/* The course: /learn and /learn/<slug> (2026-11-07). Uses the portal.css tokens. */
.learn-shell { max-width: 960px; margin: 0 auto; padding: 48px 24px 96px; color: var(--text-secondary); line-height: 1.7; }
.learn-shell h1 { color: var(--text); margin: 4px 0 12px; }
.learn-shell h2 { color: var(--text); margin: 40px 0 12px; }
.learn-shell h3 { color: var(--text); margin: 24px 0 6px; font-size: 18px; }
.learn-head p { max-width: 680px; }
.learn-list { list-style: none; margin: 32px 0; padding: 0; display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: 24px; }
.learn-card a { display: flex; flex-direction: column; height: 100%; text-decoration: none; color: inherit; border: 1px solid var(--border); border-radius: 12px; overflow: hidden; background: var(--bg); transition: box-shadow 0.15s, border-color 0.15s; }
.learn-card a:hover { border-color: var(--accent); box-shadow: 0 8px 24px rgba(15, 23, 42, 0.10); }
.learn-card img { display: block; width: 100%; height: auto; aspect-ratio: 16/9; background: #0f172a; }
.learn-card-text { display: flex; flex-direction: column; gap: 4px; padding: 14px 16px 16px; }
.learn-card-n { font-size: 13px; color: var(--text-muted); }
.learn-card-title { font-weight: 600; color: var(--text); font-size: 17px; }
.learn-card-summary { font-size: 14px; }
.learn-for { display: inline-block; margin-top: 4px; font-size: 13px; font-weight: 600; color: var(--accent-dark); }
.learn-lead { font-size: 17px; }
.learn-lead .learn-for { margin-left: 8px; }
.learn-video { display: block; width: 100%; height: auto; aspect-ratio: 16/9; background: #0f172a; border-radius: 12px; box-shadow: 0 24px 60px rgba(15, 23, 42, 0.22); margin-top: 20px; }
.learn-credit { font-size: 12px; color: var(--text-muted); margin: 10px 0 24px; }
.learn-credit a { color: inherit; }
.learn-sub { font-size: 13px; font-weight: 700; text-transform: uppercase; letter-spacing: 0.06em; color: var(--text-muted); margin: 0 0 8px; }
.learn-chapters ol { list-style: none; margin: 0 0 24px; padding: 0; display: flex; flex-wrap: wrap; gap: 8px; }
.learn-chapter { font: inherit; font-size: 14px; padding: 6px 12px; border: 1px solid var(--border); border-radius: 999px; background: var(--bg); color: var(--text); cursor: pointer; }
.learn-chapter:hover, .learn-chapter:focus-visible { border-color: var(--accent); background: var(--accent-subtle); }
.learn-len { font-size: 13px; color: var(--text-muted); }
.learn-read ul { margin: 0 0 24px; padding-left: 20px; list-style: disc; }
.learn-read a, .learn-more a, .learn-transcript a { color: var(--accent-dark); font-weight: 600; text-decoration: underline; }
.learn-pager { display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap; padding: 16px 0; border-top: 1px solid var(--border); border-bottom: 1px solid var(--border); }
.learn-pager a { font-weight: 600; text-decoration: none; }
.learn-transcript p { max-width: 720px; }
.learn-cta { margin-top: 40px; }
.learn-more { margin-top: 8px; }
@media (max-width: 640px) { .learn-shell { padding: 32px 16px 64px; } }