/* ============================================================================
 * EduToolbox · components.css
 * 职责：工具网格、外链/自研工具卡片、徽标、空状态、精选滚动轨道、
 *       分类区块、分类入口卡片、文章卡片、工具详情
 * 依赖：base.css
 * ========================================================================== */

/* ---------------------------------------------------------------------------
 * 1. 工具网格
 * ------------------------------------------------------------------------- */
.tool-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(258px, 1fr));
  gap: 18px;
}

.cat-block-grid { margin-top: 18px; }

/* ---------------------------------------------------------------------------
 * 2. 外链工具卡片
 * ------------------------------------------------------------------------- */
.tool-card {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: 20px;
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--r);
  box-shadow: var(--shadow-sm);
  transition: transform var(--t) var(--ease),
              box-shadow var(--t) var(--ease),
              border-color var(--t) var(--ease);
  overflow: hidden;
}

.tool-card::before {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 3px;
  background: var(--primary-grad);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--t) var(--ease);
}

.tool-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: var(--primary-soft-2);
}

.tool-card:hover::before { transform: scaleX(1); }

.tool-title-row {
  display: flex;
  align-items: center;
  gap: 10px;
}

.tool-name-icon {
  display: grid;
  place-items: center;
  width: 40px;
  height: 40px;
  font-size: 20px;
  flex-shrink: 0;
  background: var(--primary-soft);
  border-radius: 11px;
  overflow: hidden;
}

.tool-favicon {
  width: 24px;
  height: 24px;
  object-fit: contain;
}

.tool-name {
  flex: 1;
  min-width: 0;
  font-size: 16px;
  font-weight: 700;
  color: var(--text-1);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.tool-ext {
  font-size: 14px;
  color: var(--text-3);
  transition: transform var(--t-fast) var(--ease), color var(--t-fast) var(--ease);
}

.tool-card:hover .tool-ext {
  color: var(--primary);
  transform: translate(2px, -2px);
}

.tool-desc {
  flex: 1;
  font-size: 13.5px;
  line-height: 1.65;
  color: var(--text-2);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.tool-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: 2px;
}

.tool-tags .tag {
  background: var(--card-bg-2);
  color: var(--text-3);
}

/* ---------------------------------------------------------------------------
 * 3. 精选推荐：无缝双轨滚动
 * ------------------------------------------------------------------------- */
.featured-section {
  padding: 26px 32px 22px;
  margin: 8px 0 20px;
  background: linear-gradient(180deg, #FFF8E1 0%, #FFFBF0 100%);
  border-radius: var(--r-lg);
}

.featured-title {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 20px;
  margin-bottom: 16px;
}

.featured-star { font-size: 22px; }

.featured-grid {
  display: block;
  overflow: hidden; /* 轨道在内部平移，外框不出现滚动条 */
  mask-image: linear-gradient(90deg, transparent, #000 4%, #000 96%, transparent);
  -webkit-mask-image: linear-gradient(90deg, transparent, #000 4%, #000 96%, transparent);
}

.featured-grid .tool-card {
  width: 288px;
  flex: 0 0 288px;
  margin-right: 18px;
}

.marquee-track {
  display: flex;
  width: max-content;
}

.marquee-track-a { animation: marquee-left 46s linear infinite; }
.marquee-track-b { display: none; } /* 双轨备用：当前仅启用一条 */

.featured-grid:hover .marquee-track-a { animation-play-state: paused; }

@keyframes marquee-left {
  from { transform: translateX(0); }
  to   { transform: translateX(-50%); }
}

/* ---------------------------------------------------------------------------
 * 4. 首页分类独立区块
 * ------------------------------------------------------------------------- */
.category-sections {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-top: 18px;
}

.cat-block {
  padding: 4px 0 8px;
  background: transparent;
  border: none;
  border-radius: 0;
  box-shadow: none;
}

.cat-block-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.cat-block-head h3 {
  font-size: 18px;
  font-weight: 700;
}

.cat-block-more {
  flex-shrink: 0;
  font-size: 13.5px;
  font-weight: 600;
  color: var(--primary);
  padding: 6px 14px;
  border-radius: var(--r-pill);
  transition: background var(--t-fast) var(--ease);
  white-space: nowrap;
}

.cat-block-more:hover {
  background: var(--primary-soft);
  color: var(--primary);
}

/* ---------------------------------------------------------------------------
 * 5. 全部分类入口卡片
 * ------------------------------------------------------------------------- */
.cat-list-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 16px;
}

.cat-card {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 20px 22px;
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--r);
  box-shadow: var(--shadow-sm);
  transition: all var(--t) var(--ease);
}

.cat-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-lg);
  border-color: var(--primary-soft-2);
}

.cat-card-icon {
  display: grid;
  place-items: center;
  width: 52px;
  height: 52px;
  font-size: 26px;
  background: var(--primary-soft);
  border-radius: 14px;
  flex-shrink: 0;
  transition: transform var(--t) var(--ease);
}

.cat-card:hover .cat-card-icon { transform: scale(1.08) rotate(-4deg); }

.cat-card-body { flex: 1; min-width: 0; }

.cat-card-name {
  font-size: 16.5px;
  font-weight: 700;
  margin-bottom: 2px;
}

.cat-card-count {
  font-size: 13px;
  color: var(--text-3);
}

.cat-card-arrow {
  font-size: 24px;
  color: var(--text-3);
  transition: all var(--t-fast) var(--ease);
}

.cat-card:hover .cat-card-arrow {
  color: var(--primary);
  transform: translateX(4px);
}

/* ---------------------------------------------------------------------------
 * 6. 自研工具卡片（/tools 页）
 * ------------------------------------------------------------------------- */
.self-tool-card { cursor: pointer; }

.tool-badge {
  position: absolute;
  top: 14px;
  right: 14px;
  padding: 3px 10px;
  font-size: 11.5px;
  font-weight: 700;
  color: #fff;
  background: linear-gradient(135deg, #ffb347, #ff8a3d);
  border-radius: var(--r-pill);
  box-shadow: 0 4px 10px rgba(255, 138, 61, 0.35);
}

.tool-head {
  display: flex;
  align-items: center;
  gap: 8px;
}

.tool-cat-icon {
  font-size: 17px;
}

.tool-cat {
  font-size: 12px;
  font-weight: 600;
  color: var(--primary);
  background: var(--primary-soft);
  padding: 2px 10px;
  border-radius: var(--r-pill);
}

/* ---------------------------------------------------------------------------
 * 7. 空状态
 * ------------------------------------------------------------------------- */
.empty-state {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 14px;
  padding: 60px 20px;
  text-align: center;
}

.empty-icon {
  font-size: 56px;
  line-height: 1;
  animation: empty-float 2.6s ease-in-out infinite;
}

@keyframes empty-float {
  0%, 100% { transform: translateY(0); }
  50%      { transform: translateY(-8px); }
}

.empty-state p {
  font-size: 15px;
  color: var(--text-2);
}

/* ---------------------------------------------------------------------------
 * 8. 文章卡片
 * ------------------------------------------------------------------------- */
.article-list {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 18px;
}

.article-card {
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: 22px;
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--r);
  box-shadow: var(--shadow-sm);
  transition: all var(--t) var(--ease);
  cursor: pointer;
}

.article-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-lg);
  border-color: var(--primary-soft-2);
}

.article-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
}

.article-meta time {
  font-size: 12.5px;
  color: var(--text-3);
}

.article-card h4 {
  font-size: 16.5px;
  line-height: 1.45;
  transition: color var(--t-fast) var(--ease);
}

.article-card:hover h4 { color: var(--primary); }

.article-card p {
  font-size: 13.5px;
  color: var(--text-2);
  line-height: 1.7;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

/* ---------------------------------------------------------------------------
 * 9. 外链工具详情
 * ------------------------------------------------------------------------- */
.tool-detail {
  padding: 36px;
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--r-lg);
  box-shadow: var(--shadow);
}

.tool-detail h1 {
  font-size: clamp(24px, 3vw, 32px);
  margin: 14px 0 12px;
}

.tool-detail-desc {
  font-size: 15.5px;
  line-height: 1.8;
  color: var(--text-2);
  margin-bottom: 24px;
}

.tool-detail-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.tool-detail-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}