/* ============================================================
   IBFin Academy — design tokens
   Concept: a bank passbook / policy ledger. Ledger-ruled pages,
   a rubber-stamp seal for chapter numbers, dual accent colours
   that separate the Banking track (navy) from the Insurance
   track (green) throughout the whole site.
   ============================================================ */
:root {
  --color-paper: #F7F5EE;
  --color-paper-raised: #FFFFFF;
  --color-ink: #1C2230;
  --color-ink-soft: #4B5262;
  --color-rule: #DAD4C0;
  --color-navy: #16233F;
  --color-navy-soft: #EDF0F6;
  --color-green: #1F6F54;
  --color-green-soft: #E8F2EC;
  --color-gold: #A6782B;
  --color-gold-soft: #F3E9D4;
  --color-danger: #8C3A2B;

  --font-display: "Source Serif 4", Georgia, "Times New Roman", serif;
  --font-body: "IBM Plex Sans", -apple-system, Segoe UI, sans-serif;
  --font-mono: "IBM Plex Mono", "SFMono-Regular", Consolas, monospace;

  --radius-sm: 2px;
  --radius-md: 4px;
  --shadow-card: 0 1px 0 var(--color-rule), 0 8px 24px -18px rgba(28,34,48,.45);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--color-paper);
  color: var(--color-ink);
  font-family: var(--font-body);
  line-height: 1.6;
}
a { color: inherit; }
img { max-width: 100%; }

.container { max-width: 1080px; margin: 0 auto; padding: 0 24px; }

/* ---------- Header / Nav ---------- */
header.site-header {
  border-bottom: 1px solid var(--color-rule);
  background: var(--color-paper-raised);
  position: sticky; top: 0; z-index: 50;
}
.site-header .bar {
  display: flex; align-items: center; justify-content: space-between;
  padding: 14px 24px; max-width: 1080px; margin: 0 auto;
}
.brand { display: flex; align-items: center; gap: 10px; text-decoration: none; color: var(--color-ink); }
.brand img { height: 28px; width: auto; }
.brand .name { font-family: var(--font-display); font-weight: 600; font-size: 1.15rem; letter-spacing: .01em; }
nav.primary-nav ul { list-style: none; display: flex; gap: 28px; margin: 0; padding: 0; }
nav.primary-nav a {
  text-decoration: none; font-size: .92rem; letter-spacing: .02em;
  color: var(--color-ink-soft); font-weight: 500;
  border-bottom: 2px solid transparent; padding-bottom: 3px;
}
nav.primary-nav a:hover, nav.primary-nav a.active { color: var(--color-ink); border-bottom-color: var(--color-gold); }

/* ---------- Announcement bar ---------- */
.announcement {
  background: var(--color-navy); color: #fff;
  font-family: var(--font-mono); font-size: .82rem;
  padding: 8px 24px; display: flex; align-items: center; justify-content: center;
  gap: 12px; text-align: center;
}
.announcement a { color: var(--color-gold-soft); text-decoration: underline; }
.announcement .dismiss { cursor: pointer; opacity: .7; border: none; background: none; color: #fff; font-size: 1rem; }

/* ---------- Hero ---------- */
.hero { padding: 72px 0 48px; }
.hero .eyebrow {
  font-family: var(--font-mono); font-size: .78rem; letter-spacing: .12em;
  text-transform: uppercase; color: var(--color-gold); margin-bottom: 14px;
}
.hero h1 {
  font-family: var(--font-display); font-size: clamp(2.2rem, 4.5vw, 3.4rem);
  line-height: 1.08; margin: 0 0 18px; max-width: 14ch;
}
.hero p.lede { font-size: 1.1rem; color: var(--color-ink-soft); max-width: 56ch; margin: 0 0 28px; }

/* ---------- Track cards ---------- */
.track-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; margin: 40px 0; }
@media (max-width: 720px) { .track-grid { grid-template-columns: 1fr; } }

.track-card {
  border: 1px solid var(--color-rule); border-radius: var(--radius-md);
  background: var(--color-paper-raised); padding: 28px; text-decoration: none; color: var(--color-ink);
  box-shadow: var(--shadow-card); display: block; transition: transform .15s ease;
}
.track-card:hover { transform: translateY(-2px); }
.track-card.navy { border-top: 4px solid var(--color-navy); }
.track-card.green { border-top: 4px solid var(--color-green); }
.track-card .label { font-family: var(--font-mono); font-size: .75rem; letter-spacing: .08em; text-transform: uppercase; color: var(--color-ink-soft); }
.track-card h3 { font-family: var(--font-display); font-size: 1.5rem; margin: 8px 0 10px; }
.track-card p { color: var(--color-ink-soft); margin: 0 0 14px; font-size: .95rem; }
.track-card .count { font-family: var(--font-mono); font-size: .85rem; color: var(--color-gold); }

/* ---------- Seal (signature element): rubber-stamp chapter numbers ---------- */
.seal {
  display: inline-flex; align-items: center; justify-content: center;
  width: 56px; height: 56px; border-radius: 50%;
  border: 2px solid currentColor; font-family: var(--font-mono);
  font-weight: 700; font-size: 1rem; transform: rotate(-7deg);
  flex-shrink: 0;
}
.seal.navy { color: var(--color-navy); }
.seal.green { color: var(--color-green); }

/* ---------- Chapter / topic list ---------- */
.chapter-row {
  display: flex; align-items: center; gap: 18px;
  padding: 18px 0; border-bottom: 1px solid var(--color-rule);
  text-decoration: none; color: var(--color-ink);
}
.chapter-row:last-child { border-bottom: none; }
.chapter-row .meta { flex: 1; }
.chapter-row h4 { font-family: var(--font-display); font-size: 1.15rem; margin: 0 0 4px; }
.chapter-row .topics-count { font-size: .85rem; color: var(--color-ink-soft); font-family: var(--font-mono); }

/* ---------- Chapter reader layout ---------- */
.reader-layout { display: grid; grid-template-columns: 260px 1fr; gap: 40px; padding: 32px 0 80px; }
@media (max-width: 860px) { .reader-layout { grid-template-columns: 1fr; } }
.reader-sidebar { border-right: 1px solid var(--color-rule); padding-right: 24px; }
.reader-sidebar h5 { font-family: var(--font-mono); font-size: .75rem; text-transform: uppercase; letter-spacing: .08em; color: var(--color-ink-soft); margin: 0 0 12px; }
.reader-sidebar ul { list-style: none; padding: 0; margin: 0 0 24px; }
.reader-sidebar li a {
  display: block; padding: 8px 10px; border-radius: var(--radius-sm);
  text-decoration: none; color: var(--color-ink-soft); font-size: .92rem;
}
.reader-sidebar li a.active { background: var(--color-navy-soft); color: var(--color-navy); font-weight: 600; }
.reader-sidebar.green li a.active { background: var(--color-green-soft); color: var(--color-green); }

.reader-content h1 { font-family: var(--font-display); font-size: 2rem; margin-top: 0; }
.reader-content h2 { font-family: var(--font-display); font-size: 1.3rem; margin-top: 2em; border-top: 1px solid var(--color-rule); padding-top: 1em; }
.reader-content pre { background: var(--color-ink); color: var(--color-paper); padding: 16px; border-radius: var(--radius-md); overflow-x: auto; font-family: var(--font-mono); font-size: .82rem; }
.reader-content code { font-family: var(--font-mono); background: var(--color-navy-soft); padding: 2px 5px; border-radius: 3px; }
.reader-content strong { color: var(--color-ink); }

/* ---------- Flow diagrams (replace ASCII art with real layout) ---------- */
.flow-diagram {
  display: flex; flex-wrap: wrap; align-items: stretch; gap: 4px;
  background: var(--color-ink); color: var(--color-paper);
  padding: 24px; border-radius: var(--radius-md); margin: 1.4em 0 .6em;
}
.flow-diagram .flow-stage { flex: 1 1 160px; min-width: 150px; display: flex; flex-direction: column; }
.flow-diagram .flow-label {
  font-family: var(--font-mono); font-size: .7rem; text-transform: uppercase;
  letter-spacing: .07em; color: var(--color-gold-soft); margin-bottom: 8px;
}
.flow-diagram .flow-box {
  background: rgba(255,255,255,.06); border: 1px solid rgba(255,255,255,.16);
  border-radius: var(--radius-sm); padding: 12px 14px; font-size: .84rem;
  line-height: 1.45; flex: 1;
}
.flow-diagram .flow-arrow {
  display: flex; align-items: center; justify-content: center;
  font-size: 1.3rem; color: var(--color-gold); padding: 0 6px; flex: 0 0 auto;
}
.flow-diagram.flow-diagram--tree { flex-direction: column; align-items: stretch; }
.flow-diagram .flow-root {
  align-self: center; font-family: var(--font-mono); font-size: .85rem;
  background: rgba(255,255,255,.08); border: 1px solid rgba(255,255,255,.22);
  padding: 10px 20px; border-radius: var(--radius-sm); margin-bottom: 18px;
}
.flow-diagram .flow-branches { display: flex; flex-wrap: wrap; gap: 14px; width: 100%; }
.flow-note { font-size: .85rem; color: var(--color-ink-soft); font-style: italic; margin: .4em 0 1.4em; }

@media (max-width: 640px) {
  .flow-diagram { flex-direction: column; }
  .flow-diagram .flow-arrow { transform: rotate(90deg); padding: 4px 0; }
}

/* ---------- Footer ---------- */
footer.site-footer { border-top: 1px solid var(--color-rule); margin-top: 60px; padding: 40px 0 30px; }
.footer-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); gap: 32px; }
.footer-grid h5 { font-family: var(--font-mono); font-size: .75rem; text-transform: uppercase; letter-spacing: .08em; color: var(--color-ink-soft); margin: 0 0 12px; }
.footer-grid ul { list-style: none; padding: 0; margin: 0; }
.footer-grid li { margin-bottom: 8px; }
.footer-grid a { text-decoration: none; color: var(--color-ink-soft); font-size: .9rem; }
.footer-grid a:hover { color: var(--color-ink); }
.footer-bottom { margin-top: 32px; padding-top: 20px; border-top: 1px solid var(--color-rule); font-size: .82rem; color: var(--color-ink-soft); font-family: var(--font-mono); }

/* ---------- Consent banner ---------- */
.consent-banner {
  position: fixed; left: 0; right: 0; bottom: 0; z-index: 100;
  background: var(--color-navy); color: #fff; padding: 18px 24px;
  display: flex; flex-wrap: wrap; gap: 16px; align-items: center; justify-content: space-between;
}
.consent-banner p { margin: 0; font-size: .88rem; max-width: 60ch; }
.consent-banner a { color: var(--color-gold-soft); }
.consent-actions { display: flex; gap: 10px; }
.btn { font-family: var(--font-mono); font-size: .82rem; padding: 9px 16px; border-radius: var(--radius-sm); border: 1px solid transparent; cursor: pointer; }
.btn-primary { background: var(--color-gold); color: var(--color-ink); }
.btn-ghost { background: transparent; border-color: rgba(255,255,255,.4); color: #fff; }

.skip-link { position: absolute; left: -999px; top: 0; background: var(--color-gold); color: var(--color-ink); padding: 10px 14px; z-index: 200; }
.skip-link:focus { left: 12px; top: 12px; }
:focus-visible { outline: 2px solid var(--color-gold); outline-offset: 2px; }