.site-nav li a[aria-current] {
    position: relative;
    color: var(--lime);
}

.site-nav li a[aria-current]::after {
    position: absolute;
    right: 0;
    bottom: -9px;
    left: 0;
    height: 2px;
    border-radius: 2px;
    background: currentColor;
    content: "";
}

.site-nav li a[aria-current]:hover {
    color: var(--lime-bright);
}

@media (max-width: 820px) {
    .nav-enhanced .site-nav li a[aria-current]::after {
        right: auto;
        bottom: 8px;
        width: 32px;
    }
}