.upload-zone {
  border-style: dashed !important;
  transition: background .2s, border-color .2s;
  cursor: pointer;
}
.upload-zone:hover {
  background: #f0f7ff;
  border-color: #0d6efd !important;
}

.photo-card .delete-btn {
  opacity: 0;
  transition: opacity .2s;
}
.photo-card:hover .delete-btn {
  opacity: 1;
}

.gallery-thumb {
  transition: transform .2s, box-shadow .2s;
}
.gallery-thumb:hover {
  transform: scale(1.04);
  box-shadow: 0 4px 16px rgba(0,0,0,.2);
}

#slideshowContainer:fullscreen {
  border-radius: 0;
  min-height: 100vh !important;
}
#slideshowContainer:fullscreen #slideshowImg {
  max-height: 100vh;
}