/* 전체 래퍼 */
div.cb-courses-wrapper {
  max-width: 1200px;
  margin: 0 auto;
  padding: 2rem 0;
}

/* 강좌 행 그리드 */
div.cb-course-row {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
  margin-bottom: 2rem;
}

/* 반응형 디자인 */
@media (max-width: 1024px) {
  div.cb-course-row {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 640px) {
  div.cb-course-row {
    grid-template-columns: 1fr;
  }
}

/* 강좌 카드 */
div.cb-course-card {
  background: #ffffff;
  border-radius: 16px;
  overflow: hidden;
  box-shadow: 0 4px 6px rgba(0, 0, 0, 0.07);
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  display: flex;
  flex-direction: column;
  height: 100%;
  border: 1px solid rgba(0, 0, 0, 0.05);
}

div.cb-course-card:hover {
  transform: translateY(-8px);
  box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.1),
              0 10px 10px -5px rgba(0, 0, 0, 0.04);
}

/* 썸네일 영역 */
.cb-course-thumbnail {
  position: relative;
  width: 100%;
  height: 200px;
  overflow: hidden;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
}

.cb-course-thumbnail img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.3s ease;
}

div.cb-course-card:hover .cb-course-thumbnail img {
  transform: scale(1.1);
}

/* 플레이스홀더 */
.cb-course-placeholder {
  width: 100%;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: rgba(255, 255, 255, 0.8);
}

/* 오버레이 */
.cb-course-overlay {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  padding: 1rem;
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
}

/* 카테고리 배지 */
.cb-course-category {
  background: rgba(255, 255, 255, 0.95);
  color: #667eea;
  padding: 0.375rem 0.875rem;
  border-radius: 20px;
  font-size: 0.75rem;
  font-weight: 600;
  backdrop-filter: blur(10px);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

/* 콘텐츠 영역 */
.cb-course-content {
  padding: 1.5rem;
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

/* 제목 */
h4.cb-course-title {
  font-size: 1.125rem;
  font-weight: 700;
  margin: 0;
  color: #1a202c;
  line-height: 1.4;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

/* 요약 */
div.cb-course-summary {
  font-size: 0.875rem;
  color: #718096;
  line-height: 1.6;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
  flex: 1;
}

/* 메타 정보 */
.cb-course-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  padding-top: 0.75rem;
  margin-top: 0.5rem;
  border-top: 1px solid rgba(0, 0, 0, 0.06);
}

.cb-meta-item {
  display: flex;
  align-items: center;
  gap: 0.375rem;
  font-size: 0.8125rem;
  color: #718096;
  white-space: nowrap;
}

.cb-meta-item svg {
  color: #a0aec0;
}

/* 푸터 영역 */
.cb-course-footer {
  padding: 0 1.5rem 1.5rem;
  display: flex;
  align-items: center;
  justify-content: center;
}

/* 버튼 */
.cb-course-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  width: 80%;
  padding: 0.75rem 1.5rem;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  color: white;
  text-decoration: none;
  border-radius: 10px;
  font-weight: 600;
  font-size: 0.9375rem;
  transition: all 0.3s ease;
  box-shadow: 0 4px 12px rgba(102, 126, 234, 0.3);
}

.cb-course-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 20px rgba(102, 126, 234, 0.4);
  color: white;
}

.cb-course-btn svg {
  transition: transform 0.3s ease;
}

.cb-course-btn:hover svg {
  transform: translateX(4px);
}

/* 로딩 상태 */
.cb-courses-wrapper.loading {
  opacity: 0.6;
  pointer-events: none;
}

/* 빈 상태 */
.cb-courses-empty {
  text-align: center;
  padding: 4rem 2rem;
  color: #718096;
  font-size: 1.125rem;
}