/*.container{
  width: 100%;
  max-width: 600px;
  margin left: auto;
  margin-right: auto;
}
*/
img{
  position: fixed;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
}

@media screen and (orientation: portrait) {
  img { max-width: 80%; }
}

@media screen and (orientation: landscape) {
  img { max-height: 80%; }
}