.message-overlay{background:#0206178c;inset:0;z-index:1200}.message-box{background:linear-gradient(180deg,#fff,#f8fafc);border-radius:14px;box-shadow:0 12px 40px #02061773;display:flex;flex-direction:column;max-width:760px}.message-header{border-bottom:1px solid #0f172a0a;padding:18px 20px}.message-header h2{color:#0f172a;font-size:1.15rem}.close-btn{background:#0000;color:#475569;font-size:20px}.message-content{align-items:flex-start;display:flex;gap:18px;padding:22px}.message-icon{align-items:center;background:linear-gradient(135deg,#eef2ff,#e0f2fe);border-radius:12px;color:#0f172a;display:flex;flex-shrink:0;font-size:36px;height:72px;justify-content:center;width:72px}.message-content p{color:#0f172a;line-height:1.45;margin:0 0 12px}.premium-contact .contact-prompt{color:#475569;font-size:.95rem;margin-bottom:12px}.contact-actions{gap:10px}.action-btn,.chat-btn,.ok-btn,.whatsapp-btn{border:none;border-radius:10px;cursor:pointer;font-weight:600;padding:10px 14px}.whatsapp-btn{background:linear-gradient(90deg,#25d366,#128c7e)}.chat-btn{background:#eef2ff;color:#0f172a}.action-btn{background:linear-gradient(90deg,#7c3aed,#4f46e5)}.ok-btn{background:#0000;color:#0f172a}.message-footer{border-top:1px solid #0f172a0a;display:flex;gap:10px;justify-content:flex-end;padding:14px 20px}.chat-overlay{align-items:center;display:flex;inset:0;justify-content:center;position:fixed;z-index:1300}.chat-bubble{background:#fff;border-radius:12px;box-shadow:0 10px 30px #02061733;max-width:calc(100% - 48px);overflow:hidden;width:420px}.chat-header{border-bottom:1px solid #f1f5f9;padding:12px 14px}.chat-messages{max-height:240px;overflow:auto;padding:14px}.admin-message{background:#f1f5f9}.chat-input{border-top:1px solid #f1f5f9;gap:8px;padding:12px}.chat-input input{border:1px solid #e6edf3;border-radius:8px;padding:10px 12px}.chat-input button{background:#0f172a;border-radius:8px;padding:10px 12px}@media (max-width:640px){.message-box{max-width:92%}.message-content{flex-direction:column}.message-icon{font-size:28px;height:56px;width:56px}}.message-overlay{align-items:center;background-color:#0009;bottom:0;display:flex;justify-content:center;left:0;padding:20px;position:fixed;right:0;top:0;z-index:1000}.message-box{animation:popIn .3s ease-out;background:#fff;border-radius:12px;box-shadow:0 10px 30px #00000026;max-width:450px;overflow:hidden;width:100%}@keyframes popIn{0%{opacity:0;transform:scale(.9)}to{opacity:1;transform:scale(1)}}.message-box.premium{border-top:4px solid gold}.message-header{background:linear-gradient(135deg,#6a11cb,#2575fc);color:#fff;padding:20px}.message-header h2{font-size:1.5rem;margin:0}.close-btn{align-items:center;border-radius:50%;color:#fff;display:flex;font-size:24px;height:30px;justify-content:center;padding:0;transition:background-color .2s;width:30px}.close-btn:hover{background-color:#fff3}.message-content{padding:25px;text-align:center}.message-icon{font-size:3rem;margin-bottom:15px}.message-content p{color:#555;font-size:1.1rem;line-height:1.5;margin-bottom:20px}.premium-contact{border-top:1px solid #eee;margin-top:20px;padding-top:20px}.contact-prompt{font-size:1rem;margin-bottom:20px}.chat-link,.whatsapp-link{color:#25d366;font-weight:600}.chat-link:hover,.whatsapp-link:hover{color:#128c7e;text-decoration:underline}.contact-actions{display:flex;flex-wrap:wrap;gap:12px;justify-content:center}.chat-btn,.whatsapp-btn{align-items:center;border:none;border-radius:8px;cursor:pointer;display:flex;font-weight:600;gap:8px;padding:10px 16px;transition:all .2s}.whatsapp-btn{background-color:#25d366;color:#fff}.whatsapp-btn:hover{background-color:#128c7e;transform:translateY(-2px)}.chat-btn{background-color:#6a11cb;color:#fff}.chat-btn:hover{background-color:#2575fc;transform:translateY(-2px)}.message-footer{padding:15px 25px 25px;text-align:center}.ok-btn{background:linear-gradient(135deg,#6a11cb,#2575fc);border:none;border-radius:8px;color:#fff;cursor:pointer;font-size:1rem;font-weight:600;padding:12px 24px;transition:transform .2s,box-shadow .2s}.ok-btn:hover{box-shadow:0 4px 8px #0000001a;transform:translateY(-2px)}.chat-header{background:linear-gradient(135deg,#6a11cb,#2575fc);padding:15px}.chat-header h3{font-size:1.2rem;margin:0}.close-chat{align-items:center;border-radius:50%;display:flex;font-size:20px;height:24px;justify-content:center;padding:0;width:24px}.close-chat:hover{background-color:#fff3}.chat-messages{background-color:#f9f9f9;height:150px;padding:15px}.admin-message{background-color:#e8f4f8;border-radius:10px;margin-bottom:10px;max-width:80%;padding:10px}.admin-message p{font-size:.9rem;margin:0 0 5px}.message-time{color:#888;font-size:.7rem}.chat-input{background:#fff;border-top:1px solid #eee;padding:15px}.chat-input input{border:1px solid #ddd;font-size:.9rem;margin-right:10px;padding:10px}.chat-input button{background:linear-gradient(135deg,#6a11cb,#2575fc);border:none;border-radius:20px;color:#fff;cursor:pointer;font-weight:600;padding:10px 15px;transition:opacity .2s}.chat-input button:hover{opacity:.9}@media (max-width:500px){.message-overlay{padding:10px}.message-box{max-width:100%}.contact-actions{flex-direction:column}.chat-btn,.whatsapp-btn{justify-content:center;width:100%}.chat-bubble{bottom:10px;right:10px;width:280px}}.auth-container{align-items:center;display:flex;justify-content:center;min-height:100vh;overflow:hidden;position:relative;transition:background .5s ease}.background-overlay{background:#0009;bottom:0;left:0;position:absolute;right:0;top:0;z-index:1}.auth-layout{margin:0 auto;max-width:1200px;padding:1rem;position:relative;width:100%;z-index:2}.auth-form-section{align-items:center;display:flex;flex-direction:column;justify-content:center;padding:2rem;width:100%}.logo-container{margin-bottom:2rem;text-align:center}.logo-text{color:#fff;font-size:3rem;font-weight:700;margin-bottom:.5rem;text-shadow:0 2px 10px #00000080}.tagline{color:#ffffffe6;font-size:1.1rem;text-shadow:0 1px 3px #00000080}.auth-card{-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);background:#fffffff2;border-radius:1.5rem;box-shadow:0 20px 40px #0003;max-width:450px;padding:2.5rem;position:relative;width:100%}.auth-header{margin-bottom:2rem;position:relative;text-align:center}.back-button{border-radius:.5rem;color:#3b82f6;font-size:1.2rem;left:0;padding:.5rem;position:absolute;top:0;transition:background-color .2s}.back-button:hover{background:#f3f4f6}.auth-header h2{color:#1f2937;font-size:1.75rem;font-weight:700;margin-bottom:.5rem}.auth-header p{color:#6b7280;font-size:1rem}.auth-methods-container{display:flex;flex-direction:column;gap:.5rem;margin-bottom:1.5rem}.auth-method-button{align-items:center;background:#f8f9fc;border:2px solid #e5e7eb;border-radius:1rem;cursor:pointer;display:flex;font-size:1.1rem;justify-content:space-between;padding:1.25rem;transition:all .3s ease;width:100%}.auth-method-button:hover{background:#f1f5f9;border-color:#3b82f6;box-shadow:0 4px 12px #3b82f626;transform:translateY(-2px)}.auth-method-button:disabled{cursor:not-allowed;opacity:.6;transform:none}.auth-method-button svg:first-child{color:#3b82f6;font-size:1.3rem}.auth-method-button svg:last-child{color:#6b7280;font-size:1rem}.auth-method-text{color:#374151;flex:1 1;font-weight:600;margin-left:1rem;text-align:left}.phone-input-container{display:flex;gap:.75rem;margin-bottom:1.5rem}.country-code-button{align-items:center;background:#f8f9fc;border:2px solid #d1d5db;border-radius:.75rem;cursor:pointer;display:flex;gap:.5rem;justify-content:space-between;min-width:120px;padding:.75rem 1rem;transition:all .2s}.country-code-button:hover{border-color:#3b82f6}.country-code-text{color:#374151;font-weight:500}.phone-input{border:2px solid #d1d5db;border-radius:.75rem;flex:1 1;font-size:1rem;padding:.75rem 1rem;transition:all .2s}.phone-input:focus{border-color:#3b82f6;box-shadow:0 0 0 3px #3b82f61a;outline:none}.country-picker-modal{align-items:center;bottom:0;display:none;justify-content:center;left:0;position:fixed;right:0;top:0;z-index:1000}.country-picker-modal.show{display:flex}.country-picker-backdrop{background:#00000080;bottom:0;left:0;position:absolute;right:0;top:0}.country-picker-content{background:#fff;border-radius:1rem;box-shadow:0 20px 40px #0003;max-height:80vh;max-width:400px;overflow:hidden;padding:1.5rem;position:relative;width:90%;z-index:1001}.country-picker-header{align-items:center;border-bottom:1px solid #e5e7eb;display:flex;justify-content:space-between;margin-bottom:1rem;padding-bottom:1rem}.country-picker-header h3{color:#1f2937;font-size:1.25rem;margin:0}.close-button{background:none;border:none;border-radius:.5rem;color:#6b7280;cursor:pointer;padding:.5rem;transition:background-color .2s}.close-button:hover{background:#f3f4f6}.country-list{max-height:300px;overflow-y:auto}.country-item{align-items:center;background:none;border:none;border-radius:.5rem;cursor:pointer;display:flex;gap:1rem;padding:1rem;transition:background-color .2s;width:100%}.country-item:hover{background:#f3f4f6}.country-item.selected{background:#3b82f6;color:#fff}.country-flag{font-size:1.25rem;width:30px}.country-name{flex:1 1;font-weight:500;text-align:left}.country-code{color:inherit;font-weight:500}.telegram-section-compact{display:flex;justify-content:center;margin:1.5rem 0}.cute-telegram-download{text-align:center}.telegram-bubble{animation:float 3s ease-in-out infinite;background:linear-gradient(135deg,#08c,#26a5e4);border-radius:2rem;box-shadow:0 4px 15px #0088cc4d;display:inline-block;padding:.5rem;transition:all .3s ease}.telegram-bubble:hover{box-shadow:0 6px 20px #08c6;transform:scale(1.05)}.telegram-btn{align-items:center;background:none;border:none;border-radius:1.5rem;color:#fff;cursor:pointer;display:flex;font-weight:600;gap:.75rem;padding:.75rem 1.25rem;transition:all .3s ease}.telegram-icon{font-size:1.5rem}.download-icon{font-size:1rem;opacity:.9}.telegram-text{font-size:.9rem}.telegram-tooltip{margin-top:.75rem}.telegram-tooltip p{color:#6b7280;font-size:.8rem;font-style:italic;margin:0}@keyframes float{0%,to{transform:translateY(0)}50%{transform:translateY(-5px)}}.auth-form{space-y:1.5rem}.form-group{space-y:.5rem}.form-group label{color:#374151;font-size:.9rem;gap:.5rem}.form-group label svg{color:#6b7280;width:1rem}.form-group input{background:#fff;border:2px solid #d1d5db;border-radius:.75rem;font-size:1rem;padding:.75rem 1rem;transition:all .2s;width:100%}.form-group input:focus{border-color:#3b82f6;box-shadow:0 0 0 3px #3b82f61a;outline:none}.form-group input:disabled{background:#f9fafb;cursor:not-allowed}.terms-section{background:#f8fafc;border:1px solid #e2e8f0;border-radius:.75rem;padding:1.25rem}.terms-title{align-items:center;color:#374151;display:flex;font-size:.9rem;font-weight:600;gap:.5rem;margin-bottom:1rem}.terms-checkbox{align-items:flex-start;cursor:pointer;display:flex;font-size:.9rem;gap:.75rem;margin-bottom:.75rem}.terms-checkbox input{display:none}.checkmark{align-items:center;border:2px solid #d1d5db;border-radius:.25rem;display:flex;flex-shrink:0;height:1.25rem;justify-content:center;width:1.25rem}.terms-checkbox input:checked+.checkmark{background:#3b82f6;border-color:#3b82f6}.terms-checkbox input:checked+.checkmark:after{color:#fff;content:"✓";font-size:.8rem}.checkbox-text{color:#4b5563;line-height:1.4}.terms-link{background:none;border:none;color:#3b82f6;cursor:pointer;font-size:inherit;text-decoration:underline}.terms-link:hover{color:#1d4ed8}.message-container{background:#fef2f2;border:1px solid #fecaca;border-radius:.75rem;margin-bottom:1rem;padding:1rem;text-align:center}.auth-message{align-items:center;border-radius:.75rem;display:flex;font-size:.9rem;gap:.5rem;padding:1rem}.auth-message.success{background:#d4edda;border:1px solid #c3e6cb;color:#155724}.auth-message.error{background:#f8d7da;border:1px solid #f5c6cb;color:#721c24}.auth-message.warning{background:#fef3c7;border:1px solid #fcd34d;color:#92400e}.auth-btn{align-items:center;border:none;border-radius:.75rem;cursor:pointer;display:flex;font-size:1rem;font-weight:600;gap:.5rem;justify-content:center;padding:1rem;transition:all .2s;width:100%}.auth-btn.primary{background:#3b82f6;color:#fff}.auth-btn.primary:hover:not(:disabled){background:#2563eb;transform:translateY(-1px)}.auth-btn:disabled{cursor:not-allowed;opacity:.6;transform:none}.forgot-password-btn{background:none;border:none;color:#3b82f6;cursor:pointer;font-size:.9rem;margin-top:1rem;text-decoration:underline}.forgot-password-btn:hover{color:#1d4ed8}.auth-footer{margin-top:1.5rem;text-align:center}.auth-footer p{color:#6b7280;font-size:.9rem;line-height:1.5;margin-bottom:1rem}.switch-mode{background:none;border:none;color:#3b82f6;cursor:pointer;font-weight:600;margin-left:.25rem}.switch-mode:hover{color:#1d4ed8}.spinner{height:1.25rem;width:1.25rem}.spinner-small{animation:spin 1s linear infinite;border:2px solid #0000;border-radius:50%;border-top-color:currentcolor;height:1rem;width:1rem}@media (max-width:768px){.auth-layout{padding:.5rem}.auth-form-section{padding:1rem}.auth-card{border-radius:1rem;padding:2rem 1.5rem}.logo-text{font-size:2.5rem}.tagline{font-size:1rem}.phone-input-container{flex-direction:column}.country-code-button{min-width:auto}}@media (prefers-color-scheme:dark){.auth-card{background:#1f2937f2}.auth-card,.auth-header h2{color:#f9fafb}.auth-header p{color:#d1d5db}.auth-method-button{background:#374151;border-color:#4b5563;color:#f9fafb}.auth-method-button:hover{background:#4b5563}.form-group label{color:#e5e7eb}.form-group input{background:#374151;border-color:#4b5563;color:#f9fafb}.form-group input:focus{border-color:#3b82f6}.country-code-button,.phone-input{background:#374151;border-color:#4b5563;color:#f9fafb}.country-picker-content{background:#1f2937;color:#f9fafb}.country-picker-header h3{color:#f9fafb}.country-item:hover,.terms-section{background:#374151}.terms-section{border-color:#4b5563}.terms-title{color:#e5e7eb}.checkbox-text{color:#d1d5db}.visible-recaptcha{border-radius:4px;box-shadow:0 2px 10px #0000001a;height:78px;margin:15px auto;overflow:hidden;width:304px}.recaptcha-note{background:#3b82f61a;border-left:4px solid #3b82f6;border-radius:8px;margin:20px 0;padding:15px;text-align:center}.recaptcha-note p{align-items:center;color:#1e40af;display:flex;font-size:14px;gap:8px;justify-content:center;margin:0 0 10px}.auth-buttons{display:flex;flex-direction:column;gap:12px;margin-top:20px}.auth-btn.success{background:linear-gradient(135deg,#10b981,#059669)}.auth-btn.secondary{background:#0000;border:2px solid #6b7280;color:#6b7280}.auth-btn.secondary:hover{background:#6b7280;color:#fff}.g-recaptcha{transform:scale(.9);transform-origin:0 0}}.email-verification-container{align-items:center;background:linear-gradient(135deg,#667eea,#764ba2);display:flex;justify-content:center;min-height:100vh;padding:20px}.email-verification-card{background:#fff;border-radius:16px;box-shadow:0 20px 40px #0000001a;max-width:500px;padding:40px;text-align:center;width:100%}.verification-header{margin-bottom:30px}.verification-icon{align-items:center;background:linear-gradient(135deg,#667eea,#764ba2);border-radius:50%;display:flex;height:80px;justify-content:center;margin:0 auto 20px;width:80px}.verification-icon svg{color:#fff;font-size:2rem}.verification-header h1{color:#2d3748;font-size:2rem;font-weight:700;margin-bottom:10px}.verification-header p{color:#718096;font-size:1.1rem}.email-display{align-items:center;background:#f7fafc;border-left:4px solid #667eea;border-radius:8px;display:flex;flex-direction:column;margin-bottom:25px;padding:16px}.email-label{color:#718096;font-size:.875rem;font-weight:600;margin-bottom:5px}.email-address{color:#2d3748;font-size:1.25rem;font-weight:600}.instructions{background:#f7fafc;border-radius:12px;margin-bottom:25px;padding:20px;text-align:left}.instructions h3{color:#2d3748;font-size:1.2rem;margin-bottom:15px;text-align:center}.steps-list{flex-direction:column}.step,.steps-list{display:flex;gap:12px}.step{align-items:flex-start}.step-number{align-items:center;background:#667eea;border-radius:50%;color:#fff;display:flex;flex-shrink:0;font-size:.875rem;font-weight:700;height:24px;justify-content:center;margin-top:2px;width:24px}.step-text{color:#4a5568;flex:1 1;line-height:1.5}.message.success{background:#f0fff4;border-left-color:#48bb78;color:#2f855a}.message.info{background:#ebf8ff;border-left-color:#4299e1;color:#2b6cb0}.action-buttons{flex-direction:column;gap:12px;margin-bottom:20px}.btn-primary,.btn-secondary{align-items:center;border:none;border-radius:12px;cursor:pointer;display:flex;font-size:1rem;font-weight:600;gap:10px;justify-content:center;padding:16px 24px;transition:all .3s ease}.btn-primary{background:linear-gradient(135deg,#667eea,#764ba2)}.btn-primary:hover:not(:disabled){box-shadow:0 10px 20px #667eea4d;transform:translateY(-2px)}.btn-secondary{background:#0000;border:2px solid #667eea;color:#667eea}.btn-secondary:hover:not(:disabled){background:#667eea;color:#fff}.btn-primary:disabled,.btn-secondary:disabled{cursor:not-allowed;opacity:.6;transform:none}.auto-check-note{justify-content:center;margin-bottom:20px}.auto-check-note,.sign-out-btn{align-items:center;color:#718096;display:flex;font-size:.875rem;gap:8px}.sign-out-btn{background:none;border:none;border-radius:6px;cursor:pointer;margin:0 auto;padding:8px 16px;transition:all .3s ease}.sign-out-btn:hover{background:#f7fafc;color:#4a5568}.spinner{border-top-color:currentcolor}@media (max-width:640px){.email-verification-container{padding:10px}.email-verification-card{padding:24px}.verification-header h1{font-size:1.5rem}.action-buttons{gap:8px}.btn-primary,.btn-secondary{font-size:.9rem;padding:14px 20px}}.class-selection-container{align-items:center;background:linear-gradient(135deg,#667eea,#764ba2);display:flex;justify-content:center;min-height:100vh;padding:20px}.class-selection-card{background:#fff;border-radius:16px;box-shadow:0 20px 40px #0000001a;max-width:800px;padding:40px;width:100%}.selection-header{margin-bottom:40px;text-align:center}.selection-header h1{color:#2d3748;font-size:2.5rem;font-weight:700;margin-bottom:10px}.selection-header p{color:#718096;font-size:1.2rem;line-height:1.5}.classes-grid{grid-gap:20px;display:grid;gap:20px;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));margin-bottom:30px}.class-card{background:#f7fafc;border:2px solid #e2e8f0;border-radius:12px;cursor:pointer;overflow:hidden;padding:24px;position:relative;transition:all .3s ease}.class-card:hover:not(.disabled){border-color:#667eea;box-shadow:0 10px 25px #0000001a;transform:translateY(-4px)}.class-card.selected{background:linear-gradient(135deg,#667eea,#764ba2);border-color:#667eea;color:#fff}.class-card.disabled{cursor:not-allowed;opacity:.6}.class-content{gap:16px}.class-content,.class-icon{align-items:center;display:flex}.class-icon{background:#667eea1a;border-radius:12px;flex-shrink:0;height:60px;justify-content:center;transition:all .3s ease;width:60px}.class-card.selected .class-icon{background:#fff3}.class-icon svg{color:#667eea;font-size:1.5rem;transition:all .3s ease}.class-card.selected .class-icon svg{color:#fff}.class-info{flex:1 1}.class-name{color:#2d3748;font-size:1.25rem;font-weight:600;margin-bottom:4px;transition:all .3s ease}.class-card.selected .class-name{color:#fff}.class-description{color:#718096;font-size:.9rem;transition:all .3s ease}.class-card.selected .class-description{color:#ffffffe6}.check-mark{color:#48bb78;flex-shrink:0}.class-card.selected .check-mark{color:#fff}.message{align-items:center;border-left:4px solid;gap:12px;margin-bottom:20px}.message.error{background:#fed7d7;border-left-color:#f56565;color:#c53030}.loading-state{padding:20px;text-align:center}.loading-state .spinner{border:3px solid #e2e8f0;border-top-color:#667eea;margin:0 auto 16px}.loading-state p{color:#718096}.note{border-top:1px solid #e2e8f0;padding-top:20px;text-align:center}.note p{color:#718096;font-size:.9rem;font-style:italic}@media (max-width:768px){.class-selection-card{padding:24px}.selection-header h1{font-size:2rem}.selection-header p{font-size:1rem}.classes-grid{grid-template-columns:1fr}.class-content{gap:12px}.class-icon{height:50px;width:50px}.class-icon svg{font-size:1.25rem}}.notice-carousel{background:#fff;border-radius:12px;box-shadow:0 4px 12px #00000014;margin:20px 0;overflow:hidden;padding:20px;position:relative}.notice-header{border-bottom:1px solid #e3e6f0;justify-content:space-between;margin-bottom:20px;padding-bottom:15px}.notice-header h4{color:#2d3748;font-size:18px;font-weight:600;margin:0}.carousel-controls{display:flex;gap:8px}.carousel-btn{align-items:center;background:#fff;border:1px solid #e3e6f0;border-radius:50%;color:#4a5568;cursor:pointer;display:flex;font-size:16px;height:36px;justify-content:center;transition:all .2s ease;width:36px}.carousel-btn:hover:not(:disabled){background:#f7fafc;border-color:#cbd5e0;box-shadow:0 2px 4px #0000001a;transform:translateY(-1px)}.carousel-btn:disabled{cursor:not-allowed;opacity:.5}.notice-scroller{background:#f8f9fc;border-radius:8px;height:150px;position:relative;touch-action:pan-y;-webkit-user-select:none;user-select:none;width:100%}.notice-track{display:flex;height:100%}.notice-slide{box-sizing:border-box;flex:0 0 100%;height:100%;padding:12px}.notice-card{background:#fff;border-radius:8px;box-shadow:0 2px 8px #0000000f;display:flex;flex-direction:column;height:100%;justify-content:center;padding:20px}.swipe-hint{align-items:center;animation:fadeInOut 3s infinite;-webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px);background:#000000b3;border-radius:20px;bottom:10px;color:#fff;display:flex;font-size:12px;gap:6px;left:50%;padding:6px 12px;position:absolute;transform:translateX(-50%)}@keyframes fadeInOut{0%,to{opacity:.5}50%{opacity:1}}.swipe-icon{font-size:14px}.swipe-text{font-weight:500}.notice-dots{display:flex;gap:8px;justify-content:center;margin-top:20px}.notice-dot{background:#e2e8f0;border:none;border-radius:50%;cursor:pointer;height:10px;padding:0;transition:all .3s ease;width:10px}.notice-dot:hover{background:#cbd5e0;transform:scale(1.2)}.notice-dot.active{background:#4e73df;border-radius:5px;width:30px}.carousel-progress{background:#e2e8f0;border-radius:2px;height:3px;margin-top:15px;overflow:hidden}.progress-bar{background:linear-gradient(90deg,#4e73df,#2e59d9);height:100%;transition:width .5s ease}@media (max-width:768px){.notice-carousel{margin:15px 0;padding:15px}.notice-scroller{height:130px}.notice-card{padding:15px}.carousel-controls,.swipe-hint{display:none}}.carousel-btn:focus,.notice-dot:focus{outline:2px solid #4e73df;outline-offset:2px}@media (prefers-reduced-motion:reduce){.notice-track,.progress-bar{transition:none}.swipe-hint{animation:none}}:root{--primary:#4f46e5;--primary-dark:#4338ca;--secondary:#10b981;--accent:#f59e0b;--danger:#ef4444;--success:#10b981;--warning:#f59e0b;--info:#3b82f6;--bg-primary:#fff;--bg-secondary:#f8fafc;--bg-sidebar:#1e293b;--bg-sidebar-light:#334155;--text-primary:#0f172a;--text-secondary:#64748b;--text-light:#94a3b8;--text-on-dark:#f1f5f9;--border-color:#e2e8f0;--shadow-sm:0 1px 3px #0000001a;--shadow-md:0 4px 6px -1px #0000001a;--shadow-lg:0 10px 15px -3px #0000001a;--shadow-xl:0 20px 25px -5px #0000001a;--radius-sm:0.375rem;--radius-md:0.5rem;--radius-lg:0.75rem;--radius-xl:1rem;--transition-fast:150ms cubic-bezier(0.4,0,0.2,1);--transition-normal:250ms cubic-bezier(0.4,0,0.2,1);--transition-slow:350ms cubic-bezier(0.4,0,0.2,1)}.dashboard-container{background-color:#f8fafc;background-color:var(--bg-secondary);display:flex;font-family:Inter,-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif;min-height:100vh}.sidebar.modern{background:#1e293b;background:var(--bg-sidebar);color:#f1f5f9;color:var(--text-on-dark);display:flex;flex-direction:column;height:100vh;left:0;overflow:hidden;position:fixed;top:0;transition:all .25s cubic-bezier(.4,0,.2,1);transition:all var(--transition-normal);z-index:1000}.sidebar.modern.open{box-shadow:0 20px 25px -5px #0000001a;box-shadow:var(--shadow-xl);width:280px}.sidebar.modern.closed{width:80px}.sidebar-header{border-bottom:1px solid #ffffff1a;justify-content:space-between;padding:1.5rem}.logo,.sidebar-header{align-items:center;display:flex}.logo{color:#fff;font-size:1.5rem;font-weight:700;gap:.75rem}.logo-icon{color:#4f46e5;color:var(--primary);font-size:2rem}.sidebar-toggle{align-items:center;background:#ffffff1a;border:none;border-radius:.5rem;border-radius:var(--radius-md);color:#fff;cursor:pointer;display:flex;height:36px;justify-content:center;transition:all .15s cubic-bezier(.4,0,.2,1);transition:all var(--transition-fast);width:36px}.sidebar-toggle:hover{background:#fff3}.sidebar-profile{align-items:center;border-bottom:1px solid #ffffff1a;display:flex;gap:1rem;padding:1.5rem}.profile-avatar{flex-shrink:0;position:relative}.profile-avatar img{object-fit:cover}.avatar-initials,.profile-avatar img{border-radius:50%;height:48px;width:48px}.avatar-initials{align-items:center;background:linear-gradient(135deg,#4f46e5,#3b82f6);background:linear-gradient(135deg,var(--primary),var(--info));color:#fff;display:flex;font-size:1.125rem;font-weight:600;justify-content:center}.status-indicator{border:2px solid #1e293b;border:2px solid var(--bg-sidebar);border-radius:50%;bottom:0;height:12px;position:absolute;right:0;width:12px}.status-indicator.online{background:#10b981;background:var(--success)}.profile-info{flex:1 1;min-width:0}.profile-name{font-size:1rem;font-weight:600;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.profile-role{align-items:center;color:#94a3b8;color:var(--text-light);display:flex;font-size:.875rem;gap:.25rem;margin-top:.25rem}.premium-badge{color:#f59e0b;color:var(--accent);font-size:.875rem}.profile-class{color:#94a3b8;color:var(--text-light);font-size:.875rem;margin-top:.125rem}.sidebar-nav{flex:1 1;overflow-y:auto;padding:1rem 0}.nav-section{margin-bottom:1.5rem}.section-label{font-size:.75rem;letter-spacing:.05em;margin-bottom:.5rem;padding:0 1.5rem;text-transform:uppercase}.nav-item,.section-label{color:#94a3b8;color:var(--text-light)}.nav-item{align-items:center;cursor:pointer;display:flex;gap:1rem;padding:.75rem 1.5rem;position:relative;text-decoration:none;transition:all .15s cubic-bezier(.4,0,.2,1);transition:all var(--transition-fast)}.nav-item:hover{background:#ffffff0d;color:#fff}.nav-item.active{background:#4f46e533;border-left:3px solid #4f46e5;border-left:3px solid var(--primary);color:#fff}.nav-icon{flex-shrink:0;font-size:1.25rem}.nav-text{white-space:nowrap}.nav-badge{background:#ef4444;background:var(--danger);border-radius:9999px;color:#fff;font-size:.75rem;margin-left:auto;min-width:1.5rem;padding:.125rem .5rem;text-align:center}.sidebar-footer{border-top:1px solid #ffffff1a;padding:1.5rem}.logout-btn{align-items:center;background:#ef44441a;border:none;border-radius:.5rem;border-radius:var(--radius-md);color:#ef4444;color:var(--danger);cursor:pointer;display:flex;font-weight:500;gap:.75rem;justify-content:center;padding:.75rem;transition:all .15s cubic-bezier(.4,0,.2,1);transition:all var(--transition-fast);width:100%}.logout-btn:hover{background:#ef444433}.main-content{flex:1 1;margin-left:280px;transition:margin-left .25s cubic-bezier(.4,0,.2,1);transition:margin-left var(--transition-normal)}.sidebar.modern.closed~.main-content{margin-left:80px}.top-bar{background:#fff;background:var(--bg-primary);border-bottom:1px solid #e2e8f0;border-bottom:1px solid var(--border-color);box-shadow:0 1px 3px #0000001a;box-shadow:var(--shadow-sm);justify-content:space-between;padding:1rem 2rem;position:-webkit-sticky;position:sticky;top:0;z-index:50}.top-bar,.top-left{align-items:center;display:flex}.top-left{gap:1rem}.menu-toggle-btn{background:none;border:none;border-radius:.375rem;border-radius:var(--radius-sm);color:#64748b;color:var(--text-secondary);cursor:pointer;display:none;font-size:1.25rem;padding:.5rem;transition:all .15s cubic-bezier(.4,0,.2,1);transition:all var(--transition-fast)}.menu-toggle-btn:hover{background:#f8fafc;background:var(--bg-secondary)}.menu-toggle-btn:hover,.page-title{color:#0f172a;color:var(--text-primary)}.page-title{font-size:1.5rem;font-weight:600}.top-right{align-items:center;display:flex;gap:1.5rem}.notification-bubble{color:#64748b;color:var(--text-secondary);cursor:pointer;padding:.5rem;position:relative}.notification-bubble .badge{background:#ef4444;background:var(--danger);border-radius:9999px;color:#fff;font-size:.75rem;min-width:1.25rem;padding:.125rem .375rem;position:absolute;right:-4px;text-align:center;top:-4px}.date-display{align-items:center;color:#64748b;color:var(--text-secondary);display:flex;font-size:.875rem;gap:.5rem}.content-area{padding:2rem}.dashboard-home{max-width:1400px}.welcome-banner{align-items:center;background:linear-gradient(135deg,#4f46e5,#334155);background:linear-gradient(135deg,var(--primary),#334155);border-radius:1rem;border-radius:var(--radius-xl);box-shadow:0 10px 15px -3px #0000001a;box-shadow:var(--shadow-lg);color:#fff;display:flex;gap:2rem;justify-content:space-between;margin-bottom:2rem;padding:2.5rem}.welcome-content h1{font-size:2rem;font-weight:700;margin-bottom:.5rem}.welcome-content p{font-size:1.125rem;opacity:.9}.welcome-actions{display:flex;gap:1rem}.btn-primary{background:#fff;color:#4f46e5;color:var(--primary)}.btn-primary:hover{box-shadow:0 10px 15px -3px #0000001a;box-shadow:var(--shadow-lg)}.btn-secondary{-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);background:#fff3;color:#fff}.btn-secondary:hover{background:#ffffff4d}.compact-stats-grid{grid-gap:.75rem;display:grid;gap:.75rem;grid-template-columns:repeat(6,1fr);margin-bottom:1rem}.stat-card{background:var(--bg-primary);border:1px solid #e2e8f0;border:1px solid var(--border-color);border-radius:.75rem;border-radius:var(--radius-lg);box-shadow:0 4px 6px -1px #0000001a;box-shadow:var(--shadow-md);gap:1.25rem;padding:1.5rem;transition:all .25s cubic-bezier(.4,0,.2,1);transition:all var(--transition-normal)}.stat-card.compact{gap:.75rem;min-height:56px;padding:.8rem}.stat-card:hover{box-shadow:0 10px 15px -3px #0000001a;box-shadow:var(--shadow-lg);transform:translateY(-4px)}.stat-card.clickable{cursor:pointer}.stat-icon{border-radius:.75rem;border-radius:var(--radius-lg);flex-shrink:0;font-size:1.5rem;height:56px;width:56px}.stat-card.compact .stat-icon{font-size:1.125rem;height:40px;width:40px}.stat-card.blue .stat-icon{background:#3b82f61a;color:#3b82f6;color:var(--info)}.stat-card.green .stat-icon{background:#10b9811a;color:#10b981;color:var(--success)}.stat-card.purple .stat-icon{background:#8b5cf61a;color:#8b5cf6}.stat-card.orange .stat-icon{background:#f59e0b1a;color:#f59e0b;color:var(--warning)}.stat-card.red .stat-icon{background:#ef44441a;color:#ef4444;color:var(--danger)}.stat-card.teal .stat-icon{background:#14b8a61a;color:#14b8a6}.stat-content{flex:1 1}.stat-value{color:#0f172a;color:var(--text-primary);font-size:1.875rem;font-weight:700;line-height:1;margin-bottom:.25rem}.stat-card.compact .stat-value{font-size:1.25rem;font-weight:700}.stat-title{color:#64748b;color:var(--text-secondary);font-size:.875rem;font-weight:500;margin-bottom:.125rem}.stat-subtitle{color:#94a3b8;color:var(--text-light)}.stat-card.compact .stat-title,.stat-subtitle{font-size:.75rem}.stat-card.compact .stat-subtitle{font-size:.65rem;margin-bottom:1.5rem}.quick-actions-grid{margin-bottom:2rem}.actions-container{grid-gap:.5rem;align-items:stretch;display:grid;gap:.5rem;grid-template-columns:repeat(4,minmax(0,1fr))}.quick-action-card{align-items:center;background:#fff;background:var(--bg-primary);border:1px solid #e2e8f0;border:1px solid var(--border-color);border-radius:.75rem;border-radius:var(--radius-lg);box-shadow:0 4px 6px -1px #0000001a;box-shadow:var(--shadow-md);display:flex;gap:.6rem;padding:.9rem;position:relative;transition:all .25s cubic-bezier(.4,0,.2,1);transition:all var(--transition-normal)}.quick-action-card:hover{box-shadow:0 10px 15px -3px #0000001a;box-shadow:var(--shadow-lg);transform:translateX(4px)}.quick-action-card.clickable{cursor:pointer}.action-icon{align-items:center;border-radius:.75rem;border-radius:var(--radius-lg);display:flex;flex-shrink:0;font-size:1rem;height:40px;justify-content:center;width:40px}.quick-action-card.primary .action-icon{background:#4f46e51a;color:#4f46e5;color:var(--primary)}.quick-action-card.success .action-icon{background:#10b9811a;color:#10b981;color:var(--success)}.quick-action-card.info .action-icon{background:#3b82f61a;color:#3b82f6;color:var(--info)}.quick-action-card.warning .action-icon{background:#f59e0b1a;color:#f59e0b;color:var(--warning)}.action-content{flex:1 1}.action-title{color:#0f172a;color:var(--text-primary);font-size:.95rem;font-weight:600;margin-bottom:.125rem}.action-subtitle{color:#64748b;color:var(--text-secondary);font-size:.8rem}.action-badge{background:#f59e0b;background:var(--accent);border-radius:9999px;color:#fff;font-size:.7rem;font-weight:600;padding:.2rem .5rem;position:absolute;right:.6rem;top:.6rem}.action-arrow{color:#94a3b8;color:var(--text-light);font-size:.8rem}.recent-activity.compact{background:#fff;background:var(--bg-primary);border:1px solid #e2e8f0;border:1px solid var(--border-color);border-radius:.75rem;border-radius:var(--radius-lg);box-shadow:0 4px 6px -1px #0000001a;box-shadow:var(--shadow-md);padding:1.5rem}.activity-list{display:flex;flex-direction:column;gap:1rem}.activity-item{align-items:flex-start;border-radius:.5rem;border-radius:var(--radius-md);display:flex;gap:1rem;padding:1rem;transition:all .15s cubic-bezier(.4,0,.2,1);transition:all var(--transition-fast)}.activity-item:hover{background:#f8fafc;background:var(--bg-secondary)}.activity-icon{align-items:center;border-radius:.5rem;border-radius:var(--radius-md);display:flex;flex-shrink:0;font-size:1rem;height:40px;justify-content:center;width:40px}.activity-item:first-child .activity-icon{background:#10b9811a;color:#10b981;color:var(--success)}.activity-item:nth-child(2) .activity-icon{background:#f59e0b1a;color:#f59e0b;color:var(--warning)}.activity-item:nth-child(3) .activity-icon{background:#3b82f61a;color:#3b82f6;color:var(--info)}.activity-content{flex:1 1}.activity-title{color:#0f172a;color:var(--text-primary);font-weight:500;margin-bottom:.25rem}.activity-time{color:#64748b;color:var(--text-secondary);font-size:.875rem}.dashboard-chat-bubble{bottom:2rem;position:fixed;right:2rem;z-index:1000}.bubble-icon{align-items:center;background:#4f46e5;background:var(--primary);border-radius:50%;box-shadow:0 20px 25px -5px #0000001a;box-shadow:var(--shadow-xl);color:#fff;cursor:pointer;display:flex;font-size:1.5rem;height:60px;justify-content:center;position:relative;transition:all .25s cubic-bezier(.4,0,.2,1);transition:all var(--transition-normal);width:60px}.bubble-icon:hover{background:#4338ca;background:var(--primary-dark);transform:scale(1.1)}.bubble-notification-badge{background:#ef4444;background:var(--danger);border-radius:9999px;color:#fff;font-size:.75rem;font-weight:600;min-width:1.5rem;padding:.25rem .5rem;position:absolute;right:-4px;text-align:center;top:-4px}.chat-window{background:#fff;background:var(--bg-primary);border:1px solid #e2e8f0;border:1px solid var(--border-color);border-radius:1rem;border-radius:var(--radius-xl);box-shadow:var(--shadow-2xl);display:flex;flex-direction:column;height:600px;overflow:hidden;width:380px}.chat-header{background:#4f46e5;background:var(--primary);color:#fff;justify-content:space-between;padding:1.25rem 1.5rem}.chat-header h3{font-size:1.125rem;font-weight:600}.close-chat{background:none;border:none;border-radius:.375rem;border-radius:var(--radius-sm);color:#fff;cursor:pointer;font-size:1.25rem;padding:.25rem;transition:all .15s cubic-bezier(.4,0,.2,1);transition:all var(--transition-fast)}.close-chat:hover{background:#ffffff1a}.chat-messages{background:#f8fafc;background:var(--bg-secondary);padding:1.5rem}.message-date-group{margin-bottom:1.5rem}.date-divider{margin:1rem 0}.date-divider span{background:#f8fafc;background:var(--bg-secondary);border-radius:9999px;color:#64748b;color:var(--text-secondary);display:inline-block;font-size:.75rem;padding:.5rem 1rem}.message{margin-bottom:1rem}.message-content{border-radius:.75rem;border-radius:var(--radius-lg);max-width:80%;padding:.75rem 1rem}.message.sent .message-content{background:#4f46e5;background:var(--primary);border-bottom-right-radius:.25rem}.message.received .message-content{background:#fff;background:var(--bg-primary);border-bottom-left-radius:.25rem;box-shadow:0 1px 3px #0000001a;box-shadow:var(--shadow-sm);color:#0f172a;color:var(--text-primary)}.message-text{margin-bottom:.25rem}.message-time{font-size:.75rem;opacity:.7}.chat-input{border-top:1px solid #e2e8f0;border-top:1px solid var(--border-color);display:flex;gap:.75rem;padding:1.25rem}.chat-input input{border:1px solid #e2e8f0;border:1px solid var(--border-color);border-radius:.75rem;border-radius:var(--radius-lg);flex:1 1;font-size:.875rem;padding:.75rem 1rem;transition:all .15s cubic-bezier(.4,0,.2,1);transition:all var(--transition-fast)}.chat-input input:focus{border-color:#4f46e5;border-color:var(--primary);box-shadow:0 0 0 3px #4f46e51a;outline:none}.send-button{background:#4f46e5;background:var(--primary);border-radius:.75rem;border-radius:var(--radius-lg);font-weight:600;padding:.75rem 1.5rem;transition:all .15s cubic-bezier(.4,0,.2,1);transition:all var(--transition-fast)}.send-button:hover:not(:disabled){background:#4338ca;background:var(--primary-dark)}.send-button:disabled{opacity:.5}@media (max-width:1024px){.sidebar.modern.open{width:240px}.main-content{margin-left:240px}.sidebar.modern.closed~.main-content{margin-left:80px}.welcome-banner{flex-direction:column;text-align:center}.welcome-actions{justify-content:center}}@media (max-width:768px){.sidebar.modern{transform:translateX(-100%)}.sidebar.modern.open{transform:translateX(0);width:280px}.main-content{margin-left:0!important}.menu-toggle-btn{display:block}.content-area,.top-bar{padding:1rem}.actions-container,.compact-stats-grid{grid-template-columns:1fr}.chat-window{bottom:5rem;height:500px;right:1rem;width:calc(100vw - 2rem)}.dashboard-chat-bubble{bottom:1rem;right:1rem}}@media (max-width:480px){.welcome-banner{padding:1.5rem}.welcome-content h1{font-size:1.5rem}.welcome-actions{flex-direction:column;width:100%}.btn-primary,.btn-secondary{width:100%}}@keyframes slideIn{0%{opacity:0;transform:translateY(20px)}to{opacity:1;transform:translateY(0)}}.dashboard-home>*{animation:slideIn .5s ease-out}::-webkit-scrollbar{height:8px;width:8px}::-webkit-scrollbar-track{background:#f8fafc;background:var(--bg-secondary);border-radius:4px}::-webkit-scrollbar-thumb{background:#94a3b8;background:var(--text-light);border-radius:4px}::-webkit-scrollbar-thumb:hover{background:#64748b;background:var(--text-secondary)}.sidebar-nav::-webkit-scrollbar{width:4px}.sidebar-nav::-webkit-scrollbar-thumb{background:#fff3}.activity-item,.quick-action-card,.stat-card{animation:pulse 2s cubic-bezier(.4,0,.6,1) infinite}.empty-state{color:#64748b;color:var(--text-secondary);padding:3rem}.empty-state-icon{font-size:3rem;margin-bottom:1rem;opacity:.5}.dashboard-home{margin:0 auto;max-width:1200px;padding:20px}.dashboard-header{margin-bottom:30px;text-align:center}.dashboard-header h1{color:#333;margin-bottom:10px}.dashboard-header p{color:#666;font-size:18px}.quiz-history-section,.unfinished-quizzes-section{margin-bottom:40px}.quiz-history-section h2,.unfinished-quizzes-section h2{align-items:center;color:#333;display:flex;font-size:24px;margin-bottom:20px}.section-icon{color:#4caf50;margin-right:10px}.loading,.no-history{background-color:#f9f9f9;border-radius:8px;color:#666;padding:30px;text-align:center}.history-grid,.unfinished-grid{grid-gap:20px;display:grid;gap:20px;grid-template-columns:repeat(auto-fill,minmax(300px,1fr))}.quiz-card,.unfinished-quiz-card{background-color:#fff;border-radius:8px;box-shadow:0 2px 10px #0000001a;padding:20px;transition:transform .2s,box-shadow .2s}.quiz-card:hover,.unfinished-quiz-card:hover{box-shadow:0 5px 15px #00000026;transform:translateY(-5px)}.unfinished-quiz-card{border-left:4px solid #ff9800}.quiz-header{justify-content:space-between;margin-bottom:15px}.quiz-header,.quiz-subject{align-items:center;display:flex}.quiz-subject{color:#333;font-weight:700}.subject-icon{color:#4caf50;margin-right:8px}.quiz-type,.quiz-year{background-color:#f0f0f0;border-radius:4px;font-size:14px;font-weight:700;padding:4px 8px}.quiz-info{margin-bottom:15px}.progress-info{color:#ff9800;font-weight:700;margin:8px 0}.quiz-date{color:#888;font-size:14px}.quiz-result{align-items:center;background-color:#f9f9f9;border-radius:6px;display:flex;justify-content:space-between;margin-bottom:15px;padding:10px}.result-score{color:#333;font-size:24px;font-weight:700}.result-percentage{color:#4caf50;font-size:18px;font-weight:700}.quiz-actions{display:flex;gap:10px}.continue-btn,.remove-btn{border:none;border-radius:4px;cursor:pointer;font-weight:700;padding:8px 16px;transition:background-color .2s}.continue-btn{background-color:#4caf50;color:#fff}.continue-btn:hover{background-color:#3e8e41}.remove-btn{background-color:#f0f0f0;color:#666}.remove-btn:hover{background-color:#ddd}@media (max-width:768px){.dashboard-home{padding:10px}.history-grid,.unfinished-grid{grid-template-columns:1fr}.quiz-actions{flex-direction:column}.continue-btn,.remove-btn{width:100%}}.subjects-page{background:#f8f9fc;min-height:100vh}.subjects-header{margin-bottom:25px}.filter-btn{align-items:center;background:#fff3;border:none;border-radius:50%;color:#fff;cursor:pointer;display:flex;height:44px;justify-content:center;transition:all .3s ease;width:44px}.filter-btn:hover{background:#ffffff4d;transform:scale(1.1)}.search-container{background:#ffffff26;border:1px solid #0000;border-radius:15px;height:45px;padding:0 15px;transition:all .3s ease}.search-container.focused{background:#ffffff40;border-color:#ffffff80}.search-icon{color:#fff;font-size:18px;margin-right:10px}.search-input{color:#fff;flex:1 1;font-size:16px;padding:10px 0}.search-input::placeholder{color:#ffffffb3}.clear-search{align-items:center;background:#0000;border:none;color:#fff;cursor:pointer;display:flex;justify-content:center;padding:5px;transition:transform .2s}.clear-search:hover{transform:scale(1.1)}.subjects-container{padding:20px 0 40px}.subjects-grid{grid-gap:15px;display:grid;gap:15px;grid-auto-rows:auto;grid-template-columns:repeat(4,1fr)}@media (max-width:1024px){.subjects-grid{grid-template-columns:repeat(2,1fr)}}.subject-card{border:2px solid #0000;border-radius:15px;box-shadow:0 4px 15px #00000014;cursor:pointer;overflow:hidden;transition:all .3s ease}.subject-card:hover{border-color:#667eea;box-shadow:0 15px 30px #0000001a;transform:translateY(-3px)}.card-content{padding:15px}.icon-container{align-items:center;background:#e2e8f0;border-radius:12px;color:#667eea;display:flex;font-size:20px;height:40px;justify-content:center;margin-right:12px;width:40px}.subject-name{font-size:16px;line-height:1.4}.quiz-count{color:#718096;font-size:13px;font-weight:400}.quiz-type-row{align-items:center;border-top:1px solid #e2e8f0;display:flex;padding-top:12px}.quiz-type-label{color:#718096;font-size:13px;font-weight:500;margin-right:6px}.quiz-type-value{color:#667eea;flex:1 1;font-size:13px;font-weight:600}.chevron{color:#718096;font-size:16px;opacity:.7}.empty-state{background:#fff;border-radius:16px;box-shadow:0 10px 15px -3px #00000014;margin:40px auto;max-width:500px;padding:60px 30px}.empty-state h3{color:#2d3748;font-size:24px;margin-bottom:15px;margin-top:0}.empty-state p{color:#718096;font-size:16px;margin-bottom:15px}.clear-btn{background:#667eea;border:none;border-radius:20px;color:#fff;cursor:pointer;font-size:14px;font-weight:500;padding:10px 20px;transition:all .3s ease}.clear-btn:hover{background:#5a67d8;box-shadow:0 5px 15px #667eea4d;transform:translateY(-2px)}.modal-content{max-width:400px;padding:20px;text-align:center;width:100%}.modal-title{margin:0 0 20px}.modal-close-btn{background:#667eea;border:none;border-radius:10px;color:#fff;cursor:pointer;font-size:16px;font-weight:500;padding:10px 20px;transition:all .3s ease}.modal-close-btn:hover{background:#5a67d8}@media (max-width:768px){.subjects-grid{grid-template-columns:1fr}.header-main{gap:15px}.header-text-content h1{font-size:24px;margin-bottom:10px}.header-badges{justify-content:center}.search-container{height:40px}.search-input{font-size:14px}.modal-content{width:90%}}@media (max-width:480px){.header-gradient{border-bottom-left-radius:20px;border-bottom-right-radius:20px;padding:20px 15px}.header-text-content h1{font-size:22px}.header-badge{font-size:12px;padding:6px 12px}.page-content{padding:0 15px}.subject-card{border-radius:12px}.card-content{padding:12px}.subject-name{font-size:14px}.quiz-count,.quiz-type-label,.quiz-type-value{font-size:12px}}.subject-page{margin:0 auto;max-width:800px;padding:20px}.subject-header{border-bottom:1px solid #e0e0e0;margin-bottom:30px;padding-bottom:20px}.back-btn{background:none;border-radius:4px;color:#3498db;font-size:16px;gap:5px;margin-bottom:15px;padding:5px 10px;transition:background-color .2s}.back-btn:hover{background-color:#f5f5f5}.subject-header h1{color:#2c3e50;margin:0 0 5px}.subtitle{color:#7f8c8d;font-style:italic;margin:0}.year-selection-container{background-color:#fff;border-radius:8px;box-shadow:0 2px 10px #0000001a;padding:25px}.year-selection-container h2{color:#2c3e50;margin-bottom:20px;margin-top:0}.year-selector{margin-bottom:20px}.year-selector label{color:#34495e;display:block;font-weight:600;margin-bottom:8px}.year-selector select{background-color:#fff;border:1px solid #ddd;border-radius:4px;font-size:16px;padding:10px 15px;width:100%}.load-questions-btn{background-color:#3498db;border:none;border-radius:4px;color:#fff;cursor:pointer;font-size:16px;margin-bottom:20px;padding:12px 20px;transition:background-color .2s;width:100%}.load-questions-btn:hover:not(:disabled){background-color:#2980b9}.load-questions-btn:disabled{background-color:#bdc3c7;cursor:not-allowed}.questions-info{background-color:#f9f9f9;border-left:4px solid #3498db;border-radius:4px;padding:15px}.questions-info p{color:#7f8c8d;margin:0}.no-years-available{padding:40px 20px;text-align:center}.no-data-icon{color:#bdc3c7;font-size:48px;margin-bottom:15px}.no-years-available h3{color:#7f8c8d;margin-bottom:10px}.no-years-available p{color:#95a5a6;margin-bottom:20px}.spinner{color:#3498db;font-size:36px;margin-bottom:15px}.error-container{color:#e74c3c;padding:60px 20px;text-align:center}.back-button{background-color:#3498db;border-radius:4px;gap:5px;margin-top:15px;padding:10px 20px}.back-button:hover{background-color:#2980b9}.katex-renderer{color:#0f172a;color:var(--text-color,#0f172a);font-size:1rem;line-height:1.45}.katex-renderer .katex{display:inline-block;vertical-align:middle}@media (max-width:640px){.katex-renderer{font-size:.95rem}}*{box-sizing:border-box;margin:0;padding:0}body{-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Oxygen,Ubuntu,Cantarell,Fira Sans,Droid Sans,Helvetica Neue,sans-serif}.quiz-page{background-color:#f8f9fc;margin:0 auto;max-width:1200px;min-height:100vh;padding:16px}.quiz-header{background:linear-gradient(135deg,#667eea,#764ba2);border-radius:16px;box-shadow:0 4px 12px #0000001a;color:#fff;margin-bottom:20px;padding:16px}.header-top-row{margin-bottom:12px}.header-bottom-row,.header-top-row{align-items:center;display:flex;flex-wrap:wrap;gap:10px;justify-content:space-between}.back-button,.skip-button{align-items:center;background:#fff3;border:none;border-radius:12px;color:#fff;cursor:pointer;display:flex;font-size:14px;font-weight:500;gap:6px;padding:8px 16px;transition:all .2s ease}.back-button:hover,.skip-button:hover{background:#ffffff4d;transform:translateY(-1px)}.skip-button{border:1px solid #ffffff4d}.quiz-info{flex:1 1;text-align:center}.quiz-type{color:#fffffff2;font-size:16px;font-weight:600;letter-spacing:.3px}.subject-container{align-items:center;display:flex;flex:1 1;gap:8px}.subject-icon{font-size:16px;opacity:.9}.subject{color:#fffffff2;font-size:15px;font-weight:500;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.progress-container{align-items:center;background:#ffffff1a;border-radius:12px;display:flex;gap:6px;justify-content:center;min-width:100px;padding:6px 12px}.progress-icon{font-size:14px;opacity:.9}.page{color:#fff;font-size:14px;font-weight:600}.attempt-counter{background:linear-gradient(135deg,#fff3cd,#ffeaa7);border-left:4px solid #ffc107;border-radius:12px;box-shadow:0 2px 8px #00000014;color:#856404;margin:16px 0;padding:16px}.attempt-counter-content{display:flex;flex-direction:column;gap:10px}.attempt-icon{font-size:24px;margin-right:10px;vertical-align:middle}.attempt-counter p{display:inline-block;font-size:15px;font-weight:700;margin:0;vertical-align:middle}.contact-info{background-color:#ffffff4d;border:1px solid #ffc10733;margin-top:10px;padding:12px}.contact-item{font-size:14px;margin:6px 0}.contact-item strong{color:#664d03}.chat-link,.whatsapp-link{color:#007bff;cursor:pointer;text-decoration:underline;transition:color .2s}.chat-link:hover,.whatsapp-link:hover{color:#0056b3;text-decoration:none}.review-notice{align-items:center;background-color:#f8f9fa;border-left:4px solid #4e73df;border-radius:8px;display:flex;flex-wrap:wrap;gap:10px;justify-content:space-between;margin:16px 0;padding:16px}.review-notice p{color:#333;flex:1 1;font-size:14px;margin:0}.correct-example{color:#28a745;font-weight:700}.incorrect-example{color:#dc3545;font-weight:700}.back-to-results-btn{background-color:#6c757d;border:none;border-radius:6px;color:#fff;cursor:pointer;font-size:14px;font-weight:500;padding:8px 16px;transition:background-color .2s}.back-to-results-btn:hover{background-color:#5a6268}.questions-container{margin-bottom:30px}.question-card{background:#fff;border-left:4px solid #4e73df;border-radius:12px;box-shadow:0 2px 8px #00000014;margin-bottom:20px;padding:20px;transition:transform .2s ease,box-shadow .2s ease}.question-card:hover{box-shadow:0 4px 12px #0000001f;transform:translateY(-2px)}.question-card.mc{border-left-color:#4e73df}.question-card.theory{border-left-color:#1cc88a}.question-header{align-items:center;border-bottom:1px solid #e3e6f0;display:flex;justify-content:space-between;margin-bottom:16px;padding-bottom:12px}.question-number{color:#4e73df;font-size:18px;font-weight:700}.answer-status{font-size:14px;font-weight:700;margin-left:12px}.answer-status.correct{color:#28a745}.answer-status.incorrect{color:#dc3545}.mc-header{background-color:#f8f9fa;border-left:3px solid #4e73df;border-radius:8px;color:#495057;font-size:14px;line-height:1.5;margin-bottom:16px;padding:12px 16px}.question-content{padding:0 4px}.question-image-container{align-items:center;border-radius:8px;cursor:zoom-in;display:flex;justify-content:center;margin:20px 0;overflow:hidden;position:relative;transition:transform .2s ease;width:100%}.question-image-container:hover{transform:scale(1.01)}.question-image{border:1px solid #dee2e6;border-radius:8px;box-shadow:0 2px 8px #0000000a;height:auto;max-width:700px;object-fit:contain;width:100%}.image-overlay{align-items:center;-webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px);background:#000000b3;border-radius:20px;bottom:16px;color:#fff;display:flex;font-size:13px;font-weight:500;gap:6px;padding:8px 16px;position:absolute;right:16px}.image-overlay:before{content:"🔍";font-size:14px}.item-image-container{cursor:zoom-in;margin:16px 0;text-align:center}.item-image{border:1px solid #dee2e6;border-radius:6px;box-shadow:0 1px 4px #0000000d;height:auto;max-height:300px;max-width:100%;object-fit:contain}.question-text-container{margin:20px 0}.question-text{word-wrap:break-word;background-color:#eef3f6;border:1px solid #cde8f3;border-radius:8px;box-shadow:0 2px 8px #0000000f;color:#040404;font-size:16px;line-height:1.6;margin:0 auto 20px;max-width:100%;overflow-wrap:break-word;padding:16px 20px;white-space:normal}.options{flex-direction:column;margin-top:20px}.option,.options{display:flex;gap:12px}.option{align-items:flex-start;border:2px solid #e3e6f0;border-radius:10px;cursor:pointer;min-height:60px;padding:16px 20px;transition:all .2s ease}.option:hover{background-color:#f8f9fa;border-color:#adb5bd;transform:translateX(4px)}.option.selected{background-color:#e8f4ff;border-color:#007bff;box-shadow:0 2px 8px #007bff26}.option.correct{background-color:#d4edda;border-color:#28a745;color:#155724}.option.incorrect{background-color:#f8d7da;border-color:#dc3545;color:#721c24}.option.correct,.option.incorrect{cursor:default}.option.correct:hover,.option.incorrect:hover{transform:none}.option-letter{color:#007bff;font-size:16px;font-weight:700;margin-top:2px;min-width:24px}.correct-indicator,.incorrect-indicator{align-items:center;display:flex;font-size:14px;font-weight:700;gap:4px;margin-left:12px}.correct-indicator{color:#28a745}.incorrect-indicator{color:#e74c3c}.theory-items{margin-top:20px}.theory-item-block{border-bottom:1px solid #e3e6f0;margin-bottom:24px;padding-bottom:24px}.theory-item-block:last-child{border-bottom:none;margin-bottom:0;padding-bottom:0}.theory-item-question{font-size:16px;line-height:1.6;margin-bottom:20px}.show-answer-btn{align-items:center;background-color:#4caf50;border:none;border-radius:6px;color:#fff;cursor:pointer;display:inline-flex;font-size:14px;font-weight:600;gap:8px;margin-bottom:16px;padding:12px 24px;transition:all .2s ease}.show-answer-btn:hover{background-color:#3e8e41;box-shadow:0 2px 8px #3cb3714d;transform:translateY(-1px)}.show-answer-btn:before{content:"📖";font-size:16px}.theory-answer-container{margin-top:20px}.theory-answer{background-color:#f8f9fc;border-left:4px solid #4e73df;border-radius:8px;box-shadow:0 1px 4px #0000000d;font-size:15px;line-height:1.6;margin-top:16px;padding:20px}.theory-answer h4{color:#2e7d32;font-size:16px;font-weight:600;margin-bottom:12px;margin-top:0}.learning-notice{background-color:#e3f2fd;border-left:4px solid #2196f3;border-radius:8px;font-style:italic;margin-bottom:24px;padding:16px}.learning-notice p{color:#31708f;font-size:14px;line-height:1.5;margin:0;text-align:center}.quiz-navigation{border-top:1px solid #e3e6f0;flex-wrap:wrap;gap:16px;justify-content:space-between;margin-top:30px;padding:20px 0}.nav-btn,.quiz-navigation{align-items:center;display:flex}.nav-btn{background-color:#4e73df;border:none;border-radius:8px;color:#fff;cursor:pointer;font-size:16px;font-weight:600;gap:8px;justify-content:center;min-width:140px;padding:12px 24px;transition:all .2s ease}.nav-btn:hover{background-color:#2e59d9;box-shadow:0 4px 12px #4e73df4d;transform:translateY(-2px)}.nav-btn:disabled{background-color:#b7c4e6;box-shadow:none;cursor:not-allowed;transform:none}.nav-btn.prev-btn:before{content:"←";font-size:18px}.nav-btn.next-btn:after{content:"→";font-size:18px}.page-info{color:#4a5568;flex:1 1;font-size:16px;font-weight:700;text-align:center}.score-container{align-items:center;display:flex;justify-content:center;min-height:70vh;padding:20px}.score-card{animation:fadeIn .5s ease;background:#fff;border-radius:16px;box-shadow:0 8px 30px #0000001f;max-width:500px;padding:40px;text-align:center;width:100%}.score-title{color:#2d3748;font-size:28px;font-weight:700;margin-bottom:30px}.score-display{align-items:center;display:flex;flex-direction:column;gap:16px;margin:30px 0}.score-value{color:#4e73df;font-size:72px;font-weight:800;line-height:1}.score-percentage{color:#6c757d;font-size:32px;font-weight:600}.grade-badge{color:#fff;font-size:16px;letter-spacing:.5px;margin:10px 0;padding:8px 20px}.grade-badge,.score-status{display:inline-block;font-weight:700}.score-status{border-radius:25px;font-size:24px;margin-top:16px;padding:10px 30px}.score-status.pass{background-color:#d4edda;color:#155724}.score-status.fail{background-color:#f8d7da;color:#721c24}.score-grade{margin-bottom:40px;width:100%}.grade-bar{background-color:#e3e6f0;border-radius:12px;height:24px;margin-bottom:12px;overflow:hidden;position:relative}.grade-progress{background:linear-gradient(90deg,#4e73df,#2e59d9);border-radius:12px;height:100%;transition:width 1s ease-out}.grade-labels{display:flex;justify-content:space-between;padding:0 4px}.grade-label{color:#6c757d;font-size:14px;font-weight:500}.score-actions{display:flex;flex-direction:column;gap:16px;width:100%}.finish-btn,.proceed-btn,.review-btn{align-items:center;border:none;border-radius:8px;cursor:pointer;display:flex;font-size:16px;font-weight:600;gap:10px;justify-content:center;padding:16px 24px;transition:all .2s ease;width:100%}.review-btn{background-color:#36b9cc;color:#fff}.review-btn:hover{background-color:#2c9faf;box-shadow:0 4px 12px #36b9cc4d;transform:translateY(-2px)}.review-btn:before{content:"🔍";font-size:18px}.proceed-btn{background-color:#1cc88a;color:#fff}.proceed-btn:hover{background-color:#17a673;box-shadow:0 4px 12px #1cc88a4d;transform:translateY(-2px)}.proceed-btn:before{content:"📚";font-size:18px}.finish-btn{background-color:#4e73df;color:#fff}.finish-btn:hover{background-color:#2e59d9;box-shadow:0 4px 12px #4e73df4d;transform:translateY(-2px)}.finish-btn:before{content:"🏁";font-size:18px}.print-button-container{background-color:#fff;border:1px solid #e3e6f0;border-radius:12px;box-shadow:0 2px 8px #00000014;margin-bottom:24px;padding:20px;text-align:center}.print-button{align-items:center;background:linear-gradient(135deg,#4e73df,#2e59d9);border:none;border-radius:8px;color:#fff;cursor:pointer;display:flex;font-size:16px;font-weight:600;gap:12px;justify-content:center;padding:14px 28px;transition:all .2s ease;width:100%}.print-button:hover{box-shadow:0 4px 16px #4e73df66;transform:translateY(-2px)}.print-button:before{content:"🖨️";font-size:20px}.question-card.theory .print-button-container{align-items:center;display:flex;justify-content:flex-end;margin-bottom:18px;padding:12px 20px}.question-card.theory .print-button{box-shadow:0 8px 30px #2e59d92e;font-size:15px;max-width:360px;min-width:220px;padding:12px 22px;width:auto}.question-card.theory .print-button,.question-card.theory .print-button-container{z-index:50}.print-button-subtext{color:#6c757d;font-size:14px;font-weight:500;margin-top:8px;text-align:center}.print-status{align-items:center;border-radius:6px;display:inline-flex;font-size:14px;font-weight:600;gap:4px;margin-left:12px;padding:6px 12px}.print-status.correct{background-color:#28a745;color:#fff}.print-status.incorrect{background-color:#dc3545;color:#fff}.print-answer-summary{background-color:#f7fafc;border-left:4px solid #4e73df;border-radius:8px;margin-top:20px;padding:16px}.print-answer-summary div{align-items:center;color:#2d3748;display:flex;font-size:15px;gap:8px;margin-bottom:8px}.print-correct{color:#28a745;font-weight:700}.print-incorrect{color:#dc3545;font-weight:700}.image-modal-overlay{align-items:center;animation:fadeInOverlay .3s ease;background-color:#000000f2;bottom:0;display:flex;justify-content:center;left:0;position:fixed;right:0;top:0;z-index:10000}@keyframes fadeInOverlay{0%{opacity:0}to{opacity:1}}.image-modal-content{align-items:center;background:#141414e6;border-radius:12px;display:flex;flex-direction:column;height:95%;justify-content:center;overflow:hidden;padding:20px;position:relative;width:95%}.image-wrapper{cursor:grab;transform-origin:center;transition:transform .2s ease}.image-wrapper:active{cursor:grabbing}.modal-image{border-radius:8px;box-shadow:0 4px 20px #00000080;max-height:80vh;max-width:100%;object-fit:contain}.image-modal-controls{bottom:30px;display:flex;gap:16px;position:absolute;z-index:10001}.modal-btn{align-items:center;border:none;border-radius:8px;color:#fff;cursor:pointer;display:flex;font-size:15px;font-weight:600;gap:8px;justify-content:center;min-width:140px;padding:12px 24px;text-align:center;transition:all .2s ease}.reset-btn{background:linear-gradient(135deg,#6c757d,#5a6268)}.reset-btn:hover{background:linear-gradient(135deg,#5a6268,#4a5157);box-shadow:0 4px 12px #6c757d66;transform:translateY(-2px)}.close-btn{background:linear-gradient(135deg,#f44,#c00)}.close-btn:hover{background:linear-gradient(135deg,#c00,#900);box-shadow:0 4px 12px #f446;transform:translateY(-2px)}.reset-btn:before{content:"🔄"}.close-btn:before{content:"✕";font-size:18px;font-weight:700}.image-modal-hint{-webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px);background:#00000080;border-radius:20px;bottom:10px;color:#aaa;font-size:13px;padding:8px 16px;position:absolute;text-align:center}.custom-message-box{align-items:center;animation:fadeInOverlay .3s ease;background:#000000b3;bottom:0;display:flex;justify-content:center;left:0;position:fixed;right:0;top:0;z-index:10000}.message-box-content{animation:slideUp .4s ease;background:#fff;border-radius:16px;box-shadow:0 10px 40px #0003;max-width:500px;padding:30px;width:90%}@keyframes slideUp{0%{opacity:0;transform:translateY(30px)}to{opacity:1;transform:translateY(0)}}.message-box-title{color:#2d3748;font-size:24px;font-weight:700;margin-bottom:16px;text-align:center}.message-box-message{color:#4a5568;font-size:16px;line-height:1.6;margin-bottom:30px;text-align:center}.message-box-actions{display:flex;flex-direction:column;gap:12px}.message-box-button{border:none;border-radius:8px;cursor:pointer;font-size:16px;font-weight:600;padding:14px 24px;transition:all .2s ease;width:100%}.message-box-button.primary{background:linear-gradient(135deg,#4e73df,#2e59d9);color:#fff}.message-box-button.primary:hover{box-shadow:0 4px 12px #4e73df4d;transform:translateY(-2px)}.message-box-button.secondary{background:#f8f9fa;border:1px solid #e3e6f0;color:#4a5568}.message-box-button.secondary:hover{background:#e9ecef}.error-container,.loading-container{align-items:center;display:flex;flex-direction:column;justify-content:center;min-height:70vh;padding:40px;text-align:center}.spinner{height:60px;margin-bottom:24px;width:60px}.loading-container p{color:#4a5568;font-size:18px;font-weight:500}.error-title{color:#e74a3b;font-size:32px;font-weight:700;margin-bottom:16px}.error-text{color:#858796;font-size:18px;line-height:1.6;margin-bottom:30px;max-width:600px}.mc-question .equation-box{font-size:.9em!important}.mc-option .equation-box{font-size:1.1em!important}.theory-question .equation-box{font-size:1.2em!important}.theory-answer .equation-box{font-size:1.3em!important}@media (max-width:768px){.quiz-page{padding:12px}.question-card{margin-bottom:16px;padding:16px}.question-text{font-size:15px;padding:12px 16px}.option{min-height:56px;padding:14px 16px}.option-letter{font-size:15px}.score-card{margin:16px;padding:30px 20px}.score-value{font-size:56px}.score-percentage{font-size:24px}.nav-btn{font-size:15px;min-width:120px;padding:10px 20px}.quiz-navigation{gap:12px;padding:16px 0}.header-bottom-row,.header-top-row{align-items:stretch;flex-direction:column;gap:12px}.quiz-info{order:-1;text-align:center}.progress-container,.subject-container{justify-content:center}}@media (max-width:480px){.quiz-header{padding:12px}.question-header{align-items:flex-start;flex-direction:column;gap:8px}.answer-status{margin-left:0}.image-modal-controls{bottom:20px;flex-direction:column;width:90%}.modal-btn{width:100%}.score-actions{gap:12px}.finish-btn,.proceed-btn,.review-btn{font-size:15px;padding:14px 20px}}.hidden{display:none!important}.text-center{text-align:center}.mt-20{margin-top:20px}.mb-20{margin-bottom:20px}.flex{display:flex}.flex-col{flex-direction:column}.items-center{align-items:center}.justify-between{justify-content:space-between}.gap-4{gap:16px}.w-full{width:100%}::-webkit-scrollbar{height:10px;width:10px}::-webkit-scrollbar-track{background:#f1f1f1;border-radius:5px}::-webkit-scrollbar-thumb{background:#c1c1c1;border-radius:5px}::-webkit-scrollbar-thumb:hover{background:#a8a8a8}@keyframes fadeIn{0%{opacity:0;transform:translateY(10px)}to{opacity:1;transform:translateY(0)}}@keyframes pulse{0%{transform:scale(1)}50%{transform:scale(1.05)}to{transform:scale(1)}}.pulse{animation:pulse 2s infinite}@media (prefers-reduced-motion:reduce){*{animation-duration:.01ms!important;animation-iteration-count:1!important;transition-duration:.01ms!important}}:focus-visible{outline:2px solid #4e73df;outline-offset:2px}@media (prefers-color-scheme:dark){.quiz-page{background-color:#1a202c}.question-card{background-color:#2d3748;color:#e2e8f0}.options .option,.question-text{background-color:#2d3748;border-color:#4a5568;color:#e2e8f0}.option:hover{background-color:#4a5568}.option.selected{background-color:#2c5282;border-color:#4299e1}.mc-header,.review-notice{background-color:#4a5568;color:#e2e8f0}.attempt-counter{background:linear-gradient(135deg,#744210,#925c1b);color:#fef3c7}}.scores-page-container{margin:0 auto;max-width:1400px;padding:1.5rem}.scores-header{background:linear-gradient(135deg,#667eea,#764ba2);border-radius:12px;box-shadow:0 4px 20px #667eea4d;color:#fff;margin-bottom:1.5rem;overflow:hidden;padding:1.5rem;position:relative}.scores-header:before{background:radial-gradient(circle at top right,#ffffff1a 0,#0000 50%);bottom:0;content:"";left:0;position:absolute;right:0;top:0}.header-content{gap:1.5rem;position:relative;z-index:2}.header-title h1{color:#fff;font-size:1.75rem;font-weight:700;margin-bottom:.5rem}.header-title p{font-size:.95rem;margin:0;opacity:.9}.header-stats{display:flex;gap:1.5rem}.stat-badge{-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);background:#fff3;border-radius:10px;min-width:120px;padding:.75rem 1.25rem;text-align:center}.stat-badge .value{color:#fff;display:block;font-size:1.5rem;font-weight:700}.stat-badge .label{font-size:.85rem;margin-top:.25rem;opacity:.8}.filters-section{background:#fff;border:1px solid #f0f0f0;border-radius:12px;box-shadow:0 2px 12px #00000014;margin-bottom:1.5rem;padding:1.25rem}.filters-row{grid-gap:1rem;display:grid;gap:1rem;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));margin-bottom:1rem}.filter-group{gap:.5rem}.filter-label{align-items:center;color:#555;display:flex;font-size:.85rem;font-weight:600;gap:.5rem}.filter-label:before{background:#667eea;border-radius:2px;content:"";height:12px;width:4px}.filter-input,.filter-select{background:#fff;border:2px solid #e8e8e8;border-radius:8px;color:#333;font-size:.95rem;padding:.75rem;transition:all .3s ease}.filter-input:focus,.filter-select:focus{border-color:#667eea;box-shadow:0 0 0 3px #667eea1a;outline:none}.filter-select option{padding:.5rem}.filters-actions{align-items:center;border-top:1px solid #f0f0f0;display:flex;gap:1rem;justify-content:flex-end;padding-top:1rem}.btn{border-radius:8px;font-size:.95rem;font-weight:600;gap:.5rem;padding:.75rem 1.5rem;transition:all .3s ease}.btn-clear{background:#f8f9fa;border:2px solid #e8e8e8;color:#666}.btn-clear:hover{background:#e9ecef;transform:translateY(-2px)}.btn-print{background:linear-gradient(135deg,#10b981,#059669);box-shadow:0 2px 10px #10b9814d;color:#fff}.btn-print:hover{box-shadow:0 4px 15px #10b98166;transform:translateY(-2px)}.search-container{flex:1 1;max-width:300px}.search-icon{color:#999;font-size:1rem;left:1rem;top:50%;transform:translateY(-50%)}.search-input{border:2px solid #e8e8e8;border-radius:8px;color:#000;font-size:.95rem;padding:.75rem 1rem .75rem 2.75rem;transition:all .3s ease}.search-input:focus{border-color:#667eea;box-shadow:0 0 0 3px #667eea1a}.table-container{background:#fff;border:1px solid #f0f0f0;border-radius:12px;box-shadow:0 2px 12px #00000014;margin-bottom:1.5rem;overflow:hidden}.table-header{border-bottom:1px solid #f0f0f0;display:flex;justify-content:space-between;padding:1.25rem}.table-header h2{align-items:center;color:#333;display:flex;font-size:1.25rem;font-weight:700;gap:.75rem;margin:0}.table-header h2:before{background:#667eea;border-radius:3px;content:"";height:20px;width:6px}.table-summary{color:#666;font-size:.9rem;font-weight:500}.compact-table{border-collapse:collapse;font-size:.9rem;width:100%}.compact-table thead{background:#f8f9fa;position:-webkit-sticky;position:sticky;top:0;z-index:10}.compact-table th{border-bottom:2px solid #e8e8e8;color:#555;font-size:.9rem;font-weight:600;letter-spacing:.05em;padding:1rem 1.25rem;text-align:left;text-transform:uppercase;white-space:nowrap}.compact-table td{border-bottom:1px solid #f0f0f0;color:#333;padding:.875rem 1.25rem;vertical-align:middle}.compact-table tbody tr{transition:all .2s ease}.compact-table tbody tr:hover{background:#f8f9ff;box-shadow:0 2px 8px #667eea1a;transform:scale(1.001)}.subject-cell{gap:.75rem}.subject-cell,.subject-icon{align-items:center;display:flex}.subject-icon{border-radius:8px;color:#fff;flex-shrink:0;font-size:.9rem;font-weight:600;height:32px;justify-content:center;width:32px}.subject-icon.math{background:linear-gradient(135deg,#667eea,#764ba2)}.subject-icon.science{background:linear-gradient(135deg,#10b981,#059669)}.subject-icon.english{background:linear-gradient(135deg,#f59e0b,#d97706)}.subject-icon.computing{background:linear-gradient(135deg,#3b82f6,#1d4ed8)}.subject-icon.history{background:linear-gradient(135deg,#8b5cf6,#7c3aed)}.subject-icon.default{background:linear-gradient(135deg,#6b7280,#4b5563)}.subject-name{color:#333}.subject-type{color:#666;font-size:.8rem;margin-top:.125rem}.score-cell{align-items:center;display:flex;gap:.75rem}.score-bar{background:#e8e8e8;border-radius:4px;flex:1 1;height:8px;overflow:hidden}.score-fill{border-radius:4px;height:100%;transition:width .3s ease}.score-fill.excellent{background:linear-gradient(90deg,#10b981,#059669)}.score-fill.very-good{background:linear-gradient(90deg,#3b82f6,#1d4ed8)}.score-fill.good{background:linear-gradient(90deg,#f59e0b,#d97706)}.score-fill.credit{background:linear-gradient(90deg,#8b5cf6,#7c3aed)}.score-fill.fail{background:linear-gradient(90deg,#ef4444,#dc2626)}.score-value{font-size:1.1rem;font-weight:700;min-width:60px;text-align:right}.grade-badge{align-items:center;border-radius:20px;display:inline-flex;font-size:.85rem;font-weight:600;letter-spacing:.05em;padding:.375rem .875rem;text-transform:uppercase}.grade-badge.excellent{background:#10b9811a;border:1px solid #10b98133;color:#059669}.grade-badge.very-good{background:#3b82f61a;border:1px solid #3b82f633;color:#1d4ed8}.grade-badge.good{background:#f59e0b1a;border:1px solid #f59e0b33;color:#d97706}.grade-badge.credit{background:#8b5cf61a;border:1px solid #8b5cf633;color:#7c3aed}.grade-badge.fail{background:#ef44441a;border:1px solid #ef444433;color:#dc2626}.date-cell{display:flex;flex-direction:column;gap:.25rem}.date-main{color:#333;font-weight:600}.date-secondary{color:#666;font-size:.8rem}.empty-state{color:#666;padding:3rem 1.5rem}.empty-icon{color:#e8e8e8;margin-bottom:1rem}.empty-state h3{color:#333;font-size:1.25rem;font-weight:600;margin-bottom:.5rem}.empty-state p{line-height:1.6;margin:0 auto 1.5rem;max-width:400px}.pagination-container{align-items:center;background:#fff;border:1px solid #f0f0f0;border-radius:12px;box-shadow:0 2px 12px #00000014;display:flex;justify-content:space-between;padding:1rem}.pagination-info{color:#666;font-size:.9rem}.pagination-controls{align-items:center;display:flex;gap:.5rem}.pagination-btn{align-items:center;background:#fff;border:2px solid #e8e8e8;border-radius:8px;color:#666;cursor:pointer;display:flex;font-weight:600;height:36px;justify-content:center;transition:all .3s ease;width:36px}.pagination-btn:hover:not(:disabled){border-color:#667eea;color:#667eea;transform:translateY(-1px)}.pagination-btn:disabled{cursor:not-allowed;opacity:.5}.page-numbers{display:flex;gap:.25rem;margin:0 .5rem}.page-btn{align-items:center;background:#fff;border:2px solid #e8e8e8;border-radius:8px;color:#666;cursor:pointer;display:flex;font-size:.9rem;font-weight:600;height:36px;justify-content:center;min-width:36px;transition:all .3s ease}.page-btn:hover:not(.active){border-color:#667eea;color:#667eea}.page-btn.active{background:linear-gradient(135deg,#667eea,#764ba2);border-color:#667eea;color:#fff}.page-size-select{background:#fff;border:2px solid #e8e8e8;border-radius:8px;color:#666;cursor:pointer;font-size:.9rem;margin-left:1rem;padding:.5rem}.page-size-select:focus{border-color:#667eea;outline:none}.loading-state{background:#fff;border:1px solid #f0f0f0;border-radius:12px;box-shadow:0 2px 12px #00000014;min-height:400px}.loading-spinner{border:3px solid #f0f0f0;border-top-color:#667eea;height:48px;margin-bottom:1.5rem;width:48px}.loading-state p{color:#666;font-size:1rem}.error-state{align-items:center;background:#fff;border:1px solid #f0f0f0;border-radius:12px;box-shadow:0 2px 12px #00000014;display:flex;flex-direction:column;justify-content:center;min-height:400px;padding:2rem;text-align:center}.error-icon{color:#ef4444;font-size:3rem;margin-bottom:1rem}.error-state h2{color:#333;font-size:1.5rem;font-weight:700;margin-bottom:.5rem}.error-state p{color:#666;line-height:1.6;margin-bottom:1.5rem;max-width:400px}.btn-retry{background:linear-gradient(135deg,#667eea,#764ba2);border:none;border-radius:8px;color:#fff;cursor:pointer;font-weight:600;padding:.75rem 1.5rem;transition:all .3s ease}.btn-retry:hover{box-shadow:0 4px 15px #667eea4d;transform:translateY(-2px)}@media (max-width:1024px){.header-content{flex-direction:column;text-align:center}.header-stats{flex-wrap:wrap;justify-content:center}.filters-row{grid-template-columns:repeat(2,1fr)}}@media (max-width:768px){.scores-page-container{padding:1rem}.filters-row{grid-template-columns:1fr}.filters-actions{flex-direction:column}.search-container{max-width:100%}.table-header{flex-direction:column;gap:1rem;text-align:center}.compact-table{font-size:.85rem}.compact-table td,.compact-table th{padding:.75rem}.subject-cell{align-items:flex-start;flex-direction:column;gap:.5rem}.pagination-container{flex-direction:column;gap:1rem}}@media (max-width:480px){.stat-badge{min-width:100px;padding:.5rem 1rem}.stat-badge .value{font-size:1.25rem}.btn{font-size:.9rem;padding:.625rem 1.25rem}.page-numbers{display:none}}@media print{.scores-header{background:#667eea!important;color:#fff!important;-webkit-print-color-adjust:exact}.btn-print,.filters-section,.pagination-container{display:none}.table-container{border:1px solid #ddd;box-shadow:none}.compact-table tr{break-inside:avoid;page-break-inside:avoid}}.admin-users{padding:20px}.admin-users-header{align-items:center;display:flex;flex-wrap:wrap;gap:15px;justify-content:space-between;margin-bottom:20px}.search-container{align-items:center;display:flex;position:relative}.search-container input{border:1px solid #ddd;border-radius:4px;padding:8px 15px 8px 35px;width:250px}.search-icon{color:#777;left:10px}.users-table{margin-top:15px}.users-table td,.users-table th{border-bottom:1px solid #eee}.users-table th{background-color:#f5f5f5}.user-info-cell{align-items:center;display:flex;gap:15px}.user-avatar{background-color:#3498db}.user-details{display:flex;flex-direction:column}.user-name{font-weight:500}.user-join-date{color:#777;font-size:.8rem}.role-cell{align-items:center;display:flex;gap:8px}.role-icon{font-size:1.2rem}.role-icon.admin{color:#e74c3c}.role-icon.premium{color:#f39c12}.role-icon.student{color:#3498db}.role-select{border:1px solid #ddd;border-radius:4px;padding:5px 10px}.admin-users-error,.admin-users-loading{align-items:center;display:flex;flex-direction:column;height:200px;justify-content:center}.updating-indicator{color:#3498db;font-size:.8rem;margin-left:8px}.role-select:disabled{background-color:#f5f5f5;opacity:.7}.question-insertor{background-color:#fff;border-radius:8px;box-shadow:0 2px 10px #0000001a;margin:0 auto;max-width:1200px;padding:20px}.insertor-header{border-bottom:1px solid #eee;margin-bottom:20px;padding-bottom:15px}.controls{align-items:center;display:flex;flex-wrap:wrap;gap:15px;margin-bottom:20px}.dropdown-group{display:flex;flex-direction:column;min-width:150px}.dropdown-group label{font-weight:500;margin-bottom:5px}.dropdown-group select{background-color:#fff;border:1px solid #ddd;border-radius:4px;padding:8px 12px}.action-buttons{display:flex;flex-wrap:wrap;gap:10px;margin-left:auto}.action-buttons button{background:#f8f9fa;border:1px solid #ddd;border-radius:4px;cursor:pointer;padding:8px 16px;transition:all .3s}.action-buttons button:hover{background:#e9ecef}.tabs{margin-bottom:20px}.tabs button{background:#f8f9fa;border:1px solid #ddd;cursor:pointer;padding:10px 20px;transition:all .3s}.tabs button.active{background:#007bff;border-color:#007bff;color:#fff}.tabs button:first-child{border-radius:4px 0 0 4px}.tabs button:last-child{border-radius:0 4px 4px 0}.mc-form,.theory-form{display:flex;gap:20px;margin-bottom:20px}.form-section{flex:3 1}.image-section{display:flex;flex:1 1;flex-direction:column}.question-counter{background-color:#f0f0f0;border-radius:4px;font-weight:700;margin-bottom:15px;padding:5px 10px}.ql-editor{min-height:100px}.options-group{grid-gap:15px;display:grid;gap:15px;grid-template-columns:repeat(2,1fr);margin-bottom:20px}.option input{border:1px solid #ddd;border-radius:4px;padding:8px;width:100%}.image-controls{display:flex;gap:10px;margin-bottom:15px}.image-controls button{background:#f8f9fa;cursor:pointer;padding:8px 12px}.image-controls button,.image-preview{border:1px solid #ddd;border-radius:4px}.image-preview{align-items:center;min-height:200px}.image-preview,.navigation{display:flex;justify-content:center}.navigation{border-top:1px solid #eee;gap:20px;margin-top:20px;padding-top:20px}.navigation button{background-color:#007bff;border:none;border-radius:4px;color:#fff;cursor:pointer;font-weight:500;padding:10px 30px}.saved-questions{border-top:1px solid #eee;margin-top:20px;padding-top:15px}.questions-summary{display:flex;font-weight:500;gap:20px}.loading-overlay{align-items:center;background:#fffc;bottom:0;display:flex;flex-direction:column;justify-content:center;left:0;position:fixed;right:0;top:0;z-index:1000}.loading-spinner{animation:spin 1s linear infinite;border:4px solid #0000001a;border-radius:50%;border-top-color:#3498db;height:40px;margin-bottom:10px;width:40px}button:disabled{cursor:not-allowed;opacity:.5}.upload-progress{background:#f0f0f0;border-radius:4px;margin-top:10px;overflow:hidden;width:100%}.progress-bar{background:#4caf50;height:20px;transition:width .3s ease}.progress-text{font-size:12px;padding:2px 0;text-align:center}.image-preview{position:relative}.image-preview img{border:1px solid #ddd;border-radius:4px}.image-url{background:#f8f8f8;border-radius:4px;font-size:12px;margin-top:5px;padding:5px}.image-preview{border:1px solid #eee;border-radius:5px;margin-top:15px;padding:10px}.image-preview img{display:block;margin:0 auto;max-height:300px;max-width:100%}.image-url{color:#666;font-size:.8rem;margin-top:10px;word-break:break-all}.rich-text-editor{border:1px solid #ddd;border-radius:4px;margin-bottom:10px}.toolbar{background:#f8f9fa;border-bottom:1px solid #ddd;display:flex;flex-wrap:wrap;gap:5px;padding:8px}.toolbar button{background:#fff;border:1px solid #ddd;border-radius:3px;cursor:pointer;font-size:14px;padding:6px 10px}.toolbar button:hover{background:#e9ecef}.editor-content{min-height:100px;outline:none;padding:12px}.editor-content:empty:before{color:#6c757d;content:attr(placeholder);font-style:italic}.question-text-editor{min-height:150px}.theory-answer-editor{min-height:200px}.equation-box{background-color:#f8f9fa;border:1px solid #dee2e6;border-radius:4px;color:#d63384;display:inline-block;margin:0 2px;padding:2px 6px}.equation-button{font-size:18px;font-weight:700}.equation-modal{align-items:center;background-color:#00000080;bottom:0;display:flex;justify-content:center;left:0;position:fixed;right:0;top:0;z-index:1000}.equation-modal-content{background-color:#fff;border-radius:8px;max-width:90%;padding:20px;width:400px}.equation-modal-content h3{margin-top:0}.equation-modal-content input{border:1px solid #ddd;border-radius:4px;margin:10px 0;padding:8px;width:100%}.equation-modal-buttons{display:flex;gap:10px;justify-content:flex-end}.equation-modal-buttons button{border:none;border-radius:4px;cursor:pointer;padding:8px 16px}.equation-modal-buttons button:first-child{background-color:#007bff;color:#fff}.equation-modal-buttons button:last-child{background-color:#6c757d;color:#fff}.katex,.katex .katex-html,.katex .katex-mathml{color:#000!important}.katex .mfrac .frac-line{border-color:#000!important}.katex .mfrac .denominator,.katex .mfrac .numerator{color:#000!important}.theory-section{background:#fafafa;border:1px solid #eee;margin-bottom:12px;padding:12px}.section-image-preview img{display:block;margin-top:8px;max-height:120px;max-width:180px}.section-image-controls{margin-top:8px}.equation-box{font-size:1.5em;vertical-align:middle}.mc-question .equation-box{font-size:.8em!important}.mc-option .equation-box{font-size:1em!important}.theory-question .equation-box{font-size:.8em!important}.theory-answer .equation-box{font-size:1.1em!important}.correct-and-nav-row{align-items:center;display:flex;gap:16px;justify-content:space-between;margin-bottom:12px;margin-top:8px}.correct-answer-inline{flex:1 1;min-width:320px}.navigation-inline{align-items:center;display:flex;gap:8px}.navigation-inline button{background:#007bff;border:1px solid #ddd;border-radius:4px;color:#fff;cursor:pointer;padding:8px 14px}.navigation-inline button:disabled{background:#6c757d;cursor:not-allowed}@font-face{font-family:KaTeX_AMS;font-style:normal;font-weight:400;src:url(/static/media/KaTeX_AMS-Regular.73ea273a72f4aca30ca5.woff2) format("woff2"),url(/static/media/KaTeX_AMS-Regular.d562e886c52f12660a41.woff) format("woff"),url(/static/media/KaTeX_AMS-Regular.853be92419a6c3766b9a.ttf) format("truetype")}@font-face{font-family:KaTeX_Caligraphic;font-style:normal;font-weight:700;src:url(/static/media/KaTeX_Caligraphic-Bold.a1abf90dfd72792a577a.woff2) format("woff2"),url(/static/media/KaTeX_Caligraphic-Bold.d757c535a2e5902f1325.woff) format("woff"),url(/static/media/KaTeX_Caligraphic-Bold.7489a2fbfb9bfe704420.ttf) format("truetype")}@font-face{font-family:KaTeX_Caligraphic;font-style:normal;font-weight:400;src:url(/static/media/KaTeX_Caligraphic-Regular.d6484fce1ef428d5bd94.woff2) format("woff2"),url(/static/media/KaTeX_Caligraphic-Regular.db074fa22cf224af93d7.woff) format("woff"),url(/static/media/KaTeX_Caligraphic-Regular.7e873d3833eb108a0758.ttf) format("truetype")}@font-face{font-family:KaTeX_Fraktur;font-style:normal;font-weight:700;src:url(/static/media/KaTeX_Fraktur-Bold.931d67ea207ab37ee693.woff2) format("woff2"),url(/static/media/KaTeX_Fraktur-Bold.354501bac435c3264834.woff) format("woff"),url(/static/media/KaTeX_Fraktur-Bold.4c761b3711973ab04edf.ttf) format("truetype")}@font-face{font-family:KaTeX_Fraktur;font-style:normal;font-weight:400;src:url(/static/media/KaTeX_Fraktur-Regular.172d3529b26f8cedef6b.woff2) format("woff2"),url(/static/media/KaTeX_Fraktur-Regular.6fdf0ac577be0ba82a4c.woff) format("woff"),url(/static/media/KaTeX_Fraktur-Regular.ed305b5434865e06ffde.ttf) format("truetype")}@font-face{font-family:KaTeX_Main;font-style:normal;font-weight:700;src:url(/static/media/KaTeX_Main-Bold.39890742bc957b368704.woff2) format("woff2"),url(/static/media/KaTeX_Main-Bold.0c3b8929d377c0e9b2f3.woff) format("woff"),url(/static/media/KaTeX_Main-Bold.8169508bf58f8bd92ad8.ttf) format("truetype")}@font-face{font-family:KaTeX_Main;font-style:italic;font-weight:700;src:url(/static/media/KaTeX_Main-BoldItalic.20f389c4120be058d80a.woff2) format("woff2"),url(/static/media/KaTeX_Main-BoldItalic.428978dc7837d46de091.woff) format("woff"),url(/static/media/KaTeX_Main-BoldItalic.828abcb200061cffbaae.ttf) format("truetype")}@font-face{font-family:KaTeX_Main;font-style:italic;font-weight:400;src:url(/static/media/KaTeX_Main-Italic.fe2176f79edaa716e621.woff2) format("woff2"),url(/static/media/KaTeX_Main-Italic.fd947498bc16392e76c2.woff) format("woff"),url(/static/media/KaTeX_Main-Italic.fa675e5e4bec9eb250b6.ttf) format("truetype")}@font-face{font-family:KaTeX_Main;font-style:normal;font-weight:400;src:url(/static/media/KaTeX_Main-Regular.f650f111a3b890d116f1.woff2) format("woff2"),url(/static/media/KaTeX_Main-Regular.4f35fbcc9ee8614c2bcc.woff) format("woff"),url(/static/media/KaTeX_Main-Regular.9eba1d77abcf2aa6e94e.ttf) format("truetype")}@font-face{font-family:KaTeX_Math;font-style:italic;font-weight:700;src:url(/static/media/KaTeX_Math-BoldItalic.dcbcbd93bac0470b462d.woff2) format("woff2"),url(/static/media/KaTeX_Math-BoldItalic.3f07ed67f06c720120ce.woff) format("woff"),url(/static/media/KaTeX_Math-BoldItalic.bf2d440b3a42ea78a998.ttf) format("truetype")}@font-face{font-family:KaTeX_Math;font-style:italic;font-weight:400;src:url(/static/media/KaTeX_Math-Italic.6d3d25f4820d0da8f01f.woff2) format("woff2"),url(/static/media/KaTeX_Math-Italic.96759856b4e70f3a8338.woff) format("woff"),url(/static/media/KaTeX_Math-Italic.8a5f936332e8028c7278.ttf) format("truetype")}@font-face{font-family:"KaTeX_SansSerif";font-style:normal;font-weight:700;src:url(/static/media/KaTeX_SansSerif-Bold.95591a929f0d32aa282a.woff2) format("woff2"),url(/static/media/KaTeX_SansSerif-Bold.b9cd458ac6d5889ff9c3.woff) format("woff"),url(/static/media/KaTeX_SansSerif-Bold.5b49f4993ae22d7975b4.ttf) format("truetype")}@font-face{font-family:"KaTeX_SansSerif";font-style:italic;font-weight:400;src:url(/static/media/KaTeX_SansSerif-Italic.7d393d382f3e7fb1c637.woff2) format("woff2"),url(/static/media/KaTeX_SansSerif-Italic.8d593cfaa96238d5e2f8.woff) format("woff"),url(/static/media/KaTeX_SansSerif-Italic.b257a18c016f37ee4543.ttf) format("truetype")}@font-face{font-family:"KaTeX_SansSerif";font-style:normal;font-weight:400;src:url(/static/media/KaTeX_SansSerif-Regular.cd5e231e0cc53b2cb2c0.woff2) format("woff2"),url(/static/media/KaTeX_SansSerif-Regular.02271ec5cb9f5b4588ac.woff) format("woff"),url(/static/media/KaTeX_SansSerif-Regular.2f7bc363fc5424ebda59.ttf) format("truetype")}@font-face{font-family:KaTeX_Script;font-style:normal;font-weight:400;src:url(/static/media/KaTeX_Script-Regular.c81d1b2a4b75d3eded60.woff2) format("woff2"),url(/static/media/KaTeX_Script-Regular.073b3402d036714b4370.woff) format("woff"),url(/static/media/KaTeX_Script-Regular.fc9ba5249878cd8f8d88.ttf) format("truetype")}@font-face{font-family:KaTeX_Size1;font-style:normal;font-weight:400;src:url(/static/media/KaTeX_Size1-Regular.6eec866c69313624be60.woff2) format("woff2"),url(/static/media/KaTeX_Size1-Regular.0108e89c9003e8c14ea3.woff) format("woff"),url(/static/media/KaTeX_Size1-Regular.6de7d4b539221a49e9e2.ttf) format("truetype")}@font-face{font-family:KaTeX_Size2;font-style:normal;font-weight:400;src:url(/static/media/KaTeX_Size2-Regular.2960900c4f271311eb36.woff2) format("woff2"),url(/static/media/KaTeX_Size2-Regular.3a99e70aee4076660d38.woff) format("woff"),url(/static/media/KaTeX_Size2-Regular.57f5c1837853986ea1db.ttf) format("truetype")}@font-face{font-family:KaTeX_Size3;font-style:normal;font-weight:400;src:url(/static/media/KaTeX_Size3-Regular.e1951519f6f0596f7356.woff2) format("woff2"),url(/static/media/KaTeX_Size3-Regular.7947224e8a9914fa332b.woff) format("woff"),url(/static/media/KaTeX_Size3-Regular.8d6b6822586eea3d3b20.ttf) format("truetype")}@font-face{font-family:KaTeX_Size4;font-style:normal;font-weight:400;src:url(/static/media/KaTeX_Size4-Regular.e418bf257af1052628d8.woff2) format("woff2"),url(/static/media/KaTeX_Size4-Regular.aeffd8025cba3647f1a6.woff) format("woff"),url(/static/media/KaTeX_Size4-Regular.4ad7c7e8bb8d10a34bb7.ttf) format("truetype")}@font-face{font-family:KaTeX_Typewriter;font-style:normal;font-weight:400;src:url(/static/media/KaTeX_Typewriter-Regular.c295e7f71970f03c0549.woff2) format("woff2"),url(/static/media/KaTeX_Typewriter-Regular.4c6b94fd1d07f8beff7c.woff) format("woff"),url(/static/media/KaTeX_Typewriter-Regular.c5c02d763c89380dcb4e.ttf) format("truetype")}.katex{font:normal 1.21em KaTeX_Main,Times New Roman,serif;line-height:1.2;text-indent:0;text-rendering:auto}.katex *{-ms-high-contrast-adjust:none!important;border-color:currentColor}.katex .katex-version:after{content:"0.16.22"}.katex .katex-mathml{clip:rect(1px,1px,1px,1px);border:0;height:1px;overflow:hidden;padding:0;position:absolute;width:1px}.katex .katex-html>.newline{display:block}.katex .base{position:relative;white-space:nowrap;width:-webkit-min-content;width:min-content}.katex .base,.katex .strut{display:inline-block}.katex .textbf{font-weight:700}.katex .textit{font-style:italic}.katex .textrm{font-family:KaTeX_Main}.katex .textsf{font-family:KaTeX_SansSerif}.katex .texttt{font-family:KaTeX_Typewriter}.katex .mathnormal{font-family:KaTeX_Math;font-style:italic}.katex .mathit{font-family:KaTeX_Main;font-style:italic}.katex .mathrm{font-style:normal}.katex .mathbf{font-family:KaTeX_Main;font-weight:700}.katex .boldsymbol{font-family:KaTeX_Math;font-style:italic;font-weight:700}.katex .amsrm,.katex .mathbb,.katex .textbb{font-family:KaTeX_AMS}.katex .mathcal{font-family:KaTeX_Caligraphic}.katex .mathfrak,.katex .textfrak{font-family:KaTeX_Fraktur}.katex .mathboldfrak,.katex .textboldfrak{font-family:KaTeX_Fraktur;font-weight:700}.katex .mathtt{font-family:KaTeX_Typewriter}.katex .mathscr,.katex .textscr{font-family:KaTeX_Script}.katex .mathsf,.katex .textsf{font-family:KaTeX_SansSerif}.katex .mathboldsf,.katex .textboldsf{font-family:KaTeX_SansSerif;font-weight:700}.katex .mathitsf,.katex .mathsfit,.katex .textitsf{font-family:KaTeX_SansSerif;font-style:italic}.katex .mainrm{font-family:KaTeX_Main;font-style:normal}.katex .vlist-t{border-collapse:collapse;display:inline-table;table-layout:fixed}.katex .vlist-r{display:table-row}.katex .vlist{display:table-cell;position:relative;vertical-align:bottom}.katex .vlist>span{display:block;height:0;position:relative}.katex .vlist>span>span{display:inline-block}.katex .vlist>span>.pstrut{overflow:hidden;width:0}.katex .vlist-t2{margin-right:-2px}.katex .vlist-s{display:table-cell;font-size:1px;min-width:2px;vertical-align:bottom;width:2px}.katex .vbox{align-items:baseline;display:inline-flex;flex-direction:column}.katex .hbox{width:100%}.katex .hbox,.katex .thinbox{display:inline-flex;flex-direction:row}.katex .thinbox{max-width:0;width:0}.katex .msupsub{text-align:left}.katex .mfrac>span>span{text-align:center}.katex .mfrac .frac-line{border-bottom-style:solid;display:inline-block;width:100%}.katex .hdashline,.katex .hline,.katex .mfrac .frac-line,.katex .overline .overline-line,.katex .rule,.katex .underline .underline-line{min-height:1px}.katex .mspace{display:inline-block}.katex .clap,.katex .llap,.katex .rlap{position:relative;width:0}.katex .clap>.inner,.katex .llap>.inner,.katex .rlap>.inner{position:absolute}.katex .clap>.fix,.katex .llap>.fix,.katex .rlap>.fix{display:inline-block}.katex .llap>.inner{right:0}.katex .clap>.inner,.katex .rlap>.inner{left:0}.katex .clap>.inner>span{margin-left:-50%;margin-right:50%}.katex .rule{border:0 solid;display:inline-block;position:relative}.katex .hline,.katex .overline .overline-line,.katex .underline .underline-line{border-bottom-style:solid;display:inline-block;width:100%}.katex .hdashline{border-bottom-style:dashed;display:inline-block;width:100%}.katex .sqrt>.root{margin-left:.2777777778em;margin-right:-.5555555556em}.katex .fontsize-ensurer.reset-size1.size1,.katex .sizing.reset-size1.size1{font-size:1em}.katex .fontsize-ensurer.reset-size1.size2,.katex .sizing.reset-size1.size2{font-size:1.2em}.katex .fontsize-ensurer.reset-size1.size3,.katex .sizing.reset-size1.size3{font-size:1.4em}.katex .fontsize-ensurer.reset-size1.size4,.katex .sizing.reset-size1.size4{font-size:1.6em}.katex .fontsize-ensurer.reset-size1.size5,.katex .sizing.reset-size1.size5{font-size:1.8em}.katex .fontsize-ensurer.reset-size1.size6,.katex .sizing.reset-size1.size6{font-size:2em}.katex .fontsize-ensurer.reset-size1.size7,.katex .sizing.reset-size1.size7{font-size:2.4em}.katex .fontsize-ensurer.reset-size1.size8,.katex .sizing.reset-size1.size8{font-size:2.88em}.katex .fontsize-ensurer.reset-size1.size9,.katex .sizing.reset-size1.size9{font-size:3.456em}.katex .fontsize-ensurer.reset-size1.size10,.katex .sizing.reset-size1.size10{font-size:4.148em}.katex .fontsize-ensurer.reset-size1.size11,.katex .sizing.reset-size1.size11{font-size:4.976em}.katex .fontsize-ensurer.reset-size2.size1,.katex .sizing.reset-size2.size1{font-size:.8333333333em}.katex .fontsize-ensurer.reset-size2.size2,.katex .sizing.reset-size2.size2{font-size:1em}.katex .fontsize-ensurer.reset-size2.size3,.katex .sizing.reset-size2.size3{font-size:1.1666666667em}.katex .fontsize-ensurer.reset-size2.size4,.katex .sizing.reset-size2.size4{font-size:1.3333333333em}.katex .fontsize-ensurer.reset-size2.size5,.katex .sizing.reset-size2.size5{font-size:1.5em}.katex .fontsize-ensurer.reset-size2.size6,.katex .sizing.reset-size2.size6{font-size:1.6666666667em}.katex .fontsize-ensurer.reset-size2.size7,.katex .sizing.reset-size2.size7{font-size:2em}.katex .fontsize-ensurer.reset-size2.size8,.katex .sizing.reset-size2.size8{font-size:2.4em}.katex .fontsize-ensurer.reset-size2.size9,.katex .sizing.reset-size2.size9{font-size:2.88em}.katex .fontsize-ensurer.reset-size2.size10,.katex .sizing.reset-size2.size10{font-size:3.4566666667em}.katex .fontsize-ensurer.reset-size2.size11,.katex .sizing.reset-size2.size11{font-size:4.1466666667em}.katex .fontsize-ensurer.reset-size3.size1,.katex .sizing.reset-size3.size1{font-size:.7142857143em}.katex .fontsize-ensurer.reset-size3.size2,.katex .sizing.reset-size3.size2{font-size:.8571428571em}.katex .fontsize-ensurer.reset-size3.size3,.katex .sizing.reset-size3.size3{font-size:1em}.katex .fontsize-ensurer.reset-size3.size4,.katex .sizing.reset-size3.size4{font-size:1.1428571429em}.katex .fontsize-ensurer.reset-size3.size5,.katex .sizing.reset-size3.size5{font-size:1.2857142857em}.katex .fontsize-ensurer.reset-size3.size6,.katex .sizing.reset-size3.size6{font-size:1.4285714286em}.katex .fontsize-ensurer.reset-size3.size7,.katex .sizing.reset-size3.size7{font-size:1.7142857143em}.katex .fontsize-ensurer.reset-size3.size8,.katex .sizing.reset-size3.size8{font-size:2.0571428571em}.katex .fontsize-ensurer.reset-size3.size9,.katex .sizing.reset-size3.size9{font-size:2.4685714286em}.katex .fontsize-ensurer.reset-size3.size10,.katex .sizing.reset-size3.size10{font-size:2.9628571429em}.katex .fontsize-ensurer.reset-size3.size11,.katex .sizing.reset-size3.size11{font-size:3.5542857143em}.katex .fontsize-ensurer.reset-size4.size1,.katex .sizing.reset-size4.size1{font-size:.625em}.katex .fontsize-ensurer.reset-size4.size2,.katex .sizing.reset-size4.size2{font-size:.75em}.katex .fontsize-ensurer.reset-size4.size3,.katex .sizing.reset-size4.size3{font-size:.875em}.katex .fontsize-ensurer.reset-size4.size4,.katex .sizing.reset-size4.size4{font-size:1em}.katex .fontsize-ensurer.reset-size4.size5,.katex .sizing.reset-size4.size5{font-size:1.125em}.katex .fontsize-ensurer.reset-size4.size6,.katex .sizing.reset-size4.size6{font-size:1.25em}.katex .fontsize-ensurer.reset-size4.size7,.katex .sizing.reset-size4.size7{font-size:1.5em}.katex .fontsize-ensurer.reset-size4.size8,.katex .sizing.reset-size4.size8{font-size:1.8em}.katex .fontsize-ensurer.reset-size4.size9,.katex .sizing.reset-size4.size9{font-size:2.16em}.katex .fontsize-ensurer.reset-size4.size10,.katex .sizing.reset-size4.size10{font-size:2.5925em}.katex .fontsize-ensurer.reset-size4.size11,.katex .sizing.reset-size4.size11{font-size:3.11em}.katex .fontsize-ensurer.reset-size5.size1,.katex .sizing.reset-size5.size1{font-size:.5555555556em}.katex .fontsize-ensurer.reset-size5.size2,.katex .sizing.reset-size5.size2{font-size:.6666666667em}.katex .fontsize-ensurer.reset-size5.size3,.katex .sizing.reset-size5.size3{font-size:.7777777778em}.katex .fontsize-ensurer.reset-size5.size4,.katex .sizing.reset-size5.size4{font-size:.8888888889em}.katex .fontsize-ensurer.reset-size5.size5,.katex .sizing.reset-size5.size5{font-size:1em}.katex .fontsize-ensurer.reset-size5.size6,.katex .sizing.reset-size5.size6{font-size:1.1111111111em}.katex .fontsize-ensurer.reset-size5.size7,.katex .sizing.reset-size5.size7{font-size:1.3333333333em}.katex .fontsize-ensurer.reset-size5.size8,.katex .sizing.reset-size5.size8{font-size:1.6em}.katex .fontsize-ensurer.reset-size5.size9,.katex .sizing.reset-size5.size9{font-size:1.92em}.katex .fontsize-ensurer.reset-size5.size10,.katex .sizing.reset-size5.size10{font-size:2.3044444444em}.katex .fontsize-ensurer.reset-size5.size11,.katex .sizing.reset-size5.size11{font-size:2.7644444444em}.katex .fontsize-ensurer.reset-size6.size1,.katex .sizing.reset-size6.size1{font-size:.5em}.katex .fontsize-ensurer.reset-size6.size2,.katex .sizing.reset-size6.size2{font-size:.6em}.katex .fontsize-ensurer.reset-size6.size3,.katex .sizing.reset-size6.size3{font-size:.7em}.katex .fontsize-ensurer.reset-size6.size4,.katex .sizing.reset-size6.size4{font-size:.8em}.katex .fontsize-ensurer.reset-size6.size5,.katex .sizing.reset-size6.size5{font-size:.9em}.katex .fontsize-ensurer.reset-size6.size6,.katex .sizing.reset-size6.size6{font-size:1em}.katex .fontsize-ensurer.reset-size6.size7,.katex .sizing.reset-size6.size7{font-size:1.2em}.katex .fontsize-ensurer.reset-size6.size8,.katex .sizing.reset-size6.size8{font-size:1.44em}.katex .fontsize-ensurer.reset-size6.size9,.katex .sizing.reset-size6.size9{font-size:1.728em}.katex .fontsize-ensurer.reset-size6.size10,.katex .sizing.reset-size6.size10{font-size:2.074em}.katex .fontsize-ensurer.reset-size6.size11,.katex .sizing.reset-size6.size11{font-size:2.488em}.katex .fontsize-ensurer.reset-size7.size1,.katex .sizing.reset-size7.size1{font-size:.4166666667em}.katex .fontsize-ensurer.reset-size7.size2,.katex .sizing.reset-size7.size2{font-size:.5em}.katex .fontsize-ensurer.reset-size7.size3,.katex .sizing.reset-size7.size3{font-size:.5833333333em}.katex .fontsize-ensurer.reset-size7.size4,.katex .sizing.reset-size7.size4{font-size:.6666666667em}.katex .fontsize-ensurer.reset-size7.size5,.katex .sizing.reset-size7.size5{font-size:.75em}.katex .fontsize-ensurer.reset-size7.size6,.katex .sizing.reset-size7.size6{font-size:.8333333333em}.katex .fontsize-ensurer.reset-size7.size7,.katex .sizing.reset-size7.size7{font-size:1em}.katex .fontsize-ensurer.reset-size7.size8,.katex .sizing.reset-size7.size8{font-size:1.2em}.katex .fontsize-ensurer.reset-size7.size9,.katex .sizing.reset-size7.size9{font-size:1.44em}.katex .fontsize-ensurer.reset-size7.size10,.katex .sizing.reset-size7.size10{font-size:1.7283333333em}.katex .fontsize-ensurer.reset-size7.size11,.katex .sizing.reset-size7.size11{font-size:2.0733333333em}.katex .fontsize-ensurer.reset-size8.size1,.katex .sizing.reset-size8.size1{font-size:.3472222222em}.katex .fontsize-ensurer.reset-size8.size2,.katex .sizing.reset-size8.size2{font-size:.4166666667em}.katex .fontsize-ensurer.reset-size8.size3,.katex .sizing.reset-size8.size3{font-size:.4861111111em}.katex .fontsize-ensurer.reset-size8.size4,.katex .sizing.reset-size8.size4{font-size:.5555555556em}.katex .fontsize-ensurer.reset-size8.size5,.katex .sizing.reset-size8.size5{font-size:.625em}.katex .fontsize-ensurer.reset-size8.size6,.katex .sizing.reset-size8.size6{font-size:.6944444444em}.katex .fontsize-ensurer.reset-size8.size7,.katex .sizing.reset-size8.size7{font-size:.8333333333em}.katex .fontsize-ensurer.reset-size8.size8,.katex .sizing.reset-size8.size8{font-size:1em}.katex .fontsize-ensurer.reset-size8.size9,.katex .sizing.reset-size8.size9{font-size:1.2em}.katex .fontsize-ensurer.reset-size8.size10,.katex .sizing.reset-size8.size10{font-size:1.4402777778em}.katex .fontsize-ensurer.reset-size8.size11,.katex .sizing.reset-size8.size11{font-size:1.7277777778em}.katex .fontsize-ensurer.reset-size9.size1,.katex .sizing.reset-size9.size1{font-size:.2893518519em}.katex .fontsize-ensurer.reset-size9.size2,.katex .sizing.reset-size9.size2{font-size:.3472222222em}.katex .fontsize-ensurer.reset-size9.size3,.katex .sizing.reset-size9.size3{font-size:.4050925926em}.katex .fontsize-ensurer.reset-size9.size4,.katex .sizing.reset-size9.size4{font-size:.462962963em}.katex .fontsize-ensurer.reset-size9.size5,.katex .sizing.reset-size9.size5{font-size:.5208333333em}.katex .fontsize-ensurer.reset-size9.size6,.katex .sizing.reset-size9.size6{font-size:.5787037037em}.katex .fontsize-ensurer.reset-size9.size7,.katex .sizing.reset-size9.size7{font-size:.6944444444em}.katex .fontsize-ensurer.reset-size9.size8,.katex .sizing.reset-size9.size8{font-size:.8333333333em}.katex .fontsize-ensurer.reset-size9.size9,.katex .sizing.reset-size9.size9{font-size:1em}.katex .fontsize-ensurer.reset-size9.size10,.katex .sizing.reset-size9.size10{font-size:1.2002314815em}.katex .fontsize-ensurer.reset-size9.size11,.katex .sizing.reset-size9.size11{font-size:1.4398148148em}.katex .fontsize-ensurer.reset-size10.size1,.katex .sizing.reset-size10.size1{font-size:.2410800386em}.katex .fontsize-ensurer.reset-size10.size2,.katex .sizing.reset-size10.size2{font-size:.2892960463em}.katex .fontsize-ensurer.reset-size10.size3,.katex .sizing.reset-size10.size3{font-size:.337512054em}.katex .fontsize-ensurer.reset-size10.size4,.katex .sizing.reset-size10.size4{font-size:.3857280617em}.katex .fontsize-ensurer.reset-size10.size5,.katex .sizing.reset-size10.size5{font-size:.4339440694em}.katex .fontsize-ensurer.reset-size10.size6,.katex .sizing.reset-size10.size6{font-size:.4821600771em}.katex .fontsize-ensurer.reset-size10.size7,.katex .sizing.reset-size10.size7{font-size:.5785920926em}.katex .fontsize-ensurer.reset-size10.size8,.katex .sizing.reset-size10.size8{font-size:.6943105111em}.katex .fontsize-ensurer.reset-size10.size9,.katex .sizing.reset-size10.size9{font-size:.8331726133em}.katex .fontsize-ensurer.reset-size10.size10,.katex .sizing.reset-size10.size10{font-size:1em}.katex .fontsize-ensurer.reset-size10.size11,.katex .sizing.reset-size10.size11{font-size:1.1996142719em}.katex .fontsize-ensurer.reset-size11.size1,.katex .sizing.reset-size11.size1{font-size:.2009646302em}.katex .fontsize-ensurer.reset-size11.size2,.katex .sizing.reset-size11.size2{font-size:.2411575563em}.katex .fontsize-ensurer.reset-size11.size3,.katex .sizing.reset-size11.size3{font-size:.2813504823em}.katex .fontsize-ensurer.reset-size11.size4,.katex .sizing.reset-size11.size4{font-size:.3215434084em}.katex .fontsize-ensurer.reset-size11.size5,.katex .sizing.reset-size11.size5{font-size:.3617363344em}.katex .fontsize-ensurer.reset-size11.size6,.katex .sizing.reset-size11.size6{font-size:.4019292605em}.katex .fontsize-ensurer.reset-size11.size7,.katex .sizing.reset-size11.size7{font-size:.4823151125em}.katex .fontsize-ensurer.reset-size11.size8,.katex .sizing.reset-size11.size8{font-size:.578778135em}.katex .fontsize-ensurer.reset-size11.size9,.katex .sizing.reset-size11.size9{font-size:.6945337621em}.katex .fontsize-ensurer.reset-size11.size10,.katex .sizing.reset-size11.size10{font-size:.8336012862em}.katex .fontsize-ensurer.reset-size11.size11,.katex .sizing.reset-size11.size11{font-size:1em}.katex .delimsizing.size1{font-family:KaTeX_Size1}.katex .delimsizing.size2{font-family:KaTeX_Size2}.katex .delimsizing.size3{font-family:KaTeX_Size3}.katex .delimsizing.size4{font-family:KaTeX_Size4}.katex .delimsizing.mult .delim-size1>span{font-family:KaTeX_Size1}.katex .delimsizing.mult .delim-size4>span{font-family:KaTeX_Size4}.katex .nulldelimiter{display:inline-block;width:.12em}.katex .delimcenter,.katex .op-symbol{position:relative}.katex .op-symbol.small-op{font-family:KaTeX_Size1}.katex .op-symbol.large-op{font-family:KaTeX_Size2}.katex .accent>.vlist-t,.katex .op-limits>.vlist-t{text-align:center}.katex .accent .accent-body{position:relative}.katex .accent .accent-body:not(.accent-full){width:0}.katex .overlay{display:block}.katex .mtable .vertical-separator{display:inline-block;min-width:1px}.katex .mtable .arraycolsep{display:inline-block}.katex .mtable .col-align-c>.vlist-t{text-align:center}.katex .mtable .col-align-l>.vlist-t{text-align:left}.katex .mtable .col-align-r>.vlist-t{text-align:right}.katex .svg-align{text-align:left}.katex svg{fill:currentColor;stroke:currentColor;fill-rule:nonzero;fill-opacity:1;stroke-width:1;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-dasharray:none;stroke-dashoffset:0;stroke-opacity:1;display:block;height:inherit;position:absolute;width:100%}.katex svg path{stroke:none}.katex img{border-style:none;max-height:none;max-width:none;min-height:0;min-width:0}.katex .stretchy{display:block;overflow:hidden;position:relative;width:100%}.katex .stretchy:after,.katex .stretchy:before{content:""}.katex .hide-tail{overflow:hidden;position:relative;width:100%}.katex .halfarrow-left{left:0;overflow:hidden;position:absolute;width:50.2%}.katex .halfarrow-right{overflow:hidden;position:absolute;right:0;width:50.2%}.katex .brace-left{left:0;overflow:hidden;position:absolute;width:25.1%}.katex .brace-center{left:25%;overflow:hidden;position:absolute;width:50%}.katex .brace-right{overflow:hidden;position:absolute;right:0;width:25.1%}.katex .x-arrow-pad{padding:0 .5em}.katex .cd-arrow-pad{padding:0 .55556em 0 .27778em}.katex .mover,.katex .munder,.katex .x-arrow{text-align:center}.katex .boxpad{padding:0 .3em}.katex .fbox,.katex .fcolorbox{border:.04em solid;box-sizing:border-box}.katex .cancel-pad{padding:0 .2em}.katex .cancel-lap{margin-left:-.2em;margin-right:-.2em}.katex .sout{border-bottom-style:solid;border-bottom-width:.08em}.katex .angl{border-right:.049em solid;border-top:.049em solid;box-sizing:border-box;margin-right:.03889em}.katex .anglpad{padding:0 .03889em}.katex .eqn-num:before{content:"(" counter(katexEqnNo) ")";counter-increment:katexEqnNo}.katex .mml-eqn-num:before{content:"(" counter(mmlEqnNo) ")";counter-increment:mmlEqnNo}.katex .mtr-glue{width:50%}.katex .cd-vert-arrow{display:inline-block;position:relative}.katex .cd-label-left{display:inline-block;position:absolute;right:calc(50% + .3em);text-align:left}.katex .cd-label-right{display:inline-block;left:calc(50% + .3em);position:absolute;text-align:right}.katex-display{display:block;margin:1em 0;text-align:center}.katex-display>.katex{display:block;text-align:center;white-space:nowrap}.katex-display>.katex>.katex-html{display:block;position:relative}.katex-display>.katex>.katex-html>.tag{position:absolute;right:0}.katex-display.leqno>.katex>.katex-html>.tag{left:0;right:auto}.katex-display.fleqn>.katex{padding-left:2em;text-align:left}body{counter-reset:katexEqnNo mmlEqnNo}.admin-settings{padding:20px}.settings-form{background:#fff;border-radius:8px;box-shadow:0 2px 10px #0000001a;margin-top:20px;max-width:600px;padding:25px}.form-group label{align-items:center;display:flex;gap:10px}.form-group input[type=checkbox]{width:auto}.form-group input[type=number]{border:1px solid #ddd;border-radius:4px;margin-left:10px;padding:8px;width:100px}.form-help-text{color:#666;font-size:.85rem;margin-left:25px;margin-top:5px}.save-button{align-items:center;background-color:#2ecc71;display:flex;font-weight:500;gap:8px;padding:10px 20px}.save-button:hover{background-color:#27ae60}.spinner-icon{animation:spin 1s linear infinite}.admin-settings-error,.admin-settings-loading{align-items:center;display:flex;flex-direction:column;height:200px;justify-content:center}.admin-subjects{padding:20px}.subjects-container{display:flex;gap:30px;margin-top:20px}.subjects-form{background:#fff;border-radius:8px;box-shadow:0 2px 10px #0000001a;flex:1 1;max-width:400px;padding:20px}.subjects-list{flex:2 1}.form-group{margin-bottom:15px}.form-group label{font-weight:500;margin-bottom:5px}.form-group input,.form-group textarea{border:1px solid #ddd;border-radius:4px;padding:8px;width:100%}.form-group textarea{min-height:80px}.form-actions{margin-top:15px}.save-button{background-color:#3498db;border:none;border-radius:4px;color:#fff;cursor:pointer;padding:8px 15px}.save-button:hover{background-color:#2980b9}.cancel-button{background-color:#e74c3c;border:none;border-radius:4px;color:#fff;cursor:pointer;padding:8px 15px}.cancel-button:hover{background-color:#c0392b}.subjects-list ul{list-style:none;margin:0;padding:0}.subjects-list li{align-items:center;background:#fff;border-radius:8px;box-shadow:0 2px 5px #0000001a;display:flex;justify-content:space-between;margin-bottom:10px;padding:15px}.subjects-list li.inactive{background-color:#f9f9f9;opacity:.7}.subject-info h3{margin:0 0 5px}.subject-info p{color:#666;margin:0 0 5px}.subject-status{color:#666;font-size:.85rem}.subject-actions{display:flex;gap:10px}.delete-button,.edit-button{background:none;border:none;cursor:pointer;font-size:1.1rem;padding:5px}.edit-button{color:#3498db}.delete-button{color:#e74c3c}.admin-subjects-error,.admin-subjects-loading{align-items:center;display:flex;flex-direction:column;height:200px;justify-content:center}.spinner{border:4px solid #0000001a;height:30px;margin-bottom:10px;width:30px}.admin-dashboard{margin:0 auto;max-width:1400px;padding:20px}.dashboard-header{align-items:center;display:flex;justify-content:space-between}.header-content{flex-grow:1}.dashboard-header h1{color:#2c3e50;margin-bottom:5px}.dashboard-header p{color:#7f8c8d;font-size:16px}.stats-overview{grid-gap:20px;display:grid;gap:20px;grid-template-columns:repeat(auto-fill,200px);justify-content:center;margin-bottom:30px}.stat-card{align-items:center;background:#fff;border-radius:10px;box-shadow:0 4px 8px #0000001a;display:flex;padding:20px;transition:transform .3s ease}.stat-card:hover{transform:translateY(-5px)}.stat-icon{align-items:center;border-radius:50%;color:#fff;display:flex;font-size:20px;height:50px;justify-content:center;margin-right:15px;width:50px}.stat-icon.total-users{background-color:#4e73df}.stat-icon.premium-users{background-color:#1cc88a}.stat-icon.regular-users{background-color:#36b9cc}.stat-icon.average-score{background-color:#f6c23e}.stat-icon.total-quizzes{background-color:#e74a3b}.stat-content h3{color:#7f8c8d;font-size:14px;margin:0}.stat-content p{color:#2c3e50;font-size:24px;font-weight:700;margin:5px 0 0}.overall-analytics-section{background:#fff;border-radius:10px;box-shadow:0 4px 8px #0000001a;margin-bottom:30px;padding:25px}.section-header{align-items:center;display:flex;justify-content:space-between;margin-bottom:20px}.section-header h2{color:#2c3e50;margin:0}.filter-controls{gap:15px}.filter-group{display:flex;flex-direction:column;gap:5px}.filter-group label{color:#7f8c8d;font-size:14px}.filter-group select{background:#fff;border:1px solid #ddd;border-radius:5px;padding:8px 12px}.analytics-charts{grid-gap:20px;display:grid;gap:20px;grid-template-columns:repeat(auto-fit,minmax(400px,1fr));margin-top:20px}.chart-card{background:#f8f9fa;box-shadow:0 2px 4px #0000000d}.chart-card h3{color:#2c3e50;font-size:18px;margin-bottom:15px;margin-top:0}.activity-table{width:100%}.table-header{border-bottom:2px solid #ddd;font-weight:700}.table-header,.table-row{grid-template-columns:1fr 1fr 1fr 1fr;padding:12px 15px}.table-row{border-bottom:1px solid #eee}.table-row:nth-child(2n){background:#f8f9fa}.user-search-section.top-right .search-container{position:relative}.search-box{background:#fff;border-radius:50px;box-shadow:0 4px 15px #0003;padding:10px 15px}.search-box input{background:#0000;border:none;font-size:16px;outline:none;padding:8px 12px;width:300px}.round-search-button{align-items:center;background:#4e73df;border:none;border-radius:50%;color:#fff;cursor:pointer;display:flex;height:30px;justify-content:center;transition:background .3s ease;width:30px}.round-search-button:hover{background:#2e59d9}.search-results{background:#fff;border-radius:10px;box-shadow:0 4px 15px #0003;margin-top:10px;max-height:400px;overflow-y:auto;position:absolute;right:0;top:100%;width:350px;z-index:9999}.search-results-header{align-items:center;border-bottom:1px solid #eee;color:#2c3e50;display:flex;font-weight:700;justify-content:space-between;padding:15px}.close-results{background:none;border:none;color:#7f8c8d;cursor:pointer;font-size:18px}.user-result{align-items:center;cursor:pointer;display:flex;padding:12px 15px;transition:background .2s ease}.user-result:hover{background:#f8f9fa}.user-result.selected{background:#e3f2fd}.user-avatar{align-items:center;background:#4e73df;border-radius:50%;color:#fff;display:flex;font-weight:700;height:40px;justify-content:center;margin-right:12px;width:40px}.user-info{flex:1 1}.user-name{color:#2c3e50;font-weight:700}.user-email,.user-role{color:#7f8c8d;font-size:12px}.user-role{background:#f8f9fa;border-radius:15px;padding:4px 8px}.user-analytics{background:#fff;border-radius:10px;box-shadow:0 4px 8px #0000001a;margin-bottom:80px;padding:25px}.user-analytics-header{align-items:center;display:flex;flex-wrap:wrap;gap:15px;justify-content:space-between;margin-bottom:20px}.user-analytics-header h2{color:#2c3e50;margin:0}.back-button{background:#f8f9fa;border:1px solid #ddd;border-radius:5px;display:flex;padding:8px 15px;transition:background .3s ease}.back-button:hover{background:#e9ecef}.analytics-overview{grid-gap:20px;display:grid;gap:20px;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));margin-bottom:30px}.overview-card{background:#f8f9fa;border-radius:10px;padding:20px;text-align:center}.overview-card h3{color:#7f8c8d;font-size:14px;margin:0 0 10px}.overview-card p{color:#2c3e50;font-size:24px;font-weight:700;margin:0}.compact .table-header,.compact .table-row{font-size:14px;grid-template-columns:1fr 1fr 1fr 1fr;padding:10px 15px}.colored-header{background:#4e73df;color:#fff}.loading,.no-data,.no-results{color:#7f8c8d;padding:20px;text-align:center}.error-message{align-items:center;background:#ffe6e6;border:1px solid #fcc;border-radius:5px;color:#d63031;display:flex;justify-content:space-between;margin:20px 0;padding:15px}.dismiss-btn{background:none;border:none;color:#d63031;cursor:pointer;font-size:20px}@media (max-width:768px){.analytics-charts,.stats-overview{grid-template-columns:1fr}.section-header{align-items:flex-start;flex-direction:column;gap:15px}.filter-controls{flex-direction:column;width:100%}.search-box input{width:200px}.search-results{width:300px}.user-analytics-header{align-items:flex-start;flex-direction:column}}.user-search-section.top-right{flex-shrink:0}.performance-page{background-color:#f8f9fc;font-family:Segoe UI,Tahoma,Geneva,Verdana,sans-serif;margin:0 auto;max-width:1200px;min-height:100vh;padding:20px}.performance-header{background:linear-gradient(135deg,#667eea,#764ba2);border-radius:15px;box-shadow:0 4px 20px #0000001a;color:#fff;margin-bottom:25px;padding:25px}.header-content{justify-content:space-between}.header-content,.header-row{align-items:center;display:flex}.header-row{gap:15px}.header-icon{font-size:40px}.header-text h1{font-size:32px;font-weight:700;margin:0 0 5px}.header-text p{font-size:16px;margin:0;opacity:.9}.refresh-button-header{align-items:center;background:#fff3;border:none;border-radius:8px;color:#fff;cursor:pointer;display:flex;font-size:14px;gap:8px;padding:10px 20px;transition:background .3s}.refresh-button-header:hover{background:#ffffff4d}.performance-empty{align-items:center;display:flex;flex-direction:column;justify-content:center;min-height:500px;padding:40px;text-align:center}.empty-icon{color:#6c757d;font-size:80px}.performance-empty h2{color:#333;font-size:28px;margin-bottom:10px}.performance-empty p{color:#666;line-height:1.6;margin-bottom:30px;max-width:500px}.refresh-button{background:#4e73df;display:flex;transition:background .3s}.refresh-button:hover{background:#2e59d9}.tooltip-overlay{align-items:center;background:#0000004d;bottom:0;display:flex;justify-content:center;left:0;padding:20px;position:fixed;right:0;top:0;z-index:1000}.tooltip-container{animation:tooltipAppear .3s ease;background:#fff;border-radius:12px;box-shadow:0 8px 30px #0003;max-width:400px;padding:25px;width:100%}@keyframes tooltipAppear{0%{opacity:0;transform:scale(.9)}to{opacity:1;transform:scale(1)}}.tooltip-header{align-items:center;display:flex;justify-content:space-between;margin-bottom:15px}.tooltip-title{color:#333;font-size:20px;font-weight:600;margin:0}.tooltip-close{background:none;border:none;color:#666;cursor:pointer;font-size:18px;padding:5px}.tooltip-value{color:#4e73df;font-size:32px;font-weight:700;margin-bottom:10px}.tooltip-subtitle{color:#666;font-size:16px;margin-bottom:20px}.tooltip-details{background:#f8f9fc;border-radius:8px;margin-bottom:15px;padding:15px}.tooltip-detail{color:#555;font-size:14px;line-height:1.5;margin:8px 0}.tooltip-footer{border-top:1px solid #eee;color:#888;font-size:12px;padding-top:15px;text-align:center}.performance-tabs{background:#fff;border-radius:10px;box-shadow:0 3px 10px #00000014;display:flex;justify-content:center;margin-bottom:30px;padding:5px}.performance-tab{background:none;border:none;border-radius:8px;color:#858796;cursor:pointer;flex:1 1;font-size:16px;padding:12px 24px;position:relative;text-align:center;transition:all .3s}.performance-tab:hover{background-color:#f8f9ff;color:#4e73df}.performance-tab.active{background-color:#f0f4ff;color:#4e73df;font-weight:600}.timeframe-selection{margin-bottom:30px}.timeframe-buttons{background:#fff;border-radius:10px;box-shadow:0 3px 10px #00000014;display:flex;gap:10px;padding:10px}.timeframe-btn{background:#f8f9fc;border:none;border-radius:8px;color:#666;cursor:pointer;flex:1 1;font-size:14px;font-weight:500;padding:12px;transition:all .3s}.timeframe-btn:hover{background:#e9ecef}.timeframe-btn.active{background:#4e73df;box-shadow:0 2px 5px #4e73df4d;color:#fff}.performance-insights{margin-bottom:30px}.performance-insights h2{color:#333;font-size:18px;font-weight:600;margin:0 0 20px}.insights-grid{grid-gap:20px;display:grid;gap:20px;grid-template-columns:repeat(auto-fit,minmax(200px,1fr))}.insight-card{align-items:center;background:#fff;border-radius:10px;box-shadow:0 3px 10px #00000014;display:flex;gap:15px;padding:20px;transition:transform .3s}.insight-card:hover{box-shadow:0 5px 15px #0000001a;transform:translateY(-3px)}.insight-icon{align-items:center;border-radius:10px;display:flex;font-size:24px;height:50px;justify-content:center;width:50px}.insight-icon.improvement{background:linear-gradient(135deg,#1cc88a20,#1cc88a40);color:#1cc88a}.insight-icon.streak{background:linear-gradient(135deg,#4e73df20,#4e73df40);color:#4e73df}.insight-icon.frequency{background:linear-gradient(135deg,#36b9cc20,#36b9cc40);color:#36b9cc}.insight-icon.last-quiz{background:linear-gradient(135deg,#f6c23e20,#f6c23e40);color:#f6c23e}.insight-content h3{color:#858796;font-size:14px;font-weight:500;margin:0 0 5px}.insight-value{font-size:20px;font-weight:700;margin:0}.insight-value.positive{color:#1cc88a}.insight-value.negative{color:#e74a3b}.performance-heatmap{margin-bottom:30px}.performance-heatmap h2{color:#333;font-size:18px;font-weight:600;margin:0 0 20px}.heatmap-container{background:#fff;border-radius:10px;box-shadow:0 3px 10px #00000014;padding:25px}.heatmap-item{align-items:center;display:flex;gap:15px;margin-bottom:15px}.heatmap-label{color:#333;font-size:14px;font-weight:500;width:120px}.heatmap-bar{background:#e9ecef;border-radius:10px;flex:1 1;height:20px;overflow:hidden}.heatmap-fill{border-radius:10px;height:100%;transition:width .5s ease}.heatmap-value{color:#333;font-size:14px;font-weight:600;text-align:right;width:50px}.subject-cards h2{color:#333;font-size:18px;font-weight:600;margin:0 0 16px}.cards-grid{grid-gap:16px;display:grid;gap:16px;grid-template-columns:repeat(auto-fit,minmax(220px,1fr))}.subject-card{background:#fff;border-radius:10px;box-shadow:0 3px 10px #0000000f;display:flex;flex-direction:column;gap:10px;min-height:140px;padding:12px;transition:transform .18s,box-shadow .18s}.subject-card:hover{box-shadow:0 8px 20px #00000014;transform:translateY(-4px)}.subject-card-header{align-items:center;display:flex;gap:12px}.subject-card-icon{align-items:center;background:linear-gradient(135deg,#4e73df22,#1cc88a22);border-radius:8px;color:#4e73df;display:flex;font-size:18px;height:44px;justify-content:center;width:44px}.subject-card-title{color:#222;font-size:15px;font-weight:700;margin:0}.subject-card-stats{display:flex;flex-direction:column;gap:8px}.subject-card-stat-row{align-items:center;display:flex;gap:8px;justify-content:space-between}.subject-card-label{color:#6c757d;font-size:13px;font-weight:600}.subject-card-value{color:#333;font-size:14px;font-weight:700}.subject-card-separator{background:#f1f3f5;border-radius:2px;height:1px;margin:4px 0}.subject-card-progress{background:#e9ecef;border-radius:999px;height:8px;margin-top:6px;overflow:hidden}.subject-card-progress-fill{background:linear-gradient(90deg,#4e73df,#1cc88a);height:100%;transition:width .6s ease}@media (max-width:768px){.cards-grid{gap:12px;grid-template-columns:repeat(auto-fit,minmax(180px,1fr))}.subject-card{min-height:120px;padding:10px}}.study-recommendations h2{color:#333;font-size:18px;font-weight:600;margin:0 0 20px}.recommendations-grid{grid-gap:20px;display:grid;gap:20px;grid-template-columns:repeat(auto-fit,minmax(300px,1fr))}.recommendation-card{background:#fff;border-radius:10px;box-shadow:0 3px 10px #00000014;display:flex;gap:20px;padding:25px;transition:transform .3s}.recommendation-card:hover{box-shadow:0 5px 15px #0000001a;transform:translateY(-3px)}.recommendation-icon{align-items:center;background:linear-gradient(135deg,#4e73df20,#4e73df40);border-radius:10px;color:#4e73df;display:flex;font-size:24px;height:50px;justify-content:center;width:50px}.recommendation-content h3{color:#333;font-size:16px;font-weight:600;margin:0 0 10px}.recommendation-content p{color:#666;font-size:14px;line-height:1.5;margin:0}.custom-tooltip{background:#fff;border:1px solid #e9ecef;border-radius:8px;box-shadow:0 3px 15px #00000026;padding:15px}.tooltip-label{color:#333;font-weight:600;margin:0 0 5px}.performance-loading{align-items:center;background:#fff;border-radius:10px;box-shadow:0 3px 10px #00000014;display:flex;flex-direction:column;justify-content:center;min-height:500px}.performance-spinner{animation:spin 1s linear infinite;border:4px solid #f3f3f3;border-radius:50%;border-top-color:#4e73df;height:40px;margin-bottom:15px;width:40px}@media (max-width:768px){.performance-page{padding:15px}.performance-header{padding:20px}.header-content{align-items:flex-start;flex-direction:column;gap:15px}.performance-tabs{flex-wrap:wrap}.performance-tab{flex-basis:calc(50% - 10px);flex-grow:1;flex-shrink:0;font-size:14px;margin:5px;padding:10px}.insights-grid,.recommendations-grid{grid-template-columns:1fr}.heatmap-item{align-items:flex-start;flex-direction:column;gap:8px}.heatmap-bar,.heatmap-label{width:100%}.heatmap-value{text-align:left;width:100%}}@media (max-width:480px){.header-text h1{font-size:24px}.header-text p{font-size:14px}.performance-tab{flex:1 0 100%}.timeframe-buttons{flex-direction:column}}.modern-table-section{margin-bottom:24px}.modern-table-section h2{color:#333;font-size:18px;margin-bottom:12px}.modern-table-scroll{background:#fff;border-radius:10px;box-shadow:0 3px 10px #0000000f;overflow-x:auto;padding:12px}.modern-table{border-collapse:collapse;min-width:720px;width:100%}.modern-table thead th{color:#6b7280;font-size:13px;font-weight:600;letter-spacing:.02em;padding:12px 16px;text-align:left}.modern-table tbody td{border-top:1px solid #eef2f6;color:#111827;font-size:14px;padding:12px 16px;vertical-align:middle}.modern-table tbody tr:hover{background:#fbfdff}.modern-badge{border-radius:999px;color:#fff;display:inline-block;font-size:12px;font-weight:700;padding:4px 10px}.grade-excellent{background:#10b981}.grade-very\-good{background:#34d399}.grade-good{background:#60a5fa}.grade-credit{background:#f59e0b}.grade-fail{background:#ef4444}.modern-table .subject-cell{color:#111827;font-weight:600}@media (max-width:900px){.modern-table{min-width:640px}}@media (max-width:640px){.modern-table{min-width:520px}.modern-table tbody td,.modern-table thead th{font-size:13px;padding:10px}}.premium-content-page{margin:0 auto;max-width:1200px;padding:20px}.premium-content-header{margin-bottom:30px;text-align:center}.premium-content-header h1{color:#2c3e50;margin-bottom:10px}.premium-content-header p{color:#7f8c8d;font-size:1.1rem}.admin-controls{margin-bottom:20px;text-align:center}.btn-upload{align-items:center;background:linear-gradient(135deg,#6a11cb,#2575fc);border:none;border-radius:8px;color:#fff;cursor:pointer;display:inline-flex;font-weight:600;gap:8px;padding:12px 20px;transition:all .3s ease}.btn-upload:hover{box-shadow:0 4px 12px #6a11cb4d;transform:translateY(-2px)}.upload-form-container{background:#fff;border-radius:12px;box-shadow:0 4px 15px #0000001a;margin-bottom:30px;padding:25px}.upload-form-container h2{color:#2c3e50;margin-bottom:20px}.upload-form{grid-gap:20px;display:grid;gap:20px;grid-template-columns:1fr 1fr}.form-group label{color:#34495e}.form-group input,.form-group select,.form-group textarea{border:1px solid #ddd;font-size:1rem}.form-group textarea{min-height:100px;resize:vertical}.btn-submit{background:#27ae60;border:none;border-radius:6px;color:#fff;cursor:pointer;font-weight:600;grid-column:span 2;padding:12px;transition:background .3s ease}.btn-submit:hover{background:#219653}.btn-submit:disabled{background:#95a5a6;cursor:not-allowed}.content-controls{display:flex;flex-wrap:wrap;gap:15px;margin-bottom:25px}.filter-box,.search-box{flex:1 1;min-width:250px;position:relative}.filter-box select,.search-box input{border:1px solid #ddd;border-radius:8px;font-size:1rem;padding:12px 12px 12px 40px;width:100%}.filter-icon,.search-icon{color:#7f8c8d;left:12px;position:absolute;top:50%;transform:translateY(-50%)}.content-grid{grid-gap:25px;display:grid;gap:25px;grid-template-columns:repeat(auto-fill,minmax(300px,1fr))}.content-card{border-radius:12px;box-shadow:0 4px 15px #0000001a;display:flex;flex-direction:column;overflow:hidden;transition:transform .3s ease,box-shadow .3s ease}.content-card:hover{box-shadow:0 8px 25px #00000026;transform:translateY(-5px)}.card-header{background:#f8f9fa;justify-content:space-between;padding:15px}.card-header,.category-badge{align-items:center;display:flex}.category-badge{color:#7f8c8d;font-size:.9rem;gap:8px}.btn-delete{background:none;border:none;border-radius:4px;color:#e74c3c;cursor:pointer;padding:5px;transition:background .3s ease}.btn-delete:hover{background:#e74c3c1a}.card-thumbnail{height:180px;overflow:hidden}.card-thumbnail img{height:100%;object-fit:cover;width:100%}.thumbnail-placeholder{align-items:center;background:#ecf0f1;color:#7f8c8d;display:flex;font-size:2rem;height:100%;justify-content:center}.card-content{flex-grow:1}.card-content h3{color:#2c3e50;font-size:1.2rem;margin:0 0 10px}.card-content p{color:#7f8c8d;line-height:1.5;margin-bottom:15px}.file-info{color:#95a5a6;font-size:.9rem;margin-bottom:15px}.file-info,.upload-info{display:flex;justify-content:space-between}.upload-info{border-top:1px solid #ecf0f1;color:#bdc3c7;font-size:.8rem;padding-top:15px}.card-actions{padding:0 20px 20px}.btn-download{background:#3498db;border-radius:6px;color:#fff;display:block;font-weight:600;padding:10px;text-align:center;text-decoration:none;transition:background .3s ease}.btn-download:hover{background:#2980b9}.empty-icon{font-size:3rem}.error-message,.success-message{align-items:center;border-radius:8px;display:flex;justify-content:space-between;margin-bottom:20px;padding:15px}.error-message{background:#ffeaea;color:#e74c3c}.success-message{background:#eaffea;color:#27ae60}.error-message button,.success-message button{background:none;border:none;color:inherit;cursor:pointer;font-weight:700}.loading-container{padding:60px 20px}.spinner{border:4px solid #f3f3f3;border-top-color:#3498db;height:40px;margin:0 auto 20px;width:40px}@media (max-width:768px){.upload-form{grid-template-columns:1fr}.btn-submit{grid-column:1}.content-grid{grid-template-columns:1fr}.content-controls{flex-direction:column}.filter-box,.search-box{min-width:100%}}.profile-container{background:var(--bg-color);color:var(--text-color);font-family:var(--font-family);margin:0 auto;max-width:1000px;padding:20px}.profile-header{align-items:center;display:flex;gap:16px;justify-content:space-between;margin-bottom:30px;padding:0 8px}.profile-header-left{align-items:flex-start;display:flex;flex-direction:column}.profile-header-actions{align-items:center;display:flex;gap:10px}.premium-badge{background:linear-gradient(90deg,#f6d365,#fda085);border-radius:999px;box-shadow:0 2px 6px #00000014;color:#1f2937;font-size:.85rem;font-weight:700;padding:6px 10px}.action-btn{background:#667eea;background:var(--primary-color,#667eea);border:none;border-radius:8px;color:#fff;cursor:pointer;font-weight:600;padding:8px 12px;transition:transform .08s ease,box-shadow .08s ease}.action-btn:hover{box-shadow:0 6px 12px #6677ea1f;transform:translateY(-1px)}.action-btn.muted{background:#edf2f7;color:#4a5568}.small-btn{background:#eef2ff;border:none;border-radius:6px;color:#2a2e6f;cursor:pointer;font-size:.9rem;margin-left:10px;padding:6px 8px}.small-btn.muted{background:#0000;color:#718096}.field-row{align-items:center;display:flex;gap:10px}.profile-header h1{color:var(--secondary-color);font-size:2rem;font-weight:700;margin-bottom:10px}.profile-header p{color:#718096;font-size:1rem}.profile-error,.profile-loading{color:#718096;font-size:1.125rem;padding:40px;text-align:center}.profile-content{display:flex;justify-content:center}.profile-card{background:#fff;border-radius:12px;box-shadow:0 4px 6px #0000001a;max-width:800px;overflow:hidden;width:100%}.profile-image-section{background:linear-gradient(135deg,#667eea,#764ba2);padding:30px;text-align:center}.profile-image-container{display:inline-block;position:relative}.profile-image{object-fit:cover}.profile-image,.profile-image-placeholder{border:4px solid #fff;border-radius:50%;box-shadow:0 4px 6px #0000001a;height:150px;width:150px}.profile-image-placeholder{align-items:center;background:#fff3;color:#fff;display:flex;justify-content:center}.image-upload-label{bottom:0;cursor:pointer;position:absolute;right:0}.image-upload-label input{display:none}.image-upload-button{align-items:center;background:#fff;border-radius:50%;box-shadow:0 2px 4px #0003;color:#050919;display:flex;height:40px;justify-content:center;transition:all .3s ease;width:40px}.image-upload-button:hover{transform:scale(1.1)}.image-upload-button:active{transform:scale(.95)}.profile-details{background:#fff;padding:30px}.profile-detail-group{margin-bottom:30px}.profile-detail-group h2{border-bottom:1px solid #e2e8f0;color:var(--secondary-color);font-size:1.25rem;margin-bottom:20px;padding-bottom:10px}.detail-item{align-items:flex-start;display:flex;margin-bottom:20px}.detail-icon{align-items:center;background:#f7fafc;border-radius:8px;color:#667eea;display:flex;height:40px;justify-content:center;margin-right:15px;width:40px}.detail-content{flex:1 1}.detail-content label{color:#4a5568;display:block;font-size:.875rem;font-weight:600;margin-bottom:5px}.detail-content p{color:var(--secondary-color);font-size:1rem;margin:0}.profile-message{border-radius:8px;bottom:20px;box-shadow:0 4px 6px #0000001a;color:#fff;font-weight:500;padding:12px 20px;position:fixed;right:20px;z-index:1000}.profile-message.success{background:var(--primary-color)}.profile-message.error{background:#e53e3e}@media (max-width:768px){.profile-container{padding:15px}.profile-card{border-radius:8px}.profile-image-section{padding:20px}.profile-image,.profile-image-placeholder{height:120px;width:120px}.profile-details{padding:20px}.detail-item{flex-direction:column}.detail-icon{margin-bottom:10px;margin-right:0}}.user-avatar-top{align-items:center;background:linear-gradient(135deg,#667eea,#764ba2);border-radius:50%;color:#fff;display:flex;font-size:14px;font-weight:600;height:40px;justify-content:center;margin-right:10px;position:relative;width:40px}.profile-avatar-img{border-radius:50%;height:100%;object-fit:cover;width:100%}.role-badge-top{background:#fff;border-radius:50%;bottom:-2px;box-shadow:0 2px 4px #0000001a;color:#667eea;font-size:10px;padding:2px;position:absolute;right:-2px}.role-badge-top.premium{color:#fbbf24}.subscribers-management{margin:0 auto;max-width:1400px;padding:10px}.subscribers-header{margin-bottom:10px}.subscribers-header h2{color:#1a1a1a;font-size:28px;font-weight:500;margin:0 0 8px}.subscribers-header p{color:#666;font-size:14px;margin:0}.search-controls{flex-wrap:wrap;gap:16px;margin-bottom:10px}.search-box{flex:1 1;max-width:400px;min-width:300px;position:relative}.search-input{background:#fff;border:2px solid #e1e5e9;border-radius:12px;padding:12px 20px 12px 16px;transition:border-color .2s ease;width:100%}.search-input:focus{box-shadow:0 0 0 3px #007bff1a}.search-icon{color:#666;pointer-events:none;position:absolute;right:16px}.status-filter{background:#fff;border:2px solid #e1e5e9;border-radius:12px;font-size:14px;min-width:150px;padding:12px 16px}.clear-filters-btn{background:#6c757d;border:none;border-radius:12px;color:#fff;font-size:14px;padding:12px 20px;transition:background-color .2s ease}.clear-filters-btn:hover{background:#5a6268}.results-info{border-bottom:1px solid #e1e5e9;color:#666;font-size:14px;margin-bottom:20px;padding:12px 0}.active-filters{color:#007bff;font-weight:500}.users-table-container{background:#fff;border:1px solid #e1e5e9;border-radius:16px;box-shadow:0 4px 20px #00000014;overflow:hidden}.table-header{align-items:center;background:#f8f9fa;border-bottom:1px solid #e1e5e9;color:#1a1a1a;display:grid;font-weight:500;grid-template-columns:2fr repeat(4,1fr);padding:20px}.user-column{font-size:16px}.class-column{color:#666;font-size:14px;text-align:center}.table-row{align-items:center;border-bottom:1px solid #f0f0f0;display:grid;grid-template-columns:2fr repeat(4,1fr);padding:20px;transition:background-color .2s ease}.table-row:hover{background-color:#fafafa}.table-row:last-child{border-bottom:none}.user-info{align-items:flex-start;display:flex;gap:16px;justify-content:space-between}.user-details{flex:1 1}.user-name{color:#1a1a1a;font-size:15px;font-weight:600;margin-bottom:4px}.user-email,.user-phone{color:#666;font-size:13px;margin-bottom:2px}.user-status{flex-shrink:0}.status-badge{letter-spacing:.5px;padding:6px 12px;text-transform:uppercase}.status-badge.premium{background:linear-gradient(135deg,gold,#ffed4e);color:#856404}.status-badge.regular{background:linear-gradient(135deg,#e3f2fd,#bbdefb);color:#1976d2}.class-checkbox{align-items:center;display:flex;height:100%;justify-content:center}.checkbox-container{cursor:pointer;display:block;height:24px;position:relative;width:24px}.checkbox-container input{cursor:pointer;height:0;opacity:0;position:absolute;width:0}.checkmark{background-color:#fff;border:2px solid #ddd;border-radius:6px;height:24px;left:0;position:absolute;top:0;transition:all .2s ease;width:24px}.checkbox-container input:checked~.checkmark{background-color:#007bff;border-color:#007bff}.checkmark:after{border:solid #fff;border-width:0 2px 2px 0;content:"";display:none;height:10px;left:7px;position:absolute;top:3px;transform:rotate(45deg);width:5px}.checkbox-container input:checked~.checkmark:after{display:block}.no-results{color:#666;font-size:16px;padding:60px 20px}.message{background:linear-gradient(135deg,#d4edda,#c3e6cb);border:1px solid #c3e6cb;border-radius:12px;color:#155724;font-weight:500;margin-bottom:24px;padding:16px}.loading{color:#666;font-size:16px}@media (max-width:1024px){.users-table-container{overflow-x:auto}.table-header,.table-row{min-width:800px}.search-controls{align-items:stretch;flex-direction:column}.search-box{max-width:none}}@media (max-width:768px){.subscribers-management{padding:16px}.search-controls{gap:12px}.clear-filters-btn,.search-input,.status-filter{padding:10px 14px}}.user-management{margin:0 auto;max-width:1200px;padding:20px}.controls-container{align-items:center;display:flex;flex-wrap:wrap;gap:15px;justify-content:space-between;margin-bottom:20px}.filter-controls{display:flex;gap:10px}.filter-controls button{background:#f5f5f5;border:1px solid #ddd;border-radius:4px;cursor:pointer;padding:8px 16px;transition:all .3s ease}.filter-controls button:hover{background:#e9e9e9}.filter-controls button.active{background:#007bff;border-color:#007bff;color:#fff}.search-input{border:1px solid #ddd;border-radius:4px;font-size:14px;min-width:200px;padding:8px 12px}.search-input:focus{border-color:#007bff;box-shadow:0 0 0 2px #007bff40;outline:none}.role-badge{border-radius:12px;display:inline-block;font-size:12px;font-weight:500;min-width:120px;padding:6px 12px;text-align:center}.role-0{background:#dc3545;color:#fff}.role-1{background:#6c757d;color:#fff}.role-2{background:#ffc107;color:#212529}.role-null,.role-undefined,.role-unknown{background:#6c757d;color:#fff}.users-table-container{border:1px solid #e0e0e0;border-radius:8px;margin-top:20px;overflow-x:auto}.users-table{border-collapse:collapse;width:100%}.users-table td,.users-table th{border-bottom:1px solid #e0e0e0;padding:12px 15px;text-align:left}.users-table th{background-color:#f8f9fa;font-weight:600;position:-webkit-sticky;position:sticky;top:0}.users-table tr:hover{background-color:#f5f5f5}.edit-btn{background-color:#007bff;border:none;border-radius:4px;color:#fff;cursor:pointer;padding:6px 12px;transition:background-color .3s}.edit-btn:hover{background-color:#0056b3}.edit-btn:disabled{background-color:#6c757d;cursor:not-allowed}.no-results{color:#6c757d;font-style:italic;padding:20px;text-align:center}.modal-overlay{background-color:#00000080}.modal{background:#fff;border-radius:8px;box-shadow:0 4px 20px #00000026;max-width:90%;padding:24px;width:400px}.modal h3{color:#333;margin-top:0}.form-group,.modal h3{margin-bottom:20px}.form-group label{color:#555;display:block;margin-bottom:8px}.form-group select{background-color:#fff;border:1px solid #ddd;border-radius:4px;font-size:14px;padding:10px;width:100%}.form-group select:focus{border-color:#007bff;box-shadow:0 0 0 2px #007bff40;outline:none}.modal-actions{display:flex;gap:10px;justify-content:flex-end}.modal-actions button{border:none;border-radius:4px;cursor:pointer;font-weight:500;padding:10px 20px;transition:background-color .3s}.modal-actions button[type=submit]{background-color:#007bff;color:#fff}.modal-actions button[type=submit]:hover{background-color:#0056b3}.modal-actions button[type=button]{background-color:#6c757d;color:#fff}.modal-actions button[type=button]:hover{background-color:#5a6268}.error-message{background-color:#f8d7da;border:1px solid #f5c6cb;border-radius:4px;color:#dc3545;margin-bottom:15px;padding:10px}.success-message{background-color:#d4edda;border:1px solid #c3e6cb;border-radius:4px;color:#155724;margin-bottom:15px;padding:10px}.loading{color:#6c757d;font-size:18px}@media (max-width:768px){.controls-container{align-items:stretch;flex-direction:column}.filter-controls{flex-wrap:wrap;justify-content:center}.search-controls{flex-direction:column;gap:8px}.role-filter-select,.search-input{min-width:auto;width:100%}.users-table{font-size:14px}.users-table td,.users-table th{padding:8px 10px}}.role-filter-select{background:#fff;border:1px solid #ddd;border-radius:4px;font-size:14px;min-width:150px;padding:8px 12px}.role-filter-select:focus{border-color:#007bff;box-shadow:0 0 0 2px #007bff40;outline:none}.clear-filters-btn{background:#fff;border:1px solid #dc3545;border-radius:4px;color:#dc3545;cursor:pointer;padding:8px 12px;transition:all .3s ease}.clear-filters-btn:hover{background:#dc3545;color:#fff}.filter-info{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:15px}.filter-tag{align-items:center;background:#e9ecef;border-radius:12px;display:inline-flex;font-size:12px;gap:4px;padding:4px 8px}.filter-tag button{align-items:center;background:none;border:none;border-radius:50%;color:#6c757d;cursor:pointer;display:flex;font-size:14px;height:16px;justify-content:center;padding:0;width:16px}.filter-tag button:hover{background:#6c757d;color:#fff}.search-controls{align-items:center;display:flex;gap:10px}.user-management-header{align-items:center;border-bottom:1px solid #e1e5e9;display:flex;justify-content:space-between;margin-bottom:20px;padding-bottom:15px}.user-management-header h2{color:#333;margin:0}.tabs{display:flex;gap:10px}.tab-button{background:#f8f9fa;border:1px solid #e1e5e9;border-radius:4px;cursor:pointer;font-weight:500;padding:10px 20px;transition:all .3s ease}.tab-button:hover{background:#e9ecef}.tab-button.active{background:#4e73df;border-color:#4e73df;color:#fff}.analytics-page{background-color:#f8f9fc;min-height:100vh;padding:20px}.analytics-header{margin-bottom:25px}.analytics-header h1{color:#333;font-size:28px;margin:0 0 10px}.analytics-header p{color:#666;margin:0}.controls-row{display:flex;flex-wrap:wrap;gap:15px;justify-content:space-between;margin-bottom:25px}.metric-selector,.time-range-selector{display:flex;flex-wrap:wrap;gap:10px}.metric-selector button,.time-range-selector button{align-items:center;background:#fff;border:1px solid #ddd;border-radius:6px;cursor:pointer;display:flex;font-size:14px;gap:5px;padding:10px 15px;transition:all .3s}.metric-selector button:hover,.time-range-selector button:hover{background-color:#f8f9fc}.metric-selector button.active,.time-range-selector button.active{background-color:#4e73df;border-color:#4e73df;color:#fff}.charts-grid{grid-gap:25px;display:grid;gap:25px;grid-template-columns:repeat(auto-fit,minmax(500px,1fr))}.chart-card{background:#fff;border-radius:10px;box-shadow:0 3px 10px #00000014;padding:20px}.chart-card h2{align-items:center;color:#333;display:flex;font-size:18px;gap:8px;margin:0 0 20px}.chart-card.full-width,.main-chart{grid-column:1/-1}@media (max-width:1200px){.charts-grid{grid-template-columns:1fr}}@media (max-width:768px){.analytics-page{padding:15px}.controls-row{flex-direction:column}.metric-selector,.time-range-selector{justify-content:center}.chart-card{padding:15px}.charts-grid{grid-template-columns:1fr}}@media (max-width:576px){.metric-selector,.time-range-selector{flex-direction:column;width:100%}.metric-selector button,.time-range-selector button{justify-content:center;width:100%}}.message-page{background:var(--bg-color);color:var(--text-color);font-family:var(--font-family);margin:0 auto;max-width:1200px;padding:20px}.message-header{align-items:center;display:flex;justify-content:space-between;margin-bottom:20px}.notifications-badge{position:relative}.badge{align-items:center;background-color:#e53e3e;border-radius:50%;color:#fff;display:flex;font-size:.75rem;height:20px;justify-content:center;position:absolute;right:-10px;top:-10px;width:20px}.notifications-panel{background:#f8f9fa;border-radius:8px;margin-bottom:20px;max-height:200px;overflow-y:auto;padding:15px}.notification{background:#fff;border-left:4px solid var(--primary-color);border-radius:4px;cursor:pointer;margin-bottom:10px;padding:10px;position:relative}.notification.unread{background:#fff3f3;border-left-color:#e53e3e}.notification h4{font-size:.875rem;margin:0 0 5px}.notification p{color:#6c757d;font-size:.8125rem;margin:0}.notification-time{color:#858796;font-size:.75rem}.unread-dot{background-color:#e53e3e;border-radius:50%;height:8px;position:absolute;right:10px;top:10px;width:8px}.conversation-panel{background:#fff;border-radius:8px;box-shadow:0 2px 5px #0000001a;overflow:hidden}.messages-container{display:flex;flex-direction:column;height:400px;overflow-y:auto;padding:20px}.no-messages{align-items:center;color:#858796;display:flex;height:100%;justify-content:center}.message{margin-bottom:15px}.message-content{border-radius:18px;padding:10px 15px}.message.sent .message-content{background-color:var(--primary-color);color:#fff}.message.received .message-content{background-color:#f8f9fa;color:#2d3748}.message-sender{font-size:.75rem;font-weight:700;margin-bottom:5px}.message-time{font-size:.6875rem;margin-top:5px;opacity:.8}.message-input-form{border-top:1px solid #e3e6f0;padding:15px}.input-group{display:flex;gap:10px}.input-group input{border:1px solid #d1d3e2;border-radius:4px;flex:1 1;padding:10px 15px}.input-group button{background-color:var(--primary-color);border:none;border-radius:4px;color:#fff;cursor:pointer;padding:10px 20px}.input-group button:disabled{background-color:#b7b7b7;cursor:not-allowed}.loading{color:#858796}.noticeboard-title{color:#2d3748;font-size:2rem;font-weight:700;letter-spacing:1px;margin-bottom:1.5rem;text-align:center}.noticeboard-admin-container{margin:0 auto;max-width:1200px;padding:20px}.admin-header{text-align:center}.admin-header h1{align-items:center;color:#2d3748;display:flex;gap:10px;justify-content:center;margin-bottom:10px}.header-icon{color:#667eea}.admin-header p{color:#718096;font-size:16px;margin-top:-10px}.notices-header{border-bottom:1px solid #e2e8f0;display:block;margin-bottom:10px;padding-bottom:15px}.notices-header h2{color:#2d3748;margin:0}.btn{align-items:center;border:none;border-radius:6px;cursor:pointer;display:inline-flex;font-size:14px;font-weight:500;gap:8px;padding:10px 16px;transition:all .2s}.btn-primary{background:linear-gradient(90deg,#667eea,#764ba2);color:#fff}.btn-primary:hover{box-shadow:0 4px 6px #667eea4d;transform:translateY(-2px)}.btn-secondary{background-color:#e2e8f0;color:#4a5568}.btn-secondary:hover{background-color:#cbd5e0}.btn-icon{align-items:center;background-color:#f7fafc;border:none;border-radius:6px;color:#4a5568;cursor:pointer;display:inline-flex;height:36px;justify-content:center;transition:all .2s;width:36px}.btn-icon:hover{background-color:#edf2f7;transform:translateY(-1px)}.btn-icon.danger{color:#e53e3e}.btn-icon.danger:hover{background-color:#fed7d7}.notice-form-container{background:#fff;border-radius:10px;box-shadow:0 4px 6px #0000000d;margin-bottom:30px;padding:20px}.form-header{align-items:center;display:flex;justify-content:space-between;margin-bottom:20px}.form-header h3{color:#2d3748;margin:0}.close-btn{background:none;border:none;border-radius:4px;color:#718096;cursor:pointer;font-size:18px;padding:5px}.close-btn:hover{background-color:#f7fafc;color:#4a5568}.notice-form{gap:20px}.form-group,.notice-form{display:flex;flex-direction:column}.form-group{gap:8px}.form-group label{color:#4a5568;font-size:14px;font-weight:600}.form-group input,.form-group select,.form-group textarea{border:1px solid #e2e8f0;border-radius:6px;font-size:14px;padding:12px;transition:border-color .2s}.form-group input:focus,.form-group select:focus,.form-group textarea:focus{border-color:#667eea;box-shadow:0 0 0 3px #667eea26;outline:none}.form-row{display:flex;gap:20px}.form-row .form-group{flex:1 1}.checkbox-group{margin-top:25px}.checkbox-label{align-items:center;cursor:pointer;display:flex;font-weight:400;gap:10px}.checkbox-label input[type=checkbox]{display:none}.checkmark{border:2px solid #cbd5e0;border-radius:4px;display:inline-block;height:18px;position:relative;transition:all .2s;width:18px}.checkbox-label input[type=checkbox]:checked+.checkmark{background-color:#667eea;border-color:#667eea}.checkbox-label input[type=checkbox]:checked+.checkmark:after{border:solid #fff;border-width:0 2px 2px 0;content:"";height:9px;left:4px;position:absolute;top:1px;transform:rotate(45deg);width:5px}.form-actions{display:flex;gap:10px;justify-content:flex-end;margin-top:10px}.notices-list{display:flex;flex-direction:column;gap:15px}.notice-item{background:#fff;border-radius:10px;box-shadow:0 2px 4px #0000000d;display:flex;overflow:hidden;transition:transform .2s,box-shadow .2s}.notice-item:hover{box-shadow:0 4px 8px #0000001a;transform:translateY(-2px)}.notice-item.inactive{background-color:#f7fafc;opacity:.7}.notice-item.priority-high{border-left:4px solid #e53e3e}.notice-item.priority-medium{border-left:4px solid #d69e2e}.notice-item.priority-normal{border-left:4px solid #667eea}.notice-content{flex:1 1;padding:20px}.notice-header{align-items:center;display:flex;flex-wrap:wrap;gap:10px;margin-bottom:10px}.notice-title{color:#2d3748;font-size:18px;margin:0}.status-badge{border-radius:20px;font-size:12px;font-weight:600;padding:4px 8px}.status-badge.active{background-color:#c6f6d5;color:#2f855a}.status-badge.inactive{background-color:#fed7d7;color:#c53030}.priority-badge{border-radius:20px;font-size:12px;font-weight:600;padding:4px 8px;text-transform:capitalize}.priority-badge.priority-high{background-color:#fed7d7;color:#c53030}.priority-badge.priority-medium{background-color:#fefcbf;color:#744210}.priority-badge.priority-normal{background-color:#bee3f8;color:#2c5282}.notice-text{color:#4a5568;line-height:1.5;margin:0 0 15px;white-space:pre-wrap}.notice-meta{display:flex;flex-wrap:wrap;gap:15px}.notice-author,.notice-date{color:#718096;font-size:12px}.notice-actions{background-color:#f7fafc;border-left:1px solid #e2e8f0;display:flex;flex-direction:column;gap:10px;padding:15px}.empty-state{color:#718096;padding:40px 20px}.empty-icon{margin-bottom:15px;opacity:.5}.empty-state h3{color:#4a5568;margin:0 0 10px}.loading{color:#718096;padding:40px;text-align:center}@media (max-width:768px){.notices-header{align-items:flex-start}.form-row,.notices-header{flex-direction:column;gap:15px}.notice-item{flex-direction:column}.notice-actions{border-left:none;border-top:1px solid #e2e8f0;flex-direction:row;justify-content:flex-end}.notice-meta{flex-direction:column;gap:5px}}.whatsapp-container{background-color:#f0f0f0;display:flex;height:100vh}.whatsapp-sidebar{background-color:#fff;border-right:1px solid #e0e0e0;display:flex;flex-direction:column;position:relative;width:30%}.whatsapp-sidebar.hidden{display:none}.whatsapp-header{align-items:center;background-color:#f0f0f0;border-bottom:1px solid #e0e0e0;display:flex;justify-content:space-between;padding:10px 15px}.whatsapp-header-actions{align-items:center;display:flex;gap:15px}.whatsapp-avatar img{border-radius:50%;height:40px;margin-right:10px;width:40px}.whatsapp-search{align-items:center;background-color:#fff;border-radius:20px;display:flex;flex:1 1;padding:8px 15px}.whatsapp-search input{border:none;flex:1 1;font-size:14px;margin-left:8px;outline:none}.notification-icon{color:#54656f;cursor:pointer;font-size:18px;padding:8px;position:relative;transition:color .2s}.notification-icon:hover{color:#128c7e}.notification-badge{align-items:center;background-color:#25d366;border-radius:50%;color:#fff;display:flex;font-size:11px;font-weight:700;height:18px;justify-content:center;position:absolute;right:-5px;top:-5px;width:18px}.notifications-dropdown{background:#fff;border:1px solid #e0e0e0;border-radius:8px;box-shadow:0 2px 10px #00000026;display:flex;flex-direction:column;left:auto;max-height:300px;overflow:hidden;position:absolute;right:0;top:calc(100% + 5px);width:300px;z-index:1000}.notifications-header{align-items:center;border-bottom:1px solid #f0f0f0;display:flex;flex-shrink:0;justify-content:space-between;padding:12px 15px}.notifications-header h3{color:#333;font-size:16px;font-weight:600;margin:0}.notifications-header span{color:#25d366;font-size:12px;font-weight:700}.notifications-list{flex:1 1;overflow-y:auto;scrollbar-color:#25d366 #f0f0f0;scrollbar-width:thin}.notifications-list::-webkit-scrollbar{width:6px}.notifications-list::-webkit-scrollbar-track{background:#f0f0f0;border-radius:3px}.notifications-list::-webkit-scrollbar-thumb{background:#25d366;border-radius:3px}.notifications-list::-webkit-scrollbar-thumb:hover{background:#128c7e}.notification-item{align-items:center;border-bottom:1px solid #f5f5f5;cursor:pointer;display:flex;padding:12px 15px;transition:background-color .2s}.notification-item:hover{background-color:#f5f5f5}.notification-avatar{align-items:center;background-color:#25d366;border-radius:50%;color:#fff;display:flex;flex-shrink:0;font-weight:700;height:40px;justify-content:center;margin-right:12px;width:40px}.notification-content{flex:1 1;overflow:hidden}.notification-name{color:#333;font-weight:700;margin-bottom:4px}.notification-preview{color:#667781;font-size:13px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.no-notifications{color:#999;font-size:14px;padding:20px;text-align:center}.conversations-list{flex:1 1;overflow-y:auto;scrollbar-color:#25d366 #f0f0f0;scrollbar-width:thin}.conversations-list::-webkit-scrollbar{width:6px}.conversations-list::-webkit-scrollbar-track{background:#f0f0f0;border-radius:3px}.conversations-list::-webkit-scrollbar-thumb{background:#25d366;border-radius:3px}.conversations-list::-webkit-scrollbar-thumb:hover{background:#128c7e}.conversation-item{align-items:center;border-bottom:1px solid #f0f0f0;cursor:pointer;display:flex;padding:12px 15px;transition:background-color .2s}.conversation-item:hover{background-color:#f5f5f5}.conversation-item.selected{background-color:#e8f4f8}.conversation-item.unread{background-color:#f0f8ff}.conversation-avatar{align-items:center;background-color:#25d366;border-radius:50%;color:#fff;display:flex;flex-shrink:0;font-size:18px;font-weight:700;height:50px;justify-content:center;margin-right:15px;width:50px}.conversation-info{flex:1 1;min-width:0}.conversation-name{color:#333;font-size:16px;font-weight:700;margin-bottom:4px}.conversation-preview{color:#667781;font-size:14px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.conversation-meta{align-items:flex-end;display:flex;flex-direction:column;margin-left:10px}.conversation-time{color:#999;font-size:12px;margin-bottom:6px}.unread-badge{background-color:#25d366;border-radius:50%;height:18px;width:18px}.whatsapp-chat{background-color:#e5ddd5;background-image:url("data:image/svg+xml;charset=utf-8,%3Csvg width='100' height='100' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath d='M11 18a7 7 0 1 0 0-14 7 7 0 0 0 0 14zm48 25a7 7 0 1 0 0-14 7 7 0 0 0 0 14zm-43-7a3 3 0 1 0 0-6 3 3 0 0 0 0 6zm63 31a3 3 0 1 0 0-6 3 3 0 0 0 0 6zM34 90a3 3 0 1 0 0-6 3 3 0 0 0 0 6zm56-76a3 3 0 1 0 0-6 3 3 0 0 0 0 6zM12 86c2.21 0 4-1.79 4-4s-1.79-4-4-4-4 1.79-4 4 1.79 4 4 4zm28-65c2.21 0 4-1.79 4-4s-1.79-4-4-4-4 1.79-4 4 1.79 4 4 4zm23-11c2.76 0 5-2.24 5-5s-2.24-5-5-5-5 2.24-5 5 2.24 5 5 5zm-6 60c2.21 0 4-1.79 4-4s-1.79-4-4-4-4 1.79-4 4 1.79 4 4 4zm29 22c2.76 0 5-2.24 5-5s-2.24-5-5-5-5 2.24-5 5 2.24 5 5 5zM32 63c2.76 0 5-2.24 5-5s-2.24-5-5-5-5 2.24-5 5 2.24 5 5 5zm57-13c2.76 0 5-2.24 5-5' fill='%23aaa' fill-opacity='.1' fill-rule='evenodd'/%3E%3C/svg%3E");display:flex;flex:1 1;flex-direction:column}.whatsapp-chat.active{display:flex}.chat-header{background-color:#f0f0f0;border-bottom:1px solid #e0e0e0;padding:12px 20px}.chat-header,.chat-header-info{align-items:center;display:flex}.chat-header-info{flex:1 1}.back-button{background:none;color:#54656f;font-size:18px;margin-right:15px;transition:color .2s}.back-button:hover{color:#128c7e}.chat-avatar{align-items:center;background-color:#25d366;border-radius:50%;color:#fff;display:flex;font-size:18px;font-weight:700;height:45px;justify-content:center;margin-right:15px;width:45px}.chat-user-info{flex:1 1}.chat-user-name{color:#333;font-size:16px;font-weight:700}.chat-user-status{color:#667781;font-size:13px}.chat-messages{display:flex;flex:1 1;flex-direction:column;overflow-y:auto;padding:20px;scrollbar-color:#25d366 #f0f0f0;scrollbar-width:thin}.chat-messages::-webkit-scrollbar{width:6px}.chat-messages::-webkit-scrollbar-track{background:#f0f0f0;border-radius:3px}.chat-messages::-webkit-scrollbar-thumb{background:#25d366;border-radius:3px}.chat-messages::-webkit-scrollbar-thumb:hover{background:#128c7e}.date-group{margin-bottom:20px}.date-divider{color:#999;font-size:13px;margin:15px 0;position:relative;text-align:center}.date-divider:before{background-color:#e0e0e0;content:"";height:1px;left:0;position:absolute;right:0;top:50%;z-index:1}.date-divider span{background-color:#e5ddd5;border-radius:15px;padding:5px 12px;position:relative;z-index:2}.message{display:flex;margin-bottom:12px;padding:5px 0}.message.sent{justify-content:flex-end}.message.received{justify-content:flex-start}.message-content{border-radius:8px;box-shadow:0 1px 1px #0000001a;max-width:70%;padding:8px 12px;position:relative}.message.sent .message-content{background-color:#dcf8c6;border-top-right-radius:0}.message.received .message-content{background-color:#fff;border-top-left-radius:0}.message-text{word-wrap:break-word;line-height:1.4;margin-bottom:4px}.message-time{color:#667781;font-size:11px;margin-top:4px;text-align:right}.chat-input-container{align-items:center;background-color:#f0f0f0;border-top:1px solid #e0e0e0;display:flex;padding:15px}.chat-input-actions{display:flex;margin-right:15px}.input-action{color:#54656f;cursor:pointer;font-size:18px;margin-right:15px;transition:color .2s}.input-action:hover{color:#128c7e}.chat-input{flex:1 1}.chat-input input{background-color:#fff;border:none;border-radius:20px;font-size:15px;outline:none;padding:12px 15px;width:100%}.chat-input input:focus{box-shadow:0 0 0 2px #25d36633}.chat-send{margin-left:15px}.send-button{background-color:#25d366;border:none;border-radius:20px;color:#fff;cursor:pointer;font-weight:700;padding:12px 20px;transition:background-color .2s,transform .2s}.send-button:hover:not(:disabled){background-color:#128c7e;transform:translateY(-1px)}.send-button:disabled{cursor:not-allowed;opacity:.7}.no-conversation-selected{align-items:center;color:#667781;display:flex;flex-direction:column;height:100%;justify-content:center;padding:20px;text-align:center}.whatsapp-logo{margin-bottom:25px}.no-messages{color:#667781;margin-top:50px;padding:20px;text-align:center}@media (max-width:768px){.whatsapp-sidebar{width:100%}.whatsapp-chat{display:none;width:100%}.whatsapp-chat.active{display:flex}.notifications-dropdown{left:auto;right:15px;width:260px}.chat-input-container{padding:10px}.chat-input input{padding:10px 12px}.send-button{padding:10px 15px}}@media (max-width:576px){.notifications-dropdown{right:10px;width:240px}.notification-item{padding:10px 12px}.notification-avatar{font-size:14px;height:36px;width:36px}.notification-name{font-size:14px}.notification-preview{font-size:12px}}.back-button:focus,.input-action:focus,.notification-icon:focus,.send-button:focus{outline:2px solid #25d366;outline-offset:2px}@media (prefers-contrast:high){.message.received .message-content,.message.sent .message-content{border:1px solid #000}.notifications-dropdown{border:2px solid #000}}@media (prefers-reduced-motion:reduce){.conversation-item,.notification-item,.send-button{transition:none}}.quiz-types-page{background:#f8f9fc;min-height:100vh}.quiz-types-header{margin-bottom:25px}.refresh-btn{align-items:center;background:#fff3;border:none;border-radius:50%;color:#fff;cursor:pointer;display:flex;height:44px;justify-content:center;transition:all .3s ease;width:44px}.refresh-btn:hover{background:#ffffff4d;transform:rotate(180deg)}.refresh-btn:disabled{cursor:not-allowed;opacity:.5}.spinning{animation:spin 1s linear infinite}.header-main{align-items:center}.header-icon-large{align-items:center;background:#fff3;border-radius:50%;color:#fff;display:flex;font-size:28px;height:60px;justify-content:center;width:60px}.page-content{margin:0 auto;max-width:1200px;padding:0 20px}.info-section{background:#fff;border-radius:16px;box-shadow:0 10px 15px -3px #00000014;margin-bottom:30px;padding:25px}.info-section h2{color:#2d3748;font-size:24px;margin-bottom:15px;margin-top:0}.info-section p{color:#718096;font-size:16px;line-height:1.6;margin:0}.quiz-types-grid{grid-gap:20px;display:grid;gap:20px;grid-template-columns:repeat(auto-fill,minmax(350px,1fr));margin-bottom:40px}.quiz-type-card{background:#fff;border:2px solid #0000;border-radius:16px;box-shadow:0 4px 15px #00000014;cursor:pointer;display:flex;min-height:150px;overflow:hidden;transition:all .3s ease}.quiz-type-card:hover{border-color:#667eea;box-shadow:0 15px 30px #0000001a;transform:translateY(-5px)}.quiz-type-card.selected{background:#f8f9ff;border-color:#667eea}.card-icon{align-items:center;background:linear-gradient(135deg,#667eea,#764ba2);color:#fff;display:flex;justify-content:center;min-width:80px;padding:25px}.quiz-type-icon{font-size:28px}.card-content{display:flex;flex:1 1;flex-direction:column;padding:20px}.type-header{margin-bottom:15px}.type-name{color:#2d3748;font-size:18px;font-weight:600;line-height:1.4;margin-bottom:8px;margin-top:0}.subject-count{color:#718096;display:block;font-size:14px}.card-footer{align-items:center;border-top:1px solid #e2e8f0;display:flex;justify-content:space-between;margin-top:auto;padding-top:15px}.view-text{color:#667eea;font-size:14px;font-weight:500}.arrow-icon{color:#667eea;font-size:18px;font-weight:700;transition:transform .3s ease}.quiz-type-card:hover .arrow-icon{transform:translateX(5px)}.no-quiz-types{background:#fff;border-radius:16px;box-shadow:0 10px 15px -3px #00000014;margin:40px auto;max-width:500px;padding:60px 30px;text-align:center}.no-data-icon{color:#cbd5e0;font-size:64px;margin-bottom:25px}.no-quiz-types h3{color:#2d3748;font-size:24px;margin-bottom:15px;margin-top:0}.no-quiz-types p{color:#718096;line-height:1.6;margin-bottom:15px}.help-text{color:#a0aec0!important;font-size:14px;margin-bottom:30px!important;margin-top:20px!important}.refresh-button{align-items:center;background:linear-gradient(135deg,#667eea,#764ba2);border:none;border-radius:8px;color:#fff;cursor:pointer;display:inline-flex;font-size:16px;font-weight:500;gap:8px;padding:12px 24px;transition:all .3s ease}.refresh-button:hover{box-shadow:0 10px 20px #667eea4d;transform:translateY(-2px)}.loading-container{padding:100px 20px;text-align:center}.spinner-container{margin-bottom:20px}.spinner{color:#667eea;font-size:40px}.loading-container h2{color:#2d3748;font-size:24px;margin-bottom:10px}.loading-container p{color:#718096;font-size:16px}@media (max-width:768px){.quiz-types-grid{grid-template-columns:1fr}.header-main{flex-direction:column;gap:15px;text-align:center}.header-icon-large{font-size:24px;height:50px;width:50px}.header-text-content h1{font-size:24px;margin-bottom:10px}.header-badges{justify-content:center}.quiz-type-card{flex-direction:column}.card-icon{min-width:100%;padding:20px}.quiz-type-icon{font-size:24px}.info-section{padding:20px}.info-section h2{font-size:20px}.info-section p{font-size:14px}}@media (max-width:480px){.header-gradient{border-bottom-left-radius:20px;border-bottom-right-radius:20px;padding:20px 15px}.header-text-content h1{font-size:22px}.header-badge{font-size:12px;padding:6px 12px}.page-content{padding:0 15px}}.years-page{background:#f8f9fc;min-height:100vh}.years-header{margin-bottom:25px}.header-gradient{background:linear-gradient(135deg,#667eea,#764ba2);border-bottom-left-radius:25px;border-bottom-right-radius:25px;box-shadow:0 4px 20px #0000001a;padding:25px 20px}.header-content-wrapper{margin:0 auto;max-width:1200px}.header-top{justify-content:space-between;margin-bottom:20px}.back-btn,.header-top{align-items:center;display:flex}.back-btn{background:#ffffffe6;border:none;border-radius:50px;color:#667eea;cursor:pointer;font-weight:500;gap:8px;padding:12px 20px;transition:all .3s ease}.back-btn:hover{background:#fff;box-shadow:0 4px 12px #00000026;transform:translateY(-2px)}.header-right-placeholder{width:40px}.header-main{display:flex;flex-direction:column;gap:20px}.header-text-content h1{color:#fff;font-size:28px;font-weight:700;margin:0 0 15px}.header-badges{display:flex;flex-wrap:wrap;gap:10px}.header-badge{align-items:center;background:#fff3;border-radius:20px;color:#fff;display:flex;font-size:14px;font-weight:500;gap:8px;padding:8px 16px}.years-content{margin:0 auto;max-width:1200px;padding:0 20px}.main-content{padding:20px 0 40px}.info-card{background:#fff;border-radius:15px;box-shadow:0 4px 15px #00000014;margin-bottom:15px;padding:15px;transition:all .3s ease}.info-card:hover{box-shadow:0 15px 30px #0000001a;transform:translateY(-3px)}.subject-header{align-items:center;display:flex;margin-bottom:12px}.subject-icon-container{align-items:center;background:#e2e8f0;border-radius:12px;color:#667eea;display:flex;font-size:22px;height:44px;justify-content:center;margin-right:12px;width:44px}.subject-info{flex:1 1}.subject-name{color:#2d3748;font-size:18px;font-weight:600;margin:0 0 2px}.quiz-type-text{color:#718096;font-size:14px;font-weight:400}.class-info-row{align-items:center;border-top:1px solid #e2e8f0;color:#718096;display:flex;gap:8px;padding-top:12px}.class-info-text{color:#2d3748;font-size:14px;font-weight:500}.selection-card{background:#fff;border-radius:15px;box-shadow:0 4px 15px #00000014;padding:15px;transition:all .3s ease}.selection-card:hover{box-shadow:0 15px 30px #0000001a;transform:translateY(-3px)}.selection-header{align-items:center;display:flex;margin-bottom:10px}.selection-icon{color:#667eea;font-size:22px;margin-right:10px}.selection-header h3{color:#2d3748;font-size:18px;font-weight:600;margin:0}.selection-description{color:#718096;font-size:14px;line-height:20px;margin-bottom:20px}.year-selector-button{background:#fff;border:1px solid #e2e8f0;border-radius:12px;cursor:pointer;margin-bottom:20px;padding:15px;transition:all .3s ease;width:100%}.year-selector-button:hover{border-color:#667eea;box-shadow:0 4px 12px #667eea1a}.year-selector-content{align-items:center;color:#718096;display:flex;justify-content:space-between}.selected-year-text{color:#2d3748;flex:1 1;font-size:16px;font-weight:500;margin:0 10px;text-align:center}.start-button{background:#667eea;border:none;border-radius:12px;box-shadow:0 4px 6px #667eea4d;color:#fff;cursor:pointer;font-size:16px;font-weight:600;padding:16px;transition:all .3s ease;width:100%}.start-button:hover:not(.disabled){background:#5a67d8;box-shadow:0 6px 12px #667eea66;transform:translateY(-2px)}.start-button.disabled{background:#cbd5e0;box-shadow:none;cursor:not-allowed;opacity:.6}.button-content{align-items:center;display:flex;gap:8px;justify-content:center}.spinner{animation:spin 1s linear infinite;border:2px solid #0000;border-radius:50%;border-top-color:#fff;height:20px;margin:0 auto;width:20px}.info-row{border-top:1px solid #e2e8f0;margin-top:20px;padding-top:15px}.years-count{color:#2d3748;font-size:14px;font-weight:600;margin:0 0 4px}.years-note{color:#718096;font-size:12px;font-style:italic;margin:0}.empty-state-container{align-items:center;display:flex;justify-content:center;padding:60px 20px}.empty-state-card{background:#fff;border-radius:15px;box-shadow:0 10px 15px -3px #00000014;max-width:500px;padding:40px;text-align:center;width:100%}.empty-icon{color:#cbd5e0;font-size:64px;margin-bottom:25px}.empty-state-card h2{color:#2d3748;font-size:24px;margin:0 0 15px}.empty-state-card p{color:#718096;font-size:16px;line-height:1.6;margin-bottom:15px}.back-button{align-items:center;background:#667eea;border-radius:12px;color:#fff;display:inline-flex;gap:8px;padding:12px 24px;transition:all .3s ease}.back-button:hover{background:#5a67d8;box-shadow:0 6px 12px #667eea4d;transform:translateY(-2px)}.modal-overlay{align-items:center;background:#00000080;bottom:0;display:flex;justify-content:center;left:0;padding:20px;position:fixed;right:0;top:0;z-index:1000}.modal-content{animation:modalAppear .3s ease;background:#fff;border-radius:15px;box-shadow:0 20px 40px #0003;max-height:70vh;max-width:500px;overflow:hidden;width:90%}@keyframes modalAppear{0%{opacity:0;transform:scale(.9)}to{opacity:1;transform:scale(1)}}.modal-header{align-items:center;border-bottom:1px solid #e2e8f0;display:flex;justify-content:space-between;padding:20px}.modal-title{color:#2d3748;font-size:18px;font-weight:600;margin:0}.modal-close{background:#0000;border:none;color:#718096;cursor:pointer;font-size:20px;padding:5px;transition:color .3s ease}.modal-close:hover{color:#2d3748}.modal-list{max-height:50vh;overflow-y:auto;padding:10px 0}.modal-item{border-bottom:1px solid #e2e8f0;cursor:pointer;padding:12px 20px;transition:background-color .3s ease}.modal-item:last-child{border-bottom:none}.modal-item:hover{background-color:#f7fafc}.modal-item.selected{background-color:#667eea1a}.modal-item-content{align-items:center;display:flex}.modal-item-icon{color:#718096;font-size:18px;margin-right:12px}.modal-item-text{color:#2d3748;flex:1 1;font-size:15px}.modal-check-icon{color:#667eea;font-size:20px;margin-left:8px}@media (max-width:768px){.header-text-content h1{font-size:24px;margin-bottom:10px}.header-badges{justify-content:center}.years-content{padding:0 15px}.subject-name{font-size:16px}.quiz-type-text{font-size:13px}.selection-header h3{font-size:16px}.selection-description{font-size:13px}.modal-content{width:95%}}@media (max-width:480px){.header-gradient{border-bottom-left-radius:20px;border-bottom-right-radius:20px;padding:20px 15px}.header-text-content h1{font-size:22px}.header-badge{font-size:12px;padding:6px 12px}.empty-state-card{padding:30px 20px}.empty-state-card h2{font-size:20px}.empty-state-card p{font-size:14px}}.quiz-history-page{margin:0 auto;max-width:1200px;padding:20px}.quiz-history-header{margin-bottom:30px;text-align:center}.quiz-history-header h1{align-items:center;color:#2c3e50;display:flex;gap:10px;justify-content:center;margin-bottom:10px}.quiz-history-header p{color:#7f8c8d;font-size:16px}.history-controls{display:flex;justify-content:flex-end;margin-bottom:20px}.controls-right{gap:16px}.controls-right,.search-box{align-items:center;display:flex}.search-box{background:#f5f5f5;border-radius:4px;min-width:20px;padding:4px 10px}.search-icon{color:#888;margin-left:- 5px}.search-input{background:#0000;border:none;font-size:1rem;outline:none;width:140px}.filter-section{position:relative}.filter-toggle{align-items:center;background:#fff;border:1px solid #ddd;border-radius:4px;cursor:pointer;display:flex;font-size:1rem;gap:6px;padding:6px 14px;transition:background .2s}.filter-toggle:hover{background:#f0f0f0}.filter-options{background:#fff;border:1px solid #ddd;border-radius:4px;box-shadow:0 2px 8px #00000014;min-width:140px;padding:6px 0;position:absolute;right:0;top:110%;z-index:10}.filter-option{color:#333;cursor:pointer;font-size:.98rem;padding:8px 16px;transition:background .2s}.filter-option.active,.filter-option:hover{background:#e6f0ff;color:#1976d2}.results-count{color:#7f8c8d;font-style:italic;margin-bottom:15px}.loading-state{align-items:center;display:flex;flex-direction:column;justify-content:center;padding:60px 20px}.loading-state .spinner{animation:spin 1s linear infinite;border:4px solid #f3f3f3;border-radius:50%;border-top-color:#3498db;height:40px;margin-bottom:20px;width:40px}@keyframes spin{0%{transform:rotate(0deg)}to{transform:rotate(1turn)}}.empty-state{color:#7f8c8d;padding:60px 20px;text-align:center}.empty-icon{color:#bdc3c7;font-size:48px;margin-bottom:20px}.empty-state h3{color:#2c3e50;margin-bottom:10px}.quiz-history-list{background:#fff;border-radius:12px;box-shadow:0 4px 12px #0000000d;overflow:hidden}.quiz-list-header{grid-gap:16px;background-color:#f8f9fa;border-bottom:1px solid #e9ecef;display:grid;font-weight:600;gap:16px;grid-template-columns:1fr 1fr 1fr 1.5fr 1.5fr 1fr;padding:16px 20px}.quiz-list-container{max-height:600px;overflow-y:auto}.quiz-list-item{grid-gap:16px;border-bottom:1px solid #f1f2f6;display:grid;gap:16px;grid-template-columns:1fr 1fr 1fr 1.5fr 1.5fr 1fr;padding:16px 20px;transition:background-color .2s}.quiz-list-item:hover{background-color:#f8f9fa}.quiz-list-item:last-child{border-bottom:none}.subject-cell{color:#2c3e50;font-weight:500}.type-cell{text-transform:capitalize}.year-cell{color:#7f8c8d}.time-cell{color:#5a6773;font-size:14px}.duration-cell{align-items:center;color:#3498db;display:flex;font-weight:500;gap:6px}@media (max-width:992px){.quiz-list-header,.quiz-list-item{grid-template-columns:1fr 1fr 1fr}.quiz-list-header span:nth-child(4),.quiz-list-header span:nth-child(5),.quiz-list-header span:nth-child(6),.quiz-list-item span:nth-child(4),.quiz-list-item span:nth-child(5),.quiz-list-item span:nth-child(6){display:none}}@media (max-width:768px){.quiz-history-page{padding:15px}.history-controls{align-items:stretch;flex-direction:column}.search-box{min-width:auto}.quiz-list-header,.quiz-list-item{gap:12px;grid-template-columns:1fr 1fr}.quiz-list-header span:nth-child(3),.quiz-list-item span:nth-child(3){display:none}.filter-options{left:0;right:auto}}@media (max-width:480px){.quiz-list-header,.quiz-list-item{grid-template-columns:1fr;text-align:center}.quiz-list-header span:nth-child(2),.quiz-list-item span:nth-child(2){display:none}.quiz-list-item{padding:12px 15px}}.legal-page{background:linear-gradient(135deg,#667eea,#764ba2);min-height:100vh;padding:20px}.legal-header{align-items:center;display:flex;justify-content:space-between;margin-bottom:20px;padding:0 10px}.back-button{background:#ffffffe6;border:none;border-radius:8px;box-shadow:0 2px 4px #0000001a;color:#4a5568;cursor:pointer;font-size:14px;font-weight:500;padding:10px 15px;transition:all .2s}.back-button:hover{background:#fff;box-shadow:0 4px 8px #00000026;transform:translateY(-1px)}.legal-header h1{color:#fff;flex:1 1;font-size:28px;font-weight:700;margin:0;text-align:center}.header-spacer{width:80px}.legal-content{margin:0 auto;max-width:800px}.last-updated{color:#fffc;font-size:14px;font-style:italic}.important-notice,.last-updated{margin-bottom:20px;text-align:center}.important-notice{background:#ffffffe6;border-left:4px solid #667eea;border-radius:10px;color:#667eea;font-weight:600;padding:15px}.content-card{background:#fff;border-radius:15px;box-shadow:0 10px 30px #0003;padding:30px}.content-card,.legal-section{margin-bottom:30px}.legal-section h2{border-bottom:2px solid #e2e8f0;color:#2d3748;font-size:20px;font-weight:600;margin-bottom:12px;padding-bottom:8px}.legal-section p{font-size:15px}.legal-section p,.legal-section ul{color:#4a5568;line-height:1.6;margin-bottom:12px}.legal-section ul{margin-left:20px}.legal-section li{font-size:15px;margin-bottom:8px}.legal-section strong{color:#2d3748}.contact-info{background:#f7fafc;border-left:4px solid #667eea;border-radius:8px;padding:15px}.contact-info p{margin-bottom:8px}.contact-info a{color:#667eea;font-weight:500;text-decoration:none}.contact-info a:hover{text-decoration:underline}@media (max-width:768px){.legal-page{padding:10px}.legal-header{flex-direction:column;gap:15px;text-align:center}.legal-header h1{font-size:24px}.back-button{align-self:flex-start}.header-spacer{display:none}.content-card{margin:0 10px 20px;padding:20px}.legal-section h2{font-size:18px}}.glass-card{-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);background:#0f172a80;border:1px solid #ffffff1a;border-radius:16px;box-shadow:0 10px 30px #0000004d;overflow:hidden}.input-container{padding-top:15px;position:relative}.input-label{color:#9ca3af;left:0;pointer-events:none;position:absolute;top:30px;transform-origin:left center;transition:all .3s}.auth-input{background:#0000;border:none;border-bottom:1px solid #fff3;color:#fff;font-size:16px;outline:none;padding:12px 0;transition:border-color .3s;width:100%}.auth-input:focus{border-color:#0000}.input-underline{bottom:0;height:2px;left:0;position:absolute;transform-origin:left center;width:100%}.gradient-btn,.input-underline{background:linear-gradient(90deg,#6366f1,#8b5cf6)}.gradient-btn{border:none;border-radius:12px;color:#fff;cursor:pointer;font-size:16px;font-weight:600;overflow:hidden;padding:12px 24px;position:relative;transition:all .3s}.gradient-btn:before{background:linear-gradient(90deg,#818cf8,#a78bfa);content:"";height:100%;left:0;opacity:0;position:absolute;top:0;transition:opacity .3s;width:100%}.gradient-btn:hover:before{opacity:1}.gradient-btn:disabled{cursor:not-allowed;opacity:.7}body{animation:gradientBG 15s ease infinite;background-size:200% 200%}@keyframes gradientBG{0%{background-position:0 50%}50%{background-position:100% 50%}to{background-position:0 50%}}.katex-renderer,.option,.options,.question-card,.question-header,.question-text,.theory-answer,.theory-item-block{-webkit-touch-callout:none;-webkit-user-select:none;user-select:none}.item-image,.question-image,img{-webkit-user-drag:none;user-drag:none;pointer-events:auto}@media print{body *{visibility:hidden!important}.question-card,.question-card *{visibility:visible!important}.question-card .item-image,.question-card .question-image,.question-card img{display:block!important;height:auto!important;max-width:100%!important;visibility:visible!important}.question-card{box-shadow:none!important;left:auto!important;margin:0!important;padding:0!important;position:static!important;top:auto!important;width:100%!important}.no-print-message{background:#fff;border:2px solid #333;color:#000;font-size:18px;left:20px;padding:20px;position:fixed;right:20px;top:20px;visibility:visible!important;z-index:99999}}.katex-renderer::selection,.question-text::selection{background:#0000}
/*# sourceMappingURL=main.a9538be5.css.map*/