.nv-chv {
    width: 0.55em;
    height: auto;
    margin-left: 0.4em;
    align-self: center;
    transition: transform var(--g-trn-sp, .2s) var(--g-trn-tf, ease);
}

li:is(:hover, :focus-within) > .nv-chv {
    transform: rotate(180deg);
}