@media (prefers-color-scheme: light) {

}

@media (prefers-color-scheme: dark) {

}

article img.small {
  max-width: 640px;
}

article img.medium {
  max-width: 768px;
}

article img.mobile {
  max-width: 375px;
}

@media only screen and (max-width: 768px) {
  article img {
    width: 100% !important;
  }
}