.product-main-frame{
  border: 1px solid rgba(0,0,0,.10);
  border-radius: 14px;
  overflow: hidden;
  background: rgba(255,255,255,.72);
  box-shadow: 0 8px 24px rgba(0,0,0,.06);
}

.product-main-image{
  display: block;
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  background: linear-gradient(135deg, rgba(223,183,150,.55), rgba(180,140,220,.20));
}

.product-thumbs{
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 10px;
  margin-top: 12px;
}

.product-thumb{
  border: 1px solid rgba(0,0,0,.12);
  border-radius: 12px;
  padding: 0;
  overflow: hidden;
  background: #fff;
  cursor: pointer;
  box-shadow: 0 4px 12px rgba(0,0,0,.05);
  transition: transform .15s ease, border-color .15s ease, box-shadow .15s ease;
}

.product-thumb:hover{
  transform: translateY(-1px);
}

.product-thumb.is-active{
  border-color: rgba(0,0,0,.34);
  box-shadow: 0 0 0 2px rgba(0,0,0,.10);
}

.product-thumb:focus-visible{
  outline: 3px solid rgba(0,0,0,.32);
  outline-offset: 2px;
}

.product-thumb img{
  display: block;
  width: 100%;
  aspect-ratio: 1 / 1;
  object-fit: cover;
  background: linear-gradient(135deg, rgba(223,183,150,.55), rgba(180,140,220,.20));
}

@media (max-width: 640px){
  .product-thumbs{
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 8px;
  }
}