.header-top-bar-contacts__phone-link.link-box 
{
  display: inline-block;
  background: #2196f3;
  color: #fff;
  padding: 10px;
  border: none;
  border-radius: 6px;
  text-decoration: none;
  font-family: Tahoma;
  font-size: 18px;
  line-height: 1;
  font-weight: 100;
  cursor: pointer;
}