.course-sidebar {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

@media (min-width: 992px) {
  .course-sidebar {
    position: sticky;
    top: 1.5rem;
  }
}

.course-sidebar-card {
  background: #fff;
  border: 1px solid #e2e8f0;
  border-radius: 1rem;
  padding: 1.25rem 1.35rem;
  box-shadow: 0 10px 28px rgba(15, 23, 42, 0.06);
}

.course-sidebar-title {
  font-size: 0.95rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: 1rem;
  color: #0f172a;
}

.course-sidebar-search .form-control {
  border: 1px solid #e2e8f0;
  border-right: 0;
  min-height: 44px;
}

.course-sidebar-search-btn {
  background: var(--site-accent, #4f46e5);
  color: #fff;
  border: 1px solid var(--site-accent, #4f46e5);
  min-width: 48px;
}

.course-sidebar-search-btn:hover {
  background: color-mix(in srgb, var(--site-accent, #4f46e5) 85%, black);
  color: #fff;
}

.course-sidebar-list {
  list-style: none;
  padding: 0;
  margin: 0;
}

.course-sidebar-list-item a {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  padding: 0.55rem 0.65rem;
  border-radius: 0.5rem;
  color: #334155;
  text-decoration: none;
  transition: background 0.15s ease, color 0.15s ease;
}

.course-sidebar-list-item a:hover {
  background: color-mix(in srgb, var(--site-accent, #4f46e5) 10%, white);
  color: var(--site-accent, #4f46e5);
}

.course-sidebar-list-item.is-active a {
  background: color-mix(in srgb, var(--site-accent, #4f46e5) 14%, white);
  color: var(--site-accent, #4f46e5);
  font-weight: 600;
}

.course-sidebar-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 1.75rem;
  padding: 0.15rem 0.45rem;
  border-radius: 999px;
  font-size: 0.75rem;
  font-weight: 700;
  background: #f1f5f9;
  color: #475569;
}

.course-sidebar-list-item.is-active .course-sidebar-badge {
  background: var(--site-accent, #4f46e5);
  color: #fff;
}

.course-sidebar-latest {
  display: flex;
  gap: 0.85rem;
  align-items: flex-start;
}

.course-sidebar-latest-thumb {
  flex: 0 0 72px;
  border-radius: 0.65rem;
  overflow: hidden;
  box-shadow: 0 4px 12px rgba(15, 23, 42, 0.12);
}

.course-sidebar-latest-thumb img {
  width: 72px;
  height: 72px;
  object-fit: cover;
  display: block;
}

.course-sidebar-latest-body h6 {
  font-size: 0.9rem;
  line-height: 1.35;
  margin-bottom: 0.35rem;
}

.course-sidebar-latest-body h6 a {
  color: #0f172a;
  text-decoration: none;
}

.course-sidebar-latest-body h6 a:hover {
  color: var(--site-accent, #4f46e5);
}

.course-sidebar-tags {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.course-sidebar-tag {
  display: inline-block;
  padding: 0.35rem 0.75rem;
  border-radius: 999px;
  border: 1px solid #e2e8f0;
  font-size: 0.78rem;
  font-weight: 600;
  color: #475569;
  text-decoration: none;
  transition: all 0.15s ease;
}

.course-sidebar-tag:hover,
.course-sidebar-tag.is-active {
  background: var(--site-accent, #4f46e5);
  border-color: var(--site-accent, #4f46e5);
  color: #fff;
}

.course-sidebar-empty {
  color: #94a3b8;
  font-size: 0.9rem;
}

[data-theme="dark"] .course-sidebar-card {
  background: #1e293b;
  border-color: #334155;
}

[data-theme="dark"] .course-sidebar-title,
[data-theme="dark"] .course-sidebar-latest-body h6 a {
  color: #f8fafc;
}

[data-theme="dark"] .course-sidebar-list-item a {
  color: #cbd5e1;
}

[data-theme="dark"] .course-sidebar-search .form-control {
  background: #0f172a;
  border-color: #334155;
  color: #f8fafc;
}

.course-catalog-card {
  background: #fff;
  border: 1px solid #e2e8f0;
  border-radius: 1rem;
  overflow: hidden;
  box-shadow: 0 8px 22px rgba(15, 23, 42, 0.06);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
  display: flex;
  flex-direction: column;
}

.course-catalog-card:hover {
  transform: translateY(-3px);
  box-shadow: 0 14px 32px rgba(15, 23, 42, 0.12);
}

.course-catalog-card-media {
  position: relative;
  display: block;
  aspect-ratio: 16 / 10;
  overflow: hidden;
  background: linear-gradient(145deg, #e0e7ff, #f1f5f9);
}

.course-catalog-card-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.25s ease;
}

.course-catalog-card:hover .course-catalog-card-media img {
  transform: scale(1.04);
}

.course-catalog-card-price {
  position: absolute;
  top: 0.65rem;
  right: 0.65rem;
  background: var(--site-accent, #4f46e5);
  color: #fff;
  font-size: 0.78rem;
  font-weight: 700;
  padding: 0.25rem 0.55rem;
  border-radius: 999px;
}

.course-catalog-card-body {
  padding: 0.9rem 1rem 1rem;
  flex: 1;
  display: flex;
  flex-direction: column;
}

.course-catalog-card-category {
  display: inline-block;
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--site-accent, #4f46e5);
  margin-bottom: 0.35rem;
}

.course-catalog-card-title {
  font-size: 0.95rem;
  line-height: 1.35;
  margin-bottom: 0.4rem;
}

.course-catalog-card-title a {
  color: #0f172a;
  text-decoration: none;
}

.course-catalog-card-title a:hover {
  color: var(--site-accent, #4f46e5);
}

.course-catalog-card-text {
  font-size: 0.82rem;
  color: #64748b;
  margin-bottom: 0.65rem;
  flex: 1;
}

.course-description {
  font-size: 1rem;
  line-height: 1.75;
  color: var(--site-text, #334155);
}

.course-description p:last-child {
  margin-bottom: 0;
}

.course-description p,
.course-description ul,
.course-description ol {
  margin-bottom: 1rem;
}

.course-description img {
  max-width: 100%;
  height: auto;
}

.course-hero-player {
  margin-bottom: 0.5rem;
  outline: none;
}

.course-hero-player:focus-visible .course-hero-player__frame {
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--site-accent, #4f46e5) 45%, transparent);
}

.course-hero-player__frame {
  position: relative;
  width: 100%;
  aspect-ratio: 16 / 9;
  border-radius: 16px;
  overflow: hidden;
  background: linear-gradient(145deg, #0f172a 0%, #1e293b 100%);
  box-shadow: 0 20px 45px rgba(15, 23, 42, 0.18);
  border: 1px solid rgba(148, 163, 184, 0.2);
}

.course-hero-player.is-fullscreen .course-hero-player__frame {
  width: 100vw;
  height: 100vh;
  max-height: none;
  aspect-ratio: auto;
  border-radius: 0;
  border: 0;
}

.course-hero-player__video {
  width: 100%;
  height: 100%;
  display: block;
  object-fit: contain;
  background: #000;
}

.course-hero-player__overlay {
  position: absolute;
  inset: 0;
  z-index: 2;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 0;
  background: linear-gradient(180deg, rgba(15, 23, 42, 0.15) 0%, rgba(15, 23, 42, 0.45) 100%);
  cursor: pointer;
  transition: opacity 0.25s ease, background 0.25s ease;
}

.course-hero-player__overlay.is-hidden {
  opacity: 0;
  pointer-events: none;
}

.course-hero-player__overlay:hover {
  background: linear-gradient(180deg, rgba(15, 23, 42, 0.1) 0%, rgba(15, 23, 42, 0.55) 100%);
}

.course-hero-player__play-icon {
  width: 72px;
  height: 72px;
  border-radius: 50%;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  background: color-mix(in srgb, var(--site-accent, #4f46e5) 88%, white);
  box-shadow: 0 12px 30px rgba(79, 70, 229, 0.45);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.course-hero-player__overlay:hover .course-hero-player__play-icon {
  transform: scale(1.06);
  box-shadow: 0 16px 36px rgba(79, 70, 229, 0.55);
}

.course-hero-player__controls {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 3;
  padding: 0.5rem 0.75rem 0.65rem;
  background: linear-gradient(180deg, transparent 0%, rgba(15, 23, 42, 0.82) 55%, rgba(15, 23, 42, 0.95) 100%);
  transition: opacity 0.25s ease, transform 0.25s ease;
}

.course-hero-player__controls.is-hidden {
  opacity: 0;
  transform: translateY(6px);
  pointer-events: none;
}

.course-hero-player__progress-wrap {
  position: relative;
  height: 6px;
  margin-bottom: 0.55rem;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.18);
  overflow: hidden;
}

.course-hero-player__buffered {
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 0;
  background: rgba(255, 255, 255, 0.28);
  pointer-events: none;
}

.course-hero-player__seek {
  position: absolute;
  inset: 0;
  width: 100%;
  margin: 0;
  appearance: none;
  background: transparent;
  cursor: pointer;
}

.course-hero-player__seek::-webkit-slider-thumb {
  appearance: none;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--site-accent, #4f46e5);
  border: 2px solid #fff;
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.35);
}

.course-hero-player__seek::-moz-range-thumb {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--site-accent, #4f46e5);
  border: 2px solid #fff;
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.35);
}

.course-hero-player__toolbar {
  display: flex;
  align-items: center;
  gap: 0.35rem;
  flex-wrap: wrap;
  color: #f8fafc;
}

.course-hero-player__btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.15rem;
  min-width: 34px;
  height: 34px;
  padding: 0 0.35rem;
  border: 0;
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.08);
  color: #f8fafc;
  cursor: pointer;
  transition: background 0.15s ease, color 0.15s ease;
}

.course-hero-player__btn:hover,
.course-hero-player__btn:focus-visible {
  background: color-mix(in srgb, var(--site-accent, #4f46e5) 35%, rgba(255, 255, 255, 0.12));
  outline: none;
}

.course-hero-player__btn--end {
  margin-left: auto;
}

.course-hero-player__icon--pause,
.course-hero-player__icon--muted,
.course-hero-player__icon--exit-fs {
  display: none;
}

.course-hero-player.is-playing .course-hero-player__icon--play {
  display: none;
}

.course-hero-player.is-playing .course-hero-player__icon--pause {
  display: block;
}

.course-hero-player.is-muted .course-hero-player__icon--volume {
  display: none;
}

.course-hero-player.is-muted .course-hero-player__icon--muted {
  display: block;
}

.course-hero-player.is-fullscreen .course-hero-player__icon--enter-fs {
  display: none;
}

.course-hero-player.is-fullscreen .course-hero-player__icon--exit-fs {
  display: block;
}

.course-hero-player__skip-label {
  font-size: 0.62rem;
  font-weight: 700;
  line-height: 1;
}

.course-hero-player__volume {
  width: 72px;
  accent-color: var(--site-accent, #4f46e5);
}

.course-hero-player__time {
  font-size: 0.78rem;
  font-variant-numeric: tabular-nums;
  min-width: 2.5rem;
}

.course-hero-player__time-sep {
  font-size: 0.78rem;
  opacity: 0.7;
  margin: 0 -0.1rem;
}

.course-hero-player__speed-wrap {
  position: relative;
}

.course-hero-player__speed-toggle {
  min-width: 44px;
  font-size: 0.78rem;
  font-weight: 600;
}

.course-hero-player__speed-menu {
  position: absolute;
  right: 0;
  bottom: calc(100% + 6px);
  display: flex;
  flex-direction: column;
  min-width: 88px;
  padding: 0.25rem;
  border-radius: 10px;
  background: rgba(15, 23, 42, 0.96);
  border: 1px solid rgba(148, 163, 184, 0.25);
  box-shadow: 0 12px 28px rgba(0, 0, 0, 0.35);
}

.course-hero-player__speed-menu[hidden] {
  display: none;
}

.course-hero-player__speed-menu button {
  border: 0;
  border-radius: 6px;
  padding: 0.4rem 0.55rem;
  background: transparent;
  color: #f8fafc;
  text-align: left;
  font-size: 0.8rem;
  cursor: pointer;
}

.course-hero-player__speed-menu button:hover,
.course-hero-player__speed-menu button[aria-selected="true"] {
  background: color-mix(in srgb, var(--site-accent, #4f46e5) 30%, transparent);
}

@media (max-width: 575.98px) {
  .course-hero-player__speed-toggle span {
    font-size: 0.72rem;
  }

  .course-hero-player__volume {
    width: 52px;
  }

  .course-hero-player__skip-label {
    display: none;
  }
}

.course-video-player {
  border-radius: 16px;
  overflow: hidden;
  background: transparent;
  border: 0;
  box-shadow: none;
  padding: 0;
}

.course-video-player .course-hero-player {
  margin-bottom: 0;
}

.course-video-player .course-hero-player__frame {
  box-shadow: 0 12px 28px rgba(15, 23, 42, 0.12);
  border: 1px solid rgba(148, 163, 184, 0.2);
}

.course-catalog-card-link {
  font-size: 0.78rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--site-accent, #4f46e5);
  text-decoration: none;
}

.course-catalog-card-link:hover {
  color: color-mix(in srgb, var(--site-accent, #4f46e5) 80%, black);
}

.course-catalog-card-list {
  flex-direction: row;
  align-items: stretch;
}

.course-catalog-card-list-thumb {
  flex: 0 0 120px;
  display: block;
  overflow: hidden;
  background: #f1f5f9;
}

.course-catalog-card-list-thumb img {
  width: 120px;
  height: 100%;
  min-height: 110px;
  object-fit: cover;
}

.course-catalog-card-list-body {
  padding: 0.85rem 1rem;
  flex: 1;
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.course-catalog-card-list-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  flex-wrap: wrap;
}

.course-catalog-card-price-inline {
  font-weight: 800;
  color: var(--site-accent, #4f46e5);
  font-size: 0.95rem;
}

.fe-page-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 34px;
  height: 34px;
  padding: 0 10px;
  border: 1px solid #d5dae1;
  border-radius: 8px;
  background: #ffffff;
  color: #2f3640;
  font-size: 0.84rem;
  font-weight: 600;
  line-height: 1;
  text-decoration: none;
  transition: all 0.18s ease;
}

.fe-page-btn:hover {
  background: #f2f5f9;
  border-color: #bcc5d1;
  color: #1f2630;
}

.fe-page-btn.is-active {
  background: var(--site-accent, #4f46e5);
  border-color: var(--site-accent, #4f46e5);
  color: #ffffff;
}

.fe-page-nav {
  min-width: 72px;
}

[data-theme="dark"] .course-catalog-card {
  background: #1e293b;
  border-color: #334155;
}

[data-theme="dark"] .course-catalog-card-title a {
  color: #f8fafc;
}

[data-theme="dark"] .fe-page-btn {
  background: #1e293b;
  border-color: #334155;
  color: #e2e8f0;
}

@media (max-width: 575.98px) {
  .course-catalog-card-list {
    flex-direction: column;
  }

  .course-catalog-card-list-thumb {
    flex: 0 0 auto;
  }

  .course-catalog-card-list-thumb img {
    width: 100%;
    min-height: 140px;
  }
}