/* Default - Large devices (≥1200px) */
img.responsive-img {
  width: 800px;
  height: auto;
}
 
/* Medium devices (992px - 1199px) */
@media screen and (max-width: 1199px) and (min-width: 992px) {
  img.responsive-img {
    width: 600px;
  }
}
 
/* Small devices (768px - 991px) */
@media screen and (max-width: 991px) and (min-width: 768px) {
  img.responsive-img {
    width: 400px;
  }
}
 
/* Mini devices (<768px) */
@media screen and (max-width: 767px) {
  img.responsive-img {
    width: 100%;
    max-width: 300px;
  }
}