:root {
            --bg-gradient: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
            --bg-dark: #0f0f23;
            --bg-card: #1a1a2e;
            --bg-card-hover: #16213e;
            --text-primary: #ffffff;
            --text-secondary: #a8a8b3;
            --text-muted: #6b6b80;
            --border-color: rgba(255, 255, 255, 0.1);
            --accent-primary: #667eea;
            --accent-secondary: #764ba2;
            --accent-glow: rgba(102, 126, 234, 0.5);
            --success: #00d68f;
            --warning: #ffaa00;
            --danger: #ff3d71;
            --info: #00b4d8;
            --tab-inactive: rgba(255, 255, 255, 0.05);
            --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.1);
            --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.2);
            --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.3);
            --shadow-glow: 0 0 40px rgba(102, 126, 234, 0.3);
        }

        .light-theme {
            --bg-gradient: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
            --bg-dark: #ffffff;
            --bg-card: #ffffff;
            --bg-card-hover: #f8f9fa;
            --text-primary: #2c3e50;
            --text-secondary: #6c757d;
            --text-muted: #adb5bd;
            --border-color: rgba(0, 0, 0, 0.08);
            --tab-inactive: rgba(0, 0, 0, 0.03);
            --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.05);
            --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.08);
            --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.12);
            --shadow-glow: 0 0 40px rgba(102, 126, 234, 0.2);
        }

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

        body {
            font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
            background: var(--bg-dark);
            min-height: 100vh;
            color: var(--text-primary);
            transition: all 0.3s ease;
            position: relative;
            overflow-x: hidden;
        }

        body::before {
            content: '';
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: var(--bg-gradient);
            opacity: 0.05;
            pointer-events: none;
            z-index: 0;
        }

        /* Animated Background */
        .bg-animation {
            position: fixed;
            width: 100%;
            height: 100%;
            top: 0;
            left: 0;
            z-index: 0;
            opacity: 0.03;
            pointer-events: none;
        }

        .bg-animation span {
            position: absolute;
            display: block;
            width: 20px;
            height: 20px;
            background: var(--accent-primary);
            animation: move 25s linear infinite;
            bottom: -150px;
        }

        .bg-animation span:nth-child(1) { left: 25%; width: 80px; height: 80px; animation-delay: 0s; }
        .bg-animation span:nth-child(2) { left: 10%; width: 20px; height: 20px; animation-delay: 2s; animation-duration: 12s; }
        .bg-animation span:nth-child(3) { left: 70%; width: 20px; height: 20px; animation-delay: 4s; }
        .bg-animation span:nth-child(4) { left: 40%; width: 60px; height: 60px; animation-delay: 0s; animation-duration: 18s; }
        .bg-animation span:nth-child(5) { left: 65%; width: 20px; height: 20px; animation-delay: 0s; }
        .bg-animation span:nth-child(6) { left: 75%; width: 110px; height: 110px; animation-delay: 3s; }
        .bg-animation span:nth-child(7) { left: 35%; width: 150px; height: 150px; animation-delay: 7s; }
        .bg-animation span:nth-child(8) { left: 50%; width: 25px; height: 25px; animation-delay: 15s; animation-duration: 45s; }
        .bg-animation span:nth-child(9) { left: 20%; width: 15px; height: 15px; animation-delay: 2s; animation-duration: 35s; }
        .bg-animation span:nth-child(10) { left: 85%; width: 150px; height: 150px; animation-delay: 0s; animation-duration: 11s; }

        @keyframes move {
            0% {
                transform: translateY(0) rotate(0deg);
                opacity: 1;
                border-radius: 0;
            }
            100% {
                transform: translateY(-1000px) rotate(720deg);
                opacity: 0;
                border-radius: 50%;
            }
        }

        .main-container {
            max-width: 1600px;
            margin: 0 auto;
            padding: 20px;
            position: relative;
            z-index: 1;
        }

        /* Header Section */
        .header {
            background: var(--bg-card);
            border-radius: 20px;
            padding: 30px;
            margin-bottom: 30px;
            backdrop-filter: blur(20px);
            border: 1px solid var(--border-color);
            box-shadow: var(--shadow-lg);
            position: relative;
            overflow: hidden;
        }

        .header::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 4px;
            background: var(--bg-gradient);
        }

        .header-content {
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 20px;
        }

        .header-left {
            display: flex;
            align-items: center;
            gap: 20px;
        }

        .logo {
            width: 60px;
            height: 60px;
            background: var(--bg-gradient);
            border-radius: 16px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 24px;
            color: white;
            box-shadow: var(--shadow-glow);
            animation: pulse 2s ease-in-out infinite;
        }

        @keyframes pulse {
            0%, 100% { transform: scale(1); }
            50% { transform: scale(1.05); }
        }

        .header-title h1 {
            font-size: 2rem;
            font-weight: 700;
            background: var(--bg-gradient);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            margin-bottom: 4px;
        }

        .header-title p {
            color: var(--text-secondary);
            font-size: 0.9rem;
        }

        .header-actions {
            display: flex;
            align-items: center;
            gap: 15px;
        }

        .user-info {
            display: flex;
            align-items: center;
            gap: 12px;
            background: var(--tab-inactive);
            padding: 10px 20px;
            border-radius: 50px;
            border: 1px solid var(--border-color);
        }

        .user-avatar {
            width: 32px;
            height: 32px;
            background: var(--bg-gradient);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            color: white;
            font-size: 14px;
        }

        .user-details {
            display: flex;
            flex-direction: column;
        }

        .user-details span:first-child {
            font-size: 0.8rem;
            color: var(--text-muted);
        }

        .user-details strong {
            color: var(--text-primary);
            font-size: 0.9rem;
        }

        .btn-icon {
            width: 44px;
            height: 44px;
            border-radius: 50%;
            border: 1px solid var(--border-color);
            background: var(--bg-card);
            color: var(--text-primary);
            display: flex;
            align-items: center;
            justify-content: center;
            cursor: pointer;
            transition: all 0.3s ease;
            font-size: 18px;
        }

        .btn-icon:hover {
            transform: scale(1.1);
            border-color: var(--accent-primary);
            box-shadow: var(--shadow-glow);
        }

        .btn-logout {
            background: linear-gradient(135deg, var(--danger), #ff1744);
            border: none;
            color: white;
        }

        /* Stats Cards */
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 20px;
            margin-bottom: 30px;
        }

        .stat-card {
            background: var(--bg-card);
            border-radius: 16px;
            padding: 24px;
            border: 1px solid var(--border-color);
            position: relative;
            overflow: hidden;
            transition: all 0.3s ease;
        }

        .stat-card:hover {
            transform: translateY(-5px);
            box-shadow: var(--shadow-lg);
            border-color: var(--accent-primary);
        }

        .stat-card::after {
            content: '';
            position: absolute;
            top: 0;
            right: 0;
            width: 100px;
            height: 100px;
            background: var(--bg-gradient);
            opacity: 0.1;
            border-radius: 50%;
            transform: translate(30px, -30px);
        }

        .stat-content {
            position: relative;
            z-index: 1;
        }

        .stat-icon {
            width: 48px;
            height: 48px;
            background: var(--bg-gradient);
            border-radius: 12px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: white;
            font-size: 20px;
            margin-bottom: 16px;
        }

        .stat-value {
            font-size: 2rem;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 4px;
        }

        .stat-label {
            color: var(--text-secondary);
            font-size: 0.9rem;
        }

        /* Tabs Navigation */
        .tabs-container {
            background: var(--bg-card);
            border-radius: 20px;
            padding: 8px;
            margin-bottom: 30px;
            border: 1px solid var(--border-color);
            box-shadow: var(--shadow-md);
        }

        .tabs-nav {
            display: flex;
            gap: 8px;
            overflow-x: auto;
            scrollbar-width: none;
        }

        .tabs-nav::-webkit-scrollbar {
            display: none;
        }

        .tab-btn {
            flex: 1;
            min-width: 150px;
            padding: 14px 24px;
            background: transparent;
            border: none;
            border-radius: 12px;
            color: var(--text-secondary);
            font-size: 0.95rem;
            font-weight: 500;
            cursor: pointer;
            transition: all 0.3s ease;
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 10px;
            position: relative;
        }

        .tab-btn:hover {
            background: var(--tab-inactive);
            color: var(--text-primary);
        }

        .tab-btn.active {
            background: var(--bg-gradient);
            color: white;
            box-shadow: var(--shadow-md);
        }

        .tab-btn i {
            font-size: 18px;
        }

        .tab-badge {
            background: rgba(255, 255, 255, 0.2);
            color: white;
            padding: 2px 8px;
            border-radius: 12px;
            font-size: 0.75rem;
            font-weight: 600;
            margin-left: 8px;
        }

        /* Tab Content */
        .tab-content {
            display: none;
            animation: fadeIn 0.5s ease;
        }

        .tab-content.active {
            display: block;
        }

        @keyframes fadeIn {
            from { opacity: 0; transform: translateY(10px); }
            to { opacity: 1; transform: translateY(0); }
        }

        /* Management Cards */
        .management-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
            gap: 20px;
            margin-bottom: 30px;
        }

        .management-card {
            background: var(--bg-card);
            border-radius: 16px;
            padding: 24px;
            border: 1px solid var(--border-color);
            transition: all 0.3s ease;
        }

        .management-card:hover {
            transform: translateY(-3px);
            box-shadow: var(--shadow-lg);
            border-color: var(--accent-primary);
        }

        .card-header {
            display: flex;
            align-items: center;
            gap: 12px;
            margin-bottom: 20px;
        }

        .card-icon {
            width: 40px;
            height: 40px;
            background: var(--bg-gradient);
            border-radius: 10px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: white;
            font-size: 18px;
        }

        .card-title h3 {
            font-size: 1.1rem;
            color: var(--text-primary);
            margin-bottom: 2px;
        }

        .card-title p {
            font-size: 0.85rem;
            color: var(--text-secondary);
        }

        /* Form Controls */
        .form-group {
            margin-bottom: 16px;
        }

        .form-control {
            width: 100%;
            padding: 12px 16px;
            background: var(--tab-inactive);
            border: 2px solid var(--border-color);
            border-radius: 10px;
            color: var(--text-primary);
            font-size: 0.95rem;
            transition: all 0.3s ease;
        }

        .form-control:focus {
            outline: none;
            border-color: var(--accent-primary);
            background: var(--bg-card-hover);
            box-shadow: 0 0 0 4px rgba(102, 126, 234, 0.1);
        }

        .form-control::placeholder {
            color: var(--text-muted);
        }

        .input-group {
            display: flex;
            gap: 12px;
            align-items: center;
        }

        .input-group .form-control {
            flex: 1;
        }

        /* Buttons */
        .btn {
            padding: 12px 24px;
            border: none;
            border-radius: 10px;
            font-size: 0.95rem;
            font-weight: 600;
            cursor: pointer;
            transition: all 0.3s ease;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            position: relative;
            overflow: hidden;
        }

        .btn::before {
            content: '';
            position: absolute;
            top: 50%;
            left: 50%;
            width: 0;
            height: 0;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.5);
            transform: translate(-50%, -50%);
            transition: width 0.6s, height 0.6s;
        }

        .btn:active::before {
            width: 300px;
            height: 300px;
        }

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

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

        .btn-success {
            background: linear-gradient(135deg, var(--success), #00b887);
            color: white;
        }

        .btn-danger {
            background: linear-gradient(135deg, var(--danger), #ff1744);
            color: white;
        }

        .btn-warning {
            background: linear-gradient(135deg, var(--warning), #ff8800);
            color: white;
        }

        .btn-info {
            background: linear-gradient(135deg, var(--info), #0099cc);
            color: white;
        }

        .btn-sm {
            padding: 8px 16px;
            font-size: 0.85rem;
        }

        .btn-block {
            width: 100%;
        }

        /* Search Section */
        .search-section {
            background: var(--bg-card);
            border-radius: 16px;
            padding: 20px;
            margin-bottom: 20px;
            border: 1px solid var(--border-color);
        }

        .search-wrapper {
            display: flex;
            gap: 12px;
            align-items: center;
        }

        .search-input {
            flex: 1;
            padding: 14px 20px 14px 48px;
            background: var(--tab-inactive);
            border: 2px solid var(--border-color);
            border-radius: 50px;
            color: var(--text-primary);
            font-size: 0.95rem;
            transition: all 0.3s ease;
            position: relative;
        }

        .search-icon {
            position: absolute;
            left: 20px;
            top: 50%;
            transform: translateY(-50%);
            color: var(--text-muted);
            pointer-events: none;
        }

        .search-input-wrapper {
            position: relative;
            flex: 1;
        }

        .search-input:focus {
            outline: none;
            border-color: var(--accent-primary);
            box-shadow: 0 0 0 4px rgba(102, 126, 234, 0.1);
        }

        /* Table */
        .table-container {
            background: var(--bg-card);
            border-radius: 16px;
            overflow: hidden;
            border: 1px solid var(--border-color);
            box-shadow: var(--shadow-md);
        }

        .table {
            width: 100%;
            border-collapse: collapse;
        }

        .table thead {
            background: var(--bg-gradient);
        }

        .table th {
            padding: 16px;
            text-align: left;
            color: white;
            font-weight: 600;
            font-size: 0.9rem;
            text-transform: uppercase;
            letter-spacing: 0.5px;
        }

        .table td {
            padding: 16px;
            border-bottom: 1px solid var(--border-color);
            color: var(--text-primary);
            vertical-align: middle;
        }

        .table tbody tr {
            transition: all 0.3s ease;
        }

        .table tbody tr:hover {
            background: var(--tab-inactive);
        }

        .table tbody tr:last-child td {
            border-bottom: none;
        }

        /* Status Badges */
        .badge {
            padding: 6px 12px;
            border-radius: 20px;
            font-size: 0.75rem;
            font-weight: 600;
            text-transform: uppercase;
            letter-spacing: 0.5px;
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }

        .badge-success {
            background: rgba(0, 214, 143, 0.1);
            color: var(--success);
            border: 1px solid rgba(0, 214, 143, 0.2);
        }

        .badge-danger {
            background: rgba(255, 61, 113, 0.1);
            color: var(--danger);
            border: 1px solid rgba(255, 61, 113, 0.2);
        }

        .badge-warning {
            background: rgba(255, 170, 0, 0.1);
            color: var(--warning);
            border: 1px solid rgba(255, 170, 0, 0.2);
        }

        .badge-info {
            background: rgba(0, 180, 216, 0.1);
            color: var(--info);
            border: 1px solid rgba(0, 180, 216, 0.2);
        }

        /* Action Buttons */
        .actions-group {
            display: flex;
            gap: 8px;
            flex-wrap: wrap;
        }

        .btn-action {
            width: 32px;
            height: 32px;
            border-radius: 8px;
            border: 1px solid var(--border-color);
            background: var(--tab-inactive);
            color: var(--text-primary);
            display: flex;
            align-items: center;
            justify-content: center;
            cursor: pointer;
            transition: all 0.3s ease;
            font-size: 14px;
        }

        .btn-action:hover {
            transform: scale(1.1);
            border-color: var(--accent-primary);
            background: var(--bg-gradient);
            color: white;
        }

        /* Notifications */
        .notification {
            position: fixed;
            top: 20px;
            right: 20px;
            padding: 16px 24px;
            border-radius: 12px;
            background: white;
            box-shadow: var(--shadow-lg);
            transform: translateX(400px);
            transition: all 0.3s ease;
            z-index: 9999;
            display: flex;
            align-items: center;
            gap: 12px;
            max-width: 400px;
        }

        .notification.show {
            transform: translateX(0);
        }

        .notification-icon {
            width: 40px;
            height: 40px;
            border-radius: 10px;
            display: flex;
            align-items: center;
            justify-content: center;
            flex-shrink: 0;
        }

        .notification.success .notification-icon {
            background: rgba(0, 214, 143, 0.1);
            color: var(--success);
        }

        .notification.error .notification-icon {
            background: rgba(255, 61, 113, 0.1);
            color: var(--danger);
        }

        .notification-content {
            flex: 1;
        }

        .notification-title {
            font-weight: 600;
            color: var(--text-primary);
            margin-bottom: 2px;
        }

        .notification-message {
            font-size: 0.9rem;
            color: var(--text-secondary);
        }

        /* Loading States */
        .loading-container {
            padding: 60px;
            text-align: center;
            color: var(--text-secondary);
        }

        .loading-spinner {
            width: 48px;
            height: 48px;
            border: 3px solid var(--border-color);
            border-top-color: var(--accent-primary);
            border-radius: 50%;
            animation: spin 1s linear infinite;
            margin: 0 auto 20px;
        }

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

        /* Empty State */
        .empty-state {
            padding: 60px;
            text-align: center;
            color: var(--text-secondary);
        }

        .empty-icon {
            width: 80px;
            height: 80px;
            background: var(--tab-inactive);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 20px;
            font-size: 32px;
            color: var(--text-muted);
        }

        /* Responsive */
        @media (max-width: 768px) {
            .main-container {
                padding: 10px;
            }

            .header-content {
                flex-direction: column;
                align-items: flex-start;
            }

            .stats-grid {
                grid-template-columns: 1fr;
            }

            .management-grid {
                grid-template-columns: 1fr;
            }

            .tabs-nav {
                overflow-x: auto;
            }

            .tab-btn {
                min-width: 120px;
                padding: 12px 16px;
                font-size: 0.85rem;
            }

            .table-container {
                overflow-x: auto;
            }

            .search-wrapper {
                flex-direction: column;
            }

            .search-input-wrapper {
                width: 100%;
            }
        }