/* ==========================================================================
   COURSES SECTION COMPONENT
   ========================================================================== */

/* Main Course Discovery Section */
.courses-section {
  padding: var(--spacing-5xl) 0;
  background: linear-gradient(135deg, var(--color-bg-primary) 0%, var(--color-bg-secondary) 100%);
  position: relative;
}

.courses-section::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: 
    radial-gradient(circle at 70% 30%, rgba(99, 102, 241, 0.1) 0%, transparent 50%),
    radial-gradient(circle at 30% 70%, rgba(16, 185, 129, 0.1) 0%, transparent 50%);
  pointer-events: none;
}

/* Section Header */
.courses-header {
  text-align: center;
  margin-bottom: var(--spacing-4xl);
  position: relative;
  z-index: 2;
}

.courses-title {
  font-size: var(--font-size-4xl);
  font-weight: var(--font-weight-black);
  color: var(--color-text-primary);
  margin-bottom: var(--spacing-md);
  background: linear-gradient(135deg, #ffffff 0%, #e5e5e5 50%, var(--color-primary-light) 100%);
  background-clip: text;
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.courses-subtitle {
  font-size: var(--font-size-xl);
  color: var(--color-text-secondary);
  max-width: 600px;
  margin: 0 auto;
  line-height: var(--line-height-relaxed);
}

/* Course Grid */
.courses-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
  gap: var(--spacing-xl);
  margin-bottom: var(--spacing-4xl);
  position: relative;
  z-index: 2;
}

/* Course Card */
.course-card {
  background: var(--color-bg-card);
  border-radius: var(--border-radius-2xl);
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, 0.1);
  transition: all var(--transition-normal);
  position: relative;
  cursor: pointer;
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
}

.course-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(135deg, rgba(99, 102, 241, 0.1) 0%, rgba(16, 185, 129, 0.1) 100%);
  opacity: 0;
  transition: opacity var(--transition-normal);
  z-index: 1;
}

.course-card:hover::before {
  opacity: 1;
}

.course-card:hover {
  transform: translateY(-8px);
  border-color: rgba(99, 102, 241, 0.3);
  box-shadow: 
    0 20px 40px rgba(0, 0, 0, 0.4),
    0 0 30px rgba(99, 102, 241, 0.2);
}

/* Course Image */
.course-image {
  position: relative;
  height: 200px;
  overflow: hidden;
  background: linear-gradient(135deg, rgba(99, 102, 241, 0.1) 0%, rgba(245, 158, 11, 0.1) 100%);
}

.course-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition-slow);
}

/* Course image classes for consistency */
.course-img,
.featured-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition-slow);
  display: block;
}

.course-card:hover .course-image img,
.course-card:hover .course-img {
  transform: scale(1.05);
}

/* Course Badge */
.course-badge {
  position: absolute;
  top: var(--spacing-md);
  left: var(--spacing-md);
  background: rgba(0, 0, 0, 0.8);
  color: var(--color-text-primary);
  padding: var(--spacing-xs) var(--spacing-sm);
  border-radius: var(--border-radius-full);
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-semibold);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  z-index: 3;
}

.course-badge.featured {
  background: linear-gradient(135deg, var(--color-secondary) 0%, #d97706 100%);
}

.course-badge.new {
  background: linear-gradient(135deg, var(--color-accent) 0%, #059669 100%);
}

.course-badge.bestseller {
  background: linear-gradient(135deg, var(--color-danger) 0%, #dc2626 100%);
}

/* Course Content */
.course-content {
  padding: var(--spacing-xl);
  position: relative;
  z-index: 2;
}

.course-title {
  font-size: var(--font-size-xl);
  font-weight: var(--font-weight-bold);
  color: var(--color-text-primary);
  margin-bottom: var(--spacing-sm);
  line-height: var(--line-height-tight);
  transition: color var(--transition-fast);
}

.course-card:hover .course-title {
  color: var(--color-primary-light);
}

.course-description {
  color: var(--color-text-secondary);
  margin-bottom: var(--spacing-lg);
  line-height: var(--line-height-relaxed);
  font-size: var(--font-size-sm);
}

/* Course Meta */
.course-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--spacing-lg);
  flex-wrap: wrap;
  gap: var(--spacing-sm);
}

.course-instructor {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  color: var(--color-text-muted);
  font-size: var(--font-size-sm);
}

.instructor-avatar {
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: linear-gradient(135deg, rgba(1, 5, 237, 0.1) 0%, rgba(124, 11, 245, 0.1) 100%);
}

.course-rating {
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
  color: var(--color-secondary);
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
}

.course-stats {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--spacing-lg);
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
}

.course-duration,
.course-lessons,
.course-level {
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
}

/* Course Footer */
.course-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding-top: var(--spacing-lg);
}

.course-price {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
}

.price-current {
  font-size: var(--font-size-xl);
  font-weight: var(--font-weight-bold);
  color: var(--color-primary-light);
}

.price-original {
  font-size: var(--font-size-base);
  color: var(--color-text-muted);
  text-decoration: line-through;
}

.course-cta {
  padding: var(--spacing-sm) var(--spacing-lg);
  background: linear-gradient(135deg, rgba(1, 5, 237, 0.1) 0%, rgba(124, 11, 245, 0.1) 100%);
  color: var(--color-text-primary);
  border: none;
  border-radius: var(--border-radius-lg);
  font-weight: var(--font-weight-semibold);
  font-size: var(--font-size-sm);
  text-decoration: none;
  transition: all var(--transition-fast);
  position: relative;
  overflow: hidden;
  z-index: 3;
}

.course-cta::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(135deg, var(--color-primary-light) 0%, var(--color-primary) 100%);
  transition: left var(--transition-normal);
  z-index: -1;
}

.course-cta:hover::before {
  left: 0;
}

.course-cta:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 20px rgba(99, 102, 241, 0.3);
  color: var(--color-text-primary);
}

/* Featured Courses Section */
.featured-courses {
  margin-top: var(--spacing-5xl);
  position: relative;
  z-index: 2;
}

.featured-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--spacing-2xl);
  flex-wrap: wrap;
  gap: var(--spacing-md);
}

.featured-title {
  font-size: var(--font-size-3xl);
  font-weight: var(--font-weight-bold);
  color: var(--color-text-primary);
  background: linear-gradient(135deg, #ffffff 0%, var(--color-primary-light) 100%);
  background-clip: text;
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

/* Featured Courses Carousel */
.featured-carousel {
  position: relative;
  overflow: hidden;
  border-radius: var(--border-radius-2xl);
}

.carousel-container {
  display: flex;
  gap: var(--spacing-lg);
  overflow-x: auto;
  scroll-behavior: smooth;
  scroll-snap-type: x mandatory;
  padding: var(--spacing-sm);
  scrollbar-width: thin;
  scrollbar-color: rgba(99, 102, 241, 0.3) transparent;
}

.carousel-container::-webkit-scrollbar {
  height: 6px;
}

.carousel-container::-webkit-scrollbar-track {
  background: rgba(255, 255, 255, 0.1);
  border-radius: var(--border-radius-full);
}

.carousel-container::-webkit-scrollbar-thumb {
  background:linear-gradient(135deg, rgba(1, 5, 237, 0.1) 0%, rgba(124, 11, 245, 0.1) 100%);
  border-radius: var(--border-radius-full);
}

.carousel-container::-webkit-scrollbar-thumb:hover {
  background:linear-gradient(135deg, rgba(1, 5, 237, 0.1) 0%, rgba(124, 11, 245, 0.1) 100%);
}

/* Featured Course Card */
.featured-card {
  flex: 0 0 300px;
  background: var(--color-bg-card);
  border-radius: var(--border-radius-xl);
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, 0.1);
  transition: all var(--transition-normal);
  scroll-snap-align: start;
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  position: relative;
}

.featured-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(135deg, rgba(1, 5, 237, 0.25) 0%, rgba(142, 52, 238, 0.25) 100%);
  opacity: 0;
  transition: opacity var(--transition-normal);
  z-index: 1;
  border-radius: var(--border-radius-lg);
}

.featured-card:hover::before {
  opacity: 1;
}

.featured-card:hover {
  transform: translateY(-8px) scale(1.02);
  border-color: rgba(99, 102, 241, 0.3);
  box-shadow: 
    0 15px 35px rgba(0, 0, 0, 0.3),
    0 0 25px rgba(99, 102, 241, 0.2);
}

.featured-image {
  height: 160px;
  overflow: hidden;
  position: relative;
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-secondary) 100%);
}

.featured-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: all var(--transition-normal);
  filter: grayscale(100%);
}

.featured-card:hover .featured-image img,
.featured-card:hover .featured-img {
  transform: scale(1.05);
  filter: brightness(1.1) grayscale(0%);
}

.featured-card:hover .featured-image::after {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(135deg, rgba(1, 5, 237, 0.1) 0%, rgba(124, 11, 245, 0.1) 100%);
  animation: shine 0.6s ease-out;
}

.featured-content {
  padding: var(--spacing-lg);
  position: relative;
  z-index: 2;
}

.featured-course-title {
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-semibold);
  color: var(--color-text-primary);
  margin-bottom: var(--spacing-sm);
  line-height: var(--line-height-tight);
}

.featured-instructor {
  color: var(--color-text-muted);
  font-size: var(--font-size-sm);
  margin-bottom: var(--spacing-md);
}

.featured-price {
  font-size: var(--font-size-xl);
  font-weight: var(--font-weight-bold);
  color: var(--color-primary-light);
  transition: all var(--transition-fast);
}

.featured-card:hover .featured-price {
  transform: scale(1.05);
  color: var(--color-primary);
}

/* Shine animation for featured cards */
@keyframes shine {
  0% {
    left: -100%;
  }
  100% {
    left: 100%;
  }
}

/* RESPONSIVE DESIGN */

/* Large screens */
@media (min-width: 1200px) {
  .courses-grid {
    grid-template-columns: repeat(3, 1fr);
  }
  
  .featured-card {
    flex: 0 0 350px;
  }
}

/* Medium screens and tablets */
@media (max-width: 1024px) {
  .courses-section {
    padding: var(--spacing-4xl) 0;
  }
  
  .courses-grid {
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-lg);
  }
  
  .courses-title {
    font-size: var(--font-size-3xl);
  }
  
  .featured-card {
    flex: 0 0 280px;
  }
}

/* Small tablets and large phones */
@media (max-width: 768px) {
  .courses-section {
    padding: var(--spacing-3xl) 0;
  }
  
  .courses-grid {
    grid-template-columns: 1fr;
    gap: var(--spacing-md);
  }
  
  .courses-title {
    font-size: var(--font-size-2xl);
  }
  
  .courses-subtitle {
    font-size: var(--font-size-base);
  }
  
  .course-content {
    padding: var(--spacing-lg);
  }
  
  .course-meta {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--spacing-sm);
  }
  
  .course-stats {
    flex-wrap: wrap;
    gap: var(--spacing-sm);
  }
  
  .featured-header {
    flex-direction: column;
    align-items: flex-start;
    text-align: center;
  }
  
  .featured-title {
    font-size: var(--font-size-2xl);
  }
  
  .featured-card {
    flex: 0 0 250px;
  }
}

/* Mobile phones */
@media (max-width: 576px) {
  .courses-section {
    padding: var(--spacing-2xl) 0;
  }
  
  .course-content {
    padding: var(--spacing-md);
  }
  
  .course-image {
    height: 160px;
  }
  
  .course-footer {
    flex-direction: column;
    gap: var(--spacing-md);
    align-items: stretch;
  }
  
  .course-cta {
    width: 100%;
    text-align: center;
    justify-content: center;
  }
  
  .featured-card {
    flex: 0 0 220px;
  }
  
  .featured-content {
    padding: var(--spacing-md);
  }
}

/* Accessibility improvements */
@media (prefers-reduced-motion: reduce) {
  .course-card:hover {
    transform: none;
  }
  
  .course-card:hover .course-image img {
    transform: none;
  }
  
  .featured-card:hover {
    transform: none;
  }
  
  .featured-card:hover .featured-image img {
    transform: none;
  }
  
  .carousel-container {
    scroll-behavior: auto;
  }
  
  .featured-card:hover .featured-image::after {
    animation: none;
  }
}

/* High contrast mode support */
@media (prefers-contrast: high) {
  .course-card,
  .featured-card {
    border: 2px solid var(--color-text-primary);
  }
  
  .course-title,
  .featured-course-title {
    background: none;
    -webkit-text-fill-color: var(--color-text-primary);
    color: var(--color-text-primary);
  }
  
  .courses-title,
  .featured-title {
    background: none;
    -webkit-text-fill-color: var(--color-text-primary);
    color: var(--color-text-primary);
  }
}

/* Featured Courses CTA Button */
.featured-courses-cta {
  text-align: center;
  margin-top: 2rem;
}

.btn-view-featured {
  background: linear-gradient(135deg, #6366f1, #8b5cf6);
  color: white;
  padding: 1rem 2rem;
  border-radius: 8px;
  text-decoration: none;
  font-weight: 600;
  font-size: 1.1rem;
  transition: all 0.3s ease;
  display: inline-block;
  box-shadow: 0 4px 12px rgba(99, 102, 241, 0.3);
}

.btn-view-featured:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 20px rgba(99, 102, 241, 0.4);
  color: white;
  text-decoration: none;
}