/* ========== 相册列表页样式 ========== */
.album-desc {
  color: var(--sub);
  margin-bottom: 24px;
  font-size: 14px;
}

.album-set-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 20px;
}

.album-set-card {
  text-decoration: none;
  color: inherit;
  border-radius: var(--radius-md);
  overflow: hidden;
  background: var(--card);
  border: 1px solid var(--border);
  transition: all var(--transition-normal);
}

.album-set-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-glow);
  border-color: transparent;
}

.album-set-cover {
  position: relative;
  height: 200px;
  overflow: hidden;
}

.album-set-cover img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition-slow);
}

.album-set-card:hover .album-set-cover img {
  transform: scale(1.08);
}

.album-set-mask {
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(0,0,0,0.5), transparent);
  display: flex;
  align-items: flex-end;
  justify-content: flex-end;
  padding: 12px;
}

.album-count {
  color: #fff;
  font-size: 13px;
  padding: 4px 10px;
  background: rgba(255,255,255,0.2);
  border-radius: 20px;
  backdrop-filter: blur(4px);
}

.album-set-info {
  padding: 16px;
}

.album-set-info h3 {
  font-size: 17px;
  margin-bottom: 4px;
}

.album-set-info p {
  font-size: 13px;
  color: var(--sub);
}

/* ========== 相册详情页通用 ========== */
.album-header {
  margin-bottom: 20px;
}

.back-album {
  display: inline-block;
  margin-bottom: 16px;
  color: var(--sub);
  text-decoration: none;
  font-size: 14px;
  transition: all var(--transition-fast);
}

.back-album:hover {
  color: var(--accent);
  transform: translateX(-3px);
}

.album-detail-title {
  margin-bottom: 0;
}

/* ========== 筛选标签增强 + 主题色 ========== */
.album-filter {
  display: flex;
  gap: 12px;
  margin-bottom: 24px;
  flex-wrap: wrap;
}

.filter-tag {
  padding: 6px 14px;
  border: 1px solid var(--border);
  border-radius: 20px;
  cursor: pointer;
  font-size: 14px;
  transition: all var(--transition-fast);
  display: flex;
  align-items: center;
  gap: 6px;
}

.tag-count {
  font-size: 12px;
  opacity: 0.7;
}

.filter-tag.active {
  background: var(--gradient-primary);
  color: #fff;
  border-color: transparent;
  box-shadow: var(--shadow-soft);
}

.filter-tag:hover {
  transform: translateY(-2px);
}

/* 分类主题色变量 */
body.theme-view { --gradient-primary: linear-gradient(135deg, #a1c4fd 0%, #c2e9fb 100%); }
body.theme-portrait { --gradient-primary: linear-gradient(135deg, #ffb6c1 0%, #ffd1dc 100%); }
body.theme-film { --gradient-primary: linear-gradient(135deg, #ffecd2 0%, #fcb69f 100%); }
body.theme-city { --gradient-primary: linear-gradient(135deg, #667eea 0%, #764ba2 100%); }

/* ========== 空状态 ========== */
.album-empty {
  display: none;
  text-align: center;
  padding: 60px 20px;
  color: var(--sub);
}

.album-empty.show {
  display: block;
}

.empty-icon {
  font-size: 48px;
  margin-bottom: 16px;
  opacity: 0.5;
}

/* ========== 瀑布流 + 加载体验 ========== */
.album-wrap {
  columns: 3;
  gap: 12px;
}

.album-item {
  width: 100%;
  margin-bottom: 12px;
  border-radius: 8px;
  display: block;
  cursor: zoom-in;
  transition: all var(--transition-normal);
  break-inside: avoid;
  position: relative;
  overflow: hidden;
  /* 骨架屏 + 呼吸动效 */
  background: linear-gradient(90deg, #eee 25%, #f5f5f5 50%, #eee 75%);
  background-size: 200% 100%;
  animation: skeleton-loading 1.5s infinite;
}

body.dark .album-item {
  background: linear-gradient(90deg, #333 25%, #3a3a3a 50%, #333 75%);
  background-size: 200% 100%;
}

.album-item.loaded {
  animation: none;
  background: none;
}

.album-item:hover {
  opacity: 0.9;
  transform: scale(1.02);
  box-shadow: var(--shadow-glow);
}

/* 图片容器：让悬浮文案层相对自身定位，避免撑满整个视口遮挡页面 */
.album-item-wrapper {
  position: relative;
}

/* 悬浮文案层 */
.album-item-hover {
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: linear-gradient(to top, rgba(0,0,0,0.7), transparent 60%);
  color: #fff;
  padding: 16px;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  opacity: 0;
  transition: opacity var(--transition-normal);
}

.album-item-wrapper:hover .album-item-hover {
  opacity: 1;
}

.album-item-hover .item-title {
  font-size: 15px;
  font-weight: 500;
  margin-bottom: 2px;
}

.album-item-hover .item-location {
  font-size: 12px;
  opacity: 0.8;
}

/* 错落入场动画基础 */
.album-item {
  opacity: 0;
  transform: translateY(20px);
}

.album-item.animate-in {
  opacity: 1;
  transform: translateY(0);
  transition: all 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

/* 加载更多 */
.load-more-tip {
  text-align: center;
  padding: 30px;
  color: var(--sub);
  font-size: 14px;
  display: none;
  align-items: center;
  justify-content: center;
  gap: 10px;
}

.load-more-tip.show {
  display: flex;
}

.loading-spinner {
  width: 16px;
  height: 16px;
  border: 2px solid var(--border);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

/* ========== 灯箱全功能增强 ========== */
.lightbox-index {
  position: absolute;
  top: 24px;
  left: 30px;
  color: #fff;
  font-size: 14px;
  z-index: 10;
  padding: 4px 12px;
  background: rgba(0,0,0,0.3);
  border-radius: 20px;
  backdrop-filter: blur(4px);
}

.lightbox-loading {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 5;
}

.lightbox-loading .loading-spinner {
  width: 32px;
  height: 32px;
  border-width: 3px;
  border-top-color: #fff;
}

.lightbox-img-wrap {
  position: relative;
  z-index: 6;
  max-width: 90%;
  max-height: 70vh;
  overflow: hidden;
  border-radius: var(--radius-md);
  /* 二次元发光效果 */
  box-shadow: 0 0 40px rgba(255, 182, 193, 0.3);
}

.lightbox-img {
  max-width: 100%;
  max-height: 70vh;
  display: block;
  transition: transform 0.3s ease;
  cursor: zoom-in;
}

.lightbox-img.zoomed {
  cursor: zoom-out;
  transform: scale(1.8);
}

.lightbox-bottom {
  margin-top: 16px;
  color: #fff;
  text-align: center;
  max-width: 80%;
}

.lightbox-info {
  margin-bottom: 12px;
}

.lightbox-title {
  font-size: 18px;
  margin-bottom: 4px;
}

.lightbox-location {
  font-size: 13px;
  opacity: 0.8;
  margin-bottom: 6px;
}

.lightbox-desc {
  font-size: 14px;
  opacity: 0.9;
  line-height: 1.6;
}

.lightbox-exif {
  font-size: 13px;
  opacity: 0.85;
  margin-bottom: 12px;
  padding: 8px 16px;
  background: rgba(255,255,255,0.1);
  border-radius: 8px;
  backdrop-filter: blur(10px);
  border: 1px solid rgba(255,255,255,0.15);
  display: inline-block;
  line-height: 1.7;
  border-left: 3px solid transparent;
  border-image: var(--gradient-primary) 1;
}

.lightbox-actions {
  display: flex;
  gap: 12px;
  justify-content: center;
  align-items: center;
  flex-wrap: wrap;
}

.lightbox-btn {
  padding: 6px 14px;
  background: rgba(255,255,255,0.15);
  color: #fff;
  border: 1px solid rgba(255,255,255,0.3);
  border-radius: 20px;
  cursor: pointer;
  font-size: 13px;
  transition: all var(--transition-fast);
  backdrop-filter: blur(4px);
}

.lightbox-btn:hover {
  background: rgba(255,255,255,0.25);
  transform: translateY(-2px);
}

.lightbox-btn.liked {
  color: #ff6b9d;
  border-color: #ff6b9d;
  background: rgba(255, 107, 157, 0.2);
}

.lightbox-download {
  padding: 6px 14px;
  border: 1px solid rgba(255,255,255,0.3);
  color: #fff;
  text-decoration: none;
  border-radius: 20px;
  font-size: 13px;
  transition: all var(--transition-fast);
  backdrop-filter: blur(4px);
}

.lightbox-download:hover {
  background: rgba(255,255,255,0.2);
  transform: translateY(-2px);
}

/* ========== 动画关键帧 ========== */
@keyframes skeleton-loading {
  0% { background-position: 200% 0; }
  100% { background-position: -200% 0; }
}

@keyframes spin {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

/* ========== 响应式 ========== */
@media (max-width:768px) {
  .album-wrap { columns: 2; }
  .album-set-grid { grid-template-columns: repeat(2, 1fr); }
  .lightbox-img-wrap { max-width: 95%; }
  .lightbox-bottom { max-width: 95%; }
  .lightbox-actions { gap: 8px; }
}