/*
 * ca-course-app.css
 * HumiDesk Addon — ChaoAcademy 成长方案
 *
 * 颜色变量全部复用 HumiDesk CSS 变量，降级 fallback 到原始值。
 * --hd-bg-card, --hd-text-primary, --hd-text-secondary, --hd-border-color
 * 如果宿主主题未定义这些变量，fallback 值与原设计一致。
 */

/* ============================================================
   根容器 — 融入工作台背景
   ============================================================ */
#ca-course-app {
  --ca-yellow:    #FACC15;
  --ca-text:      var(--hd-text-primary,    #1D1D1F);
  --ca-sub:       var(--hd-text-secondary,  #636366);
  --ca-bg-card:   var(--hd-bg-card,         #ffffff);
  --ca-border:    var(--hd-border-color,    rgba(0,0,0,0.06));
  --ca-radius:    20px;

  background-color: transparent; /* 融入工作台背景，不遮挡 */
  color: var(--ca-text);
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Display", "PingFang SC", sans-serif;
  -webkit-font-smoothing: antialiased;
}

/* ============================================================
   布局容器
   ============================================================ */
.ca-wrapper {
  max-width: 1400px;
  margin: 0 auto;
  padding: 40px 0 60px;
}

/* ============================================================
   Sensei 已购课程区
   ============================================================ */
.ca-sensei-zone {
  margin-bottom: 40px;
}

.ca-sensei-zone__header {
  margin-bottom: 16px;
}

.ca-sensei-zone__title {
  font-size: 1.1rem;
  font-weight: 700;
  margin: 0 0 4px;
  color: var(--ca-text);
}

.ca-sensei-zone__subtitle {
  font-size: 13px;
  color: var(--ca-sub);
  margin: 0;
}

.ca-sensei-zone__divider {
  border: none;
  border-top: 1px solid var(--ca-border);
  margin: 32px 0;
}

/* ============================================================
   筛选区 — 造句控制塔
   ============================================================ */
.ca-filter-section {
  text-align: center;
  margin-bottom: 48px;
}

.ca-sentence {
  font-size: 2rem;
  line-height: 1.6;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--ca-text);
}

.ca-drop {
  display: inline-block;
  position: relative;
  border-bottom: 3px solid var(--ca-yellow);
  padding: 0 4px;
  margin: 0 4px;
  cursor: pointer;
  transition: all 0.35s cubic-bezier(0.4, 0, 0.2, 1);
}

.ca-drop select {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  opacity: 0;
  cursor: pointer;
  font-size: inherit;
}

.ca-drop.has-val {
  background: rgba(250, 204, 21, 0.12);
  color: #0066cc;
  border-radius: 4px 4px 0 0;
}

.ca-label {
  padding: 0 4px;
}

.ca-count {
  color: var(--ca-sub);
  margin-top: 18px;
  font-size: 15px;
  font-weight: 500;
}

/* ── v1.3.0 Tag 第四筛选栏 ── */
.ca-tag-filter-bar {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-top: 14px;
  flex-wrap: wrap;
}

.ca-tag-filter-label {
  font-size: 15px;
  color: var(--hd-text-secondary, #64748b);
  white-space: nowrap;
  flex-shrink: 0;
}

.ca-tag-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 7px;
}

.ca-chip {
  display: inline-flex;
  align-items: center;
  padding: 5px 14px;
  border-radius: 999px;
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  border: 1.5px solid var(--hd-border-color, #e2e8f0);
  background: transparent;
  color: var(--hd-text-secondary, #64748b);
  transition: all 0.18s;
  line-height: 1;
}

.ca-chip:hover {
  border-color: var(--hd-brand-color, #FACC15);
  color: var(--hd-text-primary, #1e293b);
}

.ca-chip.active {
  background: var(--hd-brand-color, #FACC15);
  border-color: var(--hd-brand-color, #FACC15);
  color: #000;
}

/* ============================================================
   产品卡片网格
   ============================================================ */
.ca-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 20px;
}

/* 卡片 */
.ca-card {
  background: var(--ca-bg-card);
  border-radius: var(--ca-radius);
  padding: 22px;
  border: 1px solid var(--ca-border);
  display: flex;
  flex-direction: column;
  text-decoration: none;
  color: inherit;
  transition: all 0.5s cubic-bezier(0.23, 1, 0.32, 1);
  opacity: 0;
  transform: translateY(20px);
  will-change: transform, opacity;
  position: relative;
}

.ca-card.active {
  opacity: 1;
  transform: translateY(0);
}

.ca-card:hover {
  transform: scale(1.025) translateY(-6px);
  box-shadow: 0 30px 60px rgba(0,0,0,0.08);
}

/* 图片容器 */
.ca-card-img-wrapper {
  width: 100%;
  height: 150px;
  margin-bottom: 16px;
  border-radius: 12px;
  background-color: #fbfbfd;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 10px;
  box-sizing: border-box;
  overflow: hidden;
}

.ca-card-img-wrapper img {
  max-width: 100%;
  max-height: 100%;
  object-fit: contain;
  transition: transform 0.5s ease;
}

.ca-card:hover .ca-card-img-wrapper img {
  transform: scale(1.06);
}

/* 占位图 */
.ca-placeholder {
  width: 100%;
  height: 100%;
  border-radius: 8px;
  background: linear-gradient(135deg, #eee 0%, #f5f5f7 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 32px;
  font-weight: 700;
  color: #ccc;
}

/* meta 行：badge + tags 同行 */
.ca-card-meta-row {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 6px;
  margin-bottom: 8px;
}

.ca-card-badge {
  font-size: 10px;
  font-weight: 700;
  color: #aeaeb2;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  flex-shrink: 0;
}

/* 动态自定义 Tag 标签池（Phase 6 预埋） */
.ca-tag-pool {
  display: flex;
  flex-wrap: wrap;
  gap: 4px;
}

.ca-custom-tag {
  font-size: 11px;
  padding: 2px 8px;
  background: rgba(0, 102, 204, 0.08);
  color: #0066cc;
  border-radius: 4px;
  font-weight: 600;
  white-space: nowrap;
}

/* 标题 */
.ca-card-title {
  font-size: 1.1rem !important;
  font-weight: 700 !important;
  color: #8b6d3b !important;
  margin: 0 0 8px !important;
  line-height: 1.35 !important;
  letter-spacing: -0.01em !important;
}

/* 描述：3行截断 */
.ca-card-desc {
  font-size: 0.8rem;
  color: var(--ca-sub);
  line-height: 1.55;
  margin: 0 0 14px;
  flex-grow: 1;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

/* 标准"了解详情"链接 */
.ca-card-more {
  font-size: 13px;
  font-weight: 600;
  color: #0066cc;
  margin-top: auto;
}

/* 升级版强 CTA 胶囊按钮（有 cta_text 配置时启用） */
.ca-cta-btn {
  display: inline-block;
  text-align: center;
  background: var(--hd-brand-color, var(--ca-yellow));
  color: #000 !important;
  padding: 9px 18px;
  border-radius: 10px;
  font-weight: 700;
  font-size: 13px;
  margin-top: auto;
  transition: all 0.3s cubic-bezier(0.15, 0.83, 0.66, 1);
  line-height: 1;
}

.ca-card:hover .ca-cta-btn {
  transform: scale(1.03);
  box-shadow: 0 8px 20px rgba(250, 204, 21, 0.35);
}

/* v1.2.0 — 已购状态 CTA（绿色，强调进入内容） */
.ca-cta-purchased {
  background: #16a34a !important;
  color: #fff !important;
  letter-spacing: 0.02em;
}

.ca-card:hover .ca-cta-purchased {
  box-shadow: 0 8px 20px rgba(22, 163, 74, 0.35);
}

/* v1.2.0 — 免费产品 CTA（蓝色胶囊） */
.ca-cta-free {
  background: #2563eb !important;
  color: #fff !important;
}

.ca-card:hover .ca-cta-free {
  box-shadow: 0 8px 20px rgba(37, 99, 235, 0.30);
}

/* 空结果 */
.ca-empty {
  text-align: center;
  padding: 48px 20px;
  color: var(--ca-sub);
  font-size: 15px;
}

/* ============================================================
   响应式
   ============================================================ */
@media (max-width: 768px) {
  .ca-sentence {
    font-size: 1.5rem;
  }

  .ca-grid {
    grid-template-columns: 1fr;
  }

  .ca-wrapper {
    padding: 24px 0 40px;
  }
}