@media screen and (max-width: 575px) {
  ul.headbar_overlay_menu li .sub-menu {
    display: none;
  }
  .socialmedia_icons a + a {
    margin-left: 0;
  }
  .socialmedia_icons a {
    display: inline-block;
    margin-left: 0;
    margin-right: 15px;
    margin-bottom: 15px;
  }
  .socialmedia_icons i {
    font-size: 2.3rem;
  }
}