.navbar-brand > img {
  width: 250px;
}
@media screen and (max-width: 420px) {
  .navbar-brand > img {
    width: 200px;
  }
}
@media screen and (max-width: 375px) {
  .navbar-brand > img {
    width: 180px;
  }
}
@media screen and (max-width: 325px) {
  .navbar-brand > img {
    width: 155px;
  }
}