/* Ảnh chính */
#main-image {
  max-height: 450px;
  object-fit: cover;
  transition: all 0.3s ease;
}

/* Ảnh phụ (thumbnail) */
.thumb-img {
  width: 21%;
  height: 80px;
  object-fit: cover;
  margin: 5px;
  border: 2px solid transparent;
  border-radius: 8px;
  cursor: pointer;
  transition: transform 0.2s, border-color 0.3s;
}

.thumb-img:hover,
.thumb-img.active {
  /* -webkit-transform: scale3d(1, 1, 1);
  transform: scale3d(1, 1, 1);
  -webkit-filter: brightness(0.95);
  filter: brightness(0.95); */
  border-color: #2d3338;
  transform: scale(1.05);
}