"Add on Settings > Custom CSS Styles:

.rn-invert-colors .navbar-default .navbar-toggle {
    position: absolute;
    right: 0px;
}
@media screen and (max-width: 479px) {
  .navbar-brand img {
  max-width: 90px;
  }
}

@media screen and (max-width: 767px) {
.hero-carousel .slide {
  min-height: 600px;
}
.hero-carousel .carousel-caption {
  top: auto;
  bottom: 38%;
}

}
"