.bi-gallery-grid {
  display: grid;
  gap: 12px;
}

.bi-gallery-grid img {
  width: 100%;
  height: auto;
  display: block;
}

.bi-gallery-item {
  margin: 0;
}

.bi-gallery-caption {
  font-size: 0.9em;
  line-height: 1.4;
  margin-top: 6px;
  opacity: 0.85;
}

/* columns */
.bi-cols-1 { grid-template-columns: repeat(1, minmax(0, 1fr)); }
.bi-cols-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.bi-cols-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.bi-cols-4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }
.bi-cols-5 { grid-template-columns: repeat(5, minmax(0, 1fr)); }
.bi-cols-6 { grid-template-columns: repeat(6, minmax(0, 1fr)); }
.bi-cols-7 { grid-template-columns: repeat(7, minmax(0, 1fr)); }
.bi-cols-8 { grid-template-columns: repeat(8, minmax(0, 1fr)); }

/* mobile */
@media (max-width: 767px) {
  .bi-cols-4, .bi-cols-5, .bi-cols-6, .bi-cols-7, .bi-cols-8 {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .bi-cols-3 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}