#app .tlk-lectures__taskcheck-button .tlk-btn_white-black, #app .tlk-lectures__taskcheck-button .tlk-btn_white-black {
    color: #ffffff !important;
    font-size: 14px;
}

.tlk-btn_white-black, .tlk-btn_white-black {
    color: #000;
    border: 2px solid #ffffff !important;
}