*{margin:0;padding:0;box-sizing:border-box}:root{--linkedin-blue: #0A66C2;--linkedin-blue-dark: #004182;--linkedin-blue-light: #378fe9;--linkedin-blue-hover: #004182;--primary-500: #0A66C2;--primary-600: #004182;--primary-700: #003b73;--primary-400: #378fe9;--primary-300: #70b5f9;--gray-50: #fafafa;--gray-100: #f3f2ef;--gray-200: #e8e6e3;--gray-300: #d6d4d1;--gray-400: #a8a8a8;--gray-500: #666666;--gray-600: #434343;--gray-700: #313131;--gray-800: #1d1d1d;--gray-900: #000000;--success-500: #057642;--success-600: #034d2b;--warning-500: #915907;--error-500: #cc1016;--error-600: #a00d11;--bg-primary: #ffffff;--bg-secondary: #f3f2ef;--bg-tertiary: #e8e6e3;--border-light: rgba(0, 0, 0, .08);--border-medium: rgba(0, 0, 0, .15);--border-dark: rgba(0, 0, 0, .25);--shadow-card: 0 0 0 1px rgba(0, 0, 0, .08), 0 2px 4px rgba(0, 0, 0, .08);--shadow-card-hover: 0 0 0 1px rgba(0, 0, 0, .12), 0 4px 8px rgba(0, 0, 0, .12);--shadow-sm: 0 1px 2px rgba(0, 0, 0, .08);--shadow-md: 0 2px 4px rgba(0, 0, 0, .08);--shadow-lg: 0 4px 8px rgba(0, 0, 0, .12);--font-primary: -apple-system, system-ui, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", "Fira Sans", Ubuntu, Oxygen, "Oxygen Sans", Cantarell, "Droid Sans", "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Emoji", "Segoe UI Symbol", "Lucida Grande", Helvetica, Arial, sans-serif;--radius-sm: 2px;--radius-md: 4px;--radius-lg: 8px;--radius-xl: 12px;--transition-fast: 83ms ease-in-out;--transition-base: 167ms ease-in-out;--transition-slow: .25s ease-in-out;font-family:system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica Neue,Arial,sans-serif;line-height:1.5;font-weight:400;font-synthesis:none;text-rendering:optimizeLegibility;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}body{margin:0;min-width:320px;min-height:100vh;background:var(--bg-secondary);color:#000000e6;font-family:var(--font-primary);-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}#root{width:100%;min-height:100vh}h1,h2,h3,h4,h5,h6{line-height:1.2}button{font-family:inherit;cursor:pointer}a{color:#3498db;text-decoration:none}a:hover{text-decoration:underline}.notification-container{position:fixed;top:20px;right:20px;z-index:10000;max-width:400px;width:100%;pointer-events:none}.notification-toast{background:#fff;border-radius:12px;box-shadow:0 8px 32px #0000001f;margin-bottom:12px;overflow:hidden;position:relative;pointer-events:auto;border-left:4px solid #ccc;animation:slideIn .3s ease-out;max-width:400px;min-width:300px}.notification-toast.notification-success{border-left-color:#28a745}.notification-toast.notification-error{border-left-color:#dc3545}.notification-toast.notification-warning{border-left-color:#ffc107}.notification-toast.notification-info{border-left-color:#17a2b8}.notification-toast.notification-loading{border-left-color:#667eea}.notification-content{padding:16px 20px}.notification-header{display:flex;align-items:center;justify-content:space-between;margin-bottom:4px}.notification-icon{font-size:16px;margin-right:8px}.notification-title{font-weight:600;color:#333;flex:1;font-size:14px}.notification-close{background:none;border:none;font-size:20px;color:#666;cursor:pointer;padding:0 4px;line-height:1}.notification-close:hover{color:#333}.notification-message{color:#666;font-size:13px;line-height:1.4;margin-left:24px}.notification-progress{position:absolute;bottom:0;left:0;height:3px;background:linear-gradient(90deg,#667eea,#764ba2);animation:progress linear;transform-origin:left}.notification-success .notification-progress{background:linear-gradient(90deg,#28a745,#20c997)}.notification-error .notification-progress{background:linear-gradient(90deg,#dc3545,#e83e8c)}.notification-warning .notification-progress{background:linear-gradient(90deg,#ffc107,#fd7e14)}.notification-info .notification-progress{background:linear-gradient(90deg,#17a2b8,#6f42c1)}@keyframes slideIn{0%{transform:translate(100%);opacity:0}to{transform:translate(0);opacity:1}}@keyframes progress{0%{transform:scaleX(1)}to{transform:scaleX(0)}}.notification-loading .notification-icon{animation:spin 1s linear infinite}@media (max-width: 480px){.notification-container{top:10px;right:10px;left:10px;max-width:none}.notification-toast{min-width:auto;max-width:none}.notification-content{padding:14px 16px}.notification-title{font-size:13px}.notification-message{font-size:12px;margin-left:20px}}.login-container{min-height:100vh;display:flex;align-items:center;justify-content:center;background:var(--bg-secondary);padding:20px}.login-card{background:var(--bg-primary);border-radius:var(--radius-lg);padding:24px;width:100%;max-width:400px;box-shadow:var(--shadow-card);border:1px solid var(--border-light)}.login-header{text-align:center;margin-bottom:24px}.login-header h1{color:#000000e6;margin-bottom:4px;font-size:2rem;font-weight:400;line-height:1.25}.login-header p{color:#0009;margin:0;font-size:.875rem;line-height:1.42857}.login-form{display:flex;flex-direction:column;gap:16px}.form-group label{margin-bottom:4px;font-weight:600;color:#000000e6;font-size:.875rem;line-height:1.42857}.form-group input{padding:12px;border:1px solid var(--border-medium);border-radius:var(--radius-sm);font-size:1rem;transition:all var(--transition-fast);line-height:1.5;background:var(--bg-primary)}.form-group input:focus{outline:none;border-color:var(--linkedin-blue);box-shadow:0 0 0 1px var(--linkedin-blue)}.form-group input:disabled{background:var(--bg-secondary);cursor:not-allowed;opacity:.6}.error-message{background:#fff0f0;color:var(--error-500);padding:12px;border-radius:var(--radius-md);border:1px solid var(--error-500);font-size:.875rem;text-align:center;line-height:1.42857}.submit-button{background:var(--linkedin-blue);color:#fff;border:none;padding:12px 24px;border-radius:var(--radius-xl);font-size:1rem;font-weight:600;cursor:pointer;transition:all var(--transition-base);margin-top:8px;width:100%;line-height:1.25}.submit-button:hover:not(:disabled){background:var(--linkedin-blue-hover);box-shadow:0 2px 4px #00000026,0 0 0 1px #00000014}.submit-button:disabled{background:#00000014;color:#0000004d;cursor:not-allowed}.login-footer{text-align:center;margin-top:24px}.login-footer .contact-admin{color:#0009;margin:0;font-size:.875rem;line-height:1.42857}@media (max-width: 480px){.login-card{padding:20px}.login-header h1{font-size:1.75rem}}.upload-container{max-width:800px;margin:0 auto;padding:2rem}.upload-header{margin-bottom:3rem}.upload-header h2{color:#2c3e50;margin-bottom:.5rem;font-size:2rem}.subtitle{color:#7f8c8d;font-size:1.1rem}.upload-form{background:#fff;border-radius:12px;box-shadow:0 4px 16px #0000001a;overflow:hidden}.form-section{padding:2rem;border-bottom:1px solid #ecf0f1}.form-section:last-child{border-bottom:none}.form-section h3{color:#2c3e50;margin-bottom:1.5rem;font-size:1.3rem}.form-group{margin-bottom:1.5rem}.form-row{display:grid;grid-template-columns:1fr 1fr;gap:1rem}.form-group label{display:block;color:#2c3e50;font-weight:500;margin-bottom:.5rem}.form-group input[type=text],.form-group input[type=number]{width:100%;padding:.75rem;border:2px solid #e9ecef;border-radius:6px;font-size:1rem;transition:border-color .2s}.form-group input[type=text]:focus,.form-group input[type=number]:focus{outline:none;border-color:#3498db}.form-group input[type=file]{width:100%;padding:.75rem;border:2px dashed #bdc3c7;border-radius:6px;background:#f8f9fa;cursor:pointer;transition:all .2s}.form-group input[type=file]:hover:not(:disabled){border-color:#3498db;background:#e8f4f8}.form-group small{display:block;color:#7f8c8d;font-size:.85rem;margin-top:.25rem}.form-group input:disabled{opacity:.6;cursor:not-allowed}.form-actions{padding:2rem;background:#f8f9fa;display:flex;gap:1rem;justify-content:flex-end}.reset-button,.submit-button{padding:.75rem 2rem;border:none;border-radius:6px;font-size:1rem;cursor:pointer;transition:all .2s;font-weight:500}.reset-button{background:#95a5a6;color:#fff}.reset-button:hover:not(:disabled){background:#7f8c8d}.submit-button:hover:not(:disabled){background:#229954;transform:translateY(-1px)}.submit-button:disabled,.reset-button:disabled{opacity:.6;cursor:not-allowed;transform:none}.upload-result{margin-top:2rem;padding:2rem;border-radius:8px;border-left:4px solid}.upload-result.success{background:#d4edda;border-left-color:#27ae60}.upload-result.error{background:#f8d7da;border-left-color:#e74c3c}.upload-result h3{margin-bottom:1rem;color:#2c3e50}.upload-result.success h3{color:#27ae60}.upload-result.error h3{color:#e74c3c}.result-details{margin-top:1rem;padding-top:1rem;border-top:1px solid rgba(0,0,0,.1)}.result-details p{margin-bottom:.5rem;color:#2c3e50}.result-actions{display:flex;gap:1rem;margin-top:1rem}.view-exams-button,.upload-more-button{padding:.75rem 1.5rem;border:none;border-radius:6px;font-size:.9rem;cursor:pointer;transition:all .2s;font-weight:500}.view-exams-button{background:#3498db;color:#fff}.view-exams-button:hover{background:#2980b9}.upload-more-button{background:#f39c12;color:#fff}.upload-more-button:hover{background:#e67e22}.upload-progress-container{margin-top:2rem;padding:2rem;background:#fff;border-radius:12px;box-shadow:0 4px 16px #0000001a;animation:slideUp .3s ease}.progress-header{display:flex;align-items:center;gap:1rem;margin-bottom:1.5rem}.progress-icon{font-size:2rem;animation:pulse 1.5s infinite}.progress-icon.error{animation:shake .5s;color:#dc3545}.progress-icon.complete{animation:bounce .5s;color:#28a745}.progress-info{flex:1;display:flex;justify-content:space-between;align-items:center}.progress-info h4{margin:0;color:#333;font-size:1.1rem}.progress-percentage{font-size:1.2rem;font-weight:700;color:#3498db}.progress-bar-wrapper{margin-bottom:2rem}.progress-bar{height:24px;background:#e9ecef;border-radius:12px;overflow:hidden;position:relative}.progress-fill{height:100%;background:linear-gradient(90deg,#3498db,#2980b9);border-radius:12px;transition:width .5s ease,background .3s ease;position:relative;display:flex;align-items:center;justify-content:flex-end;padding-right:10px}.progress-fill:after{content:"";position:absolute;inset:0;background:linear-gradient(90deg,transparent,rgba(255,255,255,.3),transparent);animation:shimmer 2s infinite}.progress-fill.error{background:linear-gradient(90deg,#dc3545,#c82333)}.progress-fill.complete{background:linear-gradient(90deg,#28a745,#218838)}.progress-stages{display:flex;justify-content:space-between;position:relative;padding:0 10px}.progress-stages:before{content:"";position:absolute;top:15px;left:10px;right:10px;height:2px;background:#e9ecef;z-index:0}.stage{display:flex;flex-direction:column;align-items:center;gap:.5rem;position:relative;z-index:1}.stage-dot{width:30px;height:30px;border-radius:50%;background:#fff;border:3px solid #e9ecef;transition:all .3s ease}.stage.active .stage-dot{background:#3498db;border-color:#3498db;transform:scale(1.1)}.stage-label{font-size:.85rem;color:#999;text-align:center;white-space:nowrap;transition:color .3s ease}.stage.active .stage-label{color:#333;font-weight:500}.generated-files{margin-top:1rem;padding:1rem;background:#f8f9fa;border-radius:6px}.generated-files h4{margin:0 0 .5rem;color:#333;font-size:1rem}.generated-files ul{margin:0;padding-left:1.5rem}.generated-files li{color:#666;margin:.25rem 0;font-family:monospace;font-size:.9rem}.error-details{margin-top:1rem;padding:1rem;background:#0000000d;border-radius:6px}.error-details h4{margin:0 0 .5rem;color:#721c24;font-size:1rem}.error-details pre{margin:0;padding:.5rem;background:#fff;border-radius:4px;font-size:.85rem;overflow-x:auto}@keyframes pulse{0%,to{transform:scale(1)}50%{transform:scale(1.1)}}@keyframes shake{0%,to{transform:translate(0)}25%{transform:translate(-10px)}75%{transform:translate(10px)}}@keyframes bounce{0%,to{transform:translateY(0)}50%{transform:translateY(-10px)}}@keyframes shimmer{0%{transform:translate(-100%)}to{transform:translate(100%)}}@media (max-width: 768px){.upload-container{padding:1rem}.form-section{padding:1.5rem}.form-row{grid-template-columns:1fr}.form-actions,.result-actions{flex-direction:column}.upload-header h2{font-size:1.5rem}.progress-stages{display:none}.progress-info h4{font-size:.95rem}}.upload-with-ai{max-width:900px;margin:0 auto;padding:20px}.upload-header{background:var(--linkedin-blue);color:#fff;padding:30px;border-radius:12px;margin-bottom:30px;box-shadow:0 4px 6px #0000001a}.upload-header h2{margin:0 0 10px;font-size:28px}.upload-header>p{margin:0;opacity:.9}.api-key-warning,.api-key-success{margin-top:20px;padding:15px;border-radius:8px;display:flex;flex-direction:column;gap:5px}.api-key-warning{background:#ffc10733;border:2px solid rgba(255,193,7,.5)}.api-key-success{background:#4caf5033;border:2px solid rgba(76,175,80,.5)}.api-key-warning p,.api-key-success p{margin:0;font-weight:500}.api-key-warning small,.api-key-success small{opacity:.8;font-size:13px}.upload-form{background:#fff;padding:30px;border-radius:12px;box-shadow:0 2px 4px #0000001a}.form-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:20px;margin-bottom:20px}.form-group{display:flex;flex-direction:column}.form-group.full-width{grid-column:1 / -1}.form-group label{font-weight:600;margin-bottom:8px;color:#333;display:flex;align-items:center}.required{color:#e53e3e;margin-left:4px}.form-group input[type=text],.form-group input[type=number]{padding:10px 12px;border:2px solid #e0e0e0;border-radius:6px;font-size:14px;transition:border-color .3s}.form-group input:focus{outline:none;border-color:var(--linkedin-blue)}.form-group input:disabled{background:#f5f5f5;cursor:not-allowed}.form-group small{margin-top:4px;font-size:12px;color:#666}.file-input{padding:10px;border:2px dashed #ddd;border-radius:6px;cursor:pointer;transition:all .3s}.file-input:hover{border-color:var(--linkedin-blue);background:#0a66c20d}.file-selected{margin-top:10px;padding:10px;background:#e8f5e9;border-radius:6px;color:#2e7d32;font-size:14px}.cost-estimate{background:#fff3cd;border:2px solid #ffc107;border-radius:8px;padding:15px;margin-bottom:20px}.cost-estimate h4{margin:0 0 8px;color:#856404}.cost-estimate p{margin:0;color:#856404;font-size:14px}.cost-estimate small{color:#997404;font-size:12px}.upload-progress{background:#f0f4ff;padding:20px;border-radius:8px;margin-bottom:20px}.progress-bar{width:100%;height:8px;background:#e0e0e0;border-radius:4px;overflow:hidden;margin-bottom:10px}.progress-fill{height:100%;background:var(--linkedin-blue);transition:width .3s ease;border-radius:4px}.progress-message{font-weight:500;color:var(--linkedin-blue);margin:0 0 5px}.progress-detail{color:#666;font-size:12px}.upload-result{padding:20px;border-radius:8px;margin-bottom:20px}.upload-result.success{background:#e8f5e9;border:2px solid #4caf50}.upload-result h3{margin:0 0 15px;color:#2e7d32}.result-stats{display:grid;grid-template-columns:repeat(auto-fit,minmax(150px,1fr));gap:15px;margin-bottom:15px}.stat{background:#fff;padding:15px;border-radius:6px;text-align:center;box-shadow:0 1px 3px #0000001a}.stat.warning{background:#fff3cd}.stat-label{display:block;font-size:12px;color:#666;margin-bottom:5px}.stat-value{display:block;font-size:24px;font-weight:700;color:#2e7d32}.stat.warning .stat-value{color:#856404}.result-category{margin:0;color:#2e7d32}.form-actions{display:flex;justify-content:center;margin-top:30px}.btn-submit{padding:14px 32px;background:var(--linkedin-blue);color:#fff;border:none;border-radius:8px;font-size:16px;font-weight:600;cursor:pointer;transition:all .3s;box-shadow:0 4px 6px #0a66c24d}.btn-submit:hover:not(:disabled){background:var(--linkedin-blue-hover);transform:translateY(-2px);box-shadow:0 6px 12px #0a66c266}.btn-submit:disabled{background:#ccc;cursor:not-allowed;box-shadow:none}.upload-info{background:#f8f9fa;padding:20px;border-radius:8px;margin-top:30px}.upload-info h3{margin-top:0;color:#333}.upload-info ol{color:#555;line-height:1.8;padding-left:20px}.info-box{background:#fff;padding:15px;border-radius:6px;border-left:4px solid var(--linkedin-blue);margin-top:15px}.info-box p{margin:0 0 10px;font-weight:600;color:#333}.info-box pre{background:#f5f5f5;padding:15px;border-radius:4px;overflow-x:auto;font-size:13px;line-height:1.6;margin:0}.info-box code{background:#f5f5f5;padding:2px 6px;border-radius:3px;font-family:Courier New,monospace;font-size:13px;color:#d63031}.info-box ol{padding-left:20px}.info-box ol li{margin-bottom:8px}.info-box a{color:var(--linkedin-blue);text-decoration:none}.info-box a:hover{text-decoration:underline}@media (max-width: 768px){.form-grid,.result-stats{grid-template-columns:1fr}.upload-header h2{font-size:22px}.modal-content{padding:20px}}.category-permissions{max-width:1200px;margin:0 auto}.permissions-header{margin-bottom:30px}.permissions-header h3{color:#333;margin-bottom:8px;font-size:1.5rem}.permissions-header p{color:#666;margin:0;font-size:.95rem}.error-message,.success-message{padding:12px 16px;border-radius:8px;margin-bottom:20px;display:flex;justify-content:space-between;align-items:center;font-size:.9rem}.error-message{background:#fee;color:#c33;border:1px solid #fcc}.success-message{background:#efe;color:#363;border:1px solid #cfc}.error-message button,.success-message button{background:none;border:none;color:inherit;cursor:pointer;font-size:1.2rem;padding:0 8px}.category-selector{background:#fff;padding:24px;border-radius:12px;box-shadow:0 2px 4px #0000001a;margin-bottom:24px}.category-selector label{display:block;font-weight:600;color:#333;margin-bottom:8px}.category-selector select{width:100%;padding:12px 16px;border:2px solid #e1e5e9;border-radius:8px;font-size:16px;background:#fff;cursor:pointer}.category-selector select:focus{outline:none;border-color:var(--linkedin-blue)}.category-selector select:disabled{opacity:.6;cursor:not-allowed}.permissions-content{display:flex;flex-direction:column;gap:24px}.category-info{background:var(--linkedin-blue);color:#fff;padding:24px;border-radius:12px}.category-info h4{margin:0 0 8px;font-size:1.3rem}.category-info p{margin:0 0 16px;opacity:.9;font-size:.95rem}.category-stats{display:flex;gap:24px;flex-wrap:wrap}.category-stats .stat{font-size:.9rem}.category-stats .stat strong{font-size:1.1rem;display:block}.bulk-actions{background:#fff;padding:24px;border-radius:12px;box-shadow:0 2px 4px #0000001a}.bulk-actions h4{color:#333;margin:0 0 16px;font-size:1.1rem}.bulk-buttons{display:flex;gap:12px;flex-wrap:wrap}.grant-all-btn,.revoke-all-btn{padding:10px 20px;border:none;border-radius:8px;cursor:pointer;font-weight:500;font-size:.9rem;transition:all .2s ease}.grant-all-btn{background:#28a745;color:#fff}.grant-all-btn:hover:not(:disabled){background:#218838}.revoke-all-btn{background:#dc3545;color:#fff}.revoke-all-btn:hover:not(:disabled){background:#c82333}.grant-all-btn:disabled,.revoke-all-btn:disabled{opacity:.5;cursor:not-allowed}.users-permissions{background:#fff;padding:24px;border-radius:12px;box-shadow:0 2px 4px #0000001a}.users-permissions h4{color:#333;margin:0 0 20px;font-size:1.1rem}.users-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:16px}.user-card{border:2px solid #e1e5e9;border-radius:12px;padding:20px;transition:all .2s ease}.user-card.has-permission{border-color:#28a745;background:#f8fff9}.user-card.no-permission{border-color:#ffc107;background:#fffef8}.user-card:hover{transform:translateY(-2px);box-shadow:0 4px 12px #0000001a}.user-info{margin-bottom:16px}.user-name{font-weight:600;color:#333;margin-bottom:4px;font-size:1.05rem}.user-username{color:#666;font-size:.9rem;margin-bottom:8px}.user-stats{display:flex;gap:12px;font-size:.8rem;color:#777}.permission-actions{display:flex;justify-content:space-between;align-items:center;gap:12px}.permission-status{display:flex;align-items:center;gap:6px;font-size:.85rem;font-weight:500}.permission-status.granted{color:#28a745}.permission-status.denied{color:#ffc107}.status-icon{font-size:.8rem}.permission-btn{padding:6px 12px;border:none;border-radius:6px;cursor:pointer;font-weight:500;font-size:.8rem;transition:all .2s ease;min-width:70px}.permission-btn.grant{background:#28a745;color:#fff}.permission-btn.grant:hover:not(:disabled){background:#218838}.permission-btn.revoke{background:#dc3545;color:#fff}.permission-btn.revoke:hover:not(:disabled){background:#c82333}.permission-btn:disabled{opacity:.5;cursor:not-allowed}.no-categories,.no-students{text-align:center;padding:40px;color:#666;background:#fff;border-radius:12px;box-shadow:0 2px 4px #0000001a}.no-categories h3,.no-students p{margin-bottom:12px}@media (max-width: 768px){.category-stats{gap:16px}.bulk-buttons{flex-direction:column}.grant-all-btn,.revoke-all-btn{width:100%}.users-grid{grid-template-columns:1fr}.permission-actions{flex-direction:column;gap:8px;align-items:stretch}.permission-btn{width:100%}}.data-filters{background:#fff;border-radius:12px;padding:20px;margin-bottom:20px;box-shadow:0 2px 4px #0000001a}.filters-row{display:flex;gap:16px;align-items:end;flex-wrap:wrap}.filter-group{display:flex;flex-direction:column;min-width:150px}.filter-group.search-group{flex:1;min-width:200px;max-width:300px}.filter-group label{font-size:.85rem;font-weight:500;color:#555;margin-bottom:6px}.search-input,.filter-select,.sort-select{padding:10px 12px;border:2px solid #e1e5e9;border-radius:8px;font-size:14px;background:#fff;transition:border-color .2s ease}.search-input:focus,.filter-select:focus,.sort-select:focus{outline:none;border-color:var(--linkedin-blue)}.search-input{width:100%}.sort-group{min-width:200px}.sort-controls{display:flex;gap:8px;align-items:center}.sort-select{flex:1}.sort-order-btn{width:40px;height:40px;border:2px solid #e1e5e9;border-radius:8px;background:#fff;cursor:pointer;font-size:16px;font-weight:700;transition:all .2s ease;display:flex;align-items:center;justify-content:center}.sort-order-btn:hover{border-color:var(--linkedin-blue);background:#f8f9fa}.sort-order-btn.asc{color:#28a745}.sort-order-btn.desc{color:#dc3545}.clear-filters-btn{padding:10px 16px;background:#dc3545;color:#fff;border:none;border-radius:8px;font-size:14px;cursor:pointer;font-weight:500;transition:background-color .2s ease;height:40px}.clear-filters-btn:hover{background:#c82333}.active-filters{margin-top:16px;padding-top:16px;border-top:1px solid #e1e5e9;display:flex;align-items:center;gap:8px;flex-wrap:wrap}.active-filters-label{font-size:.85rem;color:#666;font-weight:500}.filter-tag{background:var(--linkedin-blue);color:#fff;padding:4px 8px;border-radius:16px;font-size:.8rem;display:flex;align-items:center;gap:6px}.filter-tag button{background:#ffffff4d;border:none;color:#fff;border-radius:50%;width:16px;height:16px;font-size:12px;cursor:pointer;display:flex;align-items:center;justify-content:center;line-height:1}.filter-tag button:hover{background:#ffffff80}@media (max-width: 768px){.filters-row{flex-direction:column;align-items:stretch}.filter-group{min-width:auto}.filter-group.search-group{max-width:none}.sort-controls{flex-direction:column;gap:8px}.sort-order-btn{width:100%}.active-filters{flex-direction:column;align-items:flex-start;gap:8px}.active-filters-label{margin-bottom:4px}}@media (max-width: 480px){.data-filters{padding:16px}.filters-row{gap:12px}.filter-group label{font-size:.8rem}.search-input,.filter-select,.sort-select{padding:8px 10px;font-size:13px}.clear-filters-btn{padding:8px 12px;font-size:13px;height:auto}}.export-options{position:relative;display:inline-block}.export-trigger-btn{background:#28a745;color:#fff;border:none;padding:10px 16px;border-radius:8px;cursor:pointer;font-size:.9rem;font-weight:500;display:flex;align-items:center;gap:8px;transition:all .2s ease;box-shadow:0 2px 4px #28a74533}.export-trigger-btn:hover:not(:disabled){background:#218838;transform:translateY(-1px);box-shadow:0 4px 8px #28a7454d}.export-trigger-btn:disabled{opacity:.6;cursor:not-allowed;transform:none}.data-count{font-size:.8rem;opacity:.8;font-weight:400}.export-dropdown{position:absolute;top:calc(100% + 8px);left:0;background:#fff;border-radius:12px;box-shadow:0 8px 32px #00000026;min-width:320px;z-index:1000;border:1px solid #e1e5e9;overflow:hidden}.export-overlay{position:fixed;inset:0;z-index:999;background:transparent}.export-header{padding:20px;border-bottom:1px solid #e1e5e9;background:linear-gradient(135deg,#28a745,#20c997);color:#fff}.export-header h4{margin:0 0 8px;font-size:1.1rem;font-weight:600}.export-header p{margin:0 0 12px;font-size:.85rem;opacity:.9;line-height:1.4}.data-info{background:#fff3;padding:6px 10px;border-radius:6px;display:inline-block}.data-info span{font-size:.8rem;font-weight:500}.export-formats{padding:20px}.export-formats h5{margin:0 0 12px;color:#333;font-size:.9rem;font-weight:600}.format-buttons{display:grid;grid-template-columns:1fr 1fr;gap:12px}.format-btn{display:flex;align-items:center;gap:12px;padding:16px;border:2px solid #e1e5e9;border-radius:10px;background:#fff;cursor:pointer;transition:all .2s ease;text-align:left}.format-btn:hover:not(:disabled){border-color:var(--linkedin-blue);background:#f8f9fa;transform:translateY(-2px);box-shadow:0 4px 12px #0000001a}.format-btn:disabled{opacity:.5;cursor:not-allowed;transform:none}.format-icon{font-size:24px;flex-shrink:0}.format-info{flex:1}.format-name{font-weight:600;color:#333;font-size:.9rem;margin-bottom:2px}.format-desc{font-size:.75rem;color:#666}.csv-btn:hover:not(:disabled){border-color:#28a745}.json-btn:hover:not(:disabled){border-color:#17a2b8}.export-actions{padding:16px 20px;border-top:1px solid #e1e5e9;background:#f8f9fa;display:flex;justify-content:flex-end}.cancel-btn{background:#6c757d;color:#fff;border:none;padding:8px 16px;border-radius:6px;cursor:pointer;font-size:.85rem;transition:background-color .2s ease}.cancel-btn:hover:not(:disabled){background:#5a6268}.cancel-btn:disabled{opacity:.6;cursor:not-allowed}@media (max-width: 768px){.export-dropdown{min-width:280px;max-width:90vw}.export-header,.export-formats,.export-actions{padding:16px}.format-buttons{grid-template-columns:1fr;gap:10px}.format-btn{padding:12px}.format-icon{font-size:20px}}@keyframes slideDown{0%{opacity:0;transform:translateY(-10px)}to{opacity:1;transform:translateY(0)}}.export-dropdown{animation:slideDown .2s ease-out}.pagination-container{background:#fff;border-radius:12px;padding:20px;margin-top:20px;box-shadow:0 2px 4px #0000001a;border:1px solid #e1e5e9}.pagination-info{display:flex;justify-content:space-between;align-items:center;margin-bottom:16px;padding-bottom:16px;border-bottom:1px solid #e1e5e9;font-size:.9rem;color:#666}.page-size-selector{display:flex;align-items:center;gap:8px}.page-size-selector label{font-weight:500;color:#555}.page-size-selector select{padding:6px 10px;border:1px solid #ddd;border-radius:6px;font-size:.85rem;background:#fff;cursor:pointer}.page-size-selector select:focus{outline:none;border-color:var(--linkedin-blue)}.pagination-controls{display:flex;justify-content:center;align-items:center;gap:8px;margin-bottom:16px}.page-btn{padding:10px 14px;border:1px solid #ddd;background:#fff;color:#555;cursor:pointer;border-radius:8px;font-size:.85rem;transition:all .2s ease;font-weight:500;min-width:44px;height:44px;display:flex;align-items:center;justify-content:center}.page-btn:hover:not(:disabled){background:#f8f9fa;border-color:var(--linkedin-blue);color:var(--linkedin-blue)}.page-btn:disabled{opacity:.5;cursor:not-allowed;background:#f8f9fa}.page-btn.active{background:var(--linkedin-blue);color:#fff;border-color:var(--linkedin-blue);font-weight:600}.page-btn.ellipsis{border:none;background:transparent;cursor:default}.page-btn.ellipsis:hover{background:transparent;border:none;color:#555}.prev-btn,.next-btn{padding:10px 16px;font-weight:500}.prev-btn:hover:not(:disabled),.next-btn:hover:not(:disabled){background:var(--linkedin-blue);color:#fff;transform:translate(0)}.page-numbers{display:flex;gap:4px;align-items:center}.pagination-summary{display:flex;justify-content:space-between;align-items:center;padding-top:16px;border-top:1px solid #e1e5e9;font-size:.85rem;color:#666}.quick-navigation{display:flex;gap:8px}.quick-btn{padding:6px 12px;border:1px solid #ddd;background:#fff;color:#666;cursor:pointer;border-radius:6px;font-size:.8rem;transition:all .2s ease}.quick-btn:hover:not(:disabled){background:#f8f9fa;border-color:var(--linkedin-blue);color:var(--linkedin-blue)}.quick-btn:disabled{opacity:.4;cursor:not-allowed}@media (max-width: 768px){.pagination-container{padding:16px}.pagination-info{flex-direction:column;gap:12px;align-items:flex-start}.pagination-controls{flex-wrap:wrap;gap:6px}.page-btn{padding:8px 12px;min-width:40px;height:40px;font-size:.8rem}.prev-btn,.next-btn{padding:8px 12px;font-size:.8rem}.pagination-summary{flex-direction:column;gap:12px;align-items:flex-start}.quick-navigation{align-self:stretch;justify-content:center}}@media (max-width: 480px){.pagination-controls{flex-direction:column;gap:12px}.page-numbers{order:2}.prev-btn{order:1;width:100%}.next-btn{order:3;width:100%}.page-btn{min-width:36px;height:36px;padding:6px 10px}}.pagination-container{animation:fadeIn .3s ease-out}@keyframes fadeIn{0%{opacity:0;transform:translateY(10px)}to{opacity:1;transform:translateY(0)}}.configuration-panel{min-height:100vh;background:#f5f6fa;padding:20px}.config-header{background:#fff;border-radius:12px;padding:24px;margin-bottom:20px;box-shadow:0 2px 8px #0000001a;display:flex;justify-content:space-between;align-items:center}.config-header-content h2{margin:0 0 8px;color:#333;font-size:1.8rem;font-weight:700}.config-header-content p{margin:0;color:#666;font-size:1rem}.config-header-actions{display:flex;gap:12px}.config-content{display:grid;grid-template-columns:280px 1fr;gap:20px;min-height:calc(100vh - 160px)}.config-nav{background:#fff;border-radius:12px;padding:24px;box-shadow:0 2px 8px #0000001a;height:fit-content}.config-nav h3{margin:0 0 20px;color:#333;font-size:1.2rem;font-weight:600}.config-nav ul{list-style:none;padding:0;margin:0}.config-nav li{margin-bottom:4px}.config-nav-item{display:flex;align-items:center;gap:12px;width:100%;padding:12px 16px;background:none;border:none;border-radius:8px;cursor:pointer;font-size:.9rem;font-weight:500;text-align:left;transition:all .2s ease;color:#555}.config-nav-item:hover{background:#f8f9fa;color:#333}.config-nav-item.active,.config-nav-item.editing{background:var(--linkedin-blue);color:#fff}.config-nav-icon{font-size:1.2rem;width:20px;display:flex;justify-content:center}.config-nav-text{flex:1;position:relative}.config-unsaved-indicator{position:absolute;right:-8px;top:0;color:gold;font-size:.6rem;animation:pulse 1.5s infinite}@keyframes pulse{0%,to{opacity:1}50%{opacity:.5}}.config-main{background:#fff;border-radius:12px;box-shadow:0 2px 8px #0000001a;overflow:hidden}.config-placeholder{padding:60px 40px;text-align:center;color:#666;font-size:1.1rem}.config-section-content{height:100%}.config-section-header{display:flex;justify-content:space-between;align-items:flex-start;padding:24px;border-bottom:1px solid #e1e5e9;background:linear-gradient(135deg,#f8f9fa,#fff)}.config-section-info h3{margin:0 0 8px;color:#333;font-size:1.4rem;font-weight:600}.config-section-info p{margin:0;color:#666;font-size:.9rem;line-height:1.4}.config-section-actions{display:flex;gap:12px}.config-btn{padding:10px 20px;border:none;border-radius:8px;cursor:pointer;font-size:.9rem;font-weight:500;transition:all .2s ease;display:flex;align-items:center;gap:8px}.config-btn:disabled{opacity:.5;cursor:not-allowed}.config-btn-primary{background:var(--linkedin-blue);color:#fff}.config-btn-primary:hover:not(:disabled){background:var(--linkedin-blue-hover);transform:translateY(-1px);box-shadow:0 4px 12px #0a66c24d}.config-btn-success{background:#28a745;color:#fff}.config-btn-success:hover:not(:disabled){background:#218838;transform:translateY(-1px);box-shadow:0 4px 12px #28a7454d}.config-btn-secondary{background:#6c757d;color:#fff}.config-btn-secondary:hover:not(:disabled){background:#5a6268}.config-btn-danger{background:#dc3545;color:#fff}.config-btn-danger:hover:not(:disabled){background:#c82333}.config-btn-cancel{background:#f8f9fa;color:#6c757d;border:1px solid #dee2e6}.config-btn-cancel:hover:not(:disabled){background:#e9ecef;color:#495057}.config-btn-outline{background:#fff;color:var(--linkedin-blue);border:1px solid var(--linkedin-blue)}.config-btn-outline:hover:not(:disabled){background:var(--linkedin-blue);color:#fff}.config-fields{padding:24px;max-height:calc(100vh - 300px);overflow-y:auto}.config-field{margin-bottom:24px}.config-field-readonly{margin-bottom:24px;padding-bottom:16px;border-bottom:1px solid #f1f3f4}.config-field-readonly:last-child{border-bottom:none;margin-bottom:0}.config-field-label{display:block;font-weight:600;margin-bottom:8px;color:#333;font-size:.9rem}.config-input,.config-select{width:100%;padding:12px 16px;border:2px solid #e1e5e9;border-radius:8px;font-size:.9rem;transition:all .2s ease;background:#fff;color:#333;box-sizing:border-box}.config-input:focus,.config-select:focus{outline:none;border-color:var(--linkedin-blue);box-shadow:0 0 0 3px #0a66c21a}.config-select{cursor:pointer;background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16'%3E%3Cpath fill='none' stroke='%23666' stroke-linecap='round' stroke-linejoin='round' stroke-width='2' d='M2 5l6 6 6-6'/%3E%3C/svg%3E");background-repeat:no-repeat;background-position:right 12px center;background-size:16px;padding-right:40px;appearance:none}.config-field-value{padding:12px 16px;background:#f8f9fa;border:2px solid #e1e5e9;border-radius:8px;font-size:.9rem;color:#495057;min-height:20px}.config-field-description{margin:6px 0 0;font-size:.8rem;color:#6c757d;line-height:1.4}.config-checkbox-label{display:flex;align-items:center;gap:12px;cursor:pointer;font-weight:600;color:#333;font-size:.9rem}.config-checkbox-label input[type=checkbox]{display:none}.config-checkbox-custom{width:20px;height:20px;border:2px solid #e1e5e9;border-radius:4px;display:flex;align-items:center;justify-content:center;transition:all .2s ease;background:#fff}.config-checkbox-label input[type=checkbox]:checked+.config-checkbox-custom{background:var(--linkedin-blue);border-color:var(--linkedin-blue)}.config-checkbox-label input[type=checkbox]:checked+.config-checkbox-custom:after{content:"✓";color:#fff;font-size:12px;font-weight:700}.config-modal-overlay{position:fixed;inset:0;background:#00000080;z-index:1000;display:flex;align-items:center;justify-content:center;animation:fadeIn .2s ease-out}.config-modal{background:#fff;border-radius:12px;box-shadow:0 20px 60px #0000004d;max-width:500px;width:90%;max-height:80vh;overflow:hidden;animation:slideIn .3s ease-out}.config-modal-header{padding:24px 24px 0;border-bottom:1px solid #e1e5e9}.config-modal-header h3{margin:0 0 16px;color:#333;font-size:1.3rem;font-weight:600}.config-modal-content{padding:24px}.config-modal-content p{margin:0 0 16px;color:#555;line-height:1.5}.config-modal-content p:last-child{margin-bottom:0}.config-modal-actions{padding:20px 24px;border-top:1px solid #e1e5e9;display:flex;justify-content:flex-end;gap:12px;background:#f8f9fa}.config-loading{display:flex;flex-direction:column;align-items:center;justify-content:center;min-height:400px;color:#666}.config-spinner{width:40px;height:40px;border:3px solid #f3f3f3;border-top:3px solid var(--linkedin-blue);border-radius:50%;animation:spin 1s linear infinite;margin-bottom:16px}@keyframes slideIn{0%{opacity:0;transform:translateY(-20px) scale(.95)}to{opacity:1;transform:translateY(0) scale(1)}}@media (max-width: 1024px){.config-content{grid-template-columns:240px 1fr}.config-header{flex-direction:column;gap:16px;text-align:center}.config-header-actions{width:100%;justify-content:center}}@media (max-width: 768px){.configuration-panel{padding:10px}.config-content{grid-template-columns:1fr;gap:16px}.config-nav{padding:16px}.config-nav ul{display:grid;grid-template-columns:repeat(auto-fit,minmax(120px,1fr));gap:8px}.config-nav-item{padding:8px 12px;font-size:.8rem}.config-nav-icon{font-size:1rem}.config-section-header{flex-direction:column;gap:16px;align-items:stretch}.config-section-actions{justify-content:center}.config-fields{padding:16px}.config-modal{margin:20px;width:auto}.config-modal-content,.config-modal-header{padding:16px}.config-modal-actions{padding:16px;flex-direction:column}.config-btn{width:100%;justify-content:center}}@media (max-width: 480px){.config-header{padding:16px}.config-header-content h2{font-size:1.4rem}.config-section-actions{flex-direction:column}.config-input,.config-select{padding:10px 12px}}.analytics-dashboard{min-height:100vh;background:#f5f6fa;padding:20px}.analytics-header{background:#fff;border-radius:12px;padding:24px;margin-bottom:20px;box-shadow:0 2px 8px #0000001a;display:flex;justify-content:space-between;align-items:center}.analytics-header-content h2{margin:0 0 8px;color:#333;font-size:1.8rem;font-weight:700}.analytics-header-content p{margin:0;color:#666;font-size:1rem}.analytics-controls{display:flex;gap:12px;align-items:center}.period-selector{padding:10px 16px;border:1px solid #ddd;border-radius:8px;background:#fff;font-size:.9rem;cursor:pointer}.export-btn,.refresh-btn{padding:10px 16px;border:none;border-radius:8px;cursor:pointer;font-size:.9rem;font-weight:500;transition:all .2s ease}.export-btn{background:#28a745;color:#fff}.refresh-btn{background:var(--linkedin-blue);color:#fff}.export-btn:hover,.refresh-btn:hover{transform:translateY(-1px);box-shadow:0 4px 12px #0003}.last-updated{text-align:center;font-size:.85rem;color:#666;margin-bottom:20px;padding:8px;background:#fff;border-radius:6px}.analytics-content{display:grid;grid-template-columns:200px 1fr;gap:20px;min-height:calc(100vh - 200px)}.analytics-nav{background:#fff;border-radius:12px;padding:20px;box-shadow:0 2px 8px #0000001a;height:fit-content;display:flex;flex-direction:column;gap:8px}.nav-btn{display:flex;align-items:center;gap:12px;width:100%;padding:12px 16px;background:none;border:none;border-radius:8px;cursor:pointer;font-size:.9rem;font-weight:500;text-align:left;transition:all .2s ease;color:#555}.nav-btn:hover{background:#f8f9fa;color:#333}.nav-btn.active{background:var(--linkedin-blue);color:#fff}.analytics-main{background:#fff;border-radius:12px;padding:24px;box-shadow:0 2px 8px #0000001a;overflow-y:auto;max-height:calc(100vh - 200px)}.analytics-loading,.analytics-error{display:flex;flex-direction:column;align-items:center;justify-content:center;min-height:400px;color:#666}.analytics-spinner{width:40px;height:40px;border:3px solid #f3f3f3;border-top:3px solid var(--linkedin-blue);border-radius:50%;animation:spin 1s linear infinite;margin-bottom:16px}.retry-button{margin-top:16px;padding:10px 20px;background:var(--linkedin-blue);color:#fff;border:none;border-radius:8px;cursor:pointer}.realtime-section{margin-bottom:32px;padding-bottom:24px;border-bottom:1px solid #e1e5e9}.realtime-section h3{margin:0 0 20px;color:#333;display:flex;align-items:center;gap:8px}.realtime-section h3:before{content:"🔴";animation:pulse 2s infinite}.realtime-metrics{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:16px}.metric-card{background:#fff;border-radius:12px;padding:20px;box-shadow:0 2px 8px #0000001a;border-left:4px solid var(--linkedin-blue);position:relative;overflow:hidden}.metric-card.metric-success{border-left-color:#28a745}.metric-card.metric-warning{border-left-color:#ffc107}.metric-card.metric-danger{border-left-color:#dc3545}.metric-card.metric-info{border-left-color:#17a2b8}.metric-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:12px}.metric-icon{font-size:1.5rem}.metric-trend{font-size:.8rem;font-weight:600;padding:4px 8px;border-radius:12px}.trend-up{background:#d4edda;color:#155724}.trend-down{background:#f8d7da;color:#721c24}.metric-content{text-align:left}.metric-value{font-size:2rem;font-weight:700;color:#333;margin-bottom:4px}.metric-title{font-size:.9rem;font-weight:600;color:#555;margin-bottom:4px}.metric-subtitle{font-size:.8rem;color:#666}.key-metrics{margin-bottom:32px}.key-metrics h3{margin:0 0 20px;color:#333}.metrics-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(250px,1fr));gap:20px}.insights-section{margin-bottom:32px}.insights-section h3{margin:0 0 20px;color:#333}.insights-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(300px,1fr));gap:16px}.insight-card{background:#fff;border-radius:12px;padding:20px;box-shadow:0 2px 8px #0000001a;border-left:4px solid #17a2b8}.insight-card.insight-success{border-left-color:#28a745}.insight-card.insight-warning{border-left-color:#ffc107}.insight-card.insight-error{border-left-color:#dc3545}.insight-card.severity-high{border-left-width:6px}.insight-header{display:flex;align-items:center;gap:12px;margin-bottom:12px}.insight-icon{font-size:1.2rem}.insight-title{font-weight:600;color:#333;font-size:.9rem}.insight-message{color:#555;line-height:1.5;margin-bottom:8px}.insight-metric{font-size:.8rem;color:#666;font-weight:500}.simple-chart{background:#fff;border-radius:12px;padding:20px;margin-bottom:24px;box-shadow:0 2px 8px #0000001a}.chart-title{margin:0 0 20px;color:#333;font-size:1.1rem;font-weight:600}.chart-placeholder{display:flex;align-items:center;justify-content:center;background:#f8f9fa;border-radius:8px;color:#666;font-style:italic}.chart-content{width:100%}.bar-chart{display:flex;align-items:end;gap:12px;height:200px;padding:20px 0}.bar-item{display:flex;flex-direction:column;align-items:center;flex:1;min-width:60px}.bar{background:var(--linkedin-blue);border-radius:4px 4px 0 0;width:100%;max-width:40px;min-height:4px;margin-bottom:8px;transition:all .3s ease}.bar:hover{opacity:.8;transform:scale(1.05)}.bar-label{font-size:.7rem;color:#666;text-align:center;margin-bottom:4px;word-break:break-word}.bar-value{font-size:.8rem;font-weight:600;color:#333}.line-chart{position:relative;width:100%}.line-chart svg{border-radius:8px;background:#f8f9fa}.line-chart-labels{display:flex;justify-content:space-between;margin-top:8px}.line-label{font-size:.7rem;color:#666}.users-table,.exams-table,.difficulty-table{width:100%;margin-top:16px;background:#fff;border-radius:8px;overflow:hidden;box-shadow:0 2px 4px #0000001a}.users-table table,.exams-table table,.difficulty-table table{width:100%;border-collapse:collapse}.users-table th,.users-table td,.exams-table th,.exams-table td,.difficulty-table th,.difficulty-table td{padding:12px;text-align:left;border-bottom:1px solid #e1e5e9}.users-table th,.exams-table th,.difficulty-table th{background:#f8f9fa;font-weight:600;color:#333;font-size:.9rem}.users-table td,.exams-table td,.difficulty-table td{font-size:.85rem;color:#555}.category-cards{display:grid;grid-template-columns:repeat(auto-fit,minmax(250px,1fr));gap:16px;margin-top:16px}.category-card{background:#fff;border-radius:12px;padding:20px;box-shadow:0 2px 8px #0000001a;border-left:4px solid var(--linkedin-blue)}.category-card h5{margin:0 0 16px;color:#333;font-size:1.1rem}.category-stats{display:grid;grid-template-columns:1fr 1fr;gap:12px}.category-stat{display:flex;justify-content:space-between;align-items:center;padding:8px 12px;background:#f8f9fa;border-radius:6px;font-size:.85rem}.category-stat span:first-child{color:#666}.category-stat span:last-child{font-weight:600;color:#333}.stats-grid,.retention-stats,.time-stats,.completion-stats{display:grid;grid-template-columns:repeat(auto-fit,minmax(150px,1fr));gap:16px;margin-top:16px}.stat-card,.retention-stat,.time-stat,.completion-stat{background:#f8f9fa;border-radius:8px;padding:16px;text-align:center;border:1px solid #e1e5e9}.stat-card.highlight,.retention-stat.highlight,.time-stat.highlight,.completion-stat.highlight{background:var(--linkedin-blue);color:#fff}.stat-label{display:block;font-size:.8rem;color:#666;margin-bottom:8px;font-weight:500}.stat-value{display:block;font-size:1.5rem;font-weight:700;color:#333}.completion-stat.success{border-left:4px solid #28a745}.completion-stat.warning{border-left:4px solid #ffc107}.completion-stat.info{border-left:4px solid #17a2b8}.difficulty-badge{padding:4px 8px;border-radius:12px;font-size:.75rem;font-weight:500;text-transform:uppercase}.difficulty-muy-difícil{background:#dc3545;color:#fff}.difficulty-difícil{background:#ffc107;color:#212529}.difficulty-moderado{background:#17a2b8;color:#fff}.difficulty-fácil{background:#28a745;color:#fff}@media (max-width: 1024px){.analytics-content{grid-template-columns:1fr}.analytics-nav{flex-direction:row;overflow-x:auto;padding:16px}.nav-btn{white-space:nowrap;min-width:120px}}@media (max-width: 768px){.analytics-dashboard{padding:10px}.analytics-header{flex-direction:column;gap:16px;text-align:center}.analytics-controls{width:100%;justify-content:center}.realtime-metrics,.metrics-grid,.insights-grid,.category-cards{grid-template-columns:1fr}.stats-grid,.retention-stats,.time-stats,.completion-stats{grid-template-columns:repeat(2,1fr)}.analytics-nav{gap:4px}.nav-btn{padding:8px 12px;font-size:.8rem}}@media (max-width: 480px){.analytics-header-content h2{font-size:1.4rem}.metric-value{font-size:1.5rem}.bar-chart{height:150px}.stats-grid,.retention-stats,.time-stats,.completion-stats{grid-template-columns:1fr}}.exam-manager{background:#fff;border-radius:12px;padding:24px;box-shadow:0 2px 8px #0000001a}.manager-header{margin-bottom:24px;border-bottom:2px solid #f0f2f5;padding-bottom:16px}.manager-header h3{margin:0 0 8px;color:#1a1a1a;font-size:1.5rem}.manager-header p{margin:0;color:#666;font-size:.95rem}.manager-content{display:grid;grid-template-columns:1fr 2fr;gap:24px;min-height:400px}.categories-panel{border-right:1px solid #e1e5e9;padding-right:24px}.categories-panel h4,.exams-panel h4{margin:0 0 16px;color:#333;font-size:1.1rem;font-weight:600}.categories-list{display:flex;flex-direction:column;gap:8px}.category-item{display:flex;align-items:center;justify-content:space-between;padding:12px 16px;background:#f8f9fa;border-radius:8px;border:2px solid transparent;transition:all .2s ease;cursor:pointer}.category-item:hover{background:#e9ecef;border-color:#dee2e6}.category-item.selected{background:#0a66c214;border-color:var(--linkedin-blue)}.category-info{flex:1;display:flex;flex-direction:column;gap:4px}.category-name{font-weight:500;color:#333;font-size:1rem}.category-stats{font-size:.85rem;color:#666}.exams-panel{padding-left:24px}.exams-list{display:flex;flex-direction:column;gap:12px}.exam-item{display:flex;align-items:center;justify-content:space-between;padding:16px;background:#f8f9fa;border-radius:8px;border:1px solid #e1e5e9;transition:all .2s ease}.exam-item:hover{background:#e9ecef;border-color:#dee2e6}.exam-info{flex:1;display:flex;flex-direction:column;gap:6px}.exam-name{font-weight:500;color:#333;font-size:1rem}.exam-stats{font-size:.85rem;color:#666}.delete-button{background:#dc3545;color:#fff;border:none;padding:8px 12px;border-radius:6px;cursor:pointer;font-size:1rem;transition:all .2s ease;display:flex;align-items:center;justify-content:center}.delete-button:hover{background:#c82333;transform:scale(1.05)}.delete-button:active{transform:scale(.95)}.loading{padding:40px;text-align:center;color:#666;font-size:.95rem}.no-items{padding:40px 20px;text-align:center;color:#999;font-size:.95rem;background:#f8f9fa;border-radius:8px;border:2px dashed #dee2e6}.confirm-dialog-overlay{position:fixed;inset:0;background:#00000080;display:flex;align-items:center;justify-content:center;z-index:1000;animation:fadeIn .2s ease}.confirm-dialog{background:#fff;border-radius:12px;padding:32px;max-width:500px;width:90%;box-shadow:0 10px 40px #0003;animation:slideUp .3s ease}.confirm-dialog h3{margin:0 0 20px;color:#333;font-size:1.3rem}.confirm-message{margin-bottom:24px}.confirm-message p{margin:0 0 12px;color:#666;line-height:1.5}.confirm-message strong{color:#333}.warning-message{color:#dc3545!important;font-weight:500;margin:16px 0 8px!important}.confirm-message ul{margin:8px 0 16px 20px;padding:0;list-style-type:disc}.confirm-message li{color:#666;margin:4px 0}.important-note{background:#fff3cd;color:#856404;padding:12px;border-radius:6px;border-left:4px solid #ffc107;margin-top:16px!important;font-weight:500}.confirm-actions{display:flex;gap:12px;justify-content:flex-end}.cancel-button{background:#6c757d;color:#fff;border:none;padding:10px 24px;border-radius:6px;cursor:pointer;font-size:1rem;transition:background .2s ease}.cancel-button:hover:not(:disabled){background:#5a6268}.confirm-delete-button{background:#dc3545;color:#fff;border:none;padding:10px 24px;border-radius:6px;cursor:pointer;font-size:1rem;transition:background .2s ease}.confirm-delete-button:hover:not(:disabled){background:#c82333}.cancel-button:disabled,.confirm-delete-button:disabled{opacity:.6;cursor:not-allowed}@keyframes slideUp{0%{transform:translateY(20px);opacity:0}to{transform:translateY(0);opacity:1}}@media (max-width: 768px){.manager-content{grid-template-columns:1fr;gap:32px}.categories-panel{border-right:none;border-bottom:1px solid #e1e5e9;padding-right:0;padding-bottom:24px}.exams-panel{padding-left:0}.confirm-dialog{padding:24px;width:95%}}.modal-overlay{position:fixed;inset:0;background:#00000080;display:flex;align-items:center;justify-content:center;z-index:1000;padding:20px}.modal-content{background:#fff;border-radius:12px;width:100%;max-width:600px;max-height:90vh;overflow-y:auto;box-shadow:0 20px 60px #0000004d}.modal-header{display:flex;justify-content:space-between;align-items:center;padding:24px 24px 16px;border-bottom:1px solid #e5e7eb}.modal-header h2{margin:0;font-size:1.5rem;color:#1f2937}.close-button{background:none;border:none;font-size:2rem;color:#6b7280;cursor:pointer;padding:0;width:32px;height:32px;display:flex;align-items:center;justify-content:center;border-radius:6px;transition:all .2s}.close-button:hover{background:#f3f4f6;color:#1f2937}.create-user-form{padding:24px}.form-row{display:grid;grid-template-columns:1fr 1fr;gap:16px;margin-bottom:16px}.form-group{margin-bottom:16px}.form-group label{display:block;margin-bottom:6px;font-weight:500;color:#374151;font-size:.9rem}.form-group .required{color:#ef4444}.form-group input,.form-group select{width:100%;padding:10px 14px;border:1px solid #d1d5db;border-radius:6px;font-size:14px;transition:border-color .2s}.form-group input:focus,.form-group select:focus{outline:none;border-color:var(--linkedin-blue);box-shadow:0 0 0 3px #0a66c21a}.form-group input:disabled,.form-group select:disabled{background:#f9fafb;cursor:not-allowed}.password-input-group{display:flex;gap:8px}.password-input-group input{flex:1}.generate-password-btn{padding:10px 16px;background:var(--linkedin-blue);color:#fff;border:none;border-radius:6px;cursor:pointer;font-size:14px;font-weight:500;white-space:nowrap;transition:background .2s}.generate-password-btn:hover:not(:disabled){background:var(--linkedin-blue-hover)}.generate-password-btn:disabled{background:#9ca3af;cursor:not-allowed}.password-info{display:block;margin-top:6px;color:#059669;font-size:.85rem}.password-info strong{font-family:Courier New,monospace;background:#f0fdf4;padding:2px 6px;border-radius:4px}.checkbox-group{margin-top:20px;padding:16px;background:#f9fafb;border-radius:8px;border:1px solid #e5e7eb}.checkbox-label{display:flex;align-items:center;gap:10px;cursor:pointer;font-weight:500;color:#374151}.checkbox-label input[type=checkbox]{width:18px;height:18px;cursor:pointer}.checkbox-help{display:block;margin-top:8px;margin-left:28px;color:#6b7280;font-size:.85rem}.modal-actions{display:flex;gap:12px;justify-content:flex-end;margin-top:24px;padding-top:20px;border-top:1px solid #e5e7eb}.btn-cancel{padding:10px 20px;background:#fff;color:#374151;border:1px solid #d1d5db;border-radius:6px;cursor:pointer;font-size:14px;font-weight:500;transition:all .2s}.btn-cancel:hover:not(:disabled){background:#f9fafb;border-color:#9ca3af}.btn-cancel:disabled{opacity:.5;cursor:not-allowed}.btn-submit{padding:10px 24px;background:var(--linkedin-blue);color:#fff;border:none;border-radius:6px;cursor:pointer;font-size:14px;font-weight:500;transition:background .2s}.btn-submit:hover:not(:disabled){background:var(--linkedin-blue-hover)}.btn-submit:disabled{background:#9ca3af;cursor:not-allowed}@media (max-width: 640px){.form-row{grid-template-columns:1fr}.modal-content{max-height:95vh}.modal-header{padding:20px 16px 12px}.create-user-form{padding:16px}}.admin-dashboard{min-height:100vh;background:var(--bg-secondary)}.admin-header{background:var(--bg-primary);border-bottom:1px solid var(--border-light);padding:0 20px;box-shadow:var(--shadow-sm)}.admin-content{display:flex;max-width:1200px;margin:0 auto;gap:20px;padding:20px}.admin-nav{background:var(--bg-primary);border-radius:var(--radius-lg);border:1px solid var(--border-light);padding:16px;height:fit-content;min-width:200px;box-shadow:var(--shadow-card)}.nav-item{display:block;width:100%;padding:10px 12px;background:none;border:none;text-align:left;cursor:pointer;border-radius:var(--radius-md);margin-bottom:4px;font-size:.875rem;font-weight:600;color:#000000e6;transition:all var(--transition-fast);line-height:1.42857}.nav-item:hover{background:var(--bg-secondary)}.nav-item.active{background:#0a66c214;color:var(--linkedin-blue)}.admin-main{flex:1;background:var(--bg-primary);border-radius:var(--radius-lg);border:1px solid var(--border-light);padding:24px;box-shadow:var(--shadow-card)}.overview-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:30px}.overview-header h3{margin:0;color:#333;font-size:1.5rem}.stats-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:20px;margin-bottom:30px}.stat-card{background:var(--bg-primary);border:1px solid var(--border-light);color:#000000e6;padding:24px;border-radius:var(--radius-lg);text-align:center;box-shadow:var(--shadow-card);transition:all var(--transition-base)}.stat-card h3{margin:0 0 12px;font-size:.875rem;color:#0009;font-weight:400;line-height:1.42857}.stat-number{font-size:2rem;font-weight:600;margin-bottom:8px;color:#000000e6;line-height:1.33333}.stat-detail{font-size:.8rem;color:#0009}.recent-activity h3{margin-bottom:20px;color:#333}.activity-list{space-y:12px}.activity-item{display:flex;justify-content:space-between;align-items:center;padding:16px;background:var(--bg-secondary);border-radius:var(--radius-lg);border-left:4px solid var(--linkedin-blue);margin-bottom:12px}.activity-info{flex:1}.activity-score{font-weight:600;color:var(--linkedin-blue)}.activity-date{font-size:.8rem;color:#666}.users-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:20px}.users-header h3{margin:0;color:#333}.users-header-actions{display:flex;gap:12px;align-items:center}.btn-create-user{padding:10px 20px;background:var(--linkedin-blue);color:#fff;border:none;border-radius:var(--radius-xl);cursor:pointer;font-size:14px;font-weight:600;transition:all var(--transition-base);display:flex;align-items:center;gap:6px}.btn-create-user:hover{background:var(--linkedin-blue-hover);box-shadow:0 2px 4px #00000026,0 0 0 1px #00000014}.table-info{margin-bottom:12px;padding:8px 0;color:#666;font-size:.9rem;border-bottom:1px solid #e1e5e9}.no-results{text-align:center;color:#666;font-style:italic;padding:40px 20px}.users-table{overflow-x:auto}.users-table table{width:100%;border-collapse:collapse;background:var(--bg-primary)}.users-table th,.users-table td{padding:12px;text-align:left;border-bottom:1px solid var(--border-light)}.users-table th{background:var(--bg-secondary);font-weight:600;color:#000000e6}.role-badge{padding:4px 8px;border-radius:4px;font-size:.8rem;font-weight:500}.role-badge.admin{background:#ffeaa7;color:#d63031}.role-badge.student{background:#a7f3d0;color:#059669}.status-badge{padding:4px 8px;border-radius:4px;font-size:.8rem;font-weight:500}.status-badge.active{background:#a7f3d0;color:#059669}.status-badge.inactive{background:#fecaca;color:#dc2626}.toggle-button{padding:6px 12px;border:none;border-radius:4px;cursor:pointer;font-size:.8rem;font-weight:500}.toggle-button.disable{background:#fecaca;color:#dc2626}.toggle-button.enable{background:#a7f3d0;color:#059669}.toggle-button:hover{opacity:.8}.action-buttons{display:flex;gap:8px;flex-wrap:wrap}.delete-button{padding:6px 12px;background:#fee2e2;color:#dc2626;border:none;border-radius:4px;cursor:pointer;font-size:.8rem;font-weight:500;transition:all .2s}.delete-button:hover{background:#fecaca;box-shadow:0 2px 4px #dc262633}.delete-button:active{transform:scale(.98)}.loading-spinner{width:40px;height:40px;border:3px solid #f3f3f3;border-top:3px solid var(--linkedin-blue);border-radius:50%;animation:spin 1s linear infinite;margin-bottom:16px}@media (max-width: 768px){.admin-content{flex-direction:column;padding:10px}.admin-nav{min-width:auto}.header-content{flex-direction:column;gap:15px;text-align:center}.stats-grid{grid-template-columns:1fr}.activity-item{flex-direction:column;align-items:flex-start;gap:8px}.users-table{font-size:.8rem}}.exam-view-container{max-width:900px;margin:0 auto;padding:2rem}.exam-header{margin-bottom:2rem}.exam-header h2{color:#2c3e50;margin-bottom:1rem}.progress-bar{height:8px;background:#ecf0f1;border-radius:4px;overflow:hidden;margin-bottom:.5rem}.progress{height:100%;background:#3498db;transition:width .3s ease}.exam-info{display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:1rem}.question-counter,.answered-counter{color:#7f8c8d;font-size:.9rem}.answered-counter{background:#e8f4f8;color:#2980b9;padding:.25rem .75rem;border-radius:4px;font-weight:700}.question-container{background:#fff;padding:2rem;border-radius:8px;box-shadow:0 2px 8px #0000001a;margin-bottom:2rem}.options-container{display:flex;flex-direction:column;gap:1rem}.option-label{display:flex;align-items:flex-start;padding:1rem;background:#f8f9fa;border-radius:4px;cursor:pointer;transition:background .2s}.option-label:hover{background:#e9ecef}.navigation-buttons{display:flex;justify-content:space-between;margin-bottom:2rem}.nav-button,.submit-button{padding:.75rem 2rem;border:none;border-radius:4px;font-size:1rem;cursor:pointer;transition:background .2s}.nav-button{background:#95a5a6;color:#fff}.nav-button:hover:not(:disabled){background:#7f8c8d}.submit-button{background:#27ae60;color:#fff}.submit-button:hover:not(:disabled){background:#229954}.submit-button:disabled{opacity:.5;cursor:not-allowed}.question-overview{background:#fff;padding:1.5rem;border-radius:8px;box-shadow:0 2px 8px #0000001a}.question-overview h4{color:#2c3e50;margin-bottom:1rem}.question-dots{display:flex;flex-wrap:wrap;gap:.5rem}.question-dot{width:40px;height:40px;border:2px solid #bdc3c7;background:#fff;border-radius:50%;cursor:pointer;transition:all .2s;font-size:.9rem}.question-dot.answered{background:#3498db;color:#fff;border-color:#3498db}.question-dot.current{border-color:#e74c3c;border-width:3px}.question-dot:hover{transform:scale(1.1)}.modal-buttons .confirm-button{background:#e74c3c;color:#fff}.modal-buttons .confirm-button:hover{background:#c0392b;transform:translateY(-1px);box-shadow:0 4px 12px #e74c3c4d}.practice-container{max-width:900px;margin:0 auto;padding:2rem}.practice-header{margin-bottom:2rem}.practice-header h2{color:#2c3e50;margin-bottom:1rem}.progress-bar{height:10px;background:#ecf0f1;border-radius:5px;overflow:hidden;margin-bottom:1rem}.progress{height:100%;background:linear-gradient(90deg,#3498db,#2980b9);transition:width .3s ease}.practice-info{display:flex;justify-content:space-between;align-items:center;color:#7f8c8d;font-size:.9rem;flex-wrap:wrap;gap:1rem}.stats{background:#e8f6f3;color:#27ae60;padding:.25rem .75rem;border-radius:4px;font-weight:700}.finish-now-button{background:#f39c12;color:#fff;border:none;padding:.5rem 1rem;border-radius:6px;font-size:.9rem;cursor:pointer;transition:background .2s;font-weight:500}.finish-now-button:hover:not(:disabled){background:#e67e22}.finish-now-button:disabled{background:#bdc3c7;cursor:not-allowed}.question-container{background:#fff;padding:2rem;border-radius:12px;box-shadow:0 4px 16px #0000001a;margin-bottom:2rem}.question-text{color:#2c3e50;margin-bottom:1rem;line-height:1.6}.multiple-answers-hint{background:#e3f2fd;color:#1976d2;padding:.75rem 1rem;border-radius:6px;margin-bottom:1.5rem;font-size:.9rem;border-left:4px solid #1976d2;font-weight:500}.options-container{display:flex;flex-direction:column;gap:1rem;margin-bottom:2rem}.option-label{display:flex;align-items:flex-start;padding:1.25rem;background:#f8f9fa;border-radius:8px;cursor:pointer;transition:all .2s;position:relative;border:2px solid transparent}.option-label:hover:not(.disabled){background:#e9ecef;border-color:#3498db}.option-label.selected{background:#e3f2fd;border-color:#3498db}.option-label.disabled{cursor:not-allowed}.option-label.correct-answer{background:#d4edda;border-color:#27ae60}.option-label.incorrect-answer{background:#f8d7da;border-color:#e74c3c}.option-label input[type=radio]{margin-right:1rem;margin-top:.2rem}.option-text{flex:1;line-height:1.5}.feedback-icon{margin-left:1rem;font-weight:700;font-size:1.2rem}.feedback-icon.correct{color:#27ae60}.feedback-icon.incorrect{color:#e74c3c}.feedback-container{background:#fff;border-radius:8px;padding:1.5rem;margin-top:1rem;border-left:4px solid}.feedback-container.correct{border-left-color:#27ae60;background:#f0f9f0}.feedback-container.incorrect{border-left-color:#e74c3c;background:#fdf2f2}.feedback-header{display:flex;align-items:center;gap:.75rem;margin-bottom:.5rem}.feedback-icon-large{font-size:1.5rem}.feedback-text{font-weight:700;font-size:1.1rem}.feedback-container.correct .feedback-text{color:#27ae60}.feedback-container.incorrect .feedback-text{color:#e74c3c}.correct-answer-text{margin:0;color:#2c3e50;line-height:1.5}.explanation-box{margin-top:1rem;padding:1rem;background:#ffffff80;border-radius:6px;border:1px solid rgba(0,0,0,.1)}.explanation-box h4{margin:0 0 .5rem;color:#3498db;font-size:1rem;font-weight:600}.explanation-box p{margin:0;color:#34495e;line-height:1.6;font-size:.95rem}.navigation-buttons{display:flex;justify-content:space-between;align-items:center;gap:1rem}.center-buttons{display:flex;gap:1rem}.nav-button,.exit-button{padding:.75rem 2rem;border:none;border-radius:6px;font-size:1rem;cursor:pointer;transition:background .2s;background:#95a5a6;color:#fff}.nav-button:hover:not(:disabled),.exit-button:hover{background:#7f8c8d}.nav-button:disabled{opacity:.5;cursor:not-allowed}.submit-answer-button{padding:.75rem 2rem;background:#3498db;color:#fff;border:none;border-radius:6px;font-size:1rem;cursor:pointer;transition:background .2s}.submit-answer-button:hover:not(:disabled){background:#2980b9}.submit-answer-button:disabled{background:#bdc3c7;cursor:not-allowed}.next-button{padding:.75rem 2rem;background:#27ae60;color:#fff;border:none;border-radius:6px;font-size:1rem;cursor:pointer;transition:background .2s}.next-button:hover{background:#229954}.finish-button{padding:.75rem 2rem;background:#e74c3c;color:#fff;border:none;border-radius:6px;font-size:1rem;cursor:pointer;transition:background .2s}.finish-button:hover{background:#c0392b}.loading,.error{text-align:center;padding:3rem;font-size:1.2rem;color:#666}.modal-overlay{position:fixed;inset:0;background:#0009;display:flex;justify-content:center;align-items:center;z-index:1000;animation:fadeIn .2s ease}.modal-content{background:#fff;border-radius:12px;padding:2rem;max-width:500px;width:90%;box-shadow:0 10px 40px #0003;animation:slideIn .3s ease}.modal-content h3{color:#2c3e50;font-size:1.5rem;margin-bottom:1rem;text-align:center}.modal-content p{color:#666;font-size:1rem;margin-bottom:.8rem;text-align:center;line-height:1.5}.modal-content p.warning{color:#f39c12;font-weight:500;margin:1rem 0;padding:.5rem;background:#fff9e5;border-radius:6px;border-left:4px solid #f39c12;text-align:left}.modal-buttons{display:flex;gap:1rem;justify-content:center;margin-top:1.5rem}.modal-buttons button{padding:.75rem 1.5rem;border:none;border-radius:8px;font-size:1rem;cursor:pointer;transition:all .2s;font-weight:500;min-width:140px}.modal-buttons .cancel-button{background:#ecf0f1;color:#7f8c8d}.modal-buttons .cancel-button:hover{background:#bdc3c7;color:#2c3e50}.modal-buttons .confirm-button{background:#3498db;color:#fff}.modal-buttons .confirm-button:hover{background:#2980b9;transform:translateY(-1px);box-shadow:0 4px 12px #3498db4d}@keyframes fadeIn{0%{opacity:0}to{opacity:1}}@keyframes slideIn{0%{transform:translateY(-20px);opacity:0}to{transform:translateY(0);opacity:1}}@media (max-width: 768px){.practice-container{padding:1rem}.question-container{padding:1.5rem}.navigation-buttons{flex-direction:column;gap:1rem}.center-buttons{order:-1}.practice-info{flex-direction:column;gap:.5rem;text-align:center}}.category-exams-container{max-width:1200px;margin:0 auto;padding:2rem}.header-section{margin-bottom:3rem}.back-button{background:#95a5a6;color:#fff;border:none;padding:.5rem 1rem;border-radius:6px;font-size:.9rem;cursor:pointer;transition:background .2s;margin-bottom:1rem}.back-button:hover{background:#7f8c8d}.header-section h2{color:#2c3e50;margin-bottom:.5rem;font-size:2rem}.exam-count-subtitle{color:#7f8c8d;font-size:1rem;margin:0}.loading{text-align:center;padding:3rem;font-size:1.2rem;color:#666}.no-exams{padding:3rem}.empty-state{text-align:center;max-width:400px;margin:0 auto}.empty-icon{font-size:4rem;margin-bottom:1rem}.empty-state h3{color:#2c3e50;margin-bottom:1rem}.empty-state p{color:#7f8c8d;line-height:1.6}.exam-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(350px,1fr));gap:2rem}.exam-card{background:#fff;border-radius:12px;padding:2rem;box-shadow:0 4px 16px #0000001a;cursor:pointer;transition:all .3s ease;border:2px solid transparent;display:flex;flex-direction:column;height:100%}.exam-card:hover{transform:translateY(-4px);box-shadow:0 8px 24px #00000026;border-color:#3498db}.exam-header{display:flex;justify-content:space-between;align-items:flex-start;margin-bottom:1rem;gap:1rem}.exam-name{color:#2c3e50;margin:0;font-size:1.3rem;flex:1;line-height:1.3}.question-count-badge{background:#e8f4f8;color:#2980b9;padding:.25rem .75rem;border-radius:20px;font-size:.8rem;font-weight:500;white-space:nowrap}.exam-description{flex:1;margin-bottom:1.5rem}.exam-description p{color:#7f8c8d;line-height:1.5;margin:0}.exam-actions{margin-top:auto}.start-exam-button{background:#3498db;color:#fff;border:none;padding:.75rem 1.5rem;border-radius:8px;font-size:1rem;cursor:pointer;transition:all .2s;width:100%;font-weight:500}.start-exam-button:hover{background:#2980b9;transform:translateY(-1px)}@media (max-width: 768px){.category-exams-container{padding:1rem}.exam-grid{grid-template-columns:1fr;gap:1.5rem}.exam-card{padding:1.5rem}.exam-header{flex-direction:column;align-items:flex-start;gap:.5rem}.question-count-badge{align-self:flex-start}.header-section h2{font-size:1.5rem}}.exam-results-container{max-width:1200px;margin:0 auto;padding:2rem;animation:fadeIn .3s ease}.results-header{text-align:center;margin-bottom:2rem}.results-header h2{color:#2c3e50;font-size:2rem;margin-bottom:.5rem}.results-header h3{color:#7f8c8d;font-size:1.2rem;font-weight:400}.score-card{background:#fff;border-radius:16px;padding:2rem;box-shadow:0 4px 20px #0000001a;display:flex;align-items:center;gap:3rem;margin-bottom:2rem;border:3px solid transparent;transition:all .3s ease}.score-card.passing{border-color:#27ae60;background:linear-gradient(135deg,#fff,#f0fff4)}.score-card.failing{border-color:#e74c3c;background:linear-gradient(135deg,#fff,#fff5f5)}.score-circle{min-width:150px;height:150px;border-radius:50%;display:flex;flex-direction:column;align-items:center;justify-content:center;background:#fff;box-shadow:0 8px 30px #0000001a}.score-card.passing .score-circle{border:4px solid #27ae60}.score-card.failing .score-circle{border:4px solid #e74c3c}.score-percentage{font-size:3rem;font-weight:700;color:#2c3e50}.score-label{font-size:.9rem;font-weight:600;margin-top:.5rem}.score-card.passing .score-label{color:#27ae60}.score-card.failing .score-label{color:#e74c3c}.score-details{flex:1;display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:1.5rem}.score-stat{display:flex;flex-direction:column;gap:.5rem}.stat-label{color:#7f8c8d;font-size:.9rem;text-transform:uppercase;letter-spacing:.5px}.stat-value{font-size:1.5rem;font-weight:700;color:#2c3e50}.stat-value.correct{color:#27ae60}.stat-value.incorrect{color:#e74c3c}.progress-breakdown{background:#fff;border-radius:12px;padding:1.5rem;margin-bottom:2rem;box-shadow:0 2px 10px #0000000d}.progress-bar-container{margin-bottom:1.5rem}.progress-bar-container:last-child{margin-bottom:0}.progress-bar-label{display:flex;justify-content:space-between;margin-bottom:.5rem;font-size:.9rem;color:#666}.progress-bar{height:24px;background:#ecf0f1;border-radius:12px;overflow:hidden}.progress-fill{height:100%;transition:width .5s ease;display:flex;align-items:center;justify-content:flex-end;padding-right:.5rem;color:#fff;font-size:.8rem;font-weight:700}.correct-fill{background:linear-gradient(90deg,#27ae60,#229954)}.incorrect-fill{background:linear-gradient(90deg,#e74c3c,#c0392b)}.details-toggle{text-align:center;margin:2rem 0}.toggle-button{padding:.75rem 2rem;background:#3498db;color:#fff;border:none;border-radius:8px;font-size:1rem;cursor:pointer;transition:all .2s}.toggle-button:hover{background:#2980b9;transform:translateY(-2px);box-shadow:0 4px 12px #3498db4d}.questions-detail{background:#fff;border-radius:12px;padding:2rem;margin-bottom:2rem;box-shadow:0 2px 10px #0000000d}.questions-detail h3{color:#2c3e50;margin-bottom:1.5rem}.questions-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(50px,1fr));gap:.5rem;margin-bottom:2rem}.question-bubble{width:50px;height:50px;border-radius:8px;border:2px solid transparent;display:flex;align-items:center;justify-content:center;font-weight:700;cursor:pointer;transition:all .2s;background:#fff}.question-bubble.correct{background:#d4edda;color:#155724;border-color:#27ae60}.question-bubble.incorrect{background:#f8d7da;color:#721c24;border-color:#e74c3c}.question-bubble:hover{transform:scale(1.1)}.question-bubble.selected{transform:scale(1.1);box-shadow:0 4px 12px #0003}.question-detail-card{background:#f8f9fa;border-radius:12px;padding:1.5rem;margin-bottom:2rem;border:2px solid #dee2e6}.question-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:1rem}.question-header h4{color:#2c3e50;margin:0}.status-badge{padding:.25rem 1rem;border-radius:20px;font-size:.9rem;font-weight:700}.status-badge.correct{background:#27ae60;color:#fff}.status-badge.incorrect{background:#e74c3c;color:#fff}.question-text{color:#2c3e50;font-size:1.1rem;margin-bottom:1.5rem;line-height:1.6}.options-review{display:flex;flex-direction:column;gap:.75rem}.option-review{padding:1rem;background:#fff;border-radius:8px;border:2px solid #dee2e6;display:flex;align-items:center;gap:1rem;position:relative}.option-review.user-selected{border-color:#3498db;background:#ebf5fb}.option-review.correct-answer{border-color:#27ae60;background:#eafaf1}.option-review.user-selected.correct-answer{background:linear-gradient(135deg,#eafaf1,#d4edda)}.option-label{font-weight:700;color:#7f8c8d;min-width:30px}.option-text{flex:1;color:#2c3e50}.badge{padding:.25rem .75rem;border-radius:12px;font-size:.8rem;font-weight:700;margin-left:auto}.badge.correct{background:#27ae60;color:#fff}.badge.incorrect{background:#e74c3c;color:#fff}.badge.success{background:linear-gradient(90deg,#27ae60,#229954);color:#fff}.all-questions-expanded{display:flex;flex-direction:column;gap:2rem}.question-full-card{background:#fff;border-radius:12px;padding:2rem;box-shadow:0 2px 10px #0000000d;border-left:6px solid transparent;transition:all .2s}.question-full-card.correct{border-left-color:#27ae60;background:linear-gradient(135deg,#fff,#f0fff4)}.question-full-card.incorrect{border-left-color:#e74c3c;background:linear-gradient(135deg,#fff,#fff5f5)}.question-number-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:1.5rem}.question-number-big{font-size:1.5rem;font-weight:700;color:#7f8c8d}.question-text-full{color:#2c3e50;font-size:1.2rem;margin-bottom:1.5rem;line-height:1.6;font-weight:500}.answer-explanation{margin-top:1.5rem;padding:1rem;border-radius:8px;font-size:.95rem}.explanation-correct{background:#d4edda;color:#155724;border:1px solid #c3e6cb}.explanation-incorrect{background:#f8d7da;color:#721c24;border:1px solid #f5c6cb}.explanation-incorrect span{display:inline-block;margin-top:.5rem}.ai-explanation{margin-top:1rem;padding:1rem;background:#e3f2fd;border-radius:6px;border-left:4px solid #3498db}.ai-explanation h5{margin:0 0 .5rem;color:#3498db;font-size:1rem;font-weight:600}.ai-explanation p{margin:0;color:#34495e;line-height:1.6;font-size:.95rem}.all-questions-list{margin-top:2rem}.all-questions-list h4{color:#2c3e50;margin-bottom:1rem}.question-summary{display:flex;gap:1rem;padding:1rem;background:#fff;border-radius:8px;margin-bottom:.75rem;border-left:4px solid transparent;transition:all .2s}.question-summary.correct{border-left-color:#27ae60}.question-summary.incorrect{border-left-color:#e74c3c}.question-summary:hover{box-shadow:0 2px 8px #0000001a}.question-number{display:flex;flex-direction:column;align-items:center;gap:.5rem;min-width:60px}.number-badge{font-weight:700;color:#7f8c8d}.result-icon{width:24px;height:24px;border-radius:50%;display:flex;align-items:center;justify-content:center;font-weight:700}.result-icon.correct{background:#27ae60;color:#fff}.result-icon.incorrect{background:#e74c3c;color:#fff}.question-info{flex:1}.question-preview{color:#2c3e50;margin-bottom:.5rem}.answer-comparison{display:flex;gap:2rem;font-size:.9rem}.your-answer{color:#3498db}.correct-answer{color:#27ae60}.results-actions{display:flex;justify-content:center;align-items:stretch;gap:1rem;margin-top:2rem}.back-button,.retry-button{padding:.75rem 2rem;border:none;border-radius:8px;font-size:1rem;cursor:pointer;transition:all .2s;font-weight:500;height:44px;display:flex;align-items:center;justify-content:center;flex:0 0 auto}.back-button{background:#95a5a6;color:#fff}.back-button:hover{background:#7f8c8d;transform:translateY(-2px)}.retry-button{background:#3498db;color:#fff}.retry-button:hover{background:#2980b9;transform:translateY(-2px)}@keyframes fadeIn{0%{opacity:0;transform:translateY(20px)}to{opacity:1;transform:translateY(0)}}@media (max-width: 768px){.score-card{flex-direction:column;gap:2rem}.score-details{width:100%}.questions-grid{grid-template-columns:repeat(auto-fill,minmax(40px,1fr))}.question-bubble{width:40px;height:40px;font-size:.9rem}.answer-comparison{flex-direction:column;gap:.5rem}.results-actions{flex-direction:column}.results-actions button{width:100%}}.student-dashboard{min-height:100vh;background:var(--bg-secondary)}.student-header{background:var(--bg-primary);border-bottom:1px solid var(--border-light);padding:0 20px;box-shadow:0 1px 2px #0000000a}.header-content{display:flex;justify-content:space-between;align-items:center;max-width:1200px;margin:0 auto;padding:20px 0}.header-content h1{color:#333;margin:0;font-size:1.8rem}.header-actions{display:flex;align-items:center;gap:20px}.user-info{color:#666;font-size:.9rem}.logout-button{background:#dc3545;color:#fff;border:none;padding:8px 16px;border-radius:6px;cursor:pointer;font-size:.9rem}.logout-button:hover{background:#c82333}.student-content{max-width:1200px;margin:0 auto;padding:20px}.error-message{background:#fee;color:#c33;padding:12px 16px;border-radius:8px;border:1px solid #fcc;margin-bottom:20px;display:flex;justify-content:space-between;align-items:center}.error-message button{background:none;border:none;color:#c33;cursor:pointer;font-size:1.2rem}.breadcrumb{margin-bottom:20px;font-size:.9rem;color:#666}.breadcrumb-link{background:none;border:none;color:var(--primary-500);cursor:pointer;text-decoration:underline}.breadcrumb-link:hover{color:var(--primary-700)}.dashboard-main{background:var(--bg-primary);border-radius:var(--radius-lg);border:1px solid var(--border-light);padding:24px;box-shadow:var(--shadow-card);margin-bottom:8px}.quick-stats{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:20px;margin-bottom:40px}.stat-card{background:var(--bg-primary);border:1px solid var(--border-light);color:#000000e6;padding:20px;border-radius:var(--radius-lg);text-align:center;box-shadow:var(--shadow-card);transition:all var(--transition-base);cursor:pointer}.stat-card:hover{box-shadow:var(--shadow-card-hover);border-color:var(--border-medium)}.stat-number{font-size:2rem;font-weight:600;margin-bottom:4px;color:#000000e6;line-height:1.33333}.stat-label{font-size:.875rem;color:#0009;font-weight:400;line-height:1.42857}.categories-section h2{margin-bottom:20px;color:#333}.categories-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:20px;margin-bottom:40px}.category-card{background:#fff;border:2px solid #e1e5e9;border-radius:12px;padding:24px;cursor:pointer;transition:all .2s ease;box-shadow:0 2px 4px #0000000d}.category-card:hover{border-color:var(--primary-500);transform:translateY(-2px);box-shadow:0 4px 12px #0000001a}.category-name{font-size:1.2rem;font-weight:600;color:#333;margin-bottom:8px}.category-description{color:#666;margin-bottom:12px;font-size:.9rem}.category-stats{color:var(--primary-600);font-weight:500;font-size:.9rem}.no-categories{text-align:center;padding:40px;color:#666;background:#f8f9fa;border-radius:8px;border:2px dashed #ddd}.recent-results h2{margin-bottom:20px;color:#333}.results-list{display:flex;flex-direction:column;gap:12px}.result-item{display:flex;justify-content:space-between;align-items:center;padding:20px;background:#f8f9fa;border-radius:12px;border-left:4px solid var(--primary-500)}.result-info{flex:1}.result-exam{font-weight:600;color:#333;margin-bottom:4px}.result-mode{font-size:.8rem;color:#666;margin-bottom:2px}.result-date{font-size:.8rem;color:#999}.result-score{text-align:center}.score{font-size:1.5rem;font-weight:700;margin-bottom:4px}.score.pass{color:#28a745}.score.fail{color:#dc3545}.score-detail{font-size:.8rem;color:#666}.category-exams{background:#fff;border-radius:12px;padding:30px;box-shadow:0 2px 4px #0000001a}.exams-header{margin-bottom:30px}.exams-header h2{color:#333;margin-bottom:8px}.exams-header p{color:#666;margin:0}.exams-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:20px}.exam-card{background:#f8f9fa;border:2px solid #e1e5e9;border-radius:12px;padding:20px;cursor:pointer;transition:all .2s ease}.exam-card:hover{border-color:var(--primary-500);transform:translateY(-2px);box-shadow:0 4px 12px #0000001a}.exam-name{font-size:1.1rem;font-weight:600;color:#333;margin-bottom:12px}.exam-stats{display:flex;flex-direction:column;gap:6px}.stat{display:flex;justify-content:space-between;font-size:.9rem}.stat-label{color:#666}.stat-value{color:#333;font-weight:500}.no-exams{text-align:center;padding:40px;color:#666;background:#f8f9fa;border-radius:8px;border:2px dashed #ddd}.exam-mode-section{background:#fff;border-radius:12px;padding:30px;box-shadow:0 2px 4px #0000001a}.loading-container{display:flex;flex-direction:column;align-items:center;justify-content:center;min-height:200px;color:#666}.loading-spinner{width:40px;height:40px;border:3px solid #f3f3f3;border-top:3px solid var(--primary-500);border-radius:50%;animation:spin 1s linear infinite;margin-bottom:16px}@media (max-width: 768px){.student-content{padding:10px}.header-content{flex-direction:column;gap:15px;text-align:center}.quick-stats,.categories-grid,.exams-grid{grid-template-columns:1fr}.result-item{flex-direction:column;align-items:flex-start;gap:12px}.result-score{align-self:flex-end}}.exam-results-placeholder{background:#fff;padding:24px;border-radius:12px;box-shadow:0 2px 12px #0000001a;text-align:center;margin-bottom:24px}.exam-mode-selector-placeholder{background:#fff;padding:24px;border-radius:12px;box-shadow:0 2px 12px #0000001a;margin-bottom:24px}.mode-buttons{display:flex;gap:16px;justify-content:center;margin-top:20px}.mode-button{padding:12px 24px;border:none;border-radius:8px;font-size:16px;cursor:pointer;transition:all .3s ease;font-weight:500}.mode-button.practice{background:#f0f9ff;color:#0369a1;border:2px solid #0369a1}.mode-button.practice:hover{background:#0369a1;color:#fff}.mode-button.exam{background:#fef3c7;color:#d97706;border:2px solid #d97706}.mode-button.exam:hover{background:#d97706;color:#fff}.app-loading{display:flex;flex-direction:column;align-items:center;justify-content:center;min-height:100vh;background:#f5f6fa;color:#666}.loading-spinner{width:50px;height:50px;border:4px solid #f3f3f3;border-top:4px solid var(--primary-500);border-radius:50%;animation:spin 1s linear infinite;margin-bottom:20px}@keyframes spin{0%{transform:rotate(0)}to{transform:rotate(360deg)}}.access-denied{display:flex;align-items:center;justify-content:center;min-height:100vh;background:#f5f6fa;padding:20px}.access-denied-content{background:#fff;border-radius:12px;padding:40px;text-align:center;box-shadow:0 4px 12px #0000001a;max-width:400px}.access-denied-content h2{color:#dc3545;margin-bottom:16px}.access-denied-content p{color:#666;margin-bottom:12px}.unknown-role{display:flex;align-items:center;justify-content:center;min-height:100vh;background:#f5f6fa;padding:20px}.unknown-role-content{background:#fff;border-radius:12px;padding:40px;text-align:center;box-shadow:0 4px 12px #0000001a;max-width:400px}.unknown-role-content h2{color:#ffc107;margin-bottom:16px}.unknown-role-content p{color:#666;margin-bottom:12px}.app{min-height:100vh}.App{min-height:100vh;background:#f5f7fa}.app-header{background:#2c3e50;color:#fff;padding:1.5rem 2rem;box-shadow:0 2px 8px #0000001a}.app-header h1{margin:0;font-size:1.8rem;text-align:center}.app-main{min-height:calc(100vh - 80px);padding:2rem 0}
