.item-detail-page{
  display:grid;
  grid-template-columns:minmax(0, 1.05fr) minmax(0, .95fr);
  gap:40px;
}

.item-detail-page__main img{
  width:100%;
  border-radius:20px;
  display:block;
}

.item-detail-page__category{
  margin:0 0 10px;
  font-size:12px;
  letter-spacing:.12em;
  text-transform:uppercase;
  opacity:.65;
}

.item-detail-page__title{
  margin:0 0 18px;
  font-size:34px;
  line-height:1.2;
}

.item-detail-page__content{
  line-height:1.9;
}

.item-detail-page__gallery{
  grid-column:1 / -1;
  display:grid;
  grid-template-columns:repeat(3, minmax(0, 1fr));
  gap:18px;
  margin-top:12px;
}

.item-detail-page__gallery img{
  width:100%;
  border-radius:16px;
  display:block;
}

@media (max-width: 900px){
  .item-detail-page{
    grid-template-columns:1fr;
    gap:24px;
  }

  .item-detail-page__gallery{
    grid-template-columns:repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 640px){
  .item-detail-page__title{
    font-size:28px;
  }

  .item-detail-page__gallery{
    grid-template-columns:1fr;
  }
}

.item-detail-page__buy{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  margin-top:24px;
  padding:14px 22px;
  background:#111;
  color:#fff;
  text-decoration:none;
  border-radius:999px;
  font-size:14px;
  letter-spacing:.08em;
  transition:.2s ease;
}

.item-detail-page__buy:hover{
  opacity:.85;
}