Kadence Nav Underline Animation

CSS
#primary-menu > li > a {
    position: relative;
    text-decoration: none;
    color: inherit;
}

/* Underline */
#primary-menu > li > a::after {
    content: "";
    position: absolute;
    bottom: 0;
    left: 12px; /* a padding-left */
    right: 12px; /* a padding-right */
    height: 2px;
    background: var(--global-palette2);
    opacity: 0;
    transform: scaleX(0);
    transform-origin: right; /* animation start. left, center, right */
    transition: opacity 0.3s ease, transform 0.3s ease;
}

#primary-menu > li > a:hover::after,
#primary-menu > li > a:focus-visible::after,
#primary-menu > li.current-menu-item > a::after {
    opacity: 1;
    transform: scaleX(1);
}