.tox-editor-header, 
.tox-toolbar__group > button, 
.tox-tbtn {
    background-color: transparent !important;
}

.tox-editor-header{
    border-bottom: none !important;
}

.tox-toolbar__group:not(:first-child){
    border-left: 1px solid black !important;
}

.tox-toolbar__group > button, 
.tox-tbtn {
    cursor: pointer !important;
}

.tox .tox-listboxfield .tox-listbox--select, .tox .tox-collection--list .tox-collection__item--enabled{
    background-color: inherit !important;
}