.login_info{
  text-align: center; padding: 40px 20px;  
}
@media screen and (max-width: 768px) {
  .header-welcome {
      text-align: center;
      margin: 40px 0 40px 0;
      font-size: 18px;
      color: var(--unit-color);
      font-weight: 500;
      position: static;
  }
  .header-welcome a {
    text-align: center;
    margin: 40px 0 40px 0;
    font-size: 18px;
    color: var(--unit-color);
    font-weight: 500;
    position: static;
  }
  a.logout {
    display: none;
  }
}