.video-frame {
  position: relative;
  width: 100%;
  margin: 28px 0 12px;
  overflow: hidden;
  border: 1px solid var(--color-line);
  background: #050505;
  aspect-ratio: 16 / 9;
}

.video-frame iframe {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  border: 0;
}

.watch-link {
  margin: 0 0 30px;
  font-size: .92rem;
  color: var(--color-muted);
}

.watch-link a,
.decision-card a,
.cluster-map a {
  color: var(--color-blue);
  font-weight: 700;
}

.decision-card {
  margin: 26px 0;
  padding: 22px 24px;
  border: 1px solid var(--color-line);
  border-left: 4px solid var(--color-blue);
  background: var(--color-bg-soft);
}

.decision-card strong {
  display: block;
  margin-bottom: 8px;
  color: var(--color-ink);
  font-size: .82rem;
  letter-spacing: .12em;
  text-transform: uppercase;
}

.decision-card p {
  margin: 0;
}

.cluster-map {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
  margin: 24px 0 34px;
  padding: 0;
  list-style: none;
}

.cluster-map li {
  margin: 0;
  padding: 18px;
  border: 1px solid var(--color-line);
  background: var(--color-card);
}

.cluster-map span {
  display: block;
  margin-bottom: 7px;
  color: var(--color-faint);
  font-size: .75rem;
  font-weight: 700;
  letter-spacing: .1em;
  text-transform: uppercase;
}

.chapter-list {
  padding-left: 0;
  list-style: none;
}

.chapter-list li {
  display: grid;
  grid-template-columns: 64px minmax(0, 1fr);
  gap: 12px;
  margin: 0;
  padding: 13px 0;
  border-bottom: 1px solid var(--color-line-soft);
}

.chapter-list a {
  color: var(--color-blue);
  font-weight: 800;
}

@media (max-width: 700px) {
  .cluster-map {
    grid-template-columns: 1fr;
  }

  .decision-card,
  .cluster-map li {
    padding: 17px;
  }
}