.described-demos { max-width: 1100px; margin: 0 auto; padding: 4.5rem 2rem 5rem; }
.described-intro { max-width: 720px; margin: 0 auto 3.5rem; text-align: center; }
.described-eyebrow { font-size: .75rem; font-weight: 600; letter-spacing: .1em; text-transform: uppercase; color: var(--accent-color); }
.described-intro h1 { font-size: clamp(2rem, 5vw, 3.25rem); line-height: 1.15; letter-spacing: -.035em; margin: .8rem 0 1.25rem; }
.described-intro > p:last-of-type { color: var(--text-secondary); font-size: 1.15rem; line-height: 1.65; }
.described-intro nav { display: flex; flex-wrap: wrap; justify-content: center; gap: .75rem; margin-top: 1.75rem; }
.described-intro nav a { display: inline-flex; align-items: center; min-height: 44px; padding: .65rem 1.15rem; border: 1px solid var(--border-color); border-radius: 999px; text-decoration: none; color: inherit; font-size: .875rem; }
.described-intro nav a:hover { background: var(--accent-bg); border-color: var(--accent-color); }
.described-card { margin-bottom: 2.5rem; border: 1px solid var(--border-color); border-radius: 22px; overflow: hidden; scroll-margin-top: 2rem; background: var(--card-bg); box-shadow: 0 12px 36px rgba(0,0,0,.035); }
.described-heading { display: flex; align-items: center; justify-content: space-between; gap: 1rem; padding: 2rem; }
.described-heading h2 { font-size: 1.65rem; line-height: 1.25; letter-spacing: -.025em; margin-top: .4rem; }
.described-duration { flex-shrink: 0; color: var(--text-secondary); font-size: .8rem; }
.described-card video { display: block; width: 100%; aspect-ratio: 1920 / 1260; background: #f7f7fb; }
.described-footer { display: flex; align-items: center; justify-content: space-between; gap: 1.5rem; padding: 1.5rem 2rem; }
.described-footer p { max-width: 55ch; font-size: .9rem; line-height: 1.65; color: var(--text-secondary); }
.described-footer a { flex-shrink: 0; min-height: 44px; display: inline-flex; align-items: center; color: var(--accent-color); font-size: .875rem; text-decoration: none; }
.described-footer a:hover { text-decoration: underline; }
@media (max-width: 600px) {
  .described-demos { padding: 3rem 1.25rem; }
  .described-intro { margin-bottom: 2.5rem; }
  .described-heading { padding: 1.5rem; flex-wrap: wrap; }
  .described-heading h2 { font-size: 1.4rem; }
  .described-footer { padding: 1.25rem 1.5rem; flex-direction: column; align-items: flex-start; gap: .5rem; }
}
@media (prefers-color-scheme: dark) {
  .described-eyebrow, .described-footer a { color: var(--accent-color-dark); }
  .described-card { background: var(--card-bg-dark); border-color: var(--border-color-dark); }
  .described-intro nav a { border-color: var(--border-color-dark); }
  .described-intro > p:last-of-type, .described-duration, .described-footer p { color: var(--text-secondary-dark); }
}