@mixin mb2_course_section() {

    margin: 3rem 0 2rem 0;
    padding: .75rem 1rem;
    background-color: lighten($color_gray3, 3%);
    font-size: $fsheading4;

    @include mb2_transition1(background-color, .15s);
    @include mb2_border_radius(.15rem);

    a:not(.dropdown-item):not(.menu-action),
    > h3 a {
        color: var(--mb2-pb-headingscolor);        
    }

    &:hover {
        background-color: $color_gray3;
    }

}




@mixin mb2_course_section_main() {}