/* Custom Styles */
        body {
            background-color: #f8f9fa;
            background-image: url("../img/Nature2.png");
            background-attachment: fixed;
        }
        .chart-container {
            position: relative;
            margin: auto;
            height: 60vh; /* You can adjust this or remove it if not needed */
            width: 100%;
        }
        .aggregation-selector {
            max-width: 200px;
        }
        .card-header {
            display: flex;
            align-items: center;
            justify-content: space-between;
            background-color: #343a40;
            color: #fff;
        }
        .card-header .card-title {
            margin: 0;
            font-size: 1.25rem;
        }
        .spinner-overlay {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: rgba(255,255,255,0.7);
            display: flex;
            align-items: center;
            justify-content: center;
            z-index: 9999;
            display: none; /* Hidden by default */
        }

        /* Improved Card Styles */
        .card {
            border: none;
            border-radius: 10px;
            overflow: hidden;
        }
        .card-header {
            background-color: #495057;
        }
        .card-body {
            background-color: #ffffff;
            position: relative;
            height: 300px; /* Reduced height for charts */
            /* height: 300px; */ /* Adjusted from 400px to 300px */
        }
        .card-title {
            display: flex;
            align-items: center;
        }
        .card-title i {
            margin-right: 8px;
        }

        /* Transition for Layout Changes */
        .chart-col {
            transition: all 0.5s ease;
        }

        /* Button Enhancements */
        .btn-group .btn {
            border-radius: 5px;
            transition: background-color 0.3s, color 0.3s;
        }
        .btn-group .btn.active {
            background-color: #0d6efd;
            color: #fff;
        }
        .btn-group .btn:hover {
            background-color: #0d6efd;
            color: #fff;
        }

        /* Adjust Chart Titles for Better Readability */
        .chart-container canvas {
            /* Ensure charts are responsive */
            max-width: 100%;
            height: auto;
        }
        .dashboard-btn,
        .logout-btn {
          top: 20px;
          /* Common button styling */
          color: #fff;
          border: none;
          border-radius: 4px;
          padding: 10px 20px;
          font-size: 16px;
          cursor: pointer;
          transition: background-color 0.3s ease, transform 0.2s ease;
          box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
          margin-right: 1rem;
        }
        
        /* Positioning: Dashboard button is left of the logout button */
        .dashboard-btn {
          right: 150px; /* Adjust for spacing */
          background-color: #2196F3; /* Blue */
        }
        
        .dashboard-btn:hover {
          background-color: #1976D2; 
          transform: translateY(-1px);
        }
        
        .dashboard-btn:active {
          background-color: #1565C0;
          transform: translateY(1px);
        }
        
        /* Logout button to the far right */
        .logout-btn {
          right: 20px;
          background-color: #f44336; /* Red */
        }
        
        .logout-btn:hover {
          background-color: #d32f2f;
          transform: translateY(-1px);
        }
        
        .logout-btn:active {
          background-color: #b71c1c;
          transform: translateY(1px);
        }