@media only screen and (max-width: 600px) {
  .navbar-brand img{
      height: 90px;
      width: 90px;
  }
  }

  @media only screen and (max-width: 1100px) {
    .navbar-brand img{
        height: 90px;
        width: 90px;
    }
    }

    @media only screen and (max-width: 387px) {
        .navbar-brand img{
            height: 90px !important;
            width: 90px !important;
        }
        }