.album-wrap {
  padding-top: 24px;
  padding-bottom: 24px;
  padding-left: clamp(24px, 8vw, 180px);
  padding-right: clamp(24px, 8vw, 180px);
}

.album-title {
  margin: 0 0 18px;
  font-size: 28px;
  color: #1f2937;
}

.album {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 16px;
}

.photo-card {
  background: #fff;
  border-radius: 12px;
  overflow: hidden;
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.12);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
  cursor: pointer;
}

.photo-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 28px rgba(0, 0, 0, 0.18);
}

.photo-card img {
  display: block;
  width: 100%;
  height: 170px;
  object-fit: cover;
}

.lightbox {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.82);
  display: none;
  align-items: center;
  justify-content: center;
  z-index: 9999;
  padding: 24px;
}

.lightbox.show {
  display: flex;
}

.lightbox img {
  max-width: 92vw;
  max-height: 92vh;
  border-radius: 10px;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.45);
  opacity: 1;
  transition: opacity 0.15s ease;
}

.lightbox.loading img {
  opacity: 0.35;
}

.lightbox.loading::after {
  content: "";
  width: 48px;
  height: 48px;
  border: 4px solid rgba(255, 255, 255, 0.35);
  border-top-color: #ffffff;
  border-radius: 50%;
  position: absolute;
  animation: pb-spin 0.7s linear infinite;
}

@keyframes pb-spin {
  to {
    transform: rotate(360deg);
  }
}

/* 保持導覽列固定置頂，不被相簿內容干擾 */
#top {
  top: 0;
}

/* 為固定導覽列預留空間，避免內容覆蓋到上方 */
#content {
  margin-top: 70px;
}