main {
  display: block;
}

.hero {
  padding: 5rem 0 2rem;
  text-align: center;
}

.hero h1 {
  font-size: clamp(1.9rem, 3.2vw + 1rem, 3rem);
  line-height: 1.1;
  margin: 0 0 0.7rem;
}

.hero p.subhead {
  max-width: 720px;
  margin: 0 auto 1.2rem;
  color: var(--muted);
  font-size: 1.1rem;
}

.cta-group {
  display: inline-flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  margin-top: 0.5rem;
}

.figure {
  max-width: 960px;
  margin: 1.5rem auto 0;
  overflow: hidden;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
}

.figure .video-frame {
  max-width: 900px;
  width: 100%;
  margin: 1.5rem auto 0;
  border-radius: var(--radius-lg);
  box-shadow: 0 4px 24px rgba(37, 111, 164, 0.1);
  overflow: hidden;
}

.figure figcaption {
  padding: 0.75rem 1rem;
  color: var(--muted);
  font-size: 0.95rem;
}

.section {
  padding: 2.5rem 0;
}

.section h2 {
  font-size: clamp(1.4rem, 1.2vw + 1rem, 2rem);
  line-height: 1.25;
  margin: 0 0 0.75rem;
}

.grid {
  display: grid;
  gap: 1rem;
  grid-template-columns: repeat(12, 1fr);
}

.card {
  grid-column: span 12;
  padding: 1rem;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface);
}

details {
  padding: 0.75rem 1rem;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface);
}

details + details {
  margin-top: 0.75rem;
}

summary {
  cursor: pointer;
  font-weight: 600;
}

@media (min-width: 720px) {
  .card.half {
    grid-column: span 6;
  }
}