/* ============================================================
   课程浏览器样式
   ============================================================ */

.course-header {
  margin-bottom: 14px;
}
.course-header h2 {
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 4px;
}
.course-header__stats {
  font-size: 13px;
  color: var(--tg-hint);
}

.course-level-tabs {
  margin-bottom: 16px;
}

.course-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.course-card {
  display: flex;
  align-items: center;
  gap: 12px;
  background: var(--tg-secondary-bg);
  border-radius: var(--radius);
  padding: 14px;
  box-shadow: var(--shadow);
  cursor: pointer;
  transition: opacity 0.15s;
}
.course-card:active {
  opacity: 0.7;
}
.course-card--done {
  border-left: 3px solid #34c759;
}
.course-card--current {
  border-left: 3px solid var(--tg-button);
}
.course-card--pending {
  border-left: 3px solid var(--tg-hint);
  opacity: 0.6;
}
.course-card__icon {
  font-size: 28px;
  flex-shrink: 0;
}
.course-card__info {
  flex: 1;
  min-width: 0;
}
.course-card__topic {
  font-weight: 600;
  font-size: 15px;
  margin-bottom: 4px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.course-card__meta {
  display: flex;
  align-items: center;
  gap: 8px;
}
.course-card__date {
  font-size: 11px;
  color: var(--tg-hint);
}
.course-start-btn {
  flex-shrink: 0;
}