.gallery {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  grid-gap: 10px;
}

.gallery-item {
  width: 100%;
  height: 0;
  padding-bottom: 100%;
  position: relative;
}

.gallery-item img {
  position: absolute;
  width: 100%;
  height: 100%;
  object-fit: cover;
  border-radius: 5%;
  cursor: pointer;
}

.fullscreen-preview {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(0, 0, 0, 0.8);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 9999;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s;
}

.fullscreen-preview img {
  max-width: 90%;
  max-height: 90%;
}

.show-fullscreen {
  opacity: 1;
  pointer-events: auto;
}

.close-button {
  position: absolute;
  top: 10px;
  right: 10px;
  font-size: 24px;
  color: #fff;
  background-color: rgba(0, 0, 0, 0.5);
  z-index: 1;
  width: 40px;
  height: 40px;
  display: flex;
  justify-content: center;
  align-items: center;
  border: none;
  border-radius: 50%;
}

.nav-button {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  font-size: 24px;
  color: #fff;
  background-color: rgba(0, 0, 0, 0.5);
  cursor: pointer;
  z-index: 1;
  width: 40px;
  height: 40px;
  display: flex;
  justify-content: center;
  align-items: center;
  border: none;
  border-radius: 50%;
}

.left-button {
  left: 10px;
}

.right-button {
  right: 10px;
}

.subtitle {
  position: absolute;
  bottom: 10px;
  left: 50%;
  transform: translateX(-50%);
  color: #fff;
  font-size: 16px;
  text-align: center;
  background-color: rgba(0, 0, 0, 0.7);
  padding: 5px 10px;
  border-radius: 5px;
  display: none;
}

.show-fullscreen .subtitle {
  display: block;
}