@media screen and (max-width: 768px) {
  .submenu {
    display: block;
    text-align: center; }
    .submenu .search-box {
      margin: 15px 0; }
    .submenu .submenu-right {
      display: none; }
      .submenu .submenu-right .social-networks img {
        height: 20px;
        margin-left: 15px; } }