/* ============================================
 * 学习资源页面样式
 * ============================================
 */
.resources-toolbar {
  display: flex;
  gap: 12px;
  margin-bottom: 20px;
  flex-wrap: wrap;
  align-items: center;
}

.search-input-wrap {
  flex: 1;
  min-width: 260px;
  position: relative;
}

.search-input {
  width: 100%;
  padding: 12px 18px 12px 48px;
  border: 1.5px solid var(--border);
  border-radius: var(--radius-md);
  font-family: inherit;
  font-size: 0.938rem;
  background: var(--surface);
  transition: border-color 0.2s;
}

.search-input:focus {
  border-color: var(--sage);
  outline: none;
}

.search-input-wrap svg {
  position: absolute;
  left: 15px;
  top: 50%;
  transform: translateY(-50%);
  width: 18px;
  height: 18px;
  color: var(--text-muted);
}

.crawl-btn {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 13px 22px;
  background: var(--sage);
  color: #fff;
  border: none;
  border-radius: var(--radius-md);
  font-weight: 600;
  cursor: pointer;
  transition: background-color 0.2s;
}

.crawl-btn:hover {
  background: var(--forest-mid);
}

.crawl-btn.loading {
  opacity: 0.6;
  cursor: not-allowed;
}

.crawl-spinner {
  width: 16px;
  height: 16px;
  border: 2px solid rgba(255,255,255,0.3);
  border-top-color: #fff;
  border-radius: 50%;
  animation: spin 0.65s linear infinite;
  display: none;
}

.crawl-btn.loading .crawl-spinner {
  display: block;
}

.crawl-status {
  display: none;
  align-items: center;
  gap: 10px;
  padding: 12px 20px;
  border-radius: var(--radius-md);
  margin-top: 16px;
  margin-bottom: 16px;
}

.crawl-status.show {
  display: flex;
}

.crawl-status.success {
  background: rgba(58,140,92,0.08);
  color: #3a8c5c;
  border: 1px solid rgba(58,140,92,0.2);
}

.filter-section {
  margin-bottom: 20px;
  padding: 16px 20px;
  background: var(--surface);
  border-radius: var(--radius-md);
  border: 1px solid var(--border-light);
}

.filter-row {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
}

.filter-row + .filter-row {
  margin-top: 12px;
}

.filter-label {
  font-size: 0.8rem;
  color: var(--text-muted);
  font-weight: 500;
  min-width: 40px;
}

.filter-chips {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.filter-chip {
  padding: 5px 14px;
  border-radius: 16px;
  border: 1px solid var(--border);
  background: transparent;
  font-size: 0.8rem;
  color: var(--text-secondary);
  cursor: pointer;
  transition: all 0.15s;
}

.filter-chip:hover {
  border-color: var(--sage);
  color: var(--sage);
}

.filter-chip.active {
  background: var(--sage);
  border-color: var(--sage);
  color: #fff;
}

.resources-meta {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-bottom: 16px;
}

.resources-meta strong {
  color: var(--forest-deep);
  font-weight: 600;
}

.resources-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
  gap: 20px;
}

.resource-item {
  background: var(--surface);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  padding: 24px;
  text-decoration: none;
  color: inherit;
  display: block;
  transition: border-color 0.2s, box-shadow 0.2s, transform 0.2s;
  position: relative;
  overflow: hidden;
  cursor: pointer;
}

.resource-item::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--sage);
  transform: scaleX(0);
  transition: transform 0.2s;
  transform-origin: left;
}

.resource-item:hover {
  border-color: var(--sage);
  box-shadow: 0 4px 16px rgba(26,47,29,0.09);
  transform: translateY(-3px);
}

.resource-item:hover::before {
  transform: scaleX(1);
}

.resource-source {
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--sage);
  margin-bottom: 12px;
}

.resource-title {
  font-family: var(--font-serif, 'Noto Serif SC', serif);
  font-size: 1.05rem;
  font-weight: 600;
  margin-bottom: 8px;
  line-height: 1.5;
}

.resource-excerpt {
  font-size: 0.875rem;
  color: var(--text-secondary);
  line-height: 1.65;
}

.resource-meta {
  display: flex;
  gap: 12px;
  margin-top: 16px;
  align-items: center;
  flex-wrap: wrap;
}

.resource-tag {
  font-size: 0.68rem;
  font-weight: 500;
  padding: 3px 10px;
  border-radius: 12px;
  background: rgba(90,125,92,0.08);
  color: var(--sage);
}

.resource-new {
  font-size: 0.68rem;
  font-weight: 600;
  color: var(--marigold);
}

.resource-link-icon {
  position: absolute;
  top: 20px;
  right: 20px;
  font-size: 0.875rem;
  opacity: 0.3;
}

/* 资源卡片激活状态 */
.resource-item--active {
  border-color: var(--sage);
  box-shadow: 0 4px 16px rgba(26,47,29,0.12);
  background: var(--surface-secondary);
}

/* 资源详情面板 */
.resource-detail-panel {
  grid-column: 1 / -1;
  background: var(--surface);
  border: 1.5px solid var(--sage);
  border-radius: var(--radius-md);
  padding: 28px 32px;
  margin-top: 4px;
  margin-bottom: 16px;
  position: relative;
  animation: resourceDetailIn 0.25s ease-out;
}

@keyframes resourceDetailIn {
  from { opacity: 0; transform: translateY(-8px); }
  to { opacity: 1; transform: translateY(0); }
}

.resource-detail-close {
  position: absolute;
  top: 16px;
  right: 20px;
  width: 32px;
  height: 32px;
  border: none;
  background: transparent;
  font-size: 1.5rem;
  color: var(--text-muted);
  cursor: pointer;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background 0.15s, color 0.15s;
}

.resource-detail-close:hover {
  background: var(--border-light);
  color: var(--text-primary);
}

.resource-detail-header {
  margin-bottom: 16px;
  padding-right: 40px;
}

.resource-detail-source {
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--sage);
}

.resource-detail-title {
  font-family: var(--font-serif, 'Noto Serif SC', serif);
  font-size: 1.2rem;
  font-weight: 700;
  margin: 6px 0 0;
  line-height: 1.45;
}

.resource-detail-body {
  margin-bottom: 20px;
}

.resource-detail-excerpt {
  font-size: 0.95rem;
  color: var(--text-primary);
  line-height: 1.75;
  margin: 0;
}

.resource-detail-desc {
  font-size: 0.82rem;
  color: var(--text-muted);
  margin: 12px 0 0;
}

.resource-detail-footer {
  display: flex;
  gap: 12px;
  align-items: center;
  flex-wrap: wrap;
  padding-top: 16px;
  border-top: 1px solid var(--border-light);
}

.resource-detail-link {
  margin-left: auto;
  padding: 8px 18px;
  background: var(--sage);
  color: #fff;
  border-radius: var(--radius-sm);
  text-decoration: none;
  font-size: 0.85rem;
  font-weight: 600;
  transition: background 0.2s;
}

.resource-detail-link:hover {
  background: var(--forest-mid);
}

@media (max-width: 768px) {
  .resources-grid {
    grid-template-columns: 1fr;
  }
  
  .filter-section {
    padding: 12px;
  }
  
  .resource-detail-panel {
    padding: 20px;
  }
}