/* Clean Minimal Header Styles */
        .main-header {
            background: linear-gradient(135deg, #1a237e 0%, #283593 100%);
            color: white;
            padding: 15px 0;
            box-shadow: 0 2px 10px rgba(0,0,0,0.1);
            position: sticky;
            top: 0;
            z-index: 1000;
        }
        
        .header-content {
            display: flex;
            align-items: center;
            justify-content: space-between;
        }
        
        .brand-section {
            display: flex;
            align-items: center;
            flex: 1;
        }
        
        .brand-logo {
            margin-right: 15px;
        }
        
        .brand-logo i {
            font-size: 32px;
            color: white;
        }
        
        .brand-text {
            line-height: 1.2;
        }
        
        .brand-title {
            font-size: 24px;
            font-weight: 600;
            margin: 0;
            color: white;
            letter-spacing: 0.5px;
        }
        
        .brand-subtitle {
            font-size: 14px;
            color: rgba(255,255,255,0.8);
            margin: 0;
            font-weight: 400;
        }
        
        /* User Actions Section */
        .user-actions {
            display: flex;
            align-items: center;
            gap: 10px;
        }
        
        /* Header Icon Buttons */
        .header-icon-btn {
            position: relative;
            width: 40px;
            height: 40px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            color: white;
            font-size: 18px;
            transition: all 0.3s ease;
            background: rgba(255,255,255,0.1);
            border: 1px solid rgba(255,255,255,0.2);
        }
        
        .header-icon-btn:hover {
            background: rgba(255,255,255,0.2);
            transform: translateY(-2px);
        }
        
        .notification-badge {
            position: absolute;
            top: -5px;
            right: -5px;
            background: #ff4081;
            color: white;
            font-size: 11px;
            min-width: 18px;
            height: 18px;
            border-radius: 9px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 600;
        }
        
        /* User Profile Dropdown */
        .user-profile {
            display: flex;
            align-items: center;
            background: rgba(255,255,255,0.1);
            padding: 6px 12px;
            border-radius: 25px;
            cursor: pointer;
            transition: all 0.3s ease;
            border: 1px solid rgba(255,255,255,0.2);
            min-width: 150px;
        }
        
        .user-profile:hover {
            background: rgba(255,255,255,0.15);
        }
        
        .user-avatar {
            width: 36px;
            height: 36px;
            border-radius: 50%;
            background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
            color: white;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 600;
            font-size: 14px;
            margin-right: 10px;
        }
        
        .user-info {
            flex: 1;
        }
        
        .user-name {
            font-size: 14px;
            font-weight: 600;
            margin: 0;
            color: white;
        }
        
        .user-role {
            font-size: 12px;
            color: rgba(255,255,255,0.8);
            margin: 0;
        }
        
        .dropdown-arrow {
            color: rgba(255,255,255,0.7);
            font-size: 12px;
            margin-left: 5px;
        }
        
        /* Sidebar Toggle */
        .sidebar-toggle-btn {
            background: none;
            border: none;
            color: white;
            font-size: 20px;
            padding: 8px;
            border-radius: 50%;
            transition: all 0.3s ease;
            display: flex;
            align-items: center;
            justify-content: center;
        }
        
        .sidebar-toggle-btn:hover {
            background: rgba(255,255,255,0.1);
        }
        
        /* Dropdown Menu Customization */
        .dropdown-menu {
            border: none;
            box-shadow: 0 5px 15px rgba(0,0,0,0.1);
            border-radius: 10px;
            overflow: hidden;
        }
        
        .dropdown-item {
            padding: 10px 15px;
            display: flex;
            align-items: center;
            transition: all 0.3s ease;
        }
        
        .dropdown-item:hover {
            background: #f8f9fa;
        }
        
        .dropdown-item i {
            width: 20px;
            margin-right: 10px;
            text-align: center;
        }
        
        /* Main Content Adjustments */
        .main-content {
            padding-top: 20px;
        }
        
        /* Sub Category Specific Styles */
        .sub-category-header {
            background: linear-gradient(135deg, #6f42c1 0%, #d63384 100%);
            color: white;
            padding: 20px;
            border-radius: 10px;
            margin-bottom: 20px;
        }
        
        .sub-category-card {
            border: 1px solid #dee2e6;
            border-radius: 10px;
            transition: all 0.3s ease;
            background: #fff;
            overflow: hidden;
        }
        
        .sub-category-card:hover {
            transform: translateY(-3px);
            box-shadow: 0 5px 15px rgba(0,0,0,0.1);
        }
        
        .category-badge {
            padding: 4px 10px;
            border-radius: 12px;
            font-size: 11px;
            font-weight: 600;
            display: inline-block;
            margin-bottom: 5px;
        }
        
        .sub-category-icon {
            width: 40px;
            height: 40px;
            border-radius: 8px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 18px;
            margin-right: 12px;
        }
        
        .sub-category-code {
            font-family: 'Courier New', monospace;
            font-weight: bold;
            font-size: 14px;
            letter-spacing: 0.5px;
        }
        
        .status-dot {
            width: 8px;
            height: 8px;
            border-radius: 50%;
            display: inline-block;
            margin-right: 5px;
        }
        
        .status-active {
            background-color: #198754;
        }
        
        .status-inactive {
            background-color: #dc3545;
        }
        
        .items-count {
            font-size: 12px;
            padding: 2px 8px;
            border-radius: 10px;
            background-color: #e9ecef;
            color: #495057;
        }
        
        /* Responsive Styles */
        @media (max-width: 768px) {
            .header-content {
                flex-wrap: wrap;
            }
            
            .brand-section {
                margin-bottom: 10px;
            }
            
            .user-actions {
                width: 100%;
                justify-content: space-between;
            }
            
            .user-profile {
                min-width: auto;
                padding: 6px 8px;
            }
            
            .user-name {
                display: none;
            }
            
            .user-role {
                display: none;
            }
            
            .user-avatar {
                margin-right: 0;
            }
            
            .sub-category-icon {
                width: 35px;
                height: 35px;
                font-size: 16px;
                margin-right: 10px;
            }
        }
        
        @media (max-width: 576px) {
            .brand-title {
                font-size: 20px;
            }
            
            .brand-subtitle {
                font-size: 12px;
            }
            
            .header-icon-btn {
                width: 36px;
                height: 36px;
                font-size: 16px;
            }
        }