: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;--primary-800: #1e40af;--primary-900: #1e3a8a;--accent-400: #a78bfa;--accent-500: #8b5cf6;--accent-600: #7c3aed;--success-500: #22c55e;--warning-500: #f59e0b;--error-500: #ef4444;--gray-50: #f8fafc;--gray-100: #f1f5f9;--gray-200: #e2e8f0;--gray-300: #cbd5e1;--gray-400: #94a3b8;--gray-500: #64748b;--gray-600: #475569;--gray-700: #334155;--gray-800: #1e293b;--gray-900: #0f172a;--gray-950: #020617;--bg-primary: #ffffff;--bg-secondary: #f8fafc;--bg-tertiary: #f1f5f9;--bg-card: #ffffff;--bg-card-hover: #f8fafc;--bg-glass: rgba(255, 255, 255, .7);--bg-glass-strong: rgba(255, 255, 255, .85);--bg-overlay: rgba(0, 0, 0, .5);--text-primary: #0f172a;--text-secondary: #475569;--text-tertiary: #94a3b8;--text-inverse: #ffffff;--text-link: #3b82f6;--border-color: #e2e8f0;--border-color-hover: #cbd5e1;--shadow-sm: 0 1px 2px rgba(0, 0, 0, .05);--shadow-md: 0 4px 6px -1px rgba(0, 0, 0, .07), 0 2px 4px -2px rgba(0, 0, 0, .05);--shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, .08), 0 4px 6px -4px rgba(0, 0, 0, .05);--shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, .1), 0 8px 10px -6px rgba(0, 0, 0, .05);--shadow-glow: 0 0 20px rgba(59, 130, 246, .3);--font-sans: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;--font-mono: "JetBrains Mono", "Fira Code", monospace;--radius-sm: 8px;--radius-md: 12px;--radius-lg: 16px;--radius-xl: 24px;--radius-full: 9999px;--transition-fast: .15s cubic-bezier(.4, 0, .2, 1);--transition-normal: .25s cubic-bezier(.4, 0, .2, 1);--transition-slow: .4s cubic-bezier(.4, 0, .2, 1);--transition-spring: .5s cubic-bezier(.34, 1.56, .64, 1);--container-max: 1280px;--navbar-height: 72px}[data-theme=dark]{--bg-primary: #0f172a;--bg-secondary: #1e293b;--bg-tertiary: #334155;--bg-card: #1e293b;--bg-card-hover: #334155;--bg-glass: rgba(15, 23, 42, .7);--bg-glass-strong: rgba(15, 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0}.text-center{text-align:center}.text-gradient{background:linear-gradient(135deg,var(--primary-500),var(--accent-500));-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}.initial-loader{display:flex;flex-direction:column;align-items:center;justify-content:center;min-height:100vh;gap:20px;color:var(--text-secondary)}.loader-spinner{width:48px;height:48px;border:3px solid var(--border-color);border-top-color:var(--primary-500);border-radius:50%;animation:spin .8s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}@keyframes fadeIn{0%{opacity:0}to{opacity:1}}@keyframes fadeInUp{0%{opacity:0;transform:translateY(30px)}to{opacity:1;transform:translateY(0)}}@keyframes fadeInDown{0%{opacity:0;transform:translateY(-20px)}to{opacity:1;transform:translateY(0)}}@keyframes slideInLeft{0%{opacity:0;transform:translate(-30px)}to{opacity:1;transform:translate(0)}}@keyframes 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forwards}.stagger-1{animation-delay:.1s;opacity:0}.stagger-2{animation-delay:.2s;opacity:0}.stagger-3{animation-delay:.3s;opacity:0}.stagger-4{animation-delay:.4s;opacity:0}.stagger-5{animation-delay:.5s;opacity:0}.stagger-6{animation-delay:.6s;opacity:0}.page-transition{animation:fadeInUp .4s ease forwards}.skeleton{background:linear-gradient(90deg,var(--bg-tertiary) 25%,var(--bg-secondary) 50%,var(--bg-tertiary) 75%);background-size:400% 100%;animation:shimmer 1.5s ease-in-out infinite;border-radius:var(--radius-sm)}@media(max-width:768px){.container{padding:0 16px}.section{padding:48px 0}}@media(max-width:480px){.container{padding:0 12px}.section{padding:32px 0}}::-webkit-scrollbar{width:8px}::-webkit-scrollbar-track{background:var(--bg-secondary)}::-webkit-scrollbar-thumb{background:var(--gray-400);border-radius:4px}::-webkit-scrollbar-thumb:hover{background:var(--gray-500)}::selection{background:var(--primary-500);color:#fff}:root{--navbar-height: 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a:hover{background:#3b82f61a}.navbar-links a.active{color:var(--primary-600);background:var(--primary-50);font-weight:600}[data-theme=dark] .navbar-links a.active{color:var(--primary-400);background:#3b82f626}.navbar-actions{display:flex;align-items:center;gap:8px}.theme-switch-wrap{display:flex;align-items:center;gap:6px;cursor:pointer;padding:4px 6px;border-radius:var(--radius-full);transition:background var(--transition-fast);-webkit-user-select:none;user-select:none}.theme-switch-wrap:hover{background:var(--bg-tertiary)}.theme-switch-icon{font-size:16px!important;transition:all .3s ease}.sun-icon{color:#f59e0b;opacity:1}.moon-icon,.theme-switch-wrap.dark-active .sun-icon{color:var(--text-tertiary);opacity:.4}.theme-switch-wrap.dark-active .moon-icon{color:#818cf8;opacity:1}.theme-switch-track{width:40px;height:22px;border-radius:12px;background:linear-gradient(135deg,#93c5fd,#60a5fa);position:relative;transition:background .4s ease;box-shadow:inset 0 1px 3px 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transparent}.profile-avatar-btn:hover{background:var(--bg-tertiary);border-color:var(--border-color)}.profile-name-text{font-size:.82rem;font-weight:600;color:var(--text-primary)}.profile-chevron{color:var(--text-tertiary);transition:transform .2s ease}.profile-dropdown-wrap{position:relative}.profile-dropdown{position:absolute;top:calc(100% + 8px);right:0;width:260px;background:var(--bg-card);border:1px solid var(--border-color);border-radius:var(--radius-lg);box-shadow:var(--shadow-xl);padding:8px;opacity:0;visibility:hidden;transform:translateY(-8px) scale(.97);transition:all .2s ease;z-index:999}.profile-dropdown.active{opacity:1;visibility:visible;transform:translateY(0) scale(1)}.profile-dropdown-header{display:flex;align-items:center;gap:12px;padding:12px}.profile-dropdown-divider{height:1px;background:var(--border-color);margin:4px 0}.profile-dropdown-item{display:flex;align-items:center;gap:10px;padding:10px 12px;font-size:.85rem;font-weight:500;color:var(--text-secondary);border-radius:var(--radius-sm);transition:all var(--transition-fast);cursor:pointer;width:100%;text-align:left;text-decoration:none}.profile-dropdown-item:hover{background:var(--bg-tertiary);color:var(--text-primary)}.profile-dropdown-item .material-icons-round{font-size:18px;color:var(--text-tertiary)}.profile-dropdown-item:hover .material-icons-round{color:var(--primary-500)}.profile-logout-btn:hover{background:#ef44440f;color:#ef4444}.profile-logout-btn:hover .material-icons-round{color:#ef4444!important}.btn-google-signin-nav{display:flex;align-items:center;gap:8px;padding:7px 16px;border-radius:var(--radius-full);background:var(--bg-card);border:1px solid var(--border-color);color:var(--text-primary);font-size:.82rem;font-weight:600;cursor:pointer;transition:all 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var(--transition-fast)}.mobile-menu-links a:hover,.mobile-menu-links a.active{color:var(--primary-500);background:var(--primary-50)}[data-theme=dark] .mobile-menu-links a:hover,[data-theme=dark] .mobile-menu-links a.active{background:#3b82f61a}.mobile-menu-links a .material-icons-round{font-size:20px}@media(max-width:900px){.navbar-bottom-row{display:none!important}.navbar-top-row{height:100%;border-bottom:none}.navbar-links{display:none}.mobile-menu-btn{display:flex}.mobile-menu-overlay,.mobile-menu{display:block}}@media(max-width:480px){.navbar-inner-top,.navbar-inner-bottom{padding:0 12px}.navbar-logo{font-size:1.15rem}}.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:12px 24px;font-size:.9rem;font-weight:600;border-radius:var(--radius-sm);transition:all var(--transition-fast);white-space:nowrap;cursor:pointer}.btn-primary{background:linear-gradient(135deg,var(--primary-500),var(--primary-600));color:#fff;box-shadow:0 2px 8px #3b82f64d}.btn-primary:hover{background:linear-gradient(135deg,var(--primary-600),var(--primary-700));box-shadow:0 4px 16px #3b82f666;transform:translateY(-1px);color:#fff}.btn-secondary{background:var(--bg-tertiary);color:var(--text-primary);border:1px solid var(--border-color)}.btn-secondary:hover{background:var(--bg-card-hover);border-color:var(--border-color-hover);transform:translateY(-1px);color:var(--text-primary)}.btn-download{background:linear-gradient(135deg,var(--success-500),#16a34a);color:#fff;padding:14px 32px;font-size:1rem;border-radius:var(--radius-md);box-shadow:0 4px 12px #22c55e4d}.btn-download:hover{transform:translateY(-2px);box-shadow:0 6px 20px #22c55e66;color:#fff}.btn-download .material-icons-round{animation:float 2s ease-in-out infinite}.btn-sm{padding:8px 16px;font-size:.8rem}.btn-lg{padding:16px 36px;font-size:1rem}.btn-icon{width:40px;height:40px;padding:0;border-radius:var(--radius-sm)}.resource-card{position:relative;background:var(--bg-card);border:1px solid var(--border-color);border-radius:var(--radius-lg);overflow:hidden;transition:all var(--transition-normal);cursor:pointer}.resource-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-xl);border-color:var(--primary-200)}[data-theme=dark] .resource-card:hover{border-color:var(--primary-800)}.card-image{position:relative;width:100%;height:200px;overflow:hidden;background:var(--bg-tertiary)}.card-image img{width:100%;height:100%;object-fit:cover;transition:transform var(--transition-slow)}.resource-card:hover .card-image img{transform:scale(1.05)}.card-badge{position:absolute;top:12px;left:12px;padding:4px 12px;font-size:.75rem;font-weight:600;color:#fff;border-radius:var(--radius-full);z-index:2}.card-type-badge{position:absolute;top:12px;right:12px;padding:4px 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var(--border-color);border-radius:var(--radius-full);white-space:nowrap;transition:all var(--transition-fast);cursor:pointer}.category-tab:hover{color:var(--primary-500);border-color:var(--primary-200);background:var(--primary-50)}[data-theme=dark] .category-tab:hover{background:#3b82f61a;border-color:#3b82f64d}.category-tab.active{color:#fff;background:linear-gradient(135deg,var(--primary-500),var(--primary-600));border-color:transparent;box-shadow:0 2px 8px #3b82f64d}.category-tab .tab-count{display:inline-flex;align-items:center;justify-content:center;min-width:20px;height:20px;padding:0 6px;font-size:.7rem;font-weight:700;background:#0000001a;border-radius:var(--radius-full)}.category-tab.active .tab-count{background:#ffffff40}.search-container{position:relative;width:100%;max-width:500px}.search-input-wrapper{position:relative;display:flex;align-items:center}.search-input{width:100%;padding:14px 20px 14px 48px;background:var(--bg-card);border:2px solid var(--border-color);border-radius:var(--radius-lg);font-size:.95rem;color:var(--text-primary);transition:all var(--transition-fast)}.search-input:focus{border-color:var(--primary-500);box-shadow:0 0 0 4px #3b82f61a}.search-input::placeholder{color:var(--text-tertiary)}.search-icon{position:absolute;left:16px;color:var(--text-tertiary);font-size:20px;pointer-events:none;transition:color var(--transition-fast)}.search-input:focus~.search-icon,.search-input-wrapper:focus-within .search-icon{color:var(--primary-500)}.footer{background:var(--bg-secondary);border-top:1px solid var(--border-color);padding:60px 0 0}.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:48px;margin-bottom:48px}.footer-brand{max-width:300px}.footer-brand-logo{display:flex;align-items:center;gap:10px;margin-bottom:16px}.footer-brand-logo 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var(--border-color);border-radius:var(--radius-lg);padding:28px 24px;text-align:center;transition:all var(--transition-normal);cursor:pointer;box-shadow:var(--shadow-md)}.quick-category-card:hover{transform:translateY(-6px);box-shadow:var(--shadow-xl)}.quick-category-card .cat-icon{width:56px;height:56px;border-radius:var(--radius-md);display:flex;align-items:center;justify-content:center;margin:0 auto 16px;font-size:28px;color:#fff}.quick-category-card h3{font-size:1.05rem;margin-bottom:6px}.quick-category-card p{font-size:.82rem}@media(max-width:768px){.quick-categories{grid-template-columns:repeat(2,1fr);margin-top:-40px}}@media(max-width:480px){.quick-categories{grid-template-columns:1fr 1fr;gap:12px}.quick-category-card{padding:20px 16px}}.section-header{display:flex;align-items:flex-end;justify-content:space-between;margin-bottom:32px;flex-wrap:wrap;gap:16px}.section-header h2{font-size:clamp(1.5rem,3vw,2rem)}.section-header p{font-size:1rem;margin-top:4px}.section-header 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.material-icons-round{font-size:20px;color:var(--primary-500)}.download-meta-item .meta-label{font-size:.75rem;color:var(--text-tertiary);text-transform:uppercase;letter-spacing:.5px}.download-meta-item .meta-value{font-size:.95rem;font-weight:600;color:var(--text-primary)}.download-cta{margin-bottom:24px}.download-cta .btn-download{width:100%;padding:18px 32px;font-size:1.1rem}.download-share{display:flex;align-items:center;gap:12px}.download-share span{font-size:.85rem;color:var(--text-tertiary);font-weight:500}.download-share .share-btn{width:40px;height:40px;border-radius:var(--radius-sm);background:var(--bg-secondary);border:1px solid var(--border-color);display:flex;align-items:center;justify-content:center;color:var(--text-secondary);font-size:18px;transition:all var(--transition-fast)}.download-share 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.material-icons-round{font-size:40px;color:var(--primary-500);margin-bottom:16px}.about-feature h4{margin-bottom:8px}@media(max-width:768px){.about-features{grid-template-columns:1fr}}.contact-page{padding-top:var(--navbar-height)}.contact-grid{display:grid;grid-template-columns:1fr 1fr;gap:48px;padding:60px 0}.contact-form{display:flex;flex-direction:column;gap:20px}.form-group{display:flex;flex-direction:column;gap:6px}.form-group label{font-size:.85rem;font-weight:600;color:var(--text-primary)}.form-group input,.form-group textarea{padding:14px 16px;background:var(--bg-secondary);border:2px solid var(--border-color);border-radius:var(--radius-md);color:var(--text-primary);transition:border-color var(--transition-fast)}.form-group input:focus,.form-group textarea:focus{border-color:var(--primary-500);box-shadow:0 0 0 4px #3b82f61a}.form-group 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.divider{color:var(--text-tertiary);-webkit-user-select:none;user-select:none}.breadcrumbs .crumb-text{color:var(--text-tertiary);font-weight:500}.subject-tag{display:inline-flex;align-items:center;gap:6px;padding:6px 14px;font-size:.78rem;font-weight:700;background:#3b82f614;color:var(--primary-600);border-radius:var(--radius-full);text-transform:uppercase;letter-spacing:.5px}[data-theme=dark] .subject-tag{background:#3b82f626;color:var(--primary-400)}.university-materials-main{padding:40px 0 80px;min-height:50vh}.resources-info-bar{display:flex;align-items:center;justify-content:space-between;margin-bottom:24px;padding-bottom:16px;border-bottom:1px solid var(--border-color)}.resources-info-bar .info-text{display:flex;align-items:center;gap:8px;font-size:.9rem;color:var(--text-secondary)}.resources-info-bar .info-text .material-icons-round{color:var(--primary-500);font-size:18px}.univ-card-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:30px}.empty-state{display:flex;flex-direction:column;align-items:center;justify-content:center;text-align:center;max-width:600px;margin:40px auto;padding:48px 32px;background:var(--bg-glass-strong);border:1px solid var(--border-color);border-radius:var(--radius-lg);box-shadow:var(--shadow-sm)}.empty-icon-wrap{width:80px;height:80px;border-radius:var(--radius-full);background:#3b82f60d;color:var(--primary-500);display:flex;align-items:center;justify-content:center;margin-bottom:24px}[data-theme=dark] .empty-icon-wrap{background:#3b82f61f;color:var(--primary-400)}.empty-icon-wrap .material-icons-round{font-size:40px}.empty-state h2{font-size:1.4rem;font-weight:800;margin-bottom:12px;color:var(--text-primary)}.empty-state p{font-size:.92rem;color:var(--text-secondary);line-height:1.6;margin-bottom:28px}.empty-actions{display:flex;gap:16px;justify-content:center;flex-wrap:wrap}@media(max-width:480px){.empty-actions{flex-direction:column;width:100%}.empty-actions .btn{width:100%}}.glass-card{background:var(--bg-glass-strong);backdrop-filter:blur(20px);-webkit-backdrop-filter:blur(20px);border:1px solid var(--border-color);border-radius:var(--radius-lg);box-shadow:var(--shadow-lg);transition:transform var(--transition-normal),box-shadow var(--transition-normal)}.chat-wrapper{display:flex;flex-direction:column;height:600px;max-height:calc(100vh - 250px);min-height:450px;overflow:hidden;position:relative;background:var(--bg-glass-strong);border:1px solid var(--border-color);border-radius:var(--radius-lg);box-shadow:var(--shadow-lg)}.chat-header{padding:16px 24px;border-bottom:1px solid var(--border-color);display:flex;justify-content:space-between;align-items:center;background:#fff3}[data-theme=dark] .chat-header{background:#00000026}.chat-tutor-profile{display:flex;align-items:center;gap:12px}.tutor-avatar{width:40px;height:40px;border-radius:var(--radius-full);background:linear-gradient(135deg,var(--primary-500),var(--accent-500));color:#fff;display:flex;align-items:center;justify-content:center;box-shadow:0 4px 10px #3b82f640}.tutor-details h3{font-size:1rem;font-weight:700;margin:0;color:var(--text-primary)}.tutor-status{font-size:.75rem;color:var(--text-secondary);display:flex;align-items:center;gap:4px}.chat-clear-btn{color:var(--text-secondary);width:36px;height:36px;border-radius:var(--radius-sm);display:flex;align-items:center;justify-content:center;transition:all var(--transition-fast);border:1px solid transparent}.chat-clear-btn:hover{background:#ef44441a;color:var(--error-500)}.chat-body{flex:1;padding:24px;overflow-y:auto;-webkit-overflow-scrolling:touch;display:flex;flex-direction:column;gap:20px;scroll-behavior:smooth;background:#ffffff05}[data-theme=dark] .chat-body{background:#0000000d}.message-row{display:flex;gap:12px;width:100%}.tutor-row{justify-content:flex-start}.student-row{justify-content:flex-end}.message-avatar{width:32px;height:32px;border-radius:var(--radius-full);display:flex;align-items:center;justify-content:center;flex-shrink:0;margin-top:4px}.student-avatar{background:var(--gray-200);color:var(--gray-700)}[data-theme=dark] .student-avatar{background:var(--gray-700);color:var(--gray-200)}.message-bubble{max-width:75%;padding:12px 18px;border-radius:var(--radius-md);font-size:.95rem;line-height:1.5;word-break:break-word;box-shadow:var(--shadow-sm)}.tutor-bubble{background:var(--bg-card);color:var(--text-primary);border-top-left-radius:2px;border:1px solid var(--border-color)}.student-bubble{background:linear-gradient(135deg,var(--primary-600),var(--primary-700));color:#fff;border-top-right-radius:2px}[data-theme=dark] 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var(--transition-fast);cursor:pointer}.suggestion-chip:hover{background:var(--primary-50);border-color:var(--primary-300);color:var(--primary-600);transform:translateY(-1px)}[data-theme=dark] .suggestion-chip:hover{background:#3b82f61a;border-color:var(--primary-500);color:var(--primary-400)}.chat-footer{padding:16px 24px;border-top:1px solid var(--border-color);background:var(--bg-card)}.chat-input-wrapper{display:flex;align-items:flex-end;gap:12px;background:var(--bg-secondary);border:1px solid var(--border-color);border-radius:var(--radius-md);padding:8px 12px;transition:border-color var(--transition-fast),box-shadow var(--transition-fast)}.chat-input-wrapper:focus-within{border-color:var(--primary-400);box-shadow:0 0 0 3px #3b82f626}#chat-input{flex:1;background:transparent;color:var(--text-primary);border:none;resize:none;font-size:.95rem;padding:6px 4px;max-height:150px;min-height:24px;line-height:1.4}.chat-send-btn{width:36px;height:36px;border-radius:var(--radius-sm);background:var(--primary-500);color:#fff;display:flex;align-items:center;justify-content:center;transition:all var(--transition-fast);cursor:pointer;flex-shrink:0}.chat-send-btn:hover:not(:disabled){background:var(--primary-600);transform:scale(1.05)}.chat-send-btn:disabled{background:var(--gray-300);color:var(--gray-500);cursor:not-allowed}[data-theme=dark] .chat-send-btn:disabled{background:var(--gray-700);color:var(--gray-500)}.typing-indicator{display:flex;align-items:center;gap:4px;padding:4px 6px}.typing-indicator span{width:8px;height:8px;background-color:var(--text-secondary);border-radius:50%;display:inline-block;opacity:.4;animation:typing-bounce 1.4s infinite ease-in-out both}.typing-indicator span:nth-child(1){animation-delay:0s}.typing-indicator span:nth-child(2){animation-delay:.2s}.typing-indicator span:nth-child(3){animation-delay:.4s}@keyframes typing-bounce{0%,80%,to{transform:scale(.6);opacity:.4}40%{transform:scale(1);opacity:1}}.code-block{margin:12px 0;background:#1e1e1e!important;color:#d4d4d4;border-radius:var(--radius-sm);border:1px solid rgba(255,255,255,.1);overflow:hidden;font-family:var(--font-mono);font-size:.85rem}.code-header{display:flex;justify-content:space-between;align-items:center;background:#2d2d2d;padding:6px 12px;font-size:.75rem;color:#a0a0a0;text-transform:uppercase;font-weight:600;border-bottom:1px solid #3c3c3c}.copy-code-btn{background:transparent;border:1px solid #4d4d4d;color:#a0a0a0;padding:2px 8px;border-radius:4px;cursor:pointer;font-size:.7rem;transition:all .2s}.copy-code-btn:hover{background:#4d4d4d;color:#fff}.code-block code{display:block;padding:12px;overflow-x:auto;white-space:pre}code:not(.code-block code){background:#3b82f61a;color:var(--primary-600);padding:2px 6px;border-radius:4px;font-family:var(--font-mono);font-size:.9em}[data-theme=dark] code:not(.code-block code){background:#3b82f633;color:var(--primary-300)}.subjects-directory-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:24px}.subject-directory-card{padding:24px;display:flex;flex-direction:column;gap:20px;border-radius:var(--radius-lg);transition:all var(--transition-normal)}.subject-directory-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-lg);border-color:var(--primary-300)}[data-theme=dark] .subject-directory-card:hover{border-color:var(--primary-500)}.subject-dir-header{display:flex;align-items:center;gap:16px}.subject-dir-icon{width:48px;height:48px;border-radius:var(--radius-md);background:#3b82f614;display:flex;align-items:center;justify-content:center;font-size:1.6rem;flex-shrink:0}[data-theme=dark] .subject-dir-icon{background:#3b82f629}.subject-dir-info h3{font-size:1.1rem;font-weight:700;margin-bottom:4px;color:var(--text-primary)}.subject-dir-count{font-size:.8rem;color:var(--text-tertiary)}.subject-dir-actions{display:grid;grid-template-columns:1fr 1fr;gap:10px}.subj-explore-btn{display:flex;align-items:center;justify-content:center;gap:6px;padding:10px 8px;font-size:.78rem;font-weight:600;border-radius:var(--radius-sm);background:var(--bg-secondary);color:var(--text-secondary);border:1px solid var(--border-color);transition:all var(--transition-fast);cursor:pointer}.subj-explore-btn:hover:not(:disabled){background:var(--primary-50);border-color:var(--primary-300);color:var(--primary-600)}[data-theme=dark] .subj-explore-btn:hover:not(:disabled){background:#3b82f61a;border-color:var(--primary-500);color:var(--primary-400)}.subj-explore-btn:disabled{opacity:.45;cursor:not-allowed}.subj-explore-btn .material-icons-round{font-size:14px}.status-dot{width:8px;height:8px;border-radius:50%;background-color:var(--success-500);display:inline-block;box-shadow:0 0 8px var(--success-500);animation:pulse 2s infinite}.ai-suggested-image-wrap{box-shadow:var(--shadow-md);transition:transform var(--transition-normal),box-shadow var(--transition-normal)}.ai-suggested-image-wrap:hover{transform:translateY(-2px);box-shadow:var(--shadow-lg)}.ai-suggested-image{transition:transform .5s ease}.ai-suggested-image-wrap:hover .ai-suggested-image{transform:scale(1.03)}.ai-search-results-html{color:var(--text-secondary)}.ai-search-results-html h3{font-size:1.15rem;font-weight:700;color:var(--text-primary);margin-top:24px;margin-bottom:12px}.ai-search-results-html h3:first-child{margin-top:0}.ai-search-results-html p{margin-bottom:16px}.ai-download-btn{transition:all var(--transition-fast)!important}.ai-download-btn:hover{transform:translateY(-2px);box-shadow:0 6px 14px #3b82f659!important;color:#fff!important}.ai-link{transition:color var(--transition-fast)}.ai-link:hover{color:var(--primary-600)!important}[data-theme=dark] .ai-link:hover{color:var(--primary-400)!important}.ai-search-btn-primary{transition:all var(--transition-fast)}.ai-search-btn-primary:hover{transform:translateY(-2px);box-shadow:0 6px 16px #3b82f666!important}.avatar-choice-item{position:relative;background:var(--bg-secondary)}.avatar-choice-item.active{border-color:var(--primary-500)!important;transform:scale(1.08);box-shadow:0 0 12px #3b82f666}.avatar-choice-item:hover{transform:scale(1.08);border-color:var(--primary-300)}.avatar-gallery{transition:all var(--transition-normal)}.ai-youtube-card{transition:transform var(--transition-normal),box-shadow var(--transition-normal)}.ai-youtube-card:hover{transform:translateY(-2px);box-shadow:var(--shadow-lg)}.video-container{position:relative;padding-bottom:56.25%;height:0;overflow:hidden;max-width:100%;background:#000}.video-container iframe{position:absolute;top:0;left:0;width:100%;height:100%;border:0}