/* RetireOdds — /learn/ content hub.
   Builds on the design tokens in styles.css (Space Grotesk + JetBrains Mono,
   green accent, fintech-clean). Self-contained component classes so the hub and
   article pages render the same nav / hero / typography without depending on the
   landing page's inline styles. */

.wrap { max-width: 1120px; margin: 0 auto; padding: 0 22px; }
a { color: inherit; }

/* buttons (mirrors landing) */
.btn { display: inline-flex; align-items: center; justify-content: center; gap: 8px; height: 46px; padding: 0 22px; border-radius: 12px; font-size: 15px; font-weight: 600; text-decoration: none; cursor: pointer; border: 1px solid transparent; white-space: nowrap; }
.btn-primary { background: var(--accent); color: #fff; }
.btn-primary:hover { filter: brightness(1.05); }
.btn-ghost { border-color: var(--border); background: var(--panel); color: var(--text); }
.btn-ghost:hover { border-color: var(--accent); }

/* nav (mirrors landing) */
header.nav { position: sticky; top: 0; z-index: 30; background: color-mix(in srgb, var(--bg) 86%, transparent); backdrop-filter: blur(10px); border-bottom: 1px solid var(--border); }
.nav-in { display: flex; align-items: center; justify-content: space-between; height: 64px; }
.brand { display: flex; align-items: center; gap: 10px; font-size: 19px; font-weight: 700; letter-spacing: -0.02em; text-decoration: none; }
.brand .mark { width: 28px; height: 28px; border-radius: 9px; background: var(--accent); display: flex; align-items: center; justify-content: center; }
.nav-actions { display: flex; align-items: center; gap: 12px; }
.nav-actions a.signin { font-size: 14.5px; font-weight: 600; color: var(--text-2); text-decoration: none; white-space: nowrap; }
.nav-actions a.signin:hover { color: var(--text); }

/* breadcrumb */
.crumb { font-family: 'JetBrains Mono', monospace; font-size: 12px; color: var(--text-2); padding: 22px 0 0; letter-spacing: 0.02em; }
.crumb a { color: var(--text-2); text-decoration: none; display: inline-block; padding: 6px 0; }
.crumb a:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; border-radius: 4px; }
.crumb a:hover { color: var(--accent); }
.crumb .sep { margin: 0 8px; color: var(--muted); }

/* hub hero */
.hub-hero { padding: 40px 0 30px; max-width: 720px; }
.eyebrow { display: inline-flex; align-items: center; gap: 8px; font-family: 'JetBrains Mono', monospace; font-size: 11.5px; letter-spacing: 0.08em; text-transform: uppercase; color: var(--accent); background: var(--accent-soft); padding: 7px 13px; border-radius: 999px; }
.hub-hero h1 { font-size: 44px; line-height: 1.06; letter-spacing: -0.03em; margin: 18px 0 0; font-weight: 700; }
.hub-hero p { font-size: 18px; line-height: 1.55; color: var(--text-2); margin: 16px 0 0; }

/* category section */
.cat { padding: 12px 0 8px; }
.cat-head { display: flex; align-items: baseline; gap: 12px; margin: 26px 0 16px; }
.cat-head h2 { font-size: 22px; letter-spacing: -0.02em; margin: 0; }
.cat-head .count { font-family: 'JetBrains Mono', monospace; font-size: 12px; color: var(--muted); }

/* article cards */
.card-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.card { display: flex; flex-direction: column; background: var(--panel); border: 1px solid var(--border); border-radius: 16px; overflow: hidden; text-decoration: none; color: inherit; transition: border-color .15s, transform .15s, box-shadow .15s; }
.card:hover { border-color: var(--accent); transform: translateY(-2px); box-shadow: var(--shadow); }
.card .thumb { aspect-ratio: 16 / 9; background: var(--accent-soft); border-bottom: 1px solid var(--border); line-height: 0; }
.card .thumb svg { width: 100%; height: 100%; display: block; }
.card .body { padding: 16px 18px 18px; display: flex; flex-direction: column; gap: 6px; flex: 1; }
.card .kicker { font-family: 'JetBrains Mono', monospace; font-size: 11px; letter-spacing: 0.04em; text-transform: uppercase; color: var(--accent); }
.card h3 { font-size: 16.5px; line-height: 1.25; margin: 0; letter-spacing: -0.01em; }
.card p { font-size: 13.5px; color: var(--text-2); line-height: 1.5; margin: 0; }
.card .read { margin-top: auto; font-family: 'JetBrains Mono', monospace; font-size: 11px; color: var(--text-2); padding-top: 6px; }

/* article layout */
.article { max-width: 720px; margin: 0 auto; padding: 8px 0 20px; }
.article .a-kicker { font-family: 'JetBrains Mono', monospace; font-size: 11px; letter-spacing: 0.07em; text-transform: uppercase; color: var(--accent); }
.article h1 { font-size: 38px; line-height: 1.1; letter-spacing: -0.03em; margin: 10px 0 0; font-weight: 700; }
.article .lede { font-size: 19px; line-height: 1.55; color: var(--text-2); margin: 16px 0 0; }
.article .meta { font-family: 'JetBrains Mono', monospace; font-size: 11.5px; color: var(--muted); margin-top: 14px; }
.a-hero { margin: 26px 0 8px; border: 1px solid var(--border); border-radius: 18px; overflow: hidden; background: var(--accent-soft); line-height: 0; }
.a-hero svg { width: 100%; height: auto; display: block; }

.article h2 { font-size: 23px; letter-spacing: -0.02em; margin: 34px 0 0; }
.article h3 { font-size: 17px; margin: 24px 0 0; }
.article p { font-size: 16.5px; line-height: 1.65; color: var(--text); margin: 14px 0 0; }
.article ul, .article ol { margin: 14px 0 0; padding-left: 22px; }
.article li { font-size: 16.5px; line-height: 1.6; color: var(--text); margin: 7px 0; }
.article li strong { color: var(--text); }
.article a.inline { color: var(--accent); text-decoration: none; border-bottom: 1px solid color-mix(in srgb, var(--accent) 40%, transparent); }
.article a.inline:hover { border-bottom-color: var(--accent); }

/* callout */
.callout { display: flex; gap: 13px; background: var(--accent-soft); border: 1px solid color-mix(in srgb, var(--accent) 25%, var(--border)); border-radius: 14px; padding: 16px 18px; margin: 24px 0 0; }
.callout .c-ico { flex: none; width: 26px; height: 26px; color: var(--accent); }
.callout .c-body { font-size: 15px; line-height: 1.55; color: var(--text); }
.callout .c-body b { color: var(--accent); }

/* warn callout variant */
.callout.warn { background: color-mix(in srgb, var(--warn) 10%, var(--panel)); border-color: color-mix(in srgb, var(--warn) 35%, var(--border)); }
.callout.warn .c-ico { color: var(--warn); }
.callout.warn .c-body b { color: var(--warn); }

/* key takeaways */
.takeaways { margin: 30px 0 0; border: 1px solid var(--border); border-radius: 16px; padding: 20px 22px; background: var(--panel); }
.takeaways h2 { font-size: 15px; margin: 0 0 4px; text-transform: uppercase; letter-spacing: 0.06em; font-family: 'JetBrains Mono', monospace; color: var(--text-2); }
.takeaways ul { margin: 10px 0 0; padding-left: 0; list-style: none; }
.takeaways li { position: relative; padding-left: 26px; font-size: 15.5px; line-height: 1.5; margin: 9px 0; }
.takeaways li::before { content: ""; position: absolute; left: 0; top: 7px; width: 14px; height: 14px; border-radius: 50%; background: var(--accent-soft); box-shadow: inset 0 0 0 2px var(--accent); }

/* stat row inside articles */
.stat-row { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; margin: 24px 0 0; }
.stat { background: var(--panel); border: 1px solid var(--border); border-radius: 13px; padding: 14px 16px; }
.stat .lbl { font-family: 'JetBrains Mono', monospace; font-size: 11px; letter-spacing: 0.04em; text-transform: uppercase; color: var(--text-2); }
.stat .num { font-family: 'JetBrains Mono', monospace; font-weight: 700; font-size: 22px; margin-top: 6px; color: var(--text); }
.stat .num.accent { color: var(--accent); }

/* related + cta */
.related { margin: 40px 0 0; border-top: 1px solid var(--border); padding-top: 26px; }
.related h2 { font-size: 18px; margin: 0 0 14px; }
.related .card-grid { grid-template-columns: repeat(3, 1fr); }
.cta-band { background: var(--accent); border-radius: 22px; padding: 38px; text-align: center; color: #fff; margin: 40px 0 0; }
.cta-band h2 { font-size: 26px; letter-spacing: -0.02em; margin: 0; }
.cta-band p { margin: 10px 0 22px; font-size: 15.5px; opacity: .92; }
.cta-band .btn-primary { background: #fff; color: var(--accent); }

/* footer */
footer { border-top: 1px solid var(--border); padding: 30px 0; color: var(--text-2); font-size: 13.5px; margin-top: 48px; }
.foot-in { display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; gap: 12px; }
.foot-in a { color: var(--accent); text-decoration: none; }

.disclaimer { max-width: 720px; margin: 26px auto 0; font-size: 12.5px; line-height: 1.5; color: var(--muted); }

@media (max-width: 860px) {
  .card-grid, .related .card-grid, .stat-row { grid-template-columns: 1fr; }
  .hub-hero h1 { font-size: 33px; }
  .article h1 { font-size: 30px; }
  .article .lede { font-size: 17px; }
  .nav-actions a.signin { display: none; }
  .cta-band { padding: 30px 20px; }
}
@media (max-width: 860px) and (min-width: 561px) {
  .card-grid, .related .card-grid { grid-template-columns: 1fr 1fr; }
}

/* ---- product demo pages (/learn/demo-*) ------------------------------------
   Scoped .demo- classes only, so nothing here collides with the article/hub
   styles above. Reuses .article, .a-kicker, h1/.lede/.meta, h2/p/ul, .related,
   .card-grid and .disclaimer as-is. */

/* click-to-play player */
.demo-player { position: relative; width: 100%; aspect-ratio: 16 / 9; margin: 26px 0 8px; border-radius: 18px; overflow: hidden; border: 1px solid var(--border); background: var(--panel); }
.demo-poster { position: absolute; inset: 0; display: flex; align-items: center; justify-content: center; background: radial-gradient(circle at 30% 20%, var(--accent-soft), var(--panel2) 70%); background-size: cover; background-position: top center; background-repeat: no-repeat; }
.demo-poster::before { content: ''; position: absolute; inset: 0; background: linear-gradient(180deg, rgba(10,12,14,.14), rgba(10,12,14,.46)); }
.demo-poster .demo-play-btn { position: relative; z-index: 1; }
.demo-poster .demo-play-icon { color: #fff; filter: drop-shadow(0 3px 10px rgba(0,0,0,.55)); }
.demo-poster .demo-play-label { color: #fff; text-shadow: 0 1px 5px rgba(0,0,0,.6); }
.demo-poster .demo-play-dur { color: rgba(255,255,255,.88); text-shadow: 0 1px 5px rgba(0,0,0,.6); }
.demo-play-btn { display: flex; flex-direction: column; align-items: center; gap: 10px; background: none; border: none; padding: 18px 26px; border-radius: 16px; cursor: pointer; color: var(--text); }
.demo-play-btn:hover .demo-play-icon, .demo-play-btn:focus-visible .demo-play-icon { transform: scale(1.06); }
.demo-play-btn:focus-visible { outline: 2px solid var(--accent); outline-offset: 4px; }
.demo-play-icon { width: 64px; height: 64px; color: var(--accent); transition: transform .15s; }
.demo-play-label { font-family: 'JetBrains Mono', monospace; font-size: 13px; letter-spacing: 0.05em; text-transform: uppercase; color: var(--text); }
.demo-play-dur { font-family: 'JetBrains Mono', monospace; font-size: 12px; color: var(--text-2); }
.demo-iframe { position: absolute; inset: 0; width: 100%; height: 100%; border: 0; display: block; }
.demo-disclaimer { font-size: 12.5px; color: var(--muted); margin: 10px 0 0; }

/* chapters list */
.demo-chapters { list-style: none; margin: 14px 0 0; padding: 0; border: 1px solid var(--border); border-radius: 14px; overflow: hidden; }
.demo-chapters li { display: flex; gap: 14px; align-items: baseline; padding: 11px 16px; border-top: 1px solid var(--border); }
.demo-chapters li:first-child { border-top: none; }
.demo-ch-t { flex: none; width: 44px; font-family: 'JetBrains Mono', monospace; font-size: 12.5px; font-weight: 700; color: var(--accent); }
.demo-ch-text { font-size: 15px; line-height: 1.5; color: var(--text); margin: 0; }

/* FAQ */
.demo-faq { margin: 14px 0 0; display: flex; flex-direction: column; gap: 16px; }
.demo-faq-item h3 { font-size: 16px; margin: 0; }
.demo-faq-item p { font-size: 15px; color: var(--text-2); margin: 6px 0 0; }

/* more-demos strip */
.demo-more-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; }
.demo-more-card { display: flex; flex-direction: column; gap: 4px; padding: 14px 16px; background: var(--panel); border: 1px solid var(--border); border-radius: 14px; text-decoration: none; color: inherit; transition: border-color .15s, transform .15s; }
.demo-more-card:hover { border-color: var(--accent); transform: translateY(-2px); }
.demo-more-dur { font-family: 'JetBrains Mono', monospace; font-size: 11px; color: var(--accent); }
.demo-more-title { font-size: 14.5px; font-weight: 700; letter-spacing: -0.01em; }
.demo-more-hook { font-size: 12.5px; color: var(--text-2); line-height: 1.4; }

/* hub "Product demos" section — reuses .card/.card-grid/.thumb/.body/.kicker/.read */
/* .card .thumb (0,2,0) sets a background shorthand that resets size/position,
   so the cover rules need at least equal specificity to land. */
.demo-hub-thumb { position: relative; display: flex; align-items: center; justify-content: center; }
.card .thumb.demo-hub-thumb { background-size: cover; background-position: top center; background-repeat: no-repeat; }
.demo-hub-thumb::before { content: ''; position: absolute; inset: 0; background: linear-gradient(180deg, rgba(10,12,14,.05), rgba(10,12,14,.34)); }
.demo-hub-play { position: relative; z-index: 1; display: flex; align-items: center; justify-content: center; width: 46px; height: 46px; border-radius: 50%; font-size: 17px; color: #fff; padding-left: 3px; background: color-mix(in srgb, #0a0c0e 46%, transparent); backdrop-filter: blur(2px); box-shadow: 0 2px 10px rgba(0,0,0,.35); }
.demo-hub-dur { position: absolute; right: 10px; bottom: 8px; font-family: 'JetBrains Mono', monospace; font-size: 11px; font-weight: 700; color: var(--text); background: color-mix(in srgb, var(--panel) 80%, transparent); border: 1px solid var(--border); border-radius: 999px; padding: 2px 8px; }

@media (max-width: 860px) {
  .demo-more-grid { grid-template-columns: 1fr; }
  .demo-play-icon { width: 52px; height: 52px; }
}
@media (max-width: 860px) and (min-width: 561px) {
  .demo-hub-grid { grid-template-columns: 1fr 1fr; }
}