/* ============================================
   resources.css - 资源库样式
   ============================================ */

.main-content {
  padding: var(--space-xl) 0 var(--space-3xl);
  background: var(--color-bg);
  min-height: 80vh;
}

.resources-layout {
  display: block;
}

/* 侧边筛选 */
.filter-sidebar {
  background: var(--color-white);
  border-radius: var(--radius-lg);
  padding: var(--space-lg);
  height: fit-content;
  position: sticky;
  top: calc(var(--nav-height) + 20px);
  box-shadow: var(--shadow-sm);
}

.filter-section {
  margin-bottom: var(--space-xl);
  padding-bottom: var(--space-lg);
  border-bottom: 1px solid var(--color-border-light);
}

.filter-section:last-child {
  border-bottom: none;
  margin-bottom: 0;
  padding-bottom: 0;
}

.filter-section h3 {
  font-size: var(--font-size-base);
  font-weight: 600;
  color: var(--color-dark);
  margin-bottom: var(--space-md);
}

.filter-list {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.filter-list li a {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  padding: 8px 12px;
  border-radius: var(--radius-md);
  font-size: var(--font-size-sm);
  color: var(--color-text);
  transition: all var(--transition-fast);
}

.filter-list li a:hover {
  background: rgba(124, 58, 237, 0.05);
  color: var(--color-primary);
}

.filter-list li.active a {
  background: var(--gradient-primary);
  color: white;
}

.filter-list li a i {
  width: 16px;
  text-align: center;
}

.filter-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.filter-tags li {
  display: inline-flex;
}

/* 主内容区 */
.resources-main {
  min-width: 0;
}

.search-bar {
  background: var(--color-white);
  border-radius: var(--radius-lg);
  padding: var(--space-lg);
  margin-bottom: var(--space-lg);
  box-shadow: var(--shadow-sm);
}

.search-input-wrap {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius-full);
  padding: 4px 4px 4px 16px;
  margin-bottom: var(--space-md);
  transition: border-color var(--transition-fast);
}

.search-input-wrap:focus-within {
  border-color: var(--color-primary-light);
  box-shadow: 0 0 0 3px rgba(124, 58, 237, 0.1);
}

.search-input-wrap i {
  color: var(--color-text-lighter);
}

.search-input {
  flex: 1;
  border: none;
  background: transparent;
  padding: 8px;
  font-size: var(--font-size-base);
}

.search-tabs {
  display: flex;
  gap: var(--space-sm);
  margin-bottom: var(--space-md);
  border-bottom: 1px solid var(--color-border-light);
}

.search-tabs .tab-item {
  padding: 6px 14px;
  margin-bottom: 0;
}

.search-sort {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  font-size: var(--font-size-sm);
  color: var(--color-text-light);
}

.sort-select {
  padding: 6px 12px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-white);
  font-size: var(--font-size-sm);
  color: var(--color-text);
  cursor: pointer;
}

.resources-summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--space-lg);
  font-size: var(--font-size-sm);
  color: var(--color-text-light);
}

.resources-summary strong {
  color: var(--color-primary);
  font-weight: 700;
}

.summary-tags {
  display: flex;
  gap: var(--space-sm);
}

/* 素材卡片 */
.materials-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-md);
  margin-bottom: var(--space-2xl);
}

.material-card {
  background: var(--color-white);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: all var(--transition-normal);
  border: 1px solid var(--color-border-light);
}

.material-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

.material-thumb {
  position: relative;
  height: 180px;
  overflow: hidden;
  cursor: pointer;
}

.material-thumb .thumb-placeholder {
  width: 100%;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 48px;
  color: rgba(255,255,255,0.85);
}

.material-thumb .tag {
  position: absolute;
  top: 10px;
  left: 10px;
  z-index: 2;
}

.material-overlay {
  position: absolute;
  inset: 0;
  background: rgba(0,0,0,0.5);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
  opacity: 0;
  transition: opacity var(--transition-fast);
}

.material-card:hover .material-overlay {
  opacity: 1;
}

.btn-white {
  background: var(--color-white);
  color: var(--color-text);
}

.btn-white:hover {
  background: var(--color-bg);
}

.material-body {
  padding: var(--space-md);
}

.material-body h4 {
  font-size: var(--font-size-base);
  font-weight: 600;
  color: var(--color-dark);
  margin-bottom: var(--space-sm);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.material-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 4px;
  margin-bottom: var(--space-sm);
}

.material-tags span {
  font-size: var(--font-size-xs);
  padding: 2px 6px;
  background: var(--color-bg);
  color: var(--color-text-light);
  border-radius: var(--radius-sm);
}

.material-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.meta-right {
  display: flex;
  gap: var(--space-sm);
  font-size: var(--font-size-xs);
  color: var(--color-text-lighter);
}

/* 分页 */
.pagination {
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: var(--color-white);
  padding: var(--space-md) var(--space-lg);
  border-radius: var(--radius-lg);
  flex-wrap: wrap;
  gap: var(--space-md);
}

.page-info {
  font-size: var(--font-size-sm);
  color: var(--color-text-light);
}

.page-numbers {
  display: flex;
  gap: 4px;
}

.page-num {
  min-width: 32px;
  height: 32px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0 8px;
  border-radius: var(--radius-md);
  cursor: pointer;
  font-size: var(--font-size-sm);
  color: var(--color-text);
  transition: all var(--transition-fast);
}

.page-num:hover {
  background: rgba(124, 58, 237, 0.08);
  color: var(--color-primary);
}

.page-num.active {
  background: var(--gradient-primary);
  color: white;
  font-weight: 600;
}

.page-ellipsis {
  padding: 0 8px;
  color: var(--color-text-lighter);
}

/* 响应式 */
@media (max-width: 1200px) {
  .materials-grid { grid-template-columns: repeat(3, 1fr); }
}

@media (max-width: 1024px) {
  .resources-layout { grid-template-columns: 1fr; }
  .filter-sidebar { position: static; }
  .materials-grid { grid-template-columns: repeat(3, 1fr); }
}

@media (max-width: 768px) {
  .materials-grid { grid-template-columns: repeat(2, 1fr); }
  .page-numbers { display: none; }
}

@media (max-width: 480px) {
  .materials-grid { grid-template-columns: 1fr; }
}