:root {
            --primary-color: #6366f1;
            --secondary-color: #8b5cf6;
            --accent-color: #f59e0b;
            --success-color: #10b981;
            --danger-color: #ef4444;
            --warning-color: #f59e0b;
            --info-color: #3b82f6;
            --dark-color: #1e293b;
            --light-color: #f8fafc;
            --sidebar-bg: #0f172a;
            --sidebar-hover: #1e293b;
            --card-shadow: 0 1px 3px 0 rgba(0, 0, 0, 0.1), 0 1px 2px 0 rgba(0, 0, 0, 0.06);
            --card-shadow-hover: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
            --border-radius: 12px;
            --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        }

        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }

        body {
            font-family: "Noto Sans Thai", sans-serif;
            font-weight: 400;
            background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
            min-height: 100vh;
            color: var(--dark-color);
            line-height: 1.6;
        }

        /* Modern Sidebar */
        .sidebar {
            position: fixed;
            top: 0;
            left: 0;
            width: 280px;
            height: 100vh;
            background: var(--sidebar-bg);
            color: #fff;
            overflow-y: auto;
            padding: 2rem 1rem;
            box-shadow: 4px 0 6px rgba(0, 0, 0, 0.1);
            z-index: 1000;
            transition: var(--transition);
        }

        .sidebar h4 {
            font-size: 1.75rem;
            font-weight: 700;
            text-align: center;
            margin-bottom: 2rem;
            color: var(--primary-color);
            text-transform: uppercase;
            letter-spacing: 2px;
        }

        .sidebar hr {
            border-color: rgba(255, 255, 255, 0.1);
            margin: 1rem 0;
        }

        .sidebar .nav-link {
            color: rgba(255, 255, 255, 0.8);
            padding: 0.75rem 1.25rem;
            margin: 0.25rem 0;
            border-radius: var(--border-radius);
            transition: var(--transition);
            font-weight: 500;
            display: flex;
            align-items: center;
            gap: 0.75rem;
        }

        .sidebar .nav-link:hover {
            background: var(--sidebar-hover);
            color: #fff;
            transform: translateX(5px);
        }

        .sidebar .nav-link.active {
            background: rgba(99, 102, 241, 0.25);
            color: #fff;
        }

        .sidebar-submenu {
            margin-left: 0.75rem;
        }

        .sidebar-submenu .nav-link {
            padding-left: 2rem;
            font-size: 0.94rem;
        }

        .sidebar .nav-link[aria-expanded="true"] .submenu-arrow {
            transform: rotate(90deg);
        }

        .sidebar .nav-link.text-danger {
            color: #fca5a5;
        }

        .sidebar .nav-link.text-danger:hover {
            background: rgba(239, 68, 68, 0.2);
            color: #fecaca;
        }

        .sidebar-logout-form {
            margin: 0;
        }

        .sidebar-logout-button {
            width: 100%;
            background: transparent;
            border: 0;
            text-align: left;
        }

        /* Main Content */
        .content {
            margin-left: 280px;
            padding: 2rem;
            min-height: 100vh;
            transition: var(--transition);
        }

        /* Modern Cards */
        .card {
            border: none;
            border-radius: var(--border-radius);
            box-shadow: var(--card-shadow);
            transition: var(--transition);
            background: #fff;
            overflow: hidden;
        }

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

        /* Buttons */
        .btn {
            border-radius: 8px;
            padding: 0.5rem 1.5rem;
            font-weight: 500;
            transition: var(--transition);
            border: none;
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
        }

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

        .btn-primary:hover {
            background: var(--secondary-color);
            transform: translateY(-2px);
            box-shadow: 0 4px 6px rgba(99, 102, 241, 0.3);
        }

        .btn-secondary {
            background: #64748b;
        }

        .btn-secondary:hover {
            background: #475569;
            transform: translateY(-2px);
        }

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

        .btn-success:hover {
            background: #059669;
            transform: translateY(-2px);
        }

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

        .btn-danger:hover {
            background: #dc2626;
            transform: translateY(-2px);
        }

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

        .btn-warning:hover {
            background: #d97706;
            transform: translateY(-2px);
        }

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

        .btn-info:hover {
            background: #2563eb;
            transform: translateY(-2px);
        }

        /* Form Controls */
        .form-control, .form-select {
            border: 2px solid #e2e8f0;
            border-radius: 8px;
            padding: 0.75rem 1rem;
            transition: var(--transition);
            font-weight: 400;
        }

        .form-control:focus, .form-select:focus {
            border-color: var(--primary-color);
            box-shadow: 0 0 0 0.2rem rgba(99, 102, 241, 0.25);
        }

        .form-floating label {
            color: #64748b;
        }

        /* Tables */
        .table {
            border-radius: var(--border-radius);
            overflow: hidden;
            box-shadow: var(--card-shadow);
        }

        .table thead {
            background: var(--dark-color);
            color: white;
        }

        .table thead th {
            font-weight: 600;
            text-transform: uppercase;
            font-size: 0.875rem;
            letter-spacing: 0.5px;
            padding: 1rem;
            border: none;
        }

        .table tbody tr {
            transition: var(--transition);
        }

        .table tbody tr:hover {
            background: #f8fafc;
        }

        .table tbody td {
            padding: 1rem;
            vertical-align: middle;
            border-color: #e2e8f0;
        }

        /* Alerts */
        .alert {
            border: none;
            border-radius: var(--border-radius);
            padding: 1rem 1.5rem;
            font-weight: 500;
            box-shadow: var(--card-shadow);
            animation: slideDown 0.3s ease-out;
        }

        @keyframes slideDown {
            from {
                opacity: 0;
                transform: translateY(-20px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }

        .alert-primary {
            background: #dbeafe;
            color: #1e40af;
        }

        .alert-success {
            background: #d1fae5;
            color: #065f46;
        }

        .alert-danger {
            background: #fee2e2;
            color: #991b1b;
        }

        .alert-warning {
            background: #fef3c7;
            color: #92400e;
        }

        .alert-info {
            background: #dbeafe;
            color: #1e40af;
        }

        /* Pagination */
        .pagination {
            gap: 0.5rem;
        }

        .page-link {
            border: none;
            border-radius: 8px;
            padding: 0.5rem 1rem;
            color: var(--dark-color);
            font-weight: 500;
            transition: var(--transition);
        }

        .page-link:hover {
            background: var(--primary-color);
            color: white;
            transform: translateY(-2px);
        }

        .page-item.active .page-link {
            background: var(--primary-color);
            color: white;
        }

        /* Modals */
        .modal-content {
            border: none;
            border-radius: var(--border-radius);
            box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
        }

        .modal-header {
            background: var(--light-color);
            border-bottom: 1px solid #e2e8f0;
            padding: 1.5rem;
        }

        .modal-title {
            font-weight: 600;
            color: var(--dark-color);
        }

        /* Loader */
        .loader {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            display: flex;
            align-items: center;
            justify-content: center;
            background: rgba(255, 255, 255, 0.95);
            backdrop-filter: blur(5px);
            z-index: 9999;
            display: none;
        }

        #progress-container {
            width: 200px;
            height: 200px;
        }

        /* Welcome Message */
        .welcome-message {
            font-size: 2rem;
            font-weight: 700;
            color: var(--dark-color);
            margin-bottom: 2rem;
            text-align: center;
        }

        /* User Amount Display */
        .user-amount {
            background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
            color: white;
            padding: 1.5rem;
            border-radius: var(--border-radius);
            text-align: center;
            margin-bottom: 2rem;
            box-shadow: var(--card-shadow);
        }

        .user-amount h4 {
            margin: 0;
            font-weight: 600;
        }

        /* Announcement Menu */
        .anouce-menu {
            background: var(--light-color);
            border: 2px solid var(--primary-color);
            border-radius: var(--border-radius);
            padding: 1rem;
            margin-top: auto;
            text-align: center;
            transition: var(--transition);
        }

        .anouce-menu:hover {
            background: var(--primary-color);
        }

        .anouce-menu a {
            color: var(--primary-color);
            text-decoration: none;
            font-weight: 600;
        }

        .anouce-menu:hover a {
            color: white;
        }

        /* Section Headers */
        h1, h2, h3, h4, h5, h6 {
            font-weight: 600;
            color: var(--dark-color);
        }

        /* Custom Scrollbar */
        ::-webkit-scrollbar {
            width: 10px;
        }

        ::-webkit-scrollbar-track {
            background: #f1f5f9;
        }

        ::-webkit-scrollbar-thumb {
            background: var(--primary-color);
            border-radius: 5px;
        }

        ::-webkit-scrollbar-thumb:hover {
            background: var(--secondary-color);
        }

        /* Responsive Design */
        @media (max-width: 768px) {
            .sidebar {
                transform: translateX(-100%);
                position: fixed;
            }

            .sidebar.active {
                transform: translateX(0);
            }

            .content {
                margin-left: 0;
                padding: 1rem;
            }

            .welcome-message {
                font-size: 1.5rem;
            }

            /* Mobile Menu Toggle */
            .mobile-menu-toggle {
                display: block;
                position: fixed;
                top: 1rem;
                left: 1rem;
                z-index: 1001;
                background: var(--primary-color);
                color: white;
                border: none;
                border-radius: 8px;
                padding: 0.75rem;
                cursor: pointer;
            }

            .mobile-menu-toggle-icon {
                font-size: 1.5rem;
            }
        }

        @media (min-width: 769px) {
            .mobile-menu-toggle {
                display: none;
            }
        }

        /* Badge Styles */
        .badge {
            padding: 0.375rem 0.75rem;
            border-radius: 6px;
            font-weight: 500;
            font-size: 0.875rem;
        }

        /* Box Shadow Classes */
        .shadow-sm {
            box-shadow: var(--card-shadow) !important;
        }

        .shadow {
            box-shadow: var(--card-shadow-hover) !important;
        }

        /* Border Radius Classes */
        .rounded {
            border-radius: var(--border-radius) !important;
        }

        /* Smooth Transitions */
        * {
            transition: var(--transition);
        }