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var(--border-color)}.course-reviews>h2{margin-bottom:var(--spacing-lg);color:var(--text-primary)}.reviews-empty{text-align:center;padding:var(--spacing-xl);color:var(--text-secondary)}@media(max-width:768px){.reviews-summary{flex-direction:column;gap:var(--spacing-lg)}.overall-rating{min-width:unset}.rating-score{font-size:2.5rem}}.certificates-container{max-width:1200px;margin:0 auto}.certificates-header{background:linear-gradient(135deg,var(--color-primary),var(--color-primary-dark));padding:var(--spacing-xl);border-radius:var(--radius-lg);color:#fff;margin-bottom:var(--spacing-xl)}.certificates-header-content{display:flex;align-items:center;gap:var(--spacing-lg);margin-bottom:var(--spacing-lg)}.certificates-icon-wrapper{width:80px;height:80px;background:#fff3;border-radius:50%;display:flex;align-items:center;justify-content:center;flex-shrink:0}.certificates-header-icon{color:#fff}.certificates-header 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var(--spacing-sm);background:#28a7451a;color:var(--color-success);border-radius:var(--radius-sm);font-size:.875rem;font-weight:600;width:fit-content}.certificate-card-footer{padding:0 var(--spacing-lg) var(--spacing-lg)}.certificate-template{width:100%;max-width:800px;margin:0 auto;aspect-ratio:297 / 210;background:#fff;position:relative}.certificate-border{position:absolute;inset:10px;border:3px solid var(--color-primary);display:flex;flex-direction:column;padding:var(--spacing-xl)}.certificate-border:before{content:"";position:absolute;inset:5px;border:1px solid #ccc;pointer-events:none}.certificate-header{text-align:center;margin-bottom:var(--spacing-lg)}.certificate-icon{color:var(--color-primary);margin-bottom:var(--spacing-sm)}.certificate-main-title{font-family:Georgia,Times New Roman,serif;font-size:2.5rem;color:#333;margin:0;font-weight:700}.certificate-divider{width:200px;height:2px;background:var(--color-primary);margin:var(--spacing-md) 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skeleton-loading{0%{background-position:200% 0}to{background-position:-200% 0}}.skeleton-header{height:120px;margin-bottom:var(--spacing-lg)}.skeleton-card{background:var(--bg-primary);border-radius:var(--radius-lg);box-shadow:var(--shadow-sm);padding:var(--spacing-lg)}.skeleton-title{height:24px;width:60%;margin-bottom:var(--spacing-md)}.skeleton-text{height:16px;width:100%;margin-bottom:var(--spacing-sm)}.skeleton-text:last-child{width:80%}.skip-link{position:absolute;top:-40px;left:0;background:var(--color-primary);color:#fff;padding:var(--spacing-sm) var(--spacing-md);text-decoration:none;font-weight:600;z-index:calc(var(--z-toast) + 1);border-radius:0 0 var(--radius-md) 0;transition:top var(--duration-fast) var(--ease-out)}.skip-link:focus{top:0}.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border-width:0}:root{--color-primary: #FF9900;--color-primary-dark: #EC7211;--color-primary-light: #FFAC31;--bg-primary: #ffffff;--bg-secondary: #f5f5f5;--bg-tertiary: #e9ecef;--text-primary: #1a1a1a;--text-secondary: #6c757d;--text-tertiary: #adb5bd;--color-success: #28a745;--color-danger: #dc3545;--color-warning: #ffc107;--color-info: #17a2b8;--border-color: #dee2e6;--shadow-sm: 0 2px 4px rgba(0, 0, 0, .1);--shadow-md: 0 4px 6px rgba(0, 0, 0, .1);--shadow-lg: 0 10px 15px rgba(0, 0, 0, .1);--spacing-xs: .25rem;--spacing-sm: .5rem;--spacing-md: 1rem;--spacing-lg: 1.5rem;--spacing-xl: 2rem;--radius-sm: .25rem;--radius-md: .5rem;--radius-lg: 1rem;--transition: all .3s ease;--z-base: 0;--z-sidebar: 200;--z-navbar: 300;--z-sticky: 400;--z-dropdown: 500;--z-modal-backdrop: 1000;--z-modal: 1001;--z-toast: 1030;--sidebar-width: 280px;--navbar-height: 64px;--color-focus: #0066CC;--color-focus-ring: rgba(0, 102, 204, .3);--badge-danger: #dc3545;--color-overlay: rgba(0, 0, 0, .5);--duration-fast: .15s;--duration-base: .3s;--duration-slow: .5s;--ease-out: cubic-bezier(0, 0, .2, 1);--ease-in-out: cubic-bezier(.4, 0, .2, 1)}[data-theme=dark]{--bg-primary: #1a1a1a;--bg-secondary: #2d2d2d;--bg-tertiary: #3d3d3d;--text-primary: #ffffff;--text-secondary: #b0b0b0;--text-tertiary: #808080;--border-color: #404040;--shadow-sm: 0 2px 4px rgba(0, 0, 0, .3);--shadow-md: 0 4px 6px rgba(0, 0, 0, .3);--shadow-lg: 0 10px 15px rgba(0, 0, 0, .3)}*{margin:0;padding:0;box-sizing:border-box}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Oxygen,Ubuntu,Cantarell,Fira Sans,Droid Sans,Helvetica Neue,sans-serif;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;background-color:var(--bg-secondary);color:var(--text-primary);line-height:1.6;transition:var(--transition);overflow-x:hidden}#root{min-height:100vh}.btn{display:inline-flex;align-items:center;justify-content:center;gap:.5rem;padding:.75rem 1.5rem;border:none;border-radius:var(--radius-md);font-size:1rem;font-weight:500;cursor:pointer;transition:var(--transition);text-decoration:none}.btn:hover{transform:translateY(-2px);box-shadow:var(--shadow-md)}.btn:active{transform:translateY(0)}.btn-primary{background-color:var(--color-primary);color:#fff}.btn-primary:hover{background-color:var(--color-primary-dark)}.btn-secondary{background-color:var(--bg-tertiary);color:var(--text-primary)}.btn-success{background-color:var(--color-success);color:#fff}.btn-danger{background-color:var(--color-danger);color:#fff}.btn-outline{background-color:transparent;color:var(--text-primary);border:2px solid var(--border-color)}.btn-outline:hover{background-color:var(--bg-tertiary);border-color:var(--color-primary)}.btn-sm{padding:.5rem 1rem;font-size:.875rem}.btn-md{padding:.75rem 1.5rem;font-size:1rem}.btn-lg{padding:1rem 2rem;font-size:1.125rem}.btn-full{width:100%}.btn-disabled{opacity:.5;cursor:not-allowed;pointer-events:none}.btn-icon{flex-shrink:0}.card{background-color:var(--bg-primary);border-radius:var(--radius-lg);box-shadow:var(--shadow-sm);overflow:hidden;transition:var(--transition)}.card:hover{box-shadow:var(--shadow-md)}.card-header{padding:var(--spacing-lg);border-bottom:1px solid var(--border-color);font-weight:600;font-size:1.125rem}.card-body{padding:var(--spacing-lg)}.progress-bar-container{width:100%;margin:var(--spacing-lg) 0}.progress-label{font-size:.875rem;color:var(--text-secondary);margin-bottom:var(--spacing-sm);text-align:center}.progress-bar{width:100%;height:2rem;background-color:var(--bg-tertiary);border-radius:var(--radius-md);overflow:hidden;position:relative}.progress-bar-fill{height:100%;background:linear-gradient(90deg,var(--color-primary),var(--color-primary-light));display:flex;align-items:center;justify-content:center;transition:width .5s ease;position:relative}.progress-percentage{font-size:.875rem;font-weight:600;color:#fff;position:absolute;left:50%;transform:translate(-50%)}.modal-overlay{position:fixed;inset:0;background-color:#00000080;display:flex;align-items:center;justify-content:center;z-index:1000;padding:var(--spacing-lg)}.modal-content{background-color:var(--bg-primary);border-radius:var(--radius-lg);max-width:600px;width:100%;max-height:90vh;overflow-y:auto;box-shadow:var(--shadow-lg)}.modal-header{display:flex;align-items:center;justify-content:space-between;padding:var(--spacing-lg);border-bottom:1px solid var(--border-color)}.modal-title{font-size:1.5rem;font-weight:600}.modal-close{background:none;border:none;cursor:pointer;color:var(--text-secondary);transition:var(--transition)}.modal-close:hover{color:var(--text-primary)}.modal-body{padding:var(--spacing-lg)}.modal-footer{padding:var(--spacing-lg);border-top:1px solid var(--border-color);display:flex;gap:var(--spacing-md);justify-content:flex-end}.login-container{min-height:100vh;display:flex;flex-direction:column;align-items:center;justify-content:center;padding:var(--spacing-lg);gap:var(--spacing-xl)}.login-card{max-width:400px;width:100%}.login-header{text-align:center;margin-bottom:var(--spacing-xl)}.aws-logo{margin-bottom:var(--spacing-lg)}.aws-logo img{height:60px}.login-header h1{font-size:2rem;margin-bottom:var(--spacing-sm);background:linear-gradient(135deg,var(--color-primary),var(--color-primary-dark));-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}.login-header p{color:var(--text-secondary)}.login-form{display:flex;flex-direction:column;gap:var(--spacing-lg)}.form-group{display:flex;flex-direction:column;gap:var(--spacing-sm)}.form-group label{display:flex;align-items:center;gap:var(--spacing-sm);font-weight:500;color:var(--text-primary)}.form-input{padding:.75rem 1rem;border:2px solid var(--border-color);border-radius:var(--radius-md);font-size:1rem;background-color:var(--bg-primary);color:var(--text-primary);transition:var(--transition)}.form-input:focus{outline:none;border-color:var(--color-primary);box-shadow:0 0 0 3px #ff99001a}.error-message{padding:var(--spacing-md);background-color:#fee;color:var(--color-danger);border-radius:var(--radius-md);font-size:.875rem;border-left:4px solid var(--color-danger)}.login-hint{text-align:center;font-size:.875rem;color:var(--text-secondary)}.login-stats{display:flex;gap:var(--spacing-xl);justify-content:center}.stat-item{text-align:center}.stat-number{font-size:2rem;font-weight:700;color:var(--color-primary)}.stat-label{font-size:.875rem;color:var(--text-secondary)}.dashboard-container{min-height:100vh;padding:var(--spacing-xl);width:100%}.dashboard-header{margin-bottom:var(--spacing-xl)}.header-content{display:flex;align-items:center;justify-content:space-between;gap:var(--spacing-lg);flex-wrap:wrap}.user-info{display:flex;align-items:center;gap:var(--spacing-lg)}.user-avatar{width:60px;height:60px;border-radius:50%;background:linear-gradient(135deg,var(--color-primary),var(--color-primary-dark));color:#fff;display:flex;align-items:center;justify-content:center;font-size:1.5rem;font-weight:600}.user-greeting{font-size:2rem;margin-bottom:var(--spacing-xs)}.user-subtitle{color:var(--text-secondary)}.header-actions{display:flex;gap:var(--spacing-md)}.dashboard-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:var(--spacing-lg);margin-bottom:var(--spacing-xl)}.quick-start-card{grid-column:span 1;background:linear-gradient(135deg,var(--color-primary),var(--color-primary-dark))}.quick-start-content{padding:var(--spacing-xl);text-align:center;color:#fff}.quick-start-icon{margin:0 auto var(--spacing-lg)}.quick-start-content h2{font-size:1.5rem;margin-bottom:var(--spacing-sm)}.quick-start-content p{margin-bottom:var(--spacing-lg);opacity:.9}.stats-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:var(--spacing-lg)}.stat-item{display:flex;align-items:center;gap:var(--spacing-md);padding:var(--spacing-md);background-color:var(--bg-secondary);border-radius:var(--radius-md);transition:var(--transition)}.stat-item:hover{background-color:var(--bg-tertiary);transform:translateY(-2px);box-shadow:var(--shadow-sm)}.stat-icon{width:48px;height:48px;border-radius:var(--radius-md);display:flex;align-items:center;justify-content:center;color:#fff;flex-shrink:0}.stat-primary{background-color:var(--color-primary)}.stat-success{background-color:var(--color-success)}.stat-info{background-color:var(--color-info)}.stat-warning{background-color:var(--color-warning)}.stat-info{flex:1}.stat-value{font-size:1.5rem;font-weight:700;color:var(--text-primary);line-height:1.2}.stat-label{font-size:.875rem;color:var(--text-primary);opacity:.8;font-weight:500}.question-bank-stats{display:flex;justify-content:space-around;gap:var(--spacing-md)}.bank-stat{text-align:center}.bank-number{font-size:2rem;font-weight:700;color:var(--color-primary)}.bank-label{font-size:.875rem;color:var(--text-secondary)}.history-list{display:flex;flex-direction:column;gap:var(--spacing-md)}.history-item{display:flex;align-items:center;gap:var(--spacing-md);padding:var(--spacing-md);border-radius:var(--radius-md);background-color:var(--bg-secondary);transition:var(--transition)}.history-item:hover{background-color:var(--bg-tertiary)}.history-icon{width:40px;height:40px;border-radius:50%;background-color:var(--bg-tertiary);display:flex;align-items:center;justify-content:center;color:var(--color-primary)}.history-info{flex:1}.history-score{font-weight:600;color:var(--text-primary)}.history-date{font-size:.875rem;color:var(--text-secondary)}.history-badge{padding:.25rem .75rem;border-radius:var(--radius-sm);font-size:.75rem;font-weight:600}.badge-success{background-color:#d4edda;color:var(--color-success)}.badge-warning{background-color:#fff3cd;color:#856404}.empty-state{text-align:center;padding:var(--spacing-xl);color:var(--text-secondary)}.empty-icon{margin:0 auto var(--spacing-lg);opacity:.5}.dashboard-actions{display:flex;gap:var(--spacing-md);justify-content:center;flex-wrap:wrap}.quiz-container{min-height:100vh;padding:var(--spacing-xl);max-width:1200px;margin:0 auto;width:100%}.quiz-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:var(--spacing-lg)}.quiz-score{font-size:1.25rem;font-weight:600;color:var(--text-primary)}.question-card{margin:var(--spacing-xl) 0}.question-header{display:flex;justify-content:space-between;align-items:flex-start;gap:var(--spacing-lg);margin-bottom:var(--spacing-xl)}.question-text{font-size:1.25rem;line-height:1.6;flex:1}.question-type-badge{padding:.25rem .75rem;background-color:var(--color-info);color:#fff;border-radius:var(--radius-sm);font-size:.75rem;font-weight:600;white-space:nowrap}.question-options{display:flex;flex-direction:column;gap:var(--spacing-md);margin-bottom:var(--spacing-xl)}.question-option{padding:var(--spacing-lg);border:2px solid var(--border-color);border-radius:var(--radius-md);background-color:var(--bg-primary);cursor:pointer;transition:var(--transition);display:flex;align-items:center;justify-content:space-between;gap:var(--spacing-md);text-align:left}.question-option:hover:not(:disabled){border-color:var(--color-primary);background-color:var(--bg-secondary);transform:translate(4px)}.question-option.selected{border-color:var(--color-primary);background-color:#ff99001a}.question-option.correct{border-color:var(--color-success);background-color:#28a7451a}.question-option.incorrect{border-color:var(--color-danger);background-color:#dc35451a}.question-option:disabled{cursor:not-allowed}.option-content{display:flex;align-items:center;gap:var(--spacing-md);flex:1}.option-letter{width:32px;height:32px;border-radius:50%;background-color:var(--bg-tertiary);display:flex;align-items:center;justify-content:center;font-weight:600;flex-shrink:0}.option-text{flex:1}.option-icon{flex-shrink:0}.icon-correct{color:var(--color-success)}.icon-incorrect{color:var(--color-danger)}.question-actions{margin-top:var(--spacing-lg)}.quiz-navigation{margin-top:var(--spacing-xl)}.feedback-message{padding:var(--spacing-lg);border-radius:var(--radius-md);display:flex;gap:var(--spacing-lg);margin-top:var(--spacing-xl)}.feedback-correct{background-color:#28a7451a;border-left:4px solid var(--color-success)}.feedback-incorrect{background-color:#dc35451a;border-left:4px solid var(--color-danger)}.feedback-icon{flex-shrink:0}.feedback-correct .feedback-icon{color:var(--color-success)}.feedback-incorrect .feedback-icon{color:var(--color-danger)}.feedback-content{flex:1}.feedback-title{font-size:1.125rem;font-weight:600;margin-bottom:var(--spacing-sm)}.feedback-text{color:var(--text-secondary)}.quiz-error-container{max-width:600px;margin:var(--spacing-xl) auto;padding:var(--spacing-xl);background:var(--bg-primary);border-radius:var(--radius-lg);border:2px solid var(--color-warning);box-shadow:var(--shadow-md);text-align:center}.quiz-error-icon{display:flex;justify-content:center;align-items:center;width:80px;height:80px;margin:0 auto var(--spacing-lg);background:#ffc1071a;border-radius:50%;color:var(--color-warning)}.quiz-error-title{font-size:1.5rem;font-weight:700;color:var(--text-primary);margin:0 0 var(--spacing-md) 0}.quiz-error-message{font-size:1rem;color:var(--text-secondary);margin:0 0 var(--spacing-lg) 0;line-height:1.6}.quiz-error-details{background:var(--bg-secondary);border-radius:var(--radius-md);padding:var(--spacing-lg);margin-bottom:var(--spacing-xl);text-align:left}.quiz-error-description{font-size:.9375rem;color:var(--text-secondary);margin:0 0 var(--spacing-md) 0;line-height:1.6}.quiz-error-technical{padding:var(--spacing-sm) var(--spacing-md);background:var(--bg-tertiary);border-radius:var(--radius-sm);border-left:3px solid var(--color-warning);font-size:.875rem;color:var(--text-secondary)}.quiz-error-technical code{font-family:Courier New,monospace;background:#0000000d;padding:.125rem .375rem;border-radius:var(--radius-sm);color:var(--color-danger);font-weight:600}[data-theme=dark] .quiz-error-technical code{background:#ffffff1a;color:var(--color-warning)}.quiz-error-actions{display:flex;gap:var(--spacing-md);justify-content:center;flex-wrap:wrap}@media(max-width:768px){.quiz-error-container{margin:var(--spacing-md);padding:var(--spacing-lg)}.quiz-error-actions{flex-direction:column;width:100%}.quiz-error-actions .btn{width:100%}}.results-container{min-height:100vh;padding:var(--spacing-xl);max-width:1200px;margin:0 auto;width:100%}.results-card{margin-bottom:var(--spacing-xl)}.results-header{text-align:center;padding:var(--spacing-xl);border-radius:var(--radius-lg) var(--radius-lg) 0 0;color:#fff}.results-success{background:linear-gradient(135deg,var(--color-success),#20c997)}.results-good{background:linear-gradient(135deg,var(--color-info),#138496)}.results-warning{background:linear-gradient(135deg,var(--color-warning),#e0a800)}.results-danger{background:linear-gradient(135deg,var(--color-danger),#c82333)}.results-trophy{margin-bottom:var(--spacing-lg)}.results-title{font-size:2rem;margin-bottom:var(--spacing-lg)}.results-score{display:flex;align-items:baseline;justify-content:center;gap:var(--spacing-sm);font-size:3rem;font-weight:700;margin-bottom:var(--spacing-md)}.score-divider{opacity:.7}.results-percentage{font-size:2rem;margin-bottom:var(--spacing-sm)}.results-performance{font-size:1.25rem;opacity:.9}.results-stats{display:grid;grid-template-columns:repeat(3,1fr);gap:var(--spacing-lg);padding:var(--spacing-xl)}.stat-box{text-align:center}.stat-correct{color:var(--color-success)}.stat-incorrect{color:var(--color-danger)}.stat-percentage{color:var(--color-primary)}.results-actions{padding:var(--spacing-xl);display:flex;flex-direction:column;gap:var(--spacing-md)}.answers-review-card{margin-top:var(--spacing-xl)}.answers-list{display:flex;flex-direction:column;gap:var(--spacing-md)}.answer-item{padding:var(--spacing-lg);border-radius:var(--radius-md);border-left:4px solid}.answer-correct{background-color:#28a7451a;border-color:var(--color-success)}.answer-incorrect{background-color:#dc35451a;border-color:var(--color-danger)}.answer-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:var(--spacing-sm)}.answer-number{font-size:.875rem;font-weight:600;color:var(--text-secondary)}.answer-icon{flex-shrink:0}.answer-question{font-weight:600;margin-bottom:var(--spacing-md)}.answer-details{display:flex;flex-direction:column;gap:var(--spacing-sm)}.answer-row{display:flex;gap:var(--spacing-md)}.answer-label{font-weight:500;color:var(--text-secondary);min-width:120px}.answer-correct-text{color:var(--color-success);font-weight:500}.answer-wrong-text{color:var(--color-danger);font-weight:500}.feedback-explanation,.answer-explanation{margin-top:var(--spacing-lg);padding:var(--spacing-md);background-color:var(--bg-secondary);border-radius:var(--radius-md);border-left:4px solid var(--color-info)}.explanation-header{display:flex;align-items:center;justify-content:space-between;gap:var(--spacing-md);margin-bottom:var(--spacing-sm)}.explanation-title{font-weight:600;color:var(--text-primary);display:flex;align-items:center;gap:var(--spacing-sm);flex:1}.explanation-text{color:var(--text-secondary);line-height:1.6;font-size:.9375rem}.audio-button{display:flex;align-items:center;gap:var(--spacing-sm);padding:var(--spacing-sm) var(--spacing-md);background-color:var(--color-info);color:#fff;border:none;border-radius:var(--radius-md);cursor:pointer;font-size:.875rem;font-weight:500;transition:var(--transition);white-space:nowrap}.audio-button:hover{background-color:#138496;transform:translateY(-1px);box-shadow:var(--shadow-sm)}.audio-button:active{transform:translateY(0)}.audio-button-active{background-color:var(--color-danger);animation:pulse 1.5s ease-in-out infinite}.audio-button-active:hover{background-color:#c82333}.audio-button-icon{display:flex;align-items:center;justify-content:center}.audio-button-label{font-size:.875rem}@keyframes pulse{0%,to{opacity:1}50%{opacity:.8}}.stats-container{min-height:100vh;padding:var(--spacing-xl);max-width:1400px;margin:0 auto;width:100%}.stats-header{display:flex;align-items:center;gap:var(--spacing-lg);margin-bottom:var(--spacing-xl)}.stats-header h1{font-size:2rem}.stats-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(300px,1fr));gap:var(--spacing-lg)}.summary-stats{display:grid;grid-template-columns:repeat(2,1fr);gap:var(--spacing-lg)}.summary-item{display:flex;align-items:center;gap:var(--spacing-md)}.summary-icon{width:56px;height:56px;border-radius:var(--radius-md);display:flex;align-items:center;justify-content:center;color:#fff;flex-shrink:0}.summary-content{flex:1}.summary-value{font-size:2rem;font-weight:700;color:var(--text-primary)}.summary-label{font-size:.875rem;color:var(--text-secondary)}.performance-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(120px,1fr));gap:var(--spacing-md)}.performance-item{text-align:center;padding:var(--spacing-md);border-radius:var(--radius-md);background-color:var(--bg-secondary)}.performance-label{font-size:.875rem;color:var(--text-secondary);margin-bottom:var(--spacing-sm)}.performance-value{font-size:1.5rem;font-weight:700;display:flex;align-items:center;justify-content:center;gap:var(--spacing-sm)}.performance-best{color:var(--color-success)}.performance-worst{color:var(--color-danger)}.performance-up{color:var(--color-success)}.performance-down{color:var(--color-danger)}.streak-content{display:flex;justify-content:space-around;gap:var(--spacing-lg);padding:var(--spacing-lg) 0}.streak-item{display:flex;align-items:center;gap:var(--spacing-md)}.streak-icon{font-size:3rem}.streak-value{font-size:2rem;font-weight:700;color:var(--text-primary)}.streak-label{font-size:.875rem;color:var(--text-secondary)}.streak-note{padding:var(--spacing-md);background-color:var(--bg-secondary);border-radius:var(--radius-md);font-size:.875rem;color:var(--text-secondary);text-align:center}.activity-info{display:flex;align-items:center;gap:var(--spacing-lg)}.activity-icon{color:var(--color-primary)}.activity-label{font-size:.875rem;color:var(--text-secondary)}.activity-date{font-weight:600;color:var(--text-primary)}.activity-empty{text-align:center;padding:var(--spacing-xl);color:var(--text-secondary)}.accuracy-content{padding:var(--spacing-md)}.accuracy-stat{margin-bottom:var(--spacing-lg)}.accuracy-label{font-size:.875rem;color:var(--text-secondary);margin-bottom:var(--spacing-sm)}.accuracy-bar{width:100%;height:2rem;background-color:var(--bg-tertiary);border-radius:var(--radius-md);overflow:hidden;margin-bottom:var(--spacing-sm)}.accuracy-fill{height:100%;background:linear-gradient(90deg,var(--color-primary),var(--color-primary-light));transition:width .5s ease}.accuracy-value{font-size:1.5rem;font-weight:700;color:var(--color-primary);text-align:center}.accuracy-details{display:flex;flex-direction:column;gap:var(--spacing-sm)}.accuracy-detail{display:flex;justify-content:space-between;padding:var(--spacing-sm);background-color:var(--bg-secondary);border-radius:var(--radius-sm)}.glossary-container{min-height:100vh;padding:var(--spacing-xl);max-width:1400px;margin:0 auto;width:100%}.glossary-header{margin-bottom:var(--spacing-xl)}.glossary-title-section{display:flex;align-items:center;gap:var(--spacing-lg)}.glossary-icon{color:var(--color-primary)}.glossary-subtitle{color:var(--text-secondary);margin-top:var(--spacing-xs)}.glossary-search-card{margin-bottom:var(--spacing-xl)}.search-section{padding:var(--spacing-lg)}.search-input-wrapper{position:relative;margin-bottom:var(--spacing-md)}.search-icon{position:absolute;left:var(--spacing-md);top:50%;transform:translateY(-50%);color:var(--text-secondary)}.search-input{width:100%;padding:var(--spacing-md) var(--spacing-md) var(--spacing-md) calc(var(--spacing-md) * 3);border:2px solid var(--border-color);border-radius:var(--radius-md);font-size:1rem;background-color:var(--bg-primary);color:var(--text-primary);transition:var(--transition)}.search-input:focus{outline:none;border-color:var(--color-primary);box-shadow:0 0 0 3px #ff99001a}.search-clear{position:absolute;right:var(--spacing-md);top:50%;transform:translateY(-50%);background:none;border:none;font-size:1.5rem;color:var(--text-secondary);cursor:pointer;padding:0 var(--spacing-sm);transition:var(--transition)}.search-clear:hover{color:var(--text-primary)}.search-controls{display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:var(--spacing-md)}.search-results-count{color:var(--text-secondary);font-size:.875rem}.expand-controls{display:flex;gap:var(--spacing-sm)}.control-btn{display:flex;align-items:center;gap:var(--spacing-xs);padding:var(--spacing-sm) var(--spacing-md);background-color:var(--bg-secondary);border:1px solid var(--border-color);border-radius:var(--radius-sm);color:var(--text-primary);font-size:.875rem;cursor:pointer;transition:var(--transition)}.control-btn:hover{background-color:var(--bg-tertiary);border-color:var(--color-primary)}.glossary-items{display:flex;flex-direction:column;gap:var(--spacing-md)}.glossary-item{overflow:hidden;transition:var(--transition)}.glossary-item:hover{box-shadow:var(--shadow-lg)}.glossary-item-header{display:flex;justify-content:space-between;align-items:center;gap:var(--spacing-md);padding:var(--spacing-lg);cursor:pointer;transition:var(--transition)}.glossary-item-header:hover{background-color:var(--bg-secondary)}.item-header-content{display:flex;align-items:center;gap:var(--spacing-md);flex:1}.item-number{font-weight:700;color:var(--color-primary);font-size:.875rem;min-width:40px}.item-question{font-size:1rem;font-weight:600;color:var(--text-primary);margin:0}.expand-button{background:none;border:none;color:var(--text-secondary);cursor:pointer;padding:var(--spacing-sm);display:flex;align-items:center;justify-content:center;transition:var(--transition);border-radius:var(--radius-sm)}.expand-button:hover{background-color:var(--bg-tertiary);color:var(--color-primary)}.glossary-item-content{padding:0 var(--spacing-lg) var(--spacing-lg);border-top:1px solid var(--border-color);padding-top:var(--spacing-lg)}.item-section{margin-bottom:var(--spacing-lg)}.item-section:last-child{margin-bottom:0}.section-title{font-size:.875rem;font-weight:600;color:var(--text-secondary);margin-bottom:var(--spacing-md);text-transform:uppercase;letter-spacing:.5px}.options-list{display:flex;flex-direction:column;gap:var(--spacing-sm)}.option-item{display:flex;align-items:center;gap:var(--spacing-md);padding:var(--spacing-md);border-radius:var(--radius-md);background-color:var(--bg-secondary);transition:var(--transition)}.option-normal{border:2px solid transparent}.option-correct{border:2px solid var(--color-success);background-color:#28a7450d}.option-item .option-letter{width:28px;height:28px;border-radius:50%;background-color:var(--bg-tertiary);display:flex;align-items:center;justify-content:center;font-weight:600;font-size:.875rem;flex-shrink:0}.option-correct .option-letter{background-color:var(--color-success);color:#fff}.option-item .option-text{flex:1}.correct-badge{padding:.25rem .5rem;background-color:var(--color-success);color:#fff;border-radius:var(--radius-sm);font-size:.75rem;font-weight:600}.correct-answer{padding:var(--spacing-md);background-color:#28a7451a;border-left:4px solid var(--color-success);border-radius:var(--radius-md);color:var(--color-success);font-weight:600}.item-explanation{padding:var(--spacing-md);background-color:var(--bg-secondary);border-left:4px solid var(--color-info);border-radius:var(--radius-md);color:var(--text-secondary);line-height:1.6}.empty-glossary{padding:var(--spacing-xl)}.loading-screen{min-height:100vh;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:var(--spacing-lg)}.spinner{width:48px;height:48px;border:4px solid var(--bg-tertiary);border-top-color:var(--color-primary);border-radius:50%;animation:spin 1s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}.loading{text-align:center;padding:var(--spacing-xl);color:var(--text-secondary)}@media(max-width:768px){.dashboard-grid{grid-template-columns:1fr}.stats-grid{grid-template-columns:repeat(2,1fr)}.summary-stats,.results-stats{grid-template-columns:1fr}.header-content{flex-direction:column;align-items:flex-start}.user-info{width:100%}.header-actions{width:100%;justify-content:flex-start}.question-header{flex-direction:column}.question-type-badge{align-self:flex-start}}@media(max-width:768px){.dashboard-container,.quiz-container,.results-container,.stats-container,.glossary-container{padding:var(--spacing-lg)}.dashboard-grid{grid-template-columns:1fr}}@media(max-width:480px){body{font-size:14px}.dashboard-container,.quiz-container,.results-container,.stats-container,.glossary-container{padding:var(--spacing-md)}.user-greeting,.results-title{font-size:1.5rem}.results-score{font-size:2rem}.bank-stat,.stats-grid{grid-template-columns:1fr}}.continue-learning{margin:var(--spacing-xl) 0}.continue-learning h2{margin-bottom:var(--spacing-lg);color:var(--text-primary)}.courses-in-progress-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(300px,1fr));gap:var(--spacing-md)}.course-card-compact{display:flex;gap:var(--spacing-md);align-items:center;padding:var(--spacing-md)!important;transition:var(--transition-base)}.course-card-compact:hover{transform:translateY(-2px);box-shadow:var(--shadow-md)}.course-thumbnail-mini{width:60px;height:60px;border-radius:var(--radius-md);background-size:cover;background-position:center;flex-shrink:0}.course-compact-info{flex:1;min-width:0}.course-compact-title{margin:0 0 var(--spacing-xs) 0;font-size:.9375rem;font-weight:600;color:var(--text-primary);overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.course-compact-progress{display:flex;align-items:center;gap:var(--spacing-sm)}.progress-bar-mini{flex:1;height:6px;background:var(--bg-tertiary);border-radius:var(--radius-sm);overflow:hidden}.progress-fill-mini{height:100%;background:linear-gradient(90deg,var(--color-primary),var(--color-primary-light));transition:width var(--duration-slow) var(--ease-out)}.progress-text{font-size:.75rem;font-weight:600;color:var(--color-primary);white-space:nowrap}.dashboard-extra-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(350px,1fr));gap:var(--spacing-xl);margin:var(--spacing-xl) 0}.achievements-preview{display:flex;flex-direction:column;gap:var(--spacing-md)}.badges-preview-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:var(--spacing-md)}.no-achievements-message{text-align:center;padding:var(--spacing-xl);color:var(--text-tertiary)}.certificates-preview-list{display:flex;flex-direction:column;gap:var(--spacing-sm);margin-bottom:var(--spacing-md)}.cert-preview-item{display:flex;align-items:center;gap:var(--spacing-sm);padding:var(--spacing-sm);background:var(--bg-secondary);border-radius:var(--radius-md);transition:var(--transition-fast)}.cert-preview-item:hover{background:var(--bg-tertiary)}.cert-icon{color:var(--color-primary);flex-shrink:0}.cert-preview-info{flex:1;min-width:0}.cert-preview-title{font-size:.875rem;font-weight:500;color:var(--text-primary);overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.cert-preview-date{font-size:.75rem;color:var(--text-tertiary)}@media(max-width:768px){.courses-in-progress-grid,.dashboard-extra-grid,.badges-preview-grid{grid-template-columns:1fr}}.link-button{background:none;border:none;padding:0;color:var(--color-primary);font:inherit;font-weight:600;cursor:pointer;text-decoration:underline}.api-error-toast{position:fixed;bottom:1.5rem;right:1.5rem;z-index:2000;display:flex;align-items:center;gap:.75rem;max-width:min(420px,calc(100vw - 2rem));padding:.875rem 1rem;border-radius:8px;background:var(--color-danger);color:#fff;box-shadow:0 8px 24px #00000040}.api-error-toast button{background:none;border:none;color:inherit;font-size:1.25rem;line-height:1;cursor:pointer}.admin-users{padding:1.5rem;max-width:1000px}.admin-users table{width:100%;border-collapse:collapse;margin-top:1rem}.admin-users th,.admin-users td{text-align:left;padding:.75rem;border-bottom:1px solid var(--border-color, #e5e7eb)}.admin-users select{padding:.375rem .5rem;border-radius:6px;border:1px solid var(--border-color, #d1d5db);background:var(--bg-primary, #fff);color:inherit}.admin-users-table-wrap{overflow-x:auto}