/* Learn hub and concept pages. Tokens only — no extra JS. */
.learn-body { background: var(--cpk-bg); color: var(--cpk-ink); margin: 0; }
.learn-main { width: min(920px, calc(100% - 48px)); margin: 0 auto; padding: 48px 0 24px; }
.learn-article { width: min(760px, calc(100% - 48px)); }
.learn-crumb { display: flex; flex-wrap: wrap; gap: 8px; align-items: center; font-size: 13px; color: var(--cpk-faint); margin-bottom: 28px; }
.learn-crumb a { color: var(--cpk-muted); text-decoration: none; }
.learn-crumb a:hover { color: var(--cpk-ink); }
.learn-kicker { margin: 0 0 12px; font-size: 12px; letter-spacing: .08em; text-transform: uppercase; color: var(--cpk-muted); font-weight: 650; }
.learn-hero h1 { margin: 0; font-size: clamp(32px, 5vw, 48px); line-height: 1.15; letter-spacing: -.03em; color: var(--cpk-ink); }
.learn-lede { margin: 16px 0 0; font-size: 18px; line-height: 1.65; color: var(--cpk-muted); max-width: 40rem; }
.learn-updated { margin: 14px 0 0; font-size: 13px; color: var(--cpk-faint); }
.learn-cat { margin-top: 48px; }
.learn-cat h2 { margin: 0 0 8px; font-size: 22px; }
.learn-cat-lede { margin: 0 0 18px; color: var(--cpk-muted); }
.learn-card-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 12px; }
.learn-card { display: block; padding: 18px 16px; border: 1px solid var(--cpk-line); border-radius: 14px; background: var(--cpk-surface); color: inherit; text-decoration: none; min-height: 120px; }
.learn-card:hover { border-color: var(--cpk-line-strong); text-decoration: none; }
.learn-card h3 { margin: 0 0 8px; font-size: 16px; line-height: 1.35; color: var(--cpk-ink); }
.learn-card p { margin: 0; font-size: 13px; line-height: 1.55; color: var(--cpk-muted); }
.learn-section { margin-top: 36px; }
.learn-section h2 { margin: 0 0 12px; font-size: 24px; line-height: 1.25; letter-spacing: -.02em; }
.learn-section p, .learn-faq-item div, .learn-lede { color: var(--cpk-muted); }
.learn-section p { margin: 0 0 12px; line-height: 1.75; }
.learn-section ul, .learn-section ol { margin: 0 0 14px; padding-left: 1.2em; color: var(--cpk-muted); }
.learn-section li { margin: .35em 0; line-height: 1.65; }
.learn-section a, .learn-cta a, .learn-related a, .learn-pillar a { color: var(--cpk-link); }
.learn-section strong { color: var(--cpk-ink); font-weight: 650; }
.learn-section code { font-size: .92em; background: var(--cpk-surface-2); border: 1px solid var(--cpk-line); border-radius: 6px; padding: 1px 6px; }
.learn-table-wrap { overflow: auto; border: 1px solid var(--cpk-line); border-radius: 12px; margin: 16px 0 20px; }
.learn-table { width: 100%; border-collapse: collapse; min-width: 480px; font-size: 14px; }
.learn-table th, .learn-table td { text-align: left; vertical-align: top; padding: 12px 14px; border-bottom: 1px solid var(--cpk-line); }
.learn-table th { background: var(--cpk-surface-2); color: var(--cpk-ink); font-weight: 650; }
.learn-table tr:last-child td { border-bottom: 0; }
.learn-note { margin: 16px 0; padding: 14px 16px; border-left: 3px solid var(--cpk-link); background: var(--cpk-surface-2); border-radius: 0 10px 10px 0; color: var(--cpk-muted); }
.learn-cta { margin: 40px 0 8px; padding: 22px; border: 1px solid var(--cpk-line); border-radius: 14px; background: var(--cpk-surface); }
.learn-cta h2 { margin: 0 0 8px; font-size: 18px; }
.learn-cta p { margin: 0 0 12px; color: var(--cpk-muted); }
.learn-cta-links { display: flex; flex-wrap: wrap; gap: 12px 18px; }
.learn-cta a { font-weight: 650; text-decoration: none; }
.learn-cta a:hover { text-decoration: underline; }
.learn-faq { margin-top: 40px; }
.learn-faq h2, .learn-related h2 { margin: 0 0 14px; font-size: 22px; }
.learn-faq-item { border: 1px solid var(--cpk-line); border-radius: 12px; background: var(--cpk-surface); padding: 4px 16px; margin: 0 0 8px; }
.learn-faq-item summary { cursor: pointer; min-height: 48px; display: flex; align-items: center; font-weight: 600; color: var(--cpk-ink); }
.learn-faq-item div { padding: 0 0 14px; line-height: 1.7; color: var(--cpk-muted); }
.learn-related { margin-top: 40px; }
.learn-related ul { margin: 0; padding: 0; list-style: none; display: grid; gap: 8px; }
.learn-related a { display: block; padding: 12px 14px; border: 1px solid var(--cpk-line); border-radius: 10px; background: var(--cpk-surface); text-decoration: none; color: var(--cpk-ink); }
.learn-related a:hover { border-color: var(--cpk-line-strong); }
.learn-pillar { margin-top: 28px; font-size: 14px; color: var(--cpk-muted); }
.learn-rail { margin: 28px 0; padding: 16px 18px; border: 1px solid var(--cpk-line); border-radius: 12px; background: var(--cpk-surface-2); font-size: 14px; color: var(--cpk-muted); }
.learn-rail p { margin: 0; }
.learn-rail p + p { margin-top: 8px; }
.learn-rail a { color: var(--cpk-link); }
.cpk-footer-learn { display: flex; flex-wrap: wrap; gap: 10px 16px; max-width: 420px; }
.cpk-footer-learn .cpk-footer-learn-label { width: 100%; color: var(--cpk-faint); font-size: 10px; letter-spacing: .12em; text-transform: uppercase; }
@media (max-width: 760px) {
  .learn-main, .learn-article { width: calc(100% - 32px); padding-top: 32px; }
  .learn-card-grid { grid-template-columns: 1fr; }
  .learn-hero h1 { font-size: 30px; }
  .learn-lede { font-size: 16px; }
  .learn-crumb { font-size: 12px; }
}
@media (prefers-reduced-motion: reduce) {
  .learn-card, .learn-related a { transition: none; }
}

.learn-code { overflow-x: auto; padding: 14px 16px; border-radius: 10px; background: var(--cpk-surface-2); font-size: 13px; line-height: 1.5; }