[aria-labelledby=menu-magento-backend-content]{[role=menu]{.submenu ul{max-height:40vh;overflow-y:auto;overflow-x:hidden;&::-webkit-scrollbar-track{background:0 0}&::-webkit-scrollbar-thumb{background-color:rgba(0,0,0,.4);border-radius:4px;transition:background-color .3s ease}&::-webkit-scrollbar-thumb:hover{background-color:rgba(0,0,0,.35)}(minimalist) scrollbar-width:thin;scrollbar-color:rgba(0,0,0,0.4) transparent;}}}