.tagcloud a,
.wp-block-tag-cloud a {
    font-size: 20px !important;
    padding: 12px 24px !important;
    margin: 0 10px 10px 0 !important;
}
@media (max-width: 600px) {
    .tagcloud a,
    .wp-block-tag-cloud a {
        font-size: 16px !important;
        padding: 8px 16px !important;
    }
}