i.ba-icons.ba-icon-close.ba-overlay-section-close::before {
    font-size: 50px !important;
    display: inline-block;
    transition: transform 0.35s cubic-bezier(.4,0,.2,1);
}

i.ba-icons.ba-icon-close.ba-overlay-section-close:hover::before {
    transform: rotate(90deg);
}