/* ============================================================
   COURSES SECTION — Horizontal scroll poster grid
   + Popup mini image slider
   ============================================================ */

/* ── Courses scroll track ──────────────────────────────────── */
.courses-scroll-track {
  display: flex;
  gap: 16px;
  overflow-x: auto;
  padding: 8px 4px 20px;
  scroll-snap-type: x mandatory;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: thin;
  scrollbar-color: rgba(0,229,255,0.3) transparent;
  margin-top: 40px;
}
.courses-scroll-track::-webkit-scrollbar {
  height: 4px;
}
.courses-scroll-track::-webkit-scrollbar-track {
  background: transparent;
}
.courses-scroll-track::-webkit-scrollbar-thumb {
  background: rgba(0,229,255,0.3);
  border-radius: 2px;
}

/* ── Individual course poster card ────────────────────────── */
.course-poster-card {
  flex: 0 0 200px;
  scroll-snap-align: start;
  border-radius: 16px;
  overflow: hidden;
  position: relative;
  cursor: pointer;
  border: 1px solid rgba(255,255,255,0.08);
  transition: transform 0.25s ease, box-shadow 0.25s ease;
  aspect-ratio: 4 / 5;
  background: rgba(5,15,40,0.6);
}
.course-poster-card:hover {
  transform: translateY(-6px) scale(1.02);
  box-shadow: 0 20px 50px rgba(0,0,0,0.5), 0 0 30px rgba(0,229,255,0.15);
  border-color: rgba(0,229,255,0.3);
}
.course-poster-card img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  transition: transform 0.35s ease;
}
.course-poster-card:hover img {
  transform: scale(1.04);
}

/* Name label at bottom */
.course-poster-label {
  position: absolute;
  bottom: 0; left: 0; right: 0;
  padding: 28px 12px 12px;
  background: linear-gradient(to top, rgba(0,0,0,0.85) 0%, transparent 100%);
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 0.82rem;
  color: #fff;
  text-align: center;
  letter-spacing: 0.03em;
}

/* Lightbox overlay for full poster view */
.course-lightbox {
  position: fixed;
  inset: 0;
  z-index: 500;
  background: rgba(0,0,0,0.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s ease;
}
.course-lightbox.open {
  opacity: 1;
  pointer-events: all;
}
.course-lightbox img {
  max-height: 90vh;
  max-width: 90vw;
  border-radius: 16px;
  object-fit: contain;
  box-shadow: 0 40px 100px rgba(0,0,0,0.8);
}
.course-lightbox-close {
  position: absolute;
  top: 20px; right: 24px;
  background: rgba(255,255,255,0.1);
  border: 1px solid rgba(255,255,255,0.2);
  color: #fff;
  font-size: 1.4rem;
  width: 40px; height: 40px;
  border-radius: 50%;
  cursor: pointer;
  display: flex; align-items: center; justify-content: center;
  transition: background 0.2s;
}
.course-lightbox-close:hover {
  background: rgba(255,255,255,0.2);
}
.course-lightbox-name {
  position: absolute;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%);
  background: rgba(0,0,0,0.6);
  color: #fff;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1rem;
  padding: 8px 24px;
  border-radius: 50px;
  white-space: nowrap;
}

/* Popup slider styles moved to popup-carousel.css */

/* ── Course Catalogue (inside Programs section) ────────────── */
.catalogue-wrap {
  margin-top: 60px;
  padding-top: 48px;
  border-top: 1px solid rgba(255,255,255,0.07);
}
.catalogue-header {
  margin-bottom: 28px;
}
.catalogue-tabs {
  display: flex;
  gap: 8px;
  margin-bottom: 28px;
  border-bottom: 1px solid rgba(255,255,255,0.08);
  padding-bottom: 0;
}
.cat-tab {
  background: none;
  border: none;
  border-bottom: 2px solid transparent;
  color: var(--white-60);
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 0.88rem;
  letter-spacing: 0.06em;
  padding: 10px 20px;
  cursor: pointer;
  transition: color 0.2s, border-color 0.2s;
  margin-bottom: -1px;
}
.cat-tab:hover { color: var(--white-80); }
.cat-tab.active {
  color: var(--cyan);
  border-bottom-color: var(--cyan);
}
.cat-panel {
  display: none;
  flex-wrap: wrap;
  gap: 10px;
}
.cat-panel.active { display: flex; }

.cat-chip {
  display: inline-flex;
  align-items: center;
  padding: 8px 16px;
  border-radius: var(--radius-pill);
  background: rgba(255,255,255,0.04);
  border: 1px solid rgba(255,255,255,0.10);
  font-size: 0.82rem;
  color: var(--white-80);
  font-weight: 500;
  transition: background 0.2s, border-color 0.2s, color 0.2s;
  cursor: default;
}
.cat-chip:hover {
  background: rgba(0,229,255,0.08);
  border-color: rgba(0,229,255,0.30);
  color: var(--white);
}

/* ── Responsive ────────────────────────────────────────────── */
@media (max-width: 768px) {
  .course-poster-card { flex: 0 0 160px; }
  .pcs-track { height: 150px; }
  .pcs-slide img { height: 150px; }
}
@media (max-width: 480px) {
  .course-poster-card { flex: 0 0 140px; }
}