.menu{width:"100%";overflow:hidden}.menu-item{border-bottom:1px solid #eee}.menu-header{display:flex;justify-content:space-between;align-items:center;padding:10px;cursor:pointer}.icon{font-weight:700;transition:transform .3s ease}.submenu{max-height:0;overflow:hidden;transition:max-height .5s cubic-bezier(.4,0,.2,1);background-color:#fff}.submenu.open{max-height:500px}.submenu-item{padding:10px;border-top:1px solid #eee}