.collection #collection { display: block }
.collection #footer .filter { display: block }
#collection {
  display: none;
  text-align: center;
}
#collection .item {
  text-align: center;
  display: inline-block;
  max-width: 49vw;
}
#collection .item img {
  width: 49vw;
  height: 63vw;
}

.product #product { display: block }
.product #footer .back { display: block }
.product #footer .addtocart { display: block }
#product {
  display: none;
}

#gallery,
#gallery .slider,
#gallery .slider .item {
}

#gallery .slider .item {
  float: left;
  width: 10vw;
}
#gallery .slider .item img {
  max-width: 10vw;
}