SharePoint Menu css

sharepointmenu.css

.ms-core-listMenu-horizontalBox {
    border: 1px lime solid;
}
.ms-core-listMenu-horizontalBox::before {
    content: "Menu";
    color: red;
}
 
.ms-core-listMenu-horizontalBox .ms-core-listMenu-root {
    display: none;
}
  
.ms-core-listMenu-horizontalBox:focus .ms-core-listMenu-root,
.ms-core-listMenu-horizontalBox.showBurger .ms-core-listMenu-root{
    display: inline-block;
}