:root {
            --primary: #4361ee;
            --primary-light: #ebf0ff;
            --secondary: #3f37c9;
            --success: #4cc9f0;
            --danger: #f72585;
            --warning: #f8961e;
            --info: #4895ef;
            --dark: #212529;
            --light: #f8f9fa;
            --gray: #6c757d;
            --gray-light: #e9ecef;
            --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
            --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
            --shadow: 0 1px 3px 0 rgba(0, 0, 0, 0.1), 0 1px 2px 0 rgba(0, 0, 0, 0.06);
            --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
            --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
            --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
            --rounded: 0.375rem;
            --rounded-lg: 0.5rem;
            --rounded-xl: 0.75rem;
        }

        body {
            font-family: var(--font-sans);
            background-color: #f5f7fb;
            color: var(--dark);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        .dashboard-header {
            background: linear-gradient(135deg, #4361ee 0%, #3f37c9 100%);
            color: white;
            padding: 1.5rem 0;
            box-shadow: var(--shadow-md);
            margin-bottom: 2rem;
        }

        .dashboard-title {
            font-weight: 700;
            font-size: 1.75rem;
            display: flex;
            align-items: center;
            gap: 0.75rem;
        }

        .dashboard-title i {
            font-size: 1.5rem;
        }

        .card {
            border: none;
            border-radius: var(--rounded-lg);
            box-shadow: var(--shadow-sm);
            transition: all 0.2s ease;
            background-color: white;
            margin-bottom: 1.5rem;
        }

        .card:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-2px);
        }

        .card-header {
            background-color: white;
            border-bottom: 1px solid rgba(0, 0, 0, 0.05);
            padding: 1.25rem 1.5rem;
            border-radius: var(--rounded-lg) var(--rounded-lg) 0 0 !important;
        }

        .card-header h5 {
            font-weight: 600;
            margin: 0;
            display: flex;
            align-items: center;
            gap: 0.75rem;
            color: var(--dark);
        }

        .card-header h5 i {
            color: var(--primary);
        }

        .card-body {
            padding: 1.5rem;
        }

        .badge-indicator {
            padding: 0.5rem 0.75rem;
            border-radius: var(--rounded);
            font-weight: 500;
            font-size: 0.8125rem;
            display: inline-flex;
            align-items: center;
            gap: 0.375rem;
        }

        .badge-buy {
            background-color: rgba(67, 97, 238, 0.1);
            color: var(--primary);
        }

        .badge-sell {
            background-color: rgba(247, 37, 133, 0.1);
            color: var(--danger);
        }

        .badge-oi {
            background-color: rgba(76, 201, 240, 0.1);
            color: var(--success);
        }

        .form-control, .form-select {
            border-radius: var(--rounded);
            border: 1px solid #e2e8f0;
            padding: 0.5rem 0.75rem;
            font-size: 0.875rem;
            transition: all 0.2s ease;
        }

        .form-control:focus, .form-select:focus {
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(67, 97, 238, 0.2);
        }

        .btn {
            border-radius: var(--rounded);
            font-weight: 500;
            padding: 0.5rem 1.25rem;
            font-size: 0.875rem;
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            transition: all 0.2s ease;
        }

        .btn-primary {
            background-color: var(--primary);
            border-color: var(--primary);
        }

        .btn-primary:hover {
            background-color: #3a56d4;
            border-color: #3a56d4;
            transform: translateY(-1px);
        }

        .loading-spinner {
            display: flex;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            padding: 3rem;
            background-color: white;
            border-radius: var(--rounded-lg);
            box-shadow: var(--shadow-sm);
        }

        .spinner {
            width: 3rem;
            height: 3rem;
            border: 3px solid rgba(67, 97, 238, 0.1);
            border-top-color: var(--primary);
            border-radius: 50%;
            animation: spin 1s linear infinite;
        }

        @keyframes spin {
            to { transform: rotate(360deg); }
        }

        .loading-spinner p {
            margin-top: 1rem;
            color: var(--gray);
            font-weight: 500;
        }

        .table {
            font-size: 0.875rem;
            color: var(--dark);
        }

        .table th {
            font-weight: 600;
            text-transform: uppercase;
            font-size: 0.75rem;
            letter-spacing: 0.05em;
            color: var(--gray);
            border-bottom-width: 1px;
        }

        .table td {
            vertical-align: middle;
            padding: 1rem;
            border-color: rgba(0, 0, 0, 0.03);
        }

        .text-buy {
            color: var(--primary);
        }

        .text-sell {
            color: var(--danger);
        }

        .text-oi {
            color: var(--success);
        }

        .chart-container {
            position: relative;
            height: 300px;
            width: 100%;
        }

        /* Custom scrollbar */
        ::-webkit-scrollbar {
            width: 8px;
            height: 8px;
        }

        ::-webkit-scrollbar-track {
            background: #f1f1f1;
            border-radius: 10px;
        }

        ::-webkit-scrollbar-thumb {
            background: #c1c1c1;
            border-radius: 10px;
        }

        ::-webkit-scrollbar-thumb:hover {
            background: #a8a8a8;
        }

        /* Custom select2 styling */
        .select2-container--default .select2-selection--single {
            height: auto;
            padding: 0.5rem 0.75rem;
            border: 1px solid #e2e8f0;
            border-radius: var(--rounded);
        }

        .select2-container--default .select2-selection--single .select2-selection__arrow {
            height: 100%;
        }

        /* Flatpickr customization */
        .flatpickr-input {
            background-color: white !important;
        }

        /* Responsive adjustments */
        @media (max-width: 768px) {
            .dashboard-title {
                font-size: 1.5rem;
            }
            
            .card-header h5 {
                font-size: 1.1rem;
            }
            
            .card-body {
                padding: 1rem;
            }
        }

        /* DataTables customization */
        .dataTables_wrapper .dataTables_filter input {
            border: 1px solid #e2e8f0;
            border-radius: var(--rounded);
            padding: 0.25rem 0.5rem;
        }

        .dataTables_wrapper .dataTables_length select {
            border: 1px solid #e2e8f0;
            border-radius: var(--rounded);
            padding: 0.25rem 0.5rem;
        }

        .dataTables_wrapper .dataTables_paginate .paginate_button {
            border-radius: var(--rounded) !important;
            padding: 0.25rem 0.75rem !important;
            margin: 0 0.125rem !important;
            border: 1px solid transparent !important;
        }

        .dataTables_wrapper .dataTables_paginate .paginate_button.current {
            background: var(--primary) !important;
            color: white !important;
            border: 1px solid var(--primary) !important;
        }

        /* Notification system */
        .notification {
            position: fixed;
            bottom: 1.5rem;
            right: 1.5rem;
            background: white;
            border-radius: var(--rounded-lg);
            box-shadow: var(--shadow-lg);
            padding: 1rem 1.25rem;
            display: flex;
            align-items: center;
            gap: 1rem;
            z-index: 9999;
            max-width: 350px;
            transform: translateY(20px);
            opacity: 0;
            transition: all 0.3s ease;
        }

        .notification.show {
            transform: translateY(0);
            opacity: 1;
        }

        .notification.notification-success {
            border-left: 4px solid var(--success);
        }

        .notification.notification-error {
            border-left: 4px solid var(--danger);
        }

        .notification-icon {
            font-size: 1.25rem;
            flex-shrink: 0;
        }

        .notification-success .notification-icon {
            color: var(--success);
        }

        .notification-error .notification-icon {
            color: var(--danger);
        }

        .notification-close {
            margin-left: auto;
            cursor: pointer;
            opacity: 0.7;
            transition: opacity 0.2s ease;
        }

        .notification-close:hover {
            opacity: 1;
        }

        /* Tab styling */
        .nav-tabs {
            border-bottom: 1px solid rgba(0, 0, 0, 0.05);
            margin-bottom: 1.5rem;
        }

        .nav-tabs .nav-link {
            border: none;
            color: var(--gray);
            font-weight: 500;
            padding: 0.75rem 1.25rem;
            border-radius: var(--rounded) var(--rounded) 0 0;
            display: flex;
            align-items: center;
            gap: 0.5rem;
            transition: all 0.2s ease;
        }

        .nav-tabs .nav-link:hover {
            color: var(--primary);
            background-color: rgba(67, 97, 238, 0.05);
        }

        .nav-tabs .nav-link.active {
            color: var(--primary);
            background-color: white;
            border-bottom: 2px solid var(--primary);
        }

        .tab-content {
            background-color: white;
            border-radius: 0 var(--rounded-lg) var(--rounded-lg) var(--rounded-lg);
            box-shadow: var(--shadow-sm);
            padding: 1.5rem;
        }

        .tab-pane {
            animation: fadeIn 0.3s ease;
        }

        @keyframes fadeIn {
            from { opacity: 0; }
            to { opacity: 1; }
        }