.o-mail-Chatter-top:has(.o-mail-Chatter-sendMessage.active) .o-mail-Composer-send {
    @extend .btn-danger
}

.o-mail-Form-chatter.o-aside {
    .mk_chatter_resize {
        top: 0;
        bottom: 0;
        width: 5px;
        height: 100%;
        cursor: col-resize;
        position: absolute;
        z-index: $o-mail-NavigableList-zIndex + 1;
        border-left: var(--ControlPanel-border-bottom, 1px solid $o-gray-300);
    }
}
