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0}.sidebar-section{margin-bottom:2rem}.sidebar-title{font-size:.875rem;font-weight:600;color:var(--text-secondary);text-transform:uppercase;letter-spacing:.05em;padding:0 1.25rem;margin-bottom:.75rem}.sidebar-link{display:flex;align-items:center;padding:.625rem 1.25rem;color:var(--text-primary);text-decoration:none;font-weight:500;transition:background-color .2s}.sidebar-link:hover{background-color:var(--gray-100);color:var(--primary-color);text-decoration:none}.sidebar-link.active{background-color:var(--primary-light);color:var(--primary-color);font-weight:600}.sidebar-icon{margin-right:.875rem;font-size:1.25rem;display:flex;align-items:center;justify-content:center;width:24px;text-align:center}.sidebar.closed .sidebar-text{display:none}.sidebar-truncate{white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.sidebar-footer{margin-top:auto;padding:1rem 1.25rem;border-top:1px solid 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#4caf50}.error-dismiss{background:none;border:none;color:inherit;font-size:1.25rem;cursor:pointer;padding:0;display:flex;align-items:center;justify-content:center;margin-left:1rem;opacity:.7}.error-dismiss:hover{opacity:1}.not-found-container{display:flex;flex-direction:column;align-items:center;justify-content:center;padding:4rem 1rem;text-align:center;height:100%;min-height:50vh}.not-found-code{font-size:8rem;font-weight:700;color:var(--primary-color);line-height:1;margin-bottom:1rem;opacity:.7}.not-found-title{font-size:2rem;margin-bottom:1rem;color:var(--text-primary)}.not-found-message{color:var(--text-secondary);margin-bottom:2rem;max-width:500px}.concluded-courses{margin-top:1rem;padding-top:.75rem;border-top:1px solid var(--border-color);opacity:.85}.sidebar-course-count{margin-left:.5rem;font-size:.75rem;background-color:var(--gray-300);color:var(--text-secondary);padding:.125rem 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0}.error-actions button{padding:.75rem 1.5rem;border:none;border-radius:6px;font-weight:600;cursor:pointer;transition:all .2s ease}.error-actions .primary-button{background:#007bff;color:#fff}.error-actions .primary-button:hover{background:#0056b3;transform:translateY(-1px)}.error-actions .secondary-button{background:#6c757d;color:#fff}.error-actions .secondary-button:hover{background:#545b62;transform:translateY(-1px)}.error-id{font-size:.875rem;color:#6c757d;font-family:monospace;margin-top:1rem}.error-recovery{display:flex;justify-content:center;align-items:center;min-height:300px;padding:2rem;background:#f8f9fa;border-radius:8px;margin:1rem 0}.error-recovery--boundary{min-height:100vh;margin:0;border-radius:0;background:linear-gradient(135deg,#667eea,#764ba2);color:#fff}.error-recovery__content{max-width:500px;text-align:center}.error-recovery__icon{font-size:4rem;margin-bottom:1.5rem;animation:bounce 2s infinite}@keyframes 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768px){.header-container{padding:0 1rem}.logo a{font-size:1.25rem}.current-page-indicator{padding:.375rem .75rem}.user-dropdown{position:fixed!important;top:60px!important;right:1rem;left:auto;width:auto;max-width:calc(100vw - 2rem);z-index:9999!important;box-shadow:0 8px 32px #00000040;background:#fff!important}}.hamburger-button{display:flex;background:transparent;border:none;cursor:pointer;padding:.5rem;position:relative;width:44px;height:44px;align-items:center;justify-content:center;border-radius:8px;transition:all .2s ease}.hamburger-button:hover{transform:scale(1.05)}.hamburger-button:focus-visible{outline:2px solid 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1rem;border-radius:var(--border-radius);font-weight:var(--font-weight-medium)}.snapshots-management{margin-top:2rem;padding:1.5rem;background-color:#fff;border-radius:var(--border-radius);box-shadow:var(--shadow)}.snapshots-actions{display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:1rem}.text-link{color:var(--primary-color);text-decoration:none;font-weight:var(--font-weight-medium)}.text-link:hover{text-decoration:underline}.secondary-button{background-color:#fff;color:var(--primary-color);border:1px solid var(--primary-color);padding:.5rem 1rem;border-radius:var(--border-radius);cursor:pointer;transition:all .2s}.secondary-button:hover{background-color:var(--primary-light)}.trend-chart-loading{height:350px;display:flex;align-items:center;justify-content:center}@media (max-width: 768px){.analytics-grid{grid-template-columns:1fr}.trend-controls{flex-direction:column;align-items:flex-start}.summary-stats{grid-template-columns:1fr}}@media (max-width: 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ease}.heatmap-cell:hover{transform:scale(1.1)}.heatmap-legends{display:flex;justify-content:center;margin-top:1rem;gap:1rem}.heatmap-legend-item{display:flex;align-items:center;font-size:.75rem}.heatmap-legend-color{width:12px;height:12px;margin-right:4px;border-radius:2px}.heatmap-grid{display:flex;flex-direction:column;gap:3px}.heatmap-row{display:flex;align-items:center;height:30px}.day-label{width:40px;text-align:right;padding-right:10px;font-size:.75rem;color:var(--text-secondary);font-weight:500}.day-cells{display:flex;gap:3px;flex:1}.heatmap-cell{flex:1;height:30px;border-radius:3px;transition:transform .15s ease,opacity .15s ease}.heatmap-cell:hover{transform:scale(1.1);opacity:.9}.submission-heatmap{display:none}.heatmap-legends{display:flex;justify-content:center;margin-top:1.5rem;gap:1rem;flex-wrap:wrap}.week-labels{display:flex;margin-bottom:6px}.day-label-spacer{width:40px;flex-shrink:0}.week-label-container{display:flex;flex:1;gap:3px}.week-label{flex:1;font-size:.7rem;color:var(--text-secondary);text-align:center;overflow:hidden;white-space:nowrap}.heatmap-container{margin:1.5rem 0;display:flex;flex-direction:column}@media (max-width: 600px){.week-label:nth-child(odd){display:none}}@media (max-width: 400px){.week-label{display:none}.week-label:first-child,.week-label:nth-child(6),.week-label:last-child{display:block}}