.course-detail-hero {
  padding: 120px 0 48px;
  background: var(--text-primary);
  color: #fff;
}

.course-detail-hero .breadcrumb-item a {
  color: rgba(255, 255, 255, 0.6);
}

.course-detail-hero .breadcrumb-item.active {
  color: rgba(255, 255, 255, 0.9);
}

.course-detail-hero .breadcrumb-item + .breadcrumb-item::before {
  color: rgba(255, 255, 255, 0.4);
}

.course-detail-hero h1 {
  color: #fff;
  font-size: 2rem;
  margin-bottom: 12px;
}

.course-detail-hero p {
  color: rgba(255, 255, 255, 0.75);
  font-size: 1.05rem;
  max-width: 650px;
  margin-bottom: 20px;
}

.course-detail-hero .course-meta {
  display: flex;
  align-items: center;
  gap: 20px;
  flex-wrap: wrap;
  font-size: 0.9rem;
  color: rgba(255, 255, 255, 0.7);
}

.course-detail-hero .course-meta .stars {
  color: var(--warning);
}

.course-detail-hero .course-meta .instructor-link {
  color: rgba(255, 255, 255, 0.9);
  font-weight: 500;
}

.course-sidebar {
  background: var(--bg-white);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 0;
  position: sticky;
  top: 90px;
  box-shadow: var(--shadow-lg);
  overflow: hidden;
}

.course-sidebar .preview-img {
  width: 100%;
  aspect-ratio: 16/9;
  object-fit: cover;
}

.course-sidebar .sidebar-body {
  padding: 24px;
}

.course-sidebar .price-tag {
  font-size: 2rem;
  font-weight: 800;
  color: var(--text-primary);
  margin-bottom: 4px;
}

.course-sidebar .original-price {
  font-size: 1rem;
  color: var(--text-muted);
  text-decoration: line-through;
  margin-left: 8px;
}

.course-sidebar .discount-badge {
  background: var(--danger);
  color: #fff;
  padding: 2px 10px;
  border-radius: 50px;
  font-size: 0.8rem;
  font-weight: 600;
  margin-left: 8px;
}

.course-sidebar .sidebar-info {
  list-style: none;
  padding: 0;
  margin: 20px 0;
}

.course-sidebar .sidebar-info li {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 0;
  border-bottom: 1px solid var(--border-light);
  font-size: 0.9rem;
}

.course-sidebar .sidebar-info li i {
  color: var(--text-muted);
  margin-right: 8px;
}

.course-sidebar .sidebar-info li span:last-child {
  font-weight: 500;
}

.course-content-section .accordion-item {
  border: 1px solid var(--border);
  margin-bottom: 8px;
  border-radius: var(--radius) !important;
  overflow: hidden;
}

.course-content-section .accordion-button {
  font-weight: 600;
  font-size: 0.95rem;
  padding: 16px 20px;
  background: var(--bg-light);
}

.course-content-section .accordion-button:not(.collapsed) {
  background: var(--primary-light);
  color: var(--primary);
  box-shadow: none;
}

.course-content-section .accordion-body {
  padding: 0;
}

.course-content-section .lesson-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 20px;
  border-bottom: 1px solid var(--border-light);
  font-size: 0.9rem;
}

.course-content-section .lesson-item:last-child {
  border-bottom: none;
}

.course-content-section .lesson-item i {
  color: var(--text-muted);
  margin-right: 10px;
}

.course-content-section .lesson-item span.duration {
  color: var(--text-muted);
  font-size: 0.8rem;
}

.instructor-card {
  display: flex;
  gap: 20px;
  align-items: flex-start;
}

.instructor-card img {
  width: 80px;
  height: 80px;
  border-radius: 50%;
  object-fit: cover;
}

.instructor-card h5 {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 4px;
}

.instructor-card .title {
  font-size: 0.85rem;
  color: var(--primary);
  font-weight: 500;
  margin-bottom: 8px;
}

.instructor-card p {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

.cart-item {
  display: flex;
  gap: 16px;
  padding: 16px 0;
  border-bottom: 1px solid var(--border-light);
  align-items: center;
}

.cart-item img {
  width: 120px;
  height: 80px;
  border-radius: var(--radius);
  object-fit: cover;
  flex-shrink: 0;
}

.cart-item .cart-item-info {
  flex: 1;
}

.cart-item .cart-item-info h6 {
  font-size: 0.95rem;
  font-weight: 600;
  margin-bottom: 4px;
}

.cart-item .cart-item-info p {
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-bottom: 0;
}

.cart-item .cart-item-price {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--text-primary);
  white-space: nowrap;
}

.cart-item .btn-remove {
  color: var(--text-muted);
  border: none;
  background: none;
  font-size: 1.1rem;
  cursor: pointer;
  padding: 4px 8px;
  transition: var(--transition);
}

.cart-item .btn-remove:hover {
  color: var(--danger);
}

.cart-summary {
  background: var(--bg-light);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 24px;
  position: sticky;
  top: 90px;
}

.cart-summary h5 {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 20px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--border);
}

.cart-summary .summary-row {
  display: flex;
  justify-content: space-between;
  padding: 8px 0;
  font-size: 0.9rem;
  color: var(--text-secondary);
}

.cart-summary .summary-row.total {
  border-top: 2px solid var(--border);
  margin-top: 12px;
  padding-top: 16px;
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--text-primary);
}

.cart-empty {
  text-align: center;
  padding: 80px 24px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: 400px;
}

.cart-empty .cart-empty-icon {
  width: 120px;
  height: 120px;
  background: var(--primary-ultra-light);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 24px;
}

.cart-empty .cart-empty-icon i {
  font-size: 3rem;
  color: var(--primary);
}

.cart-empty h4 {
  font-weight: 700;
  margin-bottom: 8px;
  font-size: 1.5rem;
}

.cart-empty p {
  color: var(--text-muted);
  margin-bottom: 32px;
  font-size: 1rem;
  max-width: 360px;
}

.payment-card {
  background: var(--bg-white);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 32px;
}

.payment-card h5 {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 20px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--border);
}

.payment-methods {
  display: flex;
  gap: 12px;
  margin-bottom: 24px;
}

.payment-methods .method-option {
  flex: 1;
  padding: 16px;
  border: 2px solid var(--border);
  border-radius: var(--radius);
  text-align: center;
  cursor: pointer;
  transition: var(--transition);
  font-size: 0.9rem;
  font-weight: 500;
}

.payment-methods .method-option.active,
.payment-methods .method-option:hover {
  border-color: var(--primary);
  background: var(--primary-light);
  color: var(--primary);
}

.payment-methods .method-option i {
  font-size: 1.5rem;
  display: block;
  margin-bottom: 6px;
}