/* Right Column: Compact Highlighted Carousel */
.hero-carousel-col {
  width: 100%;
  will-change: transform, opacity;
  transition: transform 0.05s linear, opacity 0.05s linear;
}

.carousel-header-title {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: 0.75rem;
}

.carousel-header-spark {
  font-size: 1.15rem;
  line-height: 1;
  filter: drop-shadow(0 0 8px rgba(255, 204, 0, 0.5));
}

.carousel-header-heading {
  margin: 0;
  font-size: 1.18rem;
  font-weight: 600;
  letter-spacing: -0.01em;
  color: #ffffff;
  line-height: 1.2;
}

.carousel-wrapper {
  position: relative;
  border-radius: var(--radius-card);
  overflow: hidden;
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  touch-action: pan-y;
  box-shadow: 
    0 16px 45px -12px rgba(0, 0, 0, 0.95),
    -4px -2px 28px -6px rgba(49, 134, 255, 0.25),
    4px 6px 32px -6px rgba(255, 70, 65, 0.25);
  transition: box-shadow var(--transition-normal), border-color var(--transition-normal);
}

.carousel-wrapper:hover {
  border-color: rgba(49, 134, 255, 0.45);
  box-shadow: 
    0 20px 50px -12px rgba(0, 0, 0, 0.95),
    -6px -4px 34px -4px rgba(49, 134, 255, 0.35),
    6px 8px 38px -4px rgba(255, 70, 65, 0.3);
}

.carousel-track-container {
  overflow: hidden;
  position: relative;
  width: 100%;
  aspect-ratio: 3 / 2;
  touch-action: pan-y;
}

.carousel-track {
  display: flex;
  width: 100%;
  height: 100%;
  list-style: none;
  transition: transform var(--transition-smooth);
}

.carousel-slide {
  position: relative;
  flex: 0 0 100%;
  height: 100%;
  overflow: hidden;
  cursor: pointer;
}

.carousel-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center 25%;
  transition: transform 0.45s ease-out;
}

.carousel-slide:hover .carousel-img {
  transform: scale(1.03);
}

.carousel-slide.active .carousel-img {
  transform: scale(1.04);
}

/* Hover Preview Slot inside Carousel Slide */
.carousel-slide .preview-iframe-slot {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 2;
  overflow: hidden;
  background: #07090c;
  opacity: 0;
  transition: opacity 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

.carousel-slide .preview-iframe-slot::after {
  content: '';
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  z-index: 10;
  pointer-events: none;
  background: transparent;
}

.carousel-slide.is-playing .preview-iframe-slot {
  opacity: 1;
}

.carousel-slide.is-playing .preview-iframe-slot::after {
  pointer-events: auto;
}

/* Portrait Hover Preview iFrame for Highlighted Carousel slides */
.carousel-slide.is-portrait .video-preview-iframe {
  position: absolute;
  top: -46px;
  left: 50%;
  width: 160%;
  height: calc(160% + 56px);
  transform: translateX(-50%) scale(1.72) !important;
  transform-origin: 50% 18% !important;
  border: none;
  pointer-events: none;
}

.carousel-slide.is-playing .carousel-img {
  opacity: 0;
}

.carousel-slide.is-playing .carousel-overlay {
  opacity: 0.25;
  pointer-events: none;
  transition: opacity 0.3s ease;
}

.carousel-slide.is-playing:hover .carousel-overlay {
  opacity: 0.5;
}

.carousel-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(
    180deg,
    rgba(0, 0, 0, 0.02) 0%,
    rgba(0, 0, 0, 0.35) 35%,
    rgba(0, 0, 0, 0.95) 100%
  );
  display: flex;
  align-items: flex-end;
  padding: 1.2rem 1.35rem;
}

.carousel-caption {
  width: 100%;
  max-width: calc(100% - 2.5rem);
}

.carousel-badge-row {
  display: flex;
  align-items: center;
  gap: 0.45rem;
  margin-bottom: 0.35rem;
  flex-wrap: wrap;
}

.carousel-slide-tag {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  background: var(--grad-blue);
  color: #ffffff;
  border: none;
  font-size: 0.68rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  padding: 0.28rem 0.75rem;
  border-radius: var(--radius-pill);
  box-shadow: 0 2px 12px rgba(26, 115, 232, 0.4);
  text-shadow: 0 1px 2px rgba(0, 0, 0, 0.2);
}

.carousel-wave-badge,
.carousel-category-badge {
  background: var(--grad-sentiment, linear-gradient(90deg, #3387ff 0%, #a9a8ff 100%)) !important;
  color: #ffffff !important;
  border: none !important;
  font-size: 0.65rem !important;
  font-weight: 700 !important;
  letter-spacing: 0.05em !important;
  padding: 0.24rem 0.72rem !important;
  border-radius: var(--radius-pill) !important;
  box-shadow: 0 2px 10px rgba(51, 135, 255, 0.4) !important;
  text-transform: uppercase !important;
  display: inline-flex !important;
  align-items: center !important;
}

.carousel-wave-badge[data-category="Teach-back"],
.carousel-wave-badge[data-category="TEACH-BACK"],
.carousel-wave-badge[data-wave="Teach-back"],
.carousel-category-badge[data-category="Teach-back"] {
  background: var(--grad-teachback, linear-gradient(90deg, #0ebc5f 0%, #78c9ff 100%)) !important;
  box-shadow: 0 2px 10px rgba(14, 188, 95, 0.4) !important;
}

.carousel-slide-title {
  font-size: 1.05rem;
  font-weight: 500;
  color: #ffffff;
  line-height: 1.26;
  margin-bottom: 0.25rem;
  letter-spacing: -0.01em;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.carousel-slide-desc {
  font-size: 0.76rem;
  font-weight: 400;
  color: var(--text-secondary);
}

.carousel-play-btn {
  margin-top: 0.65rem;
  padding: 0.45rem 1.05rem;
  font-size: 0.8rem;
  font-weight: 500;
  background: #ffffff;
  color: #000000;
  border: none;
  border-radius: var(--radius-pill);
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  box-shadow: 0 4px 18px rgba(255, 255, 255, 0.2);
  transition: transform var(--transition-fast), box-shadow var(--transition-fast), background var(--transition-fast);
}

.carousel-play-btn:hover {
  transform: translateY(-2px) scale(1.03);
  box-shadow: 0 6px 24px rgba(255, 255, 255, 0.4);
}

.carousel-play-btn .btn-icon {
  width: 14px;
  height: 14px;
}

/* Carousel Controls */
.carousel-nav {
  position: absolute;
  top: 42%;
  transform: translateY(-50%);
  width: 34px;
  height: 34px;
  border-radius: 50%;
  background: rgba(22, 26, 30, 0.85);
  border: 1px solid var(--border-subtle);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  color: #ffffff;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  z-index: 10;
  transition: all var(--transition-fast);
}

.carousel-nav:hover {
  background: var(--bg-surface-secondary);
  border-color: var(--accent-blue);
  box-shadow: 0 0 14px rgba(49, 134, 255, 0.4);
  transform: translateY(-50%) scale(1.08);
}

.carousel-prev { left: 0.65rem; }
.carousel-next { right: 0.65rem; }

.carousel-nav svg {
  width: 16px;
  height: 16px;
}

/* Indicators (Removed: too many videos to display individual bars) & Googlebook Gradient Progress Bar */
.carousel-indicators {
  display: none !important;
}

.carousel-progress-bar {
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 3px;
  background: rgba(255, 255, 255, 0.08);
  z-index: 10;
}

.carousel-progress-fill {
  height: 100%;
  width: 0%;
  background: var(--googlebook-gradient);
  box-shadow: 0 0 12px rgba(49, 134, 255, 0.6);
}