@media (max-width: 1279px) {
  .single_style_in-below.post_header_wrap {
    margin-bottom: 1.5em;
  }
}
@media (max-width: 767px) {
  .single_style_in-below.post_header_wrap {
    margin-bottom: 1em;
  }
}
@media (max-width: 479px) {
  /* Single post header */
}