@mixin mb2_collabsible_item_icon() {
    $icon_size: 2.1rem;

    &:before {
        @include mb2_font_bootstrapicons();
        
        position: absolute;
        display: inline-flex !important;
        width: $icon_size;
        flex: 0 0 $icon_size;
        height: $icon_size;
        right: .45rem;
        top: 50%;
        margin-top: ($icon_size/2) * -1;
        justify-content: center;
        align-items: center;
        color: $textcolor;
        font-size: 1.4rem;
        font-weight: var(--mb2-pb-fwlight);
        cursor: pointer;
    }

}


@mixin mb2_collabsible_item() {
    margin-left: 0;
    border: 0;
    margin-bottom: .8rem;

    legend,
    .categoryname,
    [data-toggle="collapse"] {

        margin: 0 !important;
        font-size: inherit;
        position: relative;
        font-weight: var(--mb2-pb-fwheadings) !important;
        padding: .7rem 1rem !important;
        background-color: lighten($color_gray3, 2%);
        line-height: inherit;
        @include mb2_transition1(all, .15s);
		@include mb2_border_radius(.15rem);
		border: 0;

        > button,
        > a {
            color: inherit;
        }

    }

   
    /* ======================= STYLE FOR MOODLE SETTINGS COLLAPSIBLE ITEM */

    legend {

        &.sr-only {
            padding: 0 !important;
            border: 0;
            background-color: transparent !important;
        }

        > a {

            &.fheader {
                padding: 0 !important;
                margin-left: 0;
                display: block;
                position: relative;
                background-image: none !important;
                @include mb2_collabsible_item_icon();

                &:before {
                    right: 0;
                    text-indent: 1px;
                    line-height: 22px !important;
                }
            }

            &.btn {
                position: absolute;
                right: 3rem;
                top: .6rem;
            }
        }


    }

    &.collapsed {
        legend {
            > a {
                &.fheader {
                    &:before {
                        content: '\0002b';
                    }
                }
            }

            background-color: lighten($color_gray3,2.8%);

        }
    }

    /* ======================= STYLE FOR COURSE CATEGORIES TREE */

    .categoryname {

        --mb2-catcolor0: rgba(0,0,0,.1);

        padding: .7rem 2.45rem !important;
        background-image: none !important;
        @include mb2_collabsible_item_icon();

    
        .categoryname {
            margin-top: .8rem !important;
        }

        > .spinner {
            opacity: .25;
            margin-left: .4rem;
            animation: mb2spinn 2s infinite linear;

            @keyframes mb2spinn {
                from {
                  transform: rotate(0deg);
                }
                to {
                  transform: rotate(359deg);
                }
            }
        }


        /* ================= CATEGORY COLOR ELEMENT */

        &:after {
            content: '';
            display: block;
            position: absolute;
            left: calc(1.225rem - 5px);
            width: 10px;
            height: 10px;
            top: 50%;
            margin-top: -5px;
            border-radius: 50%;
            background-color: var(--mb2-catcolor0);
        }

    }

    &.with_children {
        > div > .categoryname {
            &:before {
                content: '\f286';
            }            
        }
    }

    &.with_children.collapsed {
        > div > .categoryname {
            &:before {
                content: '\f282';
            }
        }
    }

    /* ======================= STYLE FOR COLLAPSIBLE CONTENT CONTAINER */

    .fcontainer {
        padding: 1.25rem 1rem;
    }

}