.t-feed__post-popup__close-wrapper .t-popup__close:before {
    right: -65px;
}
.t-feed__post-popup__close-wrapper .t-popup__close:after {
    content: 'Назад';
    position: absolute;
    top: 0;
    left: 100%;
    color: #000;
    font-family: 'Montserrat', Arial, sans-serif;
    font-weight: 400;
    font-size: 14px;
    line-height: 1.5;
}

.t-feed__post-popup__close-text {
    font-size: 18px;
}