.nav-dropdown-menu {
display: none;
opacity: 0;
transform: translateY(8px);
transition: opacity 150ms ease, transform 150ms ease;
}
.nav-dropdown.is-open .nav-dropdown-menu {
display: block;
opacity: 1;
transform: translateY(0);
}
.nav-dropdown-arrow {
transition: transform 150ms ease;
}
.nav-dropdown.is-open .nav-dropdown-arrow {
transform: rotate(180deg);
}
