/* Work Grid Layout */
.work-grid {
  display: grid;
  grid-template-columns: repeat(var(--grid-columns-desktop), 1fr);
  gap: var(--grid-gap);
  width: 100%;
}

/* 网格项 */
.work-item {
  position: relative;
  overflow: hidden;
  border-radius: var(--border-radius-md);
  cursor: pointer;
  background-color: var(--color-background-secondary);
  aspect-ratio: 3 / 4;
}

.work-item::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(
    to bottom,
    transparent 0%,
    transparent 50%,
    rgba(0, 0, 0, 0.7) 100%
  );
  opacity: 0;
  transition: opacity var(--duration-normal) var(--easing-default);
  z-index: 1;
}

.work-item:hover::before {
  opacity: 1;
}

/* 网格图片 */
.work-image {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--duration-normal) var(--easing-default);
}

.work-item:hover .work-image {
  transform: scale(1.05);
}

/* 懒加载状态 */
.work-image:not(.loaded) {
  opacity: 0;
}

.work-image.loaded {
  animation: fadeIn var(--duration-normal) var(--easing-default) forwards;
}

/* 图片加载占位 */
.work-image-placeholder {
  position: absolute;
  inset: 0;
  background: linear-gradient(
    135deg,
    var(--color-background-secondary) 0%,
    var(--color-border) 50%,
    var(--color-background-secondary) 100%
  );
  background-size: 200% 200%;
  animation: shimmer 2s ease-in-out infinite;
}

@keyframes shimmer {
  0% {
    background-position: 0% 0%;
  }
  50% {
    background-position: 100% 100%;
  }
  100% {
    background-position: 0% 0%;
  }
}

/* 作品信息覆盖层 */
.work-info {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  padding: var(--spacing-md);
  color: white;
  z-index: 2;
  opacity: 0;
  transform: translateY(10px);
  transition: all var(--duration-normal) var(--easing-default);
}

.work-item:hover .work-info {
  opacity: 1;
  transform: translateY(0);
}

.work-title {
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-semibold);
  margin-bottom: var(--spacing-xs);
}

.work-meta {
  font-size: var(--font-size-sm);
  opacity: 0.9;
}

/* 平板布局 */
@media (max-width: 1024px) and (min-width: 769px) {
  .work-grid {
    grid-template-columns: repeat(var(--grid-columns-tablet), 1fr);
  }
}

/* 移动端布局 */
@media (max-width: 768px) {
  .work-grid {
    grid-template-columns: repeat(var(--grid-columns-mobile), 1fr);
    gap: var(--grid-gap-mobile);
  }

  /* 移动端简化hover效果 */
  .work-item::before {
    display: none;
  }

  .work-item:hover .work-image {
    transform: none;
  }

  .work-info {
    display: none; /* 移动端不显示悬停信息，改为在灯箱中显示 */
  }
}

/* 触摸设备优化 */
@media (hover: none) and (pointer: coarse) {
  .work-item::before {
    display: none;
  }

  .work-item:hover .work-image {
    transform: none;
  }

  .work-info {
    display: none;
  }
}

/* 系列卡片样式 */
.series-card {
  /* 继承 work-item 的基础样式 */
}

/* 系列徽章（显示作品数量） */
.series-badge {
  position: absolute;
  top: var(--spacing-sm);
  right: var(--spacing-sm);
  background-color: rgba(0, 0, 0, 0.7);
  color: white;
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-semibold);
  padding: var(--spacing-xs) var(--spacing-sm);
  border-radius: var(--border-radius-sm);
  z-index: 3;
  backdrop-filter: blur(8px);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
}

/* 系列信息样式 */
.series-info {
  /* 继承 work-info 的基础样式 */
}

.series-count {
  display: inline-block;
  margin-right: var(--spacing-sm);
}

.series-year {
  opacity: 0.8;
}

/* 移动端系列徽章 */
@media (max-width: 768px) {
  .series-badge {
    font-size: var(--font-size-xs);
    padding: 4px 8px;
  }
}