How to make an animated item in a primary menu in Astra

Code that needs to be added in a Theme Customizer's Additional CSS section:

.menu-badge {
    font-size: .5em;
    margin-left: 2px;
    position: relative;
    top: -10px;
    margin-bottom: 13px;
    color: #ffffff;
    background-color: #cd5c5c;
    padding: 1px 3px;
    border-radius: 3px;
    line-height: 1.5em;
}
.badge-bounce {
    animation: bouncing .8s cubic-bezier(0.1,0.05,0.05,1) 0s infinite alternate both;
}
@keyframes bouncing { 
    0%{top:-6px}
    100%{top:-10px}
}

In a menu item add:

Two <span class="menu-badge badge-bounce">Words</span>

"Words" will be bouncing.