:root {
            --primary-color: #1f76d8;
            --light-bg: #f8f9fa;
        }
        
 
 .account-container {
            max-width: 1200px;
            margin: 30px auto;
            box-shadow: 0 10px 30px rgba(0,0,0,0.08);
            border-radius: 15px;
            overflow: hidden;
            background: white;
        }
        
        .account-header {
            background: linear-gradient(135deg, var(--primary-color) 0%, #1666bf 100%);
            color: white;
            padding: 25px;
            position: relative;
            text-align: center;
        }
        
        .account-header h2 {
            font-weight: 700;
            margin: 0;
            letter-spacing: 0.5px;
            font-size: 2rem;
        }
        
        .sidebar {
            background: white;
            padding: 0;
            height: 100%;
            border-right: 1px solid #eaeaea;
        }
        
        .sidebar-menu {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        
        .sidebar-menu li {
            padding: 16px 25px;
            border-bottom: 1px solid #f0f0f0;
            transition: all 0.3s;
            cursor: pointer;
            font-weight: 500;
            color: #495057;
            display: flex;
            align-items: center;
        }
        
        .sidebar-menu li:hover {
            background-color: #f8f9ff;
        }
        
        .sidebar-menu li.active {
            background-color: #e6f0ff;
            border-left: 4px solid var(--primary-color);
            font-weight: 600;
            color: var(--primary-color);
        }
        
        .sidebar-menu li i {
            margin-right: 15px;
            width: 22px;
            text-align: center;
            font-size: 1.1rem;
        }
        
        .logout-btn {
            color: #dc3545;
        }
        
        .logout-btn:hover {
            background-color: #ffe6e9 !important;
        }
        
        .account-content {
            padding: 30px;
            min-height: 500px;
        }
        
        .section-title {
            color: var(--primary-color);
            border-bottom: 2px solid var(--primary-color);
            padding-bottom: 12px;
            margin-bottom: 25px;
            font-weight: 600;
            font-size: 1.5rem;
        }
        
        .form-label {
            font-weight: 600;
            color: #495057;
            margin-bottom: 8px;
        }
        
        .info-text {
            font-style: italic;
            color: #6c757d;
            font-size: 0.9rem;
            margin-top: 5px;
        }
        
        .btn-primary {
            background: linear-gradient(135deg, var(--primary-color) 0%, #1666bf 100%);
            border: none;
            padding: 12px 30px;
            font-weight: 600;
            transition: all 0.3s;
            border-radius: 8px;
            box-shadow: 0 4px 10px rgba(31, 118, 216, 0.25);
        }
        
        .btn-primary:hover {
            transform: translateY(-3px);
            box-shadow: 0 6px 15px rgba(31, 118, 216, 0.35);
        }
        
        .order-history {
            margin-top: 10px;
        }
        
        .table th {
            background-color: var(--primary-color);
            color: white;
            font-weight: 600;
            vertical-align: middle;
            padding: 15px;
            font-size: 1.05rem;
        }
        
        .table-striped tbody tr:nth-of-type(odd) {
            background-color: rgba(31, 118, 216, 0.05);
        }
        
        .table td {
            padding: 12px 15px;
            vertical-align: middle;
        }
        
        .action-btn {
            padding: 8px 15px;
            font-size: 0.9rem;
            border-radius: 6px;
            transition: all 0.2s;
        }
        
        .status-badge {
            padding: 7px 14px;
            border-radius: 20px;
            font-size: 0.85rem;
            font-weight: 500;
            display: inline-block;
        }
        
        .status-pending {
            background-color: #fff3cd;
            color: #856404;
        }
        
        .status-completed {
            background-color: #d4edda;
            color: #155724;
        }
        
        .status-shipped {
            background-color: #cce5ff;
            color: #004085;
        }
        
        .detail-link {
            color: var(--primary-color);
            text-decoration: none;
            font-weight: 500;
            transition: all 0.2s;
        }
        
        .detail-link:hover {
            text-decoration: underline;
            color: #0d5db1;
        }
        
        .tab-content {
            display: none;
            animation: fadeIn 0.4s ease-in-out;
        }
        
        .tab-content.active {
            display: block;
        }
        
        @keyframes fadeIn {
            from { opacity: 0; transform: translateY(10px); }
            to { opacity: 1; transform: translateY(0); }
        }
        
        .user-avatar {
            width: 100px;
            height: 100px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--primary-color) 0%, #1666bf 100%);
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 20px;
            color: white;
            font-size: 2.5rem;
            font-weight: 600;
        }
        
        @media (max-width: 992px) {
            .sidebar {
                border-right: none;
                border-bottom: 1px solid #eaeaea;
            }
            
            .account-content {
                padding: 20px;
            }
        }
        
        @media (max-width: 768px) {
            .account-header h2 {
                font-size: 1.6rem;
            }
            
            .section-title {
                font-size: 1.3rem;
            }
        }