div#share_item {
  margin: 5px auto;
  text-align: center;
}

div#share_item div.social_network {
  font-size: 12px;
  font-family: Sans-Serif;
  text-align: center;
  display: inline;
}

div#share_item div.social_network img {
  vertical-align: middle;
  margin: 0 5px;
}