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var(--space-md);font-size:.875rem}.btn-primary{background:var(--primary-blue);color:#fff}.btn-primary:hover:not(:disabled){background:var(--primary-hover)}.btn-secondary{background:#6c757d;color:#fff}.btn-secondary:hover:not(:disabled){background:#5a6268}.btn-danger{background:var(--error);color:#fff}.btn-danger:hover:not(:disabled){background:#c82333}.btn:disabled{background:#ccc;cursor:not-allowed;opacity:.7}.card{background:var(--bg-card);border:1px solid var(--border-light);border-radius:var(--radius-lg);padding:var(--space-md);box-shadow:var(--shadow-sm);transition:background-color var(--transition-fast),box-shadow var(--transition-fast)}.card:hover{background-color:var(--bg-hover);box-shadow:var(--shadow-md)}.dark-mode 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var(--transition-fast);color:var(--text-secondary);font-size:1.5rem}.mobile-menu-toggle:hover{background:var(--bg-light);color:var(--text-primary)}.mobile-nav-menu{display:none;width:100%;background:var(--bg-card);padding:var(--space-md);border-top:1px solid var(--border-light);box-shadow:var(--shadow-sm)}.mobile-nav-menu.mobile-only{display:block}.mobile-nav-links{display:flex;flex-direction:column;gap:var(--space-sm);margin-bottom:var(--space-md)}.mobile-nav-link{color:var(--text-secondary);text-decoration:none;padding:var(--space-sm) var(--space-md);border-radius:var(--radius-sm);font-size:1rem;font-weight:500;transition:all var(--transition-fast);display:block}.mobile-nav-link:hover{color:var(--text-primary);background:var(--bg-light)}.mobile-nav-link.active{background:var(--primary-blue);color:#fff}.mobile-search{margin-bottom:var(--space-md);width:100%}.mobile-search .search-input{width:100%}.create-deck-btn{width:100%;justify-content:center}.desktop-only{display:none!important}.mobile-only{display:block!important}.profile-name{display:none}}.desktop-only{display:block}.mobile-only{display:none}@media (min-width: calc(var(--breakpoint-mobile) + 1px)) and (max-width: var(--breakpoint-tablet)){.stats-grid{grid-template-columns:repeat(2,1fr)}.quiz-container,.quiz-results{max-width:90%}}@media (min-width: var(--breakpoint-desktop)){.container{padding:var(--space-xxl)}.quiz-container,.quiz-results{max-width:50%}.stats-grid{grid-template-columns:repeat(3,1fr)}}@media print{.navbar,.profile-container,.quiz-actions,.deck-actions,.no-decks button,.no-classrooms button{display:none!important}body{background:#fff!important;color:#000!important}.card,.deck-card,.classroom-card,.quiz-container,.quiz-results{box-shadow:none!important;border:1px solid #ccc!important;page-break-inside:avoid}@page{size:auto;margin:1cm}}.dashboard-section{margin-bottom:2rem}.stats-overview{grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:1rem}.stat-card{padding:1.25rem 1rem;text-align:center;border-radius:8px;transition:all .2s ease;border:1px solid var(--border-light)}.stat-card:hover{background-color:var(--bg-hover);box-shadow:0 4px 12px #0000001a!important}.stat-icon{font-size:1.75rem;margin-bottom:.5rem}.stat-value{font-size:1.75rem;font-weight:600;margin-bottom:.25rem;line-height:1.2}.stat-label{font-size:.875rem;color:var(--text-secondary);margin-bottom:.25rem;font-weight:500}.stat-subtext{font-size:.75rem;color:var(--text-secondary);opacity:.8}.charts-row{grid-template-columns:repeat(auto-fit,minmax(300px,1fr));gap:1rem}.chart-card{padding:1.25rem;border-radius:8px;border:1px solid var(--border-light)}.chart-title{font-size:1.125rem;font-weight:500;margin-bottom:.5rem}.charts-section{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:var(--space-lg)}@media (max-width: 1024px){.charts-section{grid-template-columns:1fr}}.chart-container{min-height:250px;max-height:250px;width:100%;position:relative;overflow:hidden}.chart-wrapper{position:relative;height:250px;width:100%}.recent-activity{margin-top:1.5rem}.activity-list{display:grid;gap:.5rem}.activity-item:hover{box-shadow:0 2px 8px #0000001a;background-color:var(--bg-hover)}.activity-info{display:flex;justify-content:space-between;align-items:center;gap:1rem}.activity-deck{font-weight:500;margin-bottom:.25rem}.activity-time,.activity-count{font-size:.875rem;color:#65676b}.quick-actions{margin-top:1.5rem}.actions-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:1rem}.action-button{padding:1.5rem 1rem;text-align:center;border-radius:8px;transition:all .2s ease;border:1px solid #e4e6eb;background:#fff;cursor:pointer}.action-button:hover{box-shadow:0 4px 12px #0000001a;background-color:var(--bg-hover)}.action-button:disabled{opacity:.5;cursor:not-allowed}.action-button:focus{outline:none;ring:2px solid #1877f2}.action-icon{font-size:1.5rem;margin-bottom:.5rem}.action-text{font-weight:500}.no-activity{padding:1.5rem;font-size:.875rem;color:#65676b}@media (max-width: 768px){.stats-overview{grid-template-columns:repeat(2,1fr)}.charts-row,.actions-grid{grid-template-columns:1fr}}@media (max-width: 480px){.stats-overview{grid-template-columns:1fr}}.dark-mode h1,.dark-mode h2,.dark-mode h3,.dark-mode h4,.dark-mode h5,.dark-mode h6{color:#fff!important}.dark-mode .navbar{background-color:#1a1a1a!important}.save-button,.btn-primary,.simple-btn-primary{color:#fff!important;background-color:var(--primary-blue)!important}.brand-icon,.nav-item.active a{color:var(--primary-blue)!important;background-color:transparent!important}.nav-item.active{background-color:var(--nav-hover)!important}.page-title{color:var(--primary-blue)!important}