.analytics-section {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(min(100%, 450px), 1fr));
    gap: 1.5rem;
  }
  
  .chart-card,
  .stats-summary-card {
    background-color: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    box-shadow: var(--shadow);
    padding: 0.75rem;
    display: flex;
    flex-direction: column;
    position: relative;
    overflow: hidden !important;
    transition: transform 0.2s, box-shadow 0.2s;
  }
  
  .chart-card:hover,
  .stats-summary-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.2);
  }
  
  .chart-card h2,
  .stats-summary-card h2 {
    margin: 0 0 0.5rem 0;
    font-size: 1.2rem;
    font-weight: 600;
    color: var(--accent-color);
    padding-left: 8px;
    border-left: 3px solid var(--accent-color);
  }
  
  .chart-card:not(.wide-card) {
    height: 300px;
    max-height: 300px;
  }
  
  .chart-card.activity-trend-card {
    height: auto !important;
    min-height: 380px !important;
    max-height: 400px !important;
    padding-bottom: 1rem !important;
  }
  
  .chart-card.activity-trend-card .chart-content {
    height: auto !important;
    min-height: 330px !important;
    max-height: 330px !important;
    padding-bottom: 0 !important;
    overflow: visible !important;
  }
  
  .stats-summary-card {
    height: 350px;
    min-height: 350px;
  }
  
  .chart-content {
    height: 300px;
    max-height: 350px;
    flex: 1;
    position: relative;
    overflow: hidden !important;
    margin-top: 0.5rem;
  }
  
  .chart-content canvas {
    width: 100% !important;
    height: 100% !important;
    max-width: 100% !important;
    max-height: 100% !important;
    background-color: var(--card-bg) !important;
  }
  
  .activity-trend-card .chart-content canvas {
    width: 100% !important;
    height: 100% !important;
    max-width: 100% !important;
    max-height: 100% !important;
  }
  
  .wide-card {
    height: auto !important;
    min-height: 375px !important;
    max-height: none !important;
    grid-column: 1 / -1;
  }
  
  .wide-card .chart-content {
    height: auto !important;
    min-height: 375px !important;
    max-height: none !important;
    flex-grow: 1;
    padding-bottom: 1rem !important;
  }
  
  .chart-card.heatmap-card {
    height: auto !important;
    min-height: 350px !important;
    max-height: 400px !important;
  }
  
  .chart-card.heatmap-card .chart-content {
    height: auto !important;
    min-height: 280px !important;
    max-height: 360px !important;
    padding: 0 !important;
    overflow: visible !important;
  }
  
  #timeOfDayHeatmap-container {
    margin: 0 !important;
    padding: 0 !important;
  }
  
  #timeOfDayHeatmap-legend {
    padding: 1rem 0.5rem !important;
    margin: 0.5rem 0 1rem 0 !important;
    height: auto !important;
    min-height: 40px !important;
    display: block !important;
    position: relative !important;
    clear: both !important;
  }
  
  #timeOfDayHeatmap-legend span {
    display: block !important;
    text-align: center !important;
    font-weight: bold !important;
    font-size: 12px !important;
    margin-bottom: 8px !important;
    color: var(--text-color) !important;
  }
  
  #timeOfDayHeatmap-legend-gradient-container {
    margin-bottom: 20px !important;
    position: relative !important;
    height: 30px !important;
    width: 150px !important;
    margin: 0 auto 20px auto !important;
  }
  
  #timeOfDayHeatmap-legend-gradient-container span {
    position: absolute !important;
    font-size: 12px !important;
    display: block !important;
    opacity: 1 !important;
    color: var(--text-color) !important;
    font-weight: bold !important;
    text-shadow: 0px 0px 3px var(--card-bg) !important;
  }
  
  #timeOfDayHeatmap-grid {
    min-width: 700px !important;
    margin: 5px 0 !important;
  }
  
  .loading-chart {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: rgba(var(--card-bg-rgb), 0.8);
    z-index: 2;
    font-size: 0.9rem;
    color: var(--text-color);
  }
  
  .loading-chart::after {
    content: '';
    width: 1.25rem;
    height: 1.25rem;
    border: 2px solid var(--accent-color);
    border-top: 2px solid transparent;
    border-radius: 50%;
    margin-left: 0.5rem;
    animation: spin 1s linear infinite;
  }
  
  @keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
  }
  
  .weekly-stats-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.5rem;
    padding: 1rem 0.5rem;
    width: 100%;
    margin-bottom: 0.5rem;
  }
  
  .weekly-stat-item {
    background-color: rgba(var(--card-bg-rgb), 0.3);
    border-radius: 8px;
    padding: 1rem;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    transition: transform 0.2s, background-color 0.2s;
    border: 1px solid var(--border-color);
  }
  
  .weekly-stat-item:hover {
    transform: translateY(-5px);
    background-color: rgba(var(--card-bg-rgb), 0.5);
    border-color: var(--accent-color);
  }
  
  .stat-value {
    font-size: 1.2rem;
    font-weight: 600;
    color: var(--accent-color);
  }
  
  .stat-label {
    font-size: 0.9rem;
    color: var(--text-color);
    font-weight: 500;
  }
  
  .weekly-stat-item .stat-value {
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
  }
  
  #chartControls {
    margin-top: 1rem;
    padding: 0.75rem;
    background-color: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 8px;
  }
  
  .filter-controls {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    align-items: center;
  }
  
  .date-range-control {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 0.5rem;
    color: var(--text-color);
  }
  
  .date-input {
    padding: 0.4rem 0.6rem;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    background-color: var(--card-bg);
    color: var(--text-color);
    font-size: 0.9rem;
    width: 140px;
  }
  
  .control-btn {
    padding: 0.4rem 0.75rem;
    border: none;
    border-radius: 4px;
    background-color: var(--primary-color);
    color: #fff;
    font-weight: 600;
    cursor: pointer;
    transition: background-color 0.3s;
  }
  
  .control-btn:hover {
    background-color: var(--accent-color);
  }
  
  .fish-leaderboard-table {
    width: 100%;
  }
  
  .fish-leaderboard-header {
    display: grid;
    grid-template-columns: 2fr 1fr 2fr;
    font-weight: 600;
    padding: 0.5rem;
    border-bottom: 2px solid var(--border-color);
  }
  
  .fish-leaderboard-row {
    display: grid;
    grid-template-columns: 2fr 1fr 2fr;
    padding: 0.5rem;
    border-bottom: 1px solid var(--border-color);
    align-items: center;
  }
  
  .fish-leaderboard-row:nth-child(even) {
    background-color: rgba(var(--card-bg-rgb), 0.3);
  }
  
  .fish-percent {
    position: relative;
    height: 1.5rem;
    display: flex;
    align-items: center;
  }
  
  .fish-percent-bar {
    position: absolute;
    top: 0;
    left: 0;
    height: 100%;
    background-color: rgba(var(--primary-color-rgb), 0.2);
    border-radius: 3px;
    z-index: 0;
  }
  
  .fish-percent span {
    position: relative;
    z-index: 1;
    padding-left: 0.5rem;
  }
  
  .retention-table {
    width: 100%;
    border-collapse: separate;
    border-spacing: 2px;
    margin-top: 0.5rem;
  }
  
  .retention-table th {
    padding: 0.5rem;
    font-weight: 600;
    background-color: var(--card-bg);
    border: 1px solid var(--border-color);
    text-align: center;
  }
  
  .retention-table td {
    padding: 0.5rem;
    text-align: center;
    font-weight: 500;
    transition: transform 0.2s;
  }
  
  .retention-table td:hover {
    transform: scale(1.05);
  }
  
  .cohort-label {
    font-weight: 600;
    background-color: var(--card-bg);
    border: 1px solid var(--border-color);
  }
  
  .users-count {
    background-color: var(--card-bg);
    border: 1px solid var(--border-color);
  }
  
  .session-length-stats {
    flex: 0 0 auto;
    margin-top: 0.5rem;
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 0.75rem;
    max-height: 100px;
    overflow-y: auto;
  }
  
  .session-stat-row {
    background-color: rgba(var(--card-bg-rgb), 0.3);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    padding: 0.5rem;
    display: flex;
    flex-direction: column;
    align-items: center;
  }
  
  .session-stat-row .stat-label {
    margin-bottom: 0.25rem;
  }
  
  .engagement-stats {
    margin-top: 1.5rem;
  }
  
  .profile-engagement-score {
    font-size: 1.4rem;
    color: var(--primary-color);
  }
  
  .engagement-meter-container {
    margin-top: 1rem;
    width: 100%;
  }
  
  .engagement-meter {
    height: 1rem;
    width: 100%;
    background-color: rgba(var(--card-bg-rgb), 0.3);
    border-radius: 8px;
    overflow: hidden;
    border: 1px solid var(--border-color);
  }
  
  .engagement-meter-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--primary-color), var(--accent-color));
    transition: width 0.5s ease-in-out;
  }
  
  .engagement-meter-labels {
    display: flex;
    justify-content: space-between;
    margin-top: 0.25rem;
    font-size: 0.8rem;
    color: var(--text-color);
  }
  
  @media (max-width: 991px) {
    .analytics-section {
      grid-template-columns: 1fr;
    }
    
    .weekly-stats-grid {
      grid-template-columns: repeat(2, 1fr);
      gap: 1rem;
    }
    
    .achievement-grid {
      grid-template-columns: repeat(2, 1fr);
    }
    
    .wide-card .chart-content {
      min-height: 375px !important;
    }
  }
  
  @media (max-width: 768px) {
    .chart-card,
    .stats-summary-card {
      height: auto;
      min-height: 350px;
    }
    
    .chart-content {
      height: 280px;
      min-height: 280px;
    }
    
    .date-range-control {
      flex-direction: column;
      align-items: flex-start;
      width: 100%;
    }
    
    .date-input {
      width: 100%;
    }
    
    .control-btn {
      width: 100%;
      margin-top: 0.5rem;
    }
    
    .achievement-grid {
      grid-template-columns: 1fr;
    }
    
    .session-length-stats {
      grid-template-columns: repeat(2, 1fr);
    }
    
    .retention-table {
      font-size: 0.9rem;
    }
    
    .chart-card.activity-trend-card {
      min-height: 380px !important;
      padding-bottom: 3rem !important;
    }
  
    .chart-card.activity-trend-card .chart-content {
      height: auto !important;
      min-height: 350px !important;
      max-height: none !important;
      padding-bottom: 2rem !important;
      overflow: visible !important;
    }
  
    .chart-card.heatmap-card {
      min-height: auto !important;
      max-height: none !important;
      padding-bottom: 1rem !important;
      margin-bottom: 1rem !important;
    }
    
    
    .chart-card.heatmap-card .chart-content {
      min-height: auto !important;
      max-height: none !important;
    }
  
    #timeOfDayHeatmap-legend {
      position: relative !important;
      bottom: 0 !important;
      padding: 1rem 0.5rem !important;
      margin-top: 1rem !important;
      min-height: 50px !important;
    }
    canvas#activityTrendChart {
      margin-bottom: 1.5rem !important;
    }
  }

  @media (max-width: 576px) {
    .weekly-stats-grid {
      grid-template-columns: 1fr;
      gap: 0.75rem;
      padding: 0.5rem;
    }
    
    .weekly-stat-item {
      padding: 0.75rem;
    }
    
    .weekly-stat-item .stat-value {
      font-size: 1.5rem;
      margin-bottom: 0.25rem;
    }
    
    .stat-label {
      font-size: 0.8rem;
    }
    
    .chart-content {
      min-height: 250px;
      height: 250px;
    }
    
    .fish-leaderboard-row,
    .fish-leaderboard-header {
      grid-template-columns: 2fr 1fr 1fr;
      font-size: 0.9rem;
    }
    
    .session-length-stats {
      grid-template-columns: 1fr;
    }
    
    .retention-table th, 
    .retention-table td {
      padding: 0.3rem;
      font-size: 0.8rem;
    }
    
    .chart-card.activity-trend-card, 
    .chart-card.heatmap-card {
      min-height: 300px !important;
    }
  
    .chart-card.activity-trend-card .chart-content {
      padding-bottom: 3rem !important;
      min-height: 350px !important;
    }
    
    .chart-card.heatmap-card .chart-content {
      min-height: 300px !important;
    }
  
    #timeOfDayHeatmap-legend {
      padding: 1.5rem 0.5rem !important;
      min-height: 100px !important;
      margin-top: 1.5rem !important;
    }
  
    #timeOfDayHeatmap-legend span {
      font-size: 14px !important;
      margin-bottom: 1rem !important;
    }
  }