/* ==========================================================================
   FREE COURSES SECTION
   ========================================================================== */

/* Main Free Courses Section */
.free-courses {
  padding: var(--spacing-5xl) 0;
  background: linear-gradient(135deg, #0f172a 0%, #1e293b 50%, #334155 100%);
  position: relative;
  overflow: hidden;
}

.free-courses::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: 
    radial-gradient(circle at 25% 25%, rgba(34, 197, 94, 0.1) 0%, transparent 50%),
    radial-gradient(circle at 75% 75%, rgba(59, 130, 246, 0.1) 0%, transparent 50%);
  pointer-events: none;
}

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

.free-courses .section-title {
  font-size: var(--font-size-4xl);
  font-weight: var(--font-weight-black);
  color: #ffffff;
  margin-bottom: var(--spacing-md);
}

.free-text {
  background: linear-gradient(135deg, #22c55e 0%, #16a34a 100%);
  background-clip: text;
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  position: relative;
}

.free-text::after {
  content: '✨';
  position: absolute;
  top: -10px;
  right: -20px;
  font-size: 20px;
  animation: sparkle 2s ease-in-out infinite;
}

.free-courses .section-subtitle {
  font-size: var(--font-size-xl);
  color: rgba(255, 255, 255, 0.8);
  max-width: 600px;
  margin: 0 auto;
  line-height: var(--line-height-relaxed);
}

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

/* Free Course Card */
.free-course-card {
  background: rgba(255, 255, 255, 0.05);
  border: 2px solid rgba(34, 197, 94, 0.2);
  border-radius: var(--border-radius-xl);
  overflow: hidden;
  transition: all var(--transition-normal);
  backdrop-filter: blur(10px);
  position: relative;
}

.free-course-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(135deg, rgba(34, 197, 94, 0.1) 0%, rgba(59, 130, 246, 0.05) 100%);
  opacity: 0;
  transition: opacity var(--transition-normal);
  pointer-events: none;
}

.free-course-card:hover {
  transform: translateY(-8px);
  border-color: rgba(34, 197, 94, 0.4);
  box-shadow: 
    0 20px 40px rgba(0, 0, 0, 0.3),
    0 0 0 1px rgba(34, 197, 94, 0.2);
}

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

/* Free Course Image */
.free-course-image {
  position: relative;
  height: 200px;
  overflow: hidden;
}

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

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

/* Free Badge */
.free-badge {
  position: absolute;
  top: var(--spacing-md);
  left: var(--spacing-md);
  background: linear-gradient(135deg, #22c55e 0%, #16a34a 100%);
  color: #ffffff;
  padding: var(--spacing-xs) var(--spacing-sm);
  border-radius: var(--border-radius-full);
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-bold);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  box-shadow: 0 4px 12px rgba(34, 197, 94, 0.3);
  animation: pulse-green 2s ease-in-out infinite;
}

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

.free-course-title {
  font-size: var(--font-size-xl);
  font-weight: var(--font-weight-bold);
  color: #ffffff;
  margin-bottom: var(--spacing-xs);
  line-height: var(--line-height-tight);
  transition: all var(--transition-fast);
}

.free-course-card:hover .free-course-title {
  color: #ffffff;
  text-shadow: 0 2px 4px rgba(0, 0, 0, 0.7);
}

.free-course-instructor {
  font-size: var(--font-size-sm);
  color: rgba(34, 197, 94, 0.9);
  margin-bottom: var(--spacing-md);
  font-weight: var(--font-weight-medium);
  transition: all var(--transition-fast);
}

.free-course-card:hover .free-course-instructor {
  color: #22c55e;
  text-shadow: 0 1px 2px rgba(0, 0, 0, 0.5);
}

.free-course-description {
  font-size: var(--font-size-sm);
  color: rgba(255, 255, 255, 0.7);
  line-height: var(--line-height-relaxed);
  margin-bottom: var(--spacing-lg);
  transition: all var(--transition-fast);
}

.free-course-card:hover .free-course-description {
  color: rgba(255, 255, 255, 0.9);
  text-shadow: 0 1px 2px rgba(0, 0, 0, 0.5);
}

/* Free Course Meta */
.free-course-meta {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-md);
  margin-bottom: var(--spacing-lg);
  font-size: var(--font-size-xs);
  color: rgba(255, 255, 255, 0.6);
}

.free-course-meta span {
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
}

/* Free Course Footer */
.free-course-footer {
  text-align: center;
}

.btn-free-enroll {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: var(--spacing-md) var(--spacing-xl);
  background: linear-gradient(135deg, #22c55e 0%, #16a34a 100%);
  color: #ffffff;
  border: none;
  border-radius: var(--border-radius-lg);
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-semibold);
  text-decoration: none;
  transition: all var(--transition-normal);
  box-shadow: 0 8px 20px rgba(34, 197, 94, 0.3);
  position: relative;
  overflow: hidden;
}

.btn-free-enroll::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
  transition: left 0.6s ease;
}

.btn-free-enroll:hover {
  color: whitesmoke;
  transform: translateY(-2px);
  box-shadow: 0 12px 25px rgba(34, 197, 94, 0.4);
}

.btn-free-enroll:hover::before {
  left: 100%;
}

/* Free Courses CTA */
.free-courses-cta {
  text-align: center;
  position: relative;
  z-index: 2;
}

.free-cta-text {
  font-size: var(--font-size-lg);
  color: rgba(255, 255, 255, 0.8);
  margin-bottom: var(--spacing-lg);
}

.free-cta-btn {
  padding: var(--spacing-md) var(--spacing-2xl);
  border: 2px solid rgba(34, 197, 94, 0.5);
  background: transparent;
  color: #22c55e;
  font-weight: var(--font-weight-semibold);
  transition: all var(--transition-normal);
}

.free-cta-btn:hover {
  background: linear-gradient(135deg, #22c55e 0%, #16a34a 100%);
  border-color: #22c55e;
  color: #ffffff;
  transform: translateY(-2px);
  box-shadow: 0 8px 20px rgba(34, 197, 94, 0.2);
}

/* Dedicated button class for View All Free Courses */
.btn-view-free-course {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: var(--spacing-md) var(--spacing-2xl);
  border: 2px solid rgba(34, 197, 94, 0.5);
  background: transparent;
  color: #22c55e;
  border-radius: var(--border-radius-lg);
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-semibold);
  text-decoration: none;
  transition: all var(--transition-normal);
  position: relative;
  overflow: hidden;
}

.btn-view-free-course::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
  transition: left 0.6s ease;
}

.btn-view-free-course:hover {
  background: linear-gradient(135deg, #22c55e 0%, #16a34a 100%);
  border-color: #22c55e;
  color: #ffffff;
  transform: translateY(-2px);
  box-shadow: 0 12px 25px rgba(34, 197, 94, 0.4);
}

.btn-view-free-course:hover::before {
  left: 100%;
}

/* Animations */
@keyframes sparkle {
  0%, 100% {
    transform: scale(1) rotate(0deg);
    opacity: 1;
  }
  50% {
    transform: scale(1.2) rotate(180deg);
    opacity: 0.8;
  }
}

@keyframes pulse-green {
  0%, 100% {
    box-shadow: 0 4px 12px rgba(34, 197, 94, 0.3);
  }
  50% {
    box-shadow: 0 4px 20px rgba(34, 197, 94, 0.5);
  }
}

/* Responsive Design */
@media (max-width: 1024px) {
  .free-courses-grid {
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-xl);
  }
}

@media (max-width: 768px) {
  .free-courses {
    padding: var(--spacing-4xl) 0;
  }
  
  .free-courses .section-title {
    font-size: var(--font-size-3xl);
  }
  
  .free-courses .section-subtitle {
    font-size: var(--font-size-lg);
  }
  
  .free-courses-grid {
    grid-template-columns: 1fr;
    gap: var(--spacing-lg);
  }
  
  .free-course-meta {
    flex-direction: column;
    gap: var(--spacing-sm);
  }
}

@media (max-width: 480px) {
  .free-course-content {
    padding: var(--spacing-lg);
  }
  
  .free-course-title {
    font-size: var(--font-size-lg);
  }
  
  .btn-free-enroll {
    width: 100%;
    padding: var(--spacing-sm) var(--spacing-lg);
  }
  
  .free-text::after {
    right: -15px;
    font-size: 16px;
  }
}