.main {
  margin-left: 8em;
  margin-top: -2em;
  overflow: hidden;
}

#gallery {
  height:96.5%;
  width:90.5%;
  background-color: black;
  position: absolute;
  text-align: center;
  overflow: hidden;
}

#img {
vertical-align:middle;
width: 100%;
height: 100%;
object-fit: contain;

}

#next_btn_box {
  position: absolute;
  right: 0;
  bottom: 0;
}

#counter_box {
  position: absolute;
  display: inline-block;
  bottom: 0;
  color: white;
  font-size: .8em;
}

#prev_btn_box {
  position: absolute;
  left: 0;
  bottom: 0;
}


@media screen and (max-aspect-ratio: 1/1) {


  #gallery {
    height:78%;
    width:91%;
    background-color: black;
    position: absolute;
    text-align: center;
    bottom: 0;
  }

  .main {
    margin-left: 0.1em;
    overflow: unset;
  }

}