@media (max-width: 767px) {
     h1, h2.wp-block-post-title, h2.wp-block-post-title a {
        font-size: 16px;
        line-height: 1.5;
    }

    h3, h4, h5, h6 {
        font-size: 14px;
        line-height: 1.5;
    }

    p {
        font-size: 14px;
        line-height: 1.5;
    }

    time {
        font-size: 12px;
    }

}