Disable mobile navigation icon animation

Site URL: https://justmeatsdeli.com/

I changed the mobile navigation icon on my site to an icon with 3 dots. Unfortunately, when it is pressed, the icon tilts. Is it possible to disable the animation? Or maybe make it display an X icon when it's pressed using CSS?

Site: https://justmeatsdeli.com/

Password: Hey

Add to Home > design > Custom CSS

.burger-inner::after {
    transform: unset !important;
}