#gallery-container {
  max-width: 1000px;
  margin-left: auto;
  margin-right: auto;
  display: flex;
  gap: 16px;
  padding: 16px;
  align-items: flex-start;
}

.gallery-column {
  flex: 1;
  min-width: 0;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

/*カード*/
.gallery-item {
  break-inside: avoid;
  margin-bottom: 4px;
  background: transparent;
  overflow: hidden;
  transition: transform 0.2s ease;
  transform: translateY(-4px);
}

.gallery-item img {
  width: 100%;
  height: auto;
  display: block;
  border-radius: 12px;
}

.gallery-item .date-info {
  padding: 8px 12px;
  font-size: 0.8rem;
  color: #666;
}

#lightbox {
  display: none;
  position: fixed;
  z-index: 1000;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(0, 0, 0, 0.85);
  cursor: zoom-out;
  justify-content: center;
  align-items: center;
  opacity: 0;
  transition: opacity 0.3s ease;
}

#lightbox.active {
  display: flex;
  opacity: 1;
}

#lightbox img {
  max-width: 90%;
  max-height: 90%;
  box-shadow: 0 0 30px rgba(0, 0, 0, 0.5);

  transform: scale(0.9);
  transition: transform 0.3s ease;
}

#lightbox.active img {
  transform: scale(1);
}

        html {
  background-color: #dae7ee;
}