Hello,

1. Please replace the previous Custom CSS with the following then check back.

.whb-header .wd-nav-main li a {
padding: 0 12px 0 12px;
}

2. You need to put this code to the Custom CSS for the Mobile area then it will work for only mobiles.

.wd-wishlist-btn.wd-action-btn {
    display: none;
}

Best Regards