/* ── HOMEPAGE STYLES ─────────────────────────────────────────── */

/* Hero Section */
.hero {
  background: linear-gradient(135deg, var(--brand-lighter) 0%, var(--panel) 50%, var(--brand-lighter) 100%);
  border-radius: var(--radius-lg);
  padding: 4rem 2rem;
  text-align: center;
  margin-bottom: 4rem;
  border: 1px solid var(--border-light);
  box-shadow: var(--shadow);
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: radial-gradient(circle at 20% 80%, rgba(67, 97, 238, 0.1) 0%, transparent 50%),
              radial-gradient(circle at 80% 20%, rgba(67, 97, 238, 0.08) 0%, transparent 50%);
  pointer-events: none;
}

.hero-content {
  position: relative;
  z-index: 1;
}

.hero-title {
  font-size: clamp(2.5rem, 5vw, 4rem);
  font-weight: 800;
  color: var(--text);
  margin-bottom: 1.5rem;
  letter-spacing: -0.025em;
  line-height: 1.1;
  background: linear-gradient(135deg, var(--text) 0%, var(--brand-dark) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-subtitle {
  font-size: 1.35rem;
  color: var(--text-muted);
  max-width: 650px;
  margin: 0 auto;
  line-height: 1.6;
  font-weight: 500;
}

/* Filter Section */
.filter-section {
  margin-bottom: 3rem;
}

.filter-title {
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 1rem;
}

.filters {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

/* Updated Filter Chips - Two-level filtering system */
.filter-chip {
  padding: 0.75rem 1.25rem;
  border-radius: 999px;
  font-weight: 500;
  font-size: 0.875rem;
  cursor: pointer;
  transition: var(--transition);
  border: 1px solid var(--border);
  background: var(--panel);
  color: var(--text-muted);
  user-select: none;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.filter-chip:hover {
  border-color: var(--brand);
  color: var(--brand);
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

.filter-chip:focus {
  outline: none;
  box-shadow: 0 0 0 3px rgba(67, 97, 238, 0.3);
}

/* Regular Category Chips */
.filter-chip-category.active {
  background: var(--brand);
  color: white;
  border-color: var(--brand);
  box-shadow: var(--shadow-md);
}

/* Golden Field Chips - Updated with better contrast and vibrant colors */
.filter-chip-field {
  background: linear-gradient(135deg, rgba(255, 193, 7, 0.15), rgba(255, 152, 0, 0.15));
  color: #e65100;
  border-color: rgba(255, 152, 0, 0.4);
  font-weight: 600;
  box-shadow: 0 2px 4px rgba(255, 193, 7, 0.1);
}

.filter-chip-field:hover {
  background: linear-gradient(135deg, rgba(255, 193, 7, 0.25), rgba(255, 152, 0, 0.25));
  border-color: rgba(255, 152, 0, 0.6);
  color: #d84315;
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(255, 193, 7, 0.3);
}

.filter-chip-field.active {
  background: linear-gradient(135deg, #ffc107, #ff9800);
  color: white;
  border-color: #f57c00;
  box-shadow: 0 6px 20px rgba(255, 193, 7, 0.6);
  transform: translateY(-2px);
}

.filter-chip-field:focus {
  box-shadow: 0 0 0 3px rgba(255, 193, 7, 0.4);
}

/* Updated Chip Count */
.chip-count {
  background: rgba(255, 255, 255, 0.2);
  color: inherit;
  font-size: 0.75rem;
  font-weight: 600;
  padding: 0.125rem 0.5rem;
  border-radius: 999px;
  min-width: 1.5rem;
  text-align: center;
}

.filter-chip-field .chip-count {
  background: rgba(255, 255, 255, 0.8);
  color: #e65100;
}

.filter-chip-field.active .chip-count {
  background: rgba(255, 255, 255, 0.95);
  color: #bf360c;
}

.filter-chip-category.active .chip-count {
  background: rgba(255, 255, 255, 0.2);
}

.filter-chip:not(.active) .chip-count {
  background: var(--border-light);
  color: var(--text-light);
}

/* ── UDEMY-STYLE COURSE CARDS ─────────────────────────────────────────── */

/* Course Grid - Now uses CSS Grid for better responsive layout */
.courses-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 2rem;
  margin-top: 2rem;
}

.course-card {
  background: var(--panel);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
  overflow: hidden;
  transition: var(--transition);
  border: 1px solid var(--border);
  position: relative;
  animation: fadeInUp 0.4s ease-out;
  height: fit-content;
}

.course-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-xl);
  border-color: var(--brand);
}

.course-card-link {
  display: block;
  text-decoration: none;
  color: inherit;
  cursor: pointer;
}

/* Course Thumbnail Section - Fixed for 16:9 aspect ratio */
.course-thumbnail {
  position: relative;
  width: 100%;
  aspect-ratio: 16/9; /* This maintains perfect 16:9 ratio */
  overflow: hidden;
  background: var(--border-light);
}

.course-thumbnail-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
  transition: var(--transition);
}

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

.course-thumbnail-placeholder {
  width: 100%;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, var(--brand) 0%, var(--brand-dark) 100%);
  position: relative;
}

.course-thumbnail-icon {
  width: 60px;
  height: 60px;
  filter: brightness(0) invert(1);
  opacity: 0.9;
}

.course-thumbnail-text {
  font-size: 3rem;
  font-weight: 800;
  color: white;
  text-transform: uppercase;
}

/* Course Number Badges - Now positioned on the left */
.course-number-badge {
  position: absolute;
  top: 12px;
  left: 12px;
  padding: 6px 10px;
  border-radius: 6px;
  font-size: 0.7rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  z-index: 10;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
  backdrop-filter: blur(4px);
}

/* Course Badges - Now positioned on the right, more subtle styling */
.course-badge {
  position: absolute;
  top: 12px;
  right: 12px;
  padding: 6px 10px;
  border-radius: 6px;
  font-size: 0.7rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  z-index: 10;
  backdrop-filter: blur(8px);
  transition: all 0.2s ease;
}

.badge-free {
  background: rgba(16, 185, 129, 0.9);
  color: white;
  border: 1px solid rgba(255, 255, 255, 0.3);
  box-shadow: 0 2px 8px rgba(16, 185, 129, 0.3);
}

.badge-paid {
  background: rgba(251, 146, 60, 0.9);
  color: white;
  border: 1px solid rgba(255, 255, 255, 0.4);
  box-shadow: 0 2px 8px rgba(251, 146, 60, 0.3);
}

.course-card:hover .course-badge {
  transform: translateY(-1px);
  backdrop-filter: blur(12px);
}

.course-card:hover .badge-free {
  background: rgba(16, 185, 129, 1);
  box-shadow: 0 4px 12px rgba(16, 185, 129, 0.4);
}

.course-card:hover .badge-paid {
  background: rgba(251, 146, 60, 1);
  box-shadow: 0 4px 12px rgba(251, 146, 60, 0.4);
}

.course-number-badge.start-here {
  background: rgba(255, 255, 255, 0.95);
  color: #1e3a8a;
  border: 1px solid rgba(30, 58, 138, 0.2);
  font-weight: 600;
}

.course-number-badge.course-number {
  background: rgba(255, 255, 255, 0.9);
  color: #64748b;
  border: 1px solid rgba(100, 116, 139, 0.2);
  min-width: 28px;
  text-align: center;
  font-weight: 600;
}

/* Course Info Section */
.course-info {
  padding: 1.5rem;
}

.course-title {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 0.75rem;
  color: var(--text);
  line-height: 1.4;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  min-height: 2.8rem;
}

.course-description {
  font-size: 0.875rem;
  color: var(--text-muted);
  line-height: 1.5;
  margin-bottom: 1rem;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  min-height: 2.6rem;
}

.course-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem;
  font-size: 0.8rem;
  margin-top: auto;
}

.course-meta-right {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.course-category {
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  flex: 1;
}

.course-duration {
  color: var(--text-light);
  font-weight: 500;
  background: var(--border-light);
  padding: 0.25rem 0.5rem;
  border-radius: 4px;
  white-space: nowrap;
}

/* Course Rating Styles */
.course-rating {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.75rem;
}

.stars {
  display: flex;
  gap: 0.1rem;
}

.star {
  color: #e5e7eb;
  font-size: 0.875rem;
  transition: color 0.1s ease;
}

.star.filled {
  color: #fbbf24;
}

.star.partial {
  background: linear-gradient(90deg, #fbbf24 80%, #e5e7eb 80%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.rating-text {
  color: var(--text-muted);
  font-weight: 600;
  font-size: 0.75rem;
}

/* Hover effects for number badges */
.course-card:hover .course-number-badge.start-here {
  background: rgba(255, 255, 255, 1);
  color: #1e40af;
  border-color: rgba(30, 58, 138, 0.3);
  transform: scale(1.02);
}

.course-card:hover .course-number-badge.course-number {
  background: rgba(255, 255, 255, 1);
  color: #475569;
  border-color: rgba(100, 116, 139, 0.3);
  transform: scale(1.02);
}

/* ── RESPONSIVE DESIGN ─────────────────────────────────────────── */

@media (max-width: 768px) {
  .hero {
    margin-bottom: 3rem;
    padding: 3rem 1.5rem;
  }
  
  .courses-grid {
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 1.5rem;
  }
  
  .course-info {
    padding: 1.25rem;
  }
  
  .filters {
    gap: 0.5rem;
  }
  
  .filter-chip {
    padding: 0.5rem 1rem;
    font-size: 0.8rem;
    gap: 0.4rem;
  }
  
  .chip-count {
    padding: 0.1rem 0.4rem;
    font-size: 0.7rem;
  }
  
  .course-badge {
    padding: 6px 10px;
    font-size: 0.7rem;
  }
}

@media (max-width: 480px) {
  .courses-grid {
    grid-template-columns: 1fr;
    gap: 1.25rem;
  }
  
  .course-thumbnail-icon {
    width: 40px;
    height: 40px;
  }
  
  .course-thumbnail-text {
    font-size: 2rem;
  }
  
  .filter-chip .chip-count {
    display: none;
  }
  
  .course-badge {
    padding: 5px 8px;
    font-size: 0.65rem;
  }
}