.video-hero {
  max-width: 920px;
  margin: 0 auto;
  padding: clamp(3.8rem, 8vw, 6.5rem) 1.5rem 2.5rem;
}

.video-hero h1 { max-width: 860px; }

.video-shell,
.video-groups,
.detail-shell {
  width: min(1120px, calc(100% - 3rem));
  margin: 0 auto;
}

.featured-video {
  padding: clamp(1.2rem, 3vw, 2rem);
  border: 1px solid rgba(121, 176, 255, .28);
  border-radius: 1rem;
  background: linear-gradient(145deg, rgba(121, 176, 255, .08), rgba(16, 21, 31, .9));
}

.featured-copy { max-width: 780px; margin-bottom: 1.25rem; }
.featured-copy h2 { margin: .25rem 0 .65rem; font-size: clamp(1.55rem, 3vw, 2.25rem); }
.featured-copy p { margin: 0; color: #c6cfdd; }
.video-meta { color: var(--muted); font-size: .84rem; font-weight: 700; letter-spacing: .035em; text-transform: uppercase; }

.video-frame {
  overflow: hidden;
  border: 1px solid var(--border);
  border-radius: .85rem;
  background: #020409;
  box-shadow: 0 24px 60px rgba(0, 0, 0, .32);
  aspect-ratio: 16 / 9;
}

.video-frame video { display: block; width: 100%; height: 100%; object-fit: contain; }

.video-groups { padding: 4.5rem 0 6rem; }
.video-group + .video-group { margin-top: 4rem; }
.video-group > h2 { margin: 0 0 .35rem; font-size: clamp(1.55rem, 3vw, 2.15rem); }
.group-intro { max-width: 720px; margin: 0 0 1.35rem; color: var(--muted); }
.video-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 1rem; }

.video-card {
  overflow: hidden;
  border: 1px solid var(--border);
  border-radius: .85rem;
  background: var(--surface);
}

.video-card img { display: block; width: 100%; aspect-ratio: 16 / 9; object-fit: cover; background: #050811; }
.video-card-body { padding: 1.05rem; }
.video-card h3 { margin: .2rem 0 .55rem; font-size: 1.1rem; line-height: 1.28; }
.video-card p { margin: 0 0 .9rem; color: #c6cfdd; font-size: .9rem; line-height: 1.55; }
.video-card a { font-weight: 700; }

.detail-shell { max-width: 920px; padding: 3rem 0 6rem; }
.detail-header { margin-bottom: 1.5rem; }
.detail-header h1 { margin: .35rem 0 .85rem; font-size: clamp(2.2rem, 6vw, 4.35rem); }
.detail-description { max-width: 780px; color: #ccd4e2; font-size: 1.12rem; }
.detail-content { max-width: 780px; margin: 3rem auto 0; }
.detail-content h2 { margin: 2.8rem 0 .75rem; font-size: 1.65rem; }
.transcript { padding: 1.2rem 1.35rem; border-left: 3px solid var(--accent); background: rgba(121, 176, 255, .055); }
.transcript p { margin: 0 0 1rem; color: #c6cfdd; }
.transcript p:last-child { margin-bottom: 0; }
.related-list { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: .7rem 1.3rem; padding: 0; list-style: none; }
.detail-cta { margin-top: 3rem; padding: 1.4rem; border: 1px solid var(--border); border-radius: .85rem; background: var(--surface); }
.detail-cta h2 { margin: 0 0 .5rem; }
.detail-cta p { color: #c6cfdd; }

.resource-video-feature {
  max-width: 1120px;
  margin: 0 auto 1rem;
  padding: 0 1.5rem 4rem;
}
.resource-video-panel { display: grid; grid-template-columns: minmax(260px, .9fr) minmax(0, 1.1fr); gap: 1.6rem; align-items: center; padding: 1.4rem; border: 1px solid rgba(121, 176, 255, .28); border-radius: 1rem; background: rgba(121, 176, 255, .065); }
.resource-video-panel img { display: block; width: 100%; border-radius: .7rem; aspect-ratio: 16 / 9; object-fit: cover; }
.resource-video-panel h2 { margin: .3rem 0 .7rem; }
.resource-video-panel p { color: #c6cfdd; }
.resource-video-actions { display: flex; flex-wrap: wrap; gap: .75rem; }

@media (max-width: 900px) {
  .video-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (max-width: 680px) {
  .video-shell, .video-groups, .detail-shell { width: min(100% - 2rem, 920px); }
  .video-grid, .resource-video-panel, .related-list { grid-template-columns: 1fr; }
  .video-groups { padding-top: 3.5rem; }
}