 :root {
            --primary-blue: #1e9ff2;
            --sidebar-bg: #f8f9fa;
            --text-muted: #6c757d;
        }
        body {
            background: linear-gradient(135deg, var(--primary-blue) 0%, #0ea5e9 100%);
            min-height: 100vh;
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
        }
        .main-container {
            background: white;
            border-radius: 20px;
            margin: 20px;
            min-height: calc(100vh - 40px);
            overflow: hidden;
            box-shadow: 0 10px 30px rgba(0,0,0,0.1);
        }
        .sidebar {
            background: var(--sidebar-bg);
            min-height: 100%;
            padding: 0;
        }
        .sidebar-nav {
            list-style: none;
            padding: 20px 0;
            margin: 0;
        }
        .sidebar-nav li {
            margin: 0;
        }
        .sidebar-nav a {
            display: flex;
            align-items: center;
            padding: 15px 25px;
            color: #333;
            text-decoration: none;
            transition: all 0.3s ease;
            border-left: 3px solid transparent;
        }
        .sidebar-nav a:hover {
            background: rgba(30, 159, 242, 0.1);
            border-left-color: var(--primary-blue);
        }
        .sidebar-nav a.active {
            background: rgba(30, 159, 242, 0.15);
            border-left-color: var(--primary-blue);
            color: var(--primary-blue);
            font-weight: 600;
        }
        .sidebar-nav i {
            margin-right: 12px;
            width: 20px;
            text-align: center;
        }
        .content-area {
            padding: 30px;
            background: white;
        }
        .header-section {
            display: flex;
            justify-content: space-between;
            align-items: center;
            margin-bottom: 30px;
        }
        .page-title {
            font-size: 2rem;
            font-weight: 600;
            color: #333;
            margin: 0;
        }
        .download-btn {
            background: var(--primary-blue);
            color: white;
            border: none;
            padding: 12px 24px;
            border-radius: 8px;
            font-weight: 600;
            text-transform: uppercase;
            letter-spacing: 0.5px;
            transition: all 0.3s ease;
        }
        .download-btn:hover {
            background: #0ea5e9;
            transform: translateY(-2px);
            box-shadow: 0 5px 15px rgba(30, 159, 242, 0.3);
        }
        .hardware-item {
            background: white;
            border: 1px solid #e9ecef;
            border-radius: 12px;
            margin-bottom: 20px;
            padding: 20px;
            transition: all 0.3s ease;
            border-left: 4px solid var(--primary-blue);
        }
        .hardware-item:hover {
            box-shadow: 0 5px 20px rgba(0,0,0,0.1);
            transform: translateY(-2px);
        }
        .hardware-title {
            color: var(--primary-blue);
            font-weight: 600;
            font-size: 1.1rem;
            margin-bottom: 15px;
        }
        .stats-row {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(100px, 1fr));
            gap: 20px;
            align-items: center;
        }
        .stat-item {
            text-align: center;
        }
        .stat-label {
            font-size: 0.8rem;
            color: var(--text-muted);
            text-transform: uppercase;
            font-weight: 600;
            margin-bottom: 5px;
        }
        .stat-value {
            font-size: 1.2rem;
            font-weight: 700;
        }
        .stat-value.total { color: var(--primary-blue); }
        .stat-value.ready { color: #28a745; }
        .stat-value.orders { color: #ffc107; }
        .stat-value.error { color: #dc3545; }
        .stat-value.earn { color: #28a745; }
        .logout-section {
            margin-top: auto;
            padding: 20px 0;
        }
        @media (max-width: 768px) {
            .main-container {
                margin: 10px;
                border-radius: 15px;
            }
            .content-area {
                padding: 20px;
            }
            .header-section {
                flex-direction: column;
                gap: 15px;
                text-align: center;
            }
            .page-title {
                font-size: 1.5rem;
            }
            .stats-row {
                grid-template-columns: repeat(2, 1fr);
                gap: 15px;
            }
            .sidebar-nav a {
                padding: 12px 20px;
            }
        }
        @media (max-width: 576px) {
            .stats-row {
                grid-template-columns: 1fr;
                gap: 10px;
            }
            .stat-item {
                display: flex;
                justify-content: space-between;
                align-items: center;
                text-align: left;
            }
            .stat-label {
                margin-bottom: 0;
            }
        }