[aria-labelledby='menu-magento-backend-content'] {
    [role='menu'] {
        .submenu ul {
            max-height: 40vh;
            overflow-y: auto;
            overflow-x: hidden;

            &::-webkit-scrollbar-track {
                background: transparent;
            }

            &::-webkit-scrollbar-thumb {
                background-color: rgba(0, 0, 0, 0.4);
            border-radius: 4px;
                transition: background-color 0.3s ease;
            }

            &::-webkit-scrollbar-thumb:hover {
                background-color: rgba(0, 0, 0, 0.35);
            }

            (minimalist)
            scrollbar-width: thin;
                scrollbar-color: rgba(0, 0, 0, 0.4) transparent;
        }
    }
}