/**
 * SinBar Academy - Course Catalog & Cards Styling
 */

.catalog-page-container {
  width: 100%;
  max-width: var(--max-width-main);
  margin: 0 auto;
  padding: 3rem 1.5rem 6rem;
}

.catalog-header {
  position: relative;
  text-align: center;
  max-width: 760px;
  margin: 0 auto 3.5rem;
}

.catalog-header-glow {
  position: absolute;
  top: -40px;
  left: 50%;
  transform: translateX(-50%);
  width: 350px;
  height: 180px;
  background: radial-gradient(circle, rgba(99, 102, 241, 0.2) 0%, transparent 70%);
  filter: blur(60px);
  pointer-events: none;
}

.catalog-title {
  font-size: clamp(2rem, 4vw, 2.8rem);
  font-weight: 800;
  margin-bottom: 0.8rem;
}

.catalog-subline {
  font-size: 1.05rem;
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: 2rem;
}

.catalog-search-bar {
  display: flex;
  align-items: center;
  gap: 0.85rem;
  max-width: 580px;
  margin: 0 auto;
  padding: 0.85rem 1.25rem;
  background: var(--bg-surface-elevated);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-full);
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-fast);
}

.catalog-search-bar:focus-within {
  border-color: var(--border-focus);
  box-shadow: 0 0 25px -5px var(--accent-glow);
}

.catalog-search-bar i {
  color: var(--text-muted);
  width: 1.2rem;
  height: 1.2rem;
  flex-shrink: 0;
}

.catalog-search-bar input {
  flex: 1;
  font-size: 0.95rem;
  color: var(--text-primary);
}

.btn-clear-input {
  cursor: pointer;
  color: var(--text-muted);
}
.btn-clear-input:hover {
  color: var(--text-primary);
}

/* --- Category Filter Bar --- */
.category-filter-bar {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  overflow-x: auto;
  padding-bottom: 0.5rem;
  margin-bottom: 2.5rem;
  scrollbar-width: none;
}

.category-filter-bar::-webkit-scrollbar {
  display: none;
}

.cat-pill-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.6rem 1.15rem;
  background: var(--bg-card);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-full);
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text-secondary);
  cursor: pointer;
  transition: all var(--transition-fast);
  white-space: nowrap;
  backdrop-filter: blur(10px);
}

.cat-pill-btn i {
  width: 1rem;
  height: 1rem;
}

.cat-pill-btn:hover {
  color: var(--text-primary);
  border-color: var(--border-focus);
  background: var(--bg-card-hover);
}

.cat-pill-btn.active {
  background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
  color: #ffffff;
  border-color: transparent;
  box-shadow: 0 4px 15px var(--accent-glow);
}

/* --- Courses Grid & Cards --- */
.courses-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
  gap: 2rem;
}

.course-card {
  background: var(--bg-card);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-lg);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  backdrop-filter: blur(16px);
  transition: all var(--transition-smooth);
  box-shadow: var(--shadow-sm);
}

.course-card:hover {
  transform: translateY(-5px);
  border-color: rgba(99, 102, 241, 0.4);
  box-shadow: 0 16px 35px -10px rgba(0, 0, 0, 0.4), 0 0 25px -5px var(--accent-glow);
}

.card-thumb-wrap {
  position: relative;
  width: 100%;
  height: 190px;
  overflow: hidden;
}

.card-thumb {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s cubic-bezier(0.16, 1, 0.3, 1);
}

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

.card-badge {
  position: absolute;
  top: 1rem;
  left: 1rem;
  padding: 0.3rem 0.75rem;
  border-radius: var(--radius-full);
  background: rgba(8, 12, 20, 0.85);
  backdrop-filter: blur(8px);
  border: 1px solid var(--border-glass);
  color: #ffffff;
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.card-category-tag {
  position: absolute;
  bottom: 0.85rem;
  left: 1rem;
  padding: 0.25rem 0.65rem;
  border-radius: var(--radius-xs);
  background: rgba(99, 102, 241, 0.9);
  color: #ffffff;
  font-size: 0.72rem;
  font-weight: 700;
  backdrop-filter: blur(4px);
}

.card-body {
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  flex: 1;
}

.card-meta-top {
  display: flex;
  align-items: center;
  gap: 1rem;
  font-size: 0.82rem;
  color: var(--text-muted);
  margin-bottom: 0.85rem;
}

.card-meta-top span {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
}

.card-meta-top i {
  width: 0.95rem;
  height: 0.95rem;
}

.card-rating i {
  color: #f59e0b;
  fill: #f59e0b;
}

.card-title {
  font-size: 1.2rem;
  font-weight: 700;
  line-height: 1.35;
  margin-bottom: 0.6rem;
  transition: color var(--transition-fast);
}

.card-title a:hover {
  color: var(--accent-primary);
}

.card-desc {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.55;
  margin-bottom: 1.25rem;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.card-progress-wrapper {
  margin-bottom: 1.25rem;
}

.progress-bar-bg {
  width: 100%;
  height: 6px;
  background: var(--bg-surface-elevated);
  border-radius: var(--radius-full);
  overflow: hidden;
}

.progress-bar-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--accent-primary), var(--accent-secondary));
  border-radius: var(--radius-full);
}

.progress-subtext {
  font-size: 0.75rem;
  color: var(--text-muted);
  margin-top: 0.35rem;
}

.card-footer-action {
  margin-top: auto;
  padding-top: 1rem;
  border-top: 1px solid var(--border-subtle);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.instructor-mini {
  display: flex;
  align-items: center;
  gap: 0.6rem;
}

.inst-avatar {
  width: 1.8rem;
  height: 1.8rem;
  border-radius: var(--radius-full);
  object-fit: cover;
  border: 1px solid var(--border-glass);
}

.inst-avatar-fallback {
  width: 1.8rem;
  height: 1.8rem;
  border-radius: var(--radius-full);
  border: 1px solid var(--border-glass);
  background: linear-gradient(135deg, rgba(99, 102, 241, 0.25), rgba(16, 185, 129, 0.2));
  color: var(--text-primary);
  font-size: 0.65rem;
  font-weight: 700;
  letter-spacing: 0.02em;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.inst-name {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-secondary);
}

.btn-card-enter {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  padding: 0.45rem 0.9rem;
  background: var(--bg-surface-elevated);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-full);
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-primary);
  transition: all var(--transition-fast);
}

.btn-card-enter:hover {
  background: var(--accent-primary);
  color: #ffffff;
  border-color: var(--accent-primary);
  box-shadow: 0 4px 15px var(--accent-glow);
}

.btn-card-enter i {
  width: 0.95rem;
  height: 0.95rem;
}

.no-courses-state {
  grid-column: 1 / -1;
  text-align: center;
  padding: 4rem 1rem;
  background: var(--bg-card);
  border: 1px dashed var(--border-glass);
  border-radius: var(--radius-lg);
  color: var(--text-muted);
}

.no-courses-state i {
  width: 3rem;
  height: 3rem;
  margin-bottom: 0.8rem;
  opacity: 0.5;
}

.no-courses-state h4 {
  font-size: 1.2rem;
  color: var(--text-primary);
  margin-bottom: 0.4rem;
}