/* (A) GALLERY WRAPPER */
/* (A1) BIG SCREENS - 3 IMAGES PER ROW */
.gallery {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  grid-gap:5px;
  max-width: 1200px;
  margin: 0 auto; /* horizontal center */
}

/* (A2) SMALL SCREENS - 2 IMAGES PER ROW */
@media screen and (max-width: 640px) {
  .gallery { grid-template-columns: repeat(2, 1fr); }
}

/* (B) THUMBNAILS */
.gallery img {
  width: 100%;
  height: 200px;
  object-fit: cover; /* fill | contain | cover | scale-down */
  border:0 solid #333;
  cursor: pointer;
}

/* (C) FULLSCREEN IMAGE */
.gallery img.full {
  position: fixed;
  top: 50%; left: 50%; transform: translate(-50%, -50%);
  width: 60vw; height: 60vh; /* Adjust the size of the box here */
  object-fit: contain; /* fill | contain | cover | scale-down */
  border: 2px solid #ebebeb;
 background: rgba(21, 51, 51, 0.8);  /* Semi-transparent background */
  z-index: 9999;
}