md)}.book-item:hover{transform:translateY(-6px)}.book-item:focus-visible{outline:2px solid var(--primary-500);outline-offset:4px;border-radius:var(--radius-md)}.book-cover{width:100%;aspect-ratio:2/3;border-radius:4px 10px 10px 4px;box-shadow:-2px 0 4px #00000014,4px 4px 12px #00000026;overflow:hidden;position:relative;transition:box-shadow var(--transition-normal)}.book-item:hover .book-cover{box-shadow:-2px 0 4px #0000001a,8px 8px 25px #0003}.book-cover:before{content:"";position:absolute;left:0;top:0;bottom:0;width:8px;background:linear-gradient(to right,rgba(0,0,0,.15),transparent);z-index:2}.book-cover img{width:100%;height:100%;object-fit:cover}.cover-placeholder{display:flex;align-items:center;justify-content:center;height:100%;padding:1rem;text-align:center;font-weight:700;font-size:.85rem;color:var(--surface-800);line-height:1.3}.book-spine h3{font-size:.85rem;margin-top:.75rem;text-align:center;color:var(--surface-700);line-height:1.3;font-weight:600}@media (max-width: 768px){.book-grid{grid-template-columns:repeat(auto-fill,minmax(120px,1fr));gap:1rem}}@media (max-width: 480px){.book-grid{grid-template-columns:repeat(auto-fill,minmax(100px,1fr));gap:.75rem}.book-spine h3{font-size:.75rem}}.book-reader{max-width:800px;margin:0 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slideDown{0%{opacity:0;transform:translateY(-8px)}to{opacity:1;transform:translateY(0)}}.translation{font-style:italic;color:var(--surface-500);margin:0 0 .75rem;font-size:1.1rem;line-height:1.8}.grammar-card{background:var(--gradient-primary);color:#fff;padding:1rem 1.25rem;border-radius:var(--radius-md);font-size:.95rem;box-shadow:0 4px 12px #667eea4d}.grammar-header{display:flex;align-items:center;gap:.5rem;margin-bottom:.5rem}.grammar-header strong{font-size:1.1rem}.pos-tag{background:#fff3;padding:2px 10px;border-radius:var(--radius-full);font-size:.75rem;text-transform:uppercase;letter-spacing:.5px;font-weight:500}.grammar-explanation{margin:0;opacity:.9;line-height:1.5}.empty-page{display:flex;flex-direction:column;align-items:center;justify-content:center;min-height:30vh;color:var(--surface-400)}.empty-icon{font-size:3rem;margin-bottom:.5rem;opacity:.5}.empty-page p{color:var(--surface-400);font-size:1rem}.pagination-controls{display:flex;justify-content:center;align-items:center;margin-top:1.5rem;gap:1rem}.page-btn{background:#fff;border:1.5px solid var(--surface-200);padding:.5rem 1.25rem;border-radius:var(--radius-full);cursor:pointer;color:var(--surface-600);font-weight:500;font-size:.9rem;transition:all var(--transition-normal)}.page-btn:disabled{opacity:.4;cursor:not-allowed}.page-btn:not(:disabled):hover{background:var(--primary-50);border-color:var(--primary-300);color:var(--primary-600);box-shadow:var(--shadow-sm)}.page-indicator{display:flex;align-items:center;gap:.25rem;font-variant-numeric:tabular-nums;color:var(--surface-500);font-weight:500}.page-current{font-weight:700;color:var(--primary-600);font-size:1.1rem}.page-sep{color:var(--surface-300)}.page-total{color:var(--surface-400)}.segment:focus-visible{outline:2px solid var(--primary-500);outline-offset:2px}.audio-btn:focus-visible{outline:2px solid var(--primary-500);outline-offset:2px;opacity:1}@media (max-width: 768px){.page{padding:1.5rem 1.25rem}.original-text{font-size:1.1rem;line-height:1.9}.reader-nav{flex-wrap:wrap}}@media (max-width: 480px){.page{padding:1.25rem 1rem;border-radius:var(--radius-md)}.original-text{font-size:1rem}.translation{font-size:.95rem}.back-btn span:last-child{display:none}.pagination-controls{gap:.5rem}.page-btn{padding:.4rem .75rem;font-size:.8rem}}.onboarding-container{display:flex;justify-content:center;align-items:center;min-height:100vh;padding:1.5rem;background:linear-gradient(135deg,#0f0c29,#302b63,#24243e);position:relative;overflow:hidden}.onboarding-bg-circle{position:absolute;border-radius:50%;opacity:.08;pointer-events:none}.onboarding-bg-circle-1{width:400px;height:400px;background:var(--gradient-ocean);top:-100px;right:-100px;animation:float 8s ease-in-out infinite}.onboarding-bg-circle-2{width:300px;height:300px;background:var(--gradient-warm);bottom:-80px;left:-80px;animation:float 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h1{font-size:2rem;font-weight:800;color:var(--surface-900);margin-bottom:.5rem;letter-spacing:-.5px}.onboarding-subtitle{color:var(--surface-500);margin-bottom:1.5rem;font-size:1rem;line-height:1.5}.onboarding-step-indicator{display:flex;align-items:center;justify-content:center;gap:0;margin-bottom:2rem}.step-dot{width:12px;height:12px;border-radius:50%;background:var(--surface-200);transition:all var(--transition-normal)}.step-dot.active{background:var(--primary-500);box-shadow:0 0 0 4px #3b82f633}.step-line{width:40px;height:2px;background:var(--surface-200)}.language-options{display:flex;flex-direction:column;gap:.75rem;margin-bottom:2rem}.language-option{display:flex;flex-direction:column;align-items:center;gap:.25rem;padding:1rem 1.5rem;border-radius:var(--radius-lg);border:2px solid var(--surface-200);background:#fff;cursor:pointer;transition:all var(--transition-normal);font-size:1rem}.language-option:hover{border-color:var(--primary-300);background:var(--primary-50);transform:translateY(-2px);box-shadow:var(--shadow-md)}.language-option.selected{border-color:var(--primary-500);background:var(--primary-50);box-shadow:0 0 0 4px #3b82f626}.lang-native-name{font-size:1.15rem;font-weight:600;color:var(--surface-800)}.lang-english-name{font-size:.8rem;color:var(--surface-400);font-weight:400}.onboarding-actions{display:flex;gap:.75rem}.primary-button{flex:1;padding:.9rem 1.5rem;background:var(--gradient-primary);color:#fff;border:none;border-radius:var(--radius-lg);font-size:1.05rem;font-weight:600;cursor:pointer;transition:all var(--transition-normal);letter-spacing:.3px}.primary-button:hover{transform:translateY(-2px);box-shadow:0 8px 25px -5px #667eea80}.primary-button:active{transform:translateY(0)}.secondary-button{padding:.9rem 1.5rem;background:var(--surface-100);color:var(--surface-600);border:1px solid var(--surface-200);border-radius:var(--radius-lg);font-size:1.05rem;font-weight:500;cursor:pointer;transition:all var(--transition-normal)}.secondary-button:hover{background:var(--surface-200)}@media (max-width: 480px){.onboarding-card{padding:2rem 1.5rem}.onboarding-card h1{font-size:1.6rem}.onboarding-icon{font-size:2.5rem}}.settings-overlay{position:fixed;top:0;left:0;right:0;bottom:0;background-color:#0f172a99;display:flex;justify-content:center;align-items:center;z-index:1000;backdrop-filter:blur(8px);-webkit-backdrop-filter:blur(8px);padding:1rem;animation:overlayFadeIn .2s ease}@keyframes overlayFadeIn{0%{opacity:0}to{opacity:1}}.settings-modal{background:#fff;padding:2rem;border-radius:var(--radius-xl);width:100%;max-width:440px;box-shadow:0 25px 50px -12px #00000040;animation:modalSlideUp .3s cubic-bezier(.16,1,.3,1);max-height:90vh;overflow-y:auto}@keyframes modalSlideUp{0%{opacity:0;transform:translateY(20px) scale(.95)}to{opacity:1;transform:translateY(0) scale(1)}}.settings-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:1.5rem;padding-bottom:1rem;border-bottom:1px solid var(--surface-200)}.settings-header h2{margin:0;font-size:1.3rem;font-weight:700;color:var(--surface-900)}.close-btn{display:flex;align-items:center;justify-content:center;width:36px;height:36px;background:var(--surface-100);border:none;border-radius:var(--radius-md);font-size:1.4rem;line-height:1;color:var(--surface-400);cursor:pointer;transition:all var(--transition-fast)}.close-btn:hover{background:var(--surface-200);color:var(--surface-700)}.form-group{margin-bottom:1.5rem}.form-group label{display:block;margin-bottom:.75rem;color:var(--surface-600);font-weight:600;font-size:.9rem;text-transform:uppercase;letter-spacing:.5px}.language-cards{display:flex;gap:.5rem;flex-wrap:wrap}.lang-card{flex:1;min-width:100px;display:flex;flex-direction:column;align-items:center;gap:.15rem;padding:.75rem .5rem;border-radius:var(--radius-md);border:2px solid var(--surface-200);background:#fff;cursor:pointer;transition:all var(--transition-normal)}.lang-card:hover{border-color:var(--primary-300);background:var(--primary-50)}.lang-card.selected{border-color:var(--primary-500);background:var(--primary-50);box-shadow:0 0 0 3px #3b82f626}.lang-card-name{font-size:.95rem;font-weight:600;color:var(--surface-800)}.lang-card-sub{font-size:.7rem;color:var(--surface-400)}.save-btn{width:100%;padding:.9rem;background:var(--gradient-primary);color:#fff;border:none;border-radius:var(--radius-lg);font-size:1rem;font-weight:600;cursor:pointer;margin-top:.5rem;transition:all var(--transition-normal)}.save-btn:hover{transform:translateY(-2px);box-shadow:0 8px 25px -5px #667eea80}.save-btn:active{transform:translateY(0)}@media (max-width: 480px){.settings-modal{padding:1.5rem}.lang-card{min-width:80px;padding:.6rem .35rem}}