/* Financial Products in 5 Minutes — shared course styles */

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  /* Brand tokens (--primary, --background, …) come from /assets/brand.css. */
  --ink:     var(--text-primary);
  --paper:   var(--background);
  --cream:   var(--surface-card);
  --rule:    var(--border-neutral);
  --muted:   var(--text-muted);
  /* Diagrams need two series colours: --gold is the main (blue) leg,
     --teal the return leg in a cool cyan that stays distinct from it. */
  --gold:    var(--primary);
  --teal:    #0e7490;
  --mono:    'IBM Plex Mono', monospace;
  --sans:    'IBM Plex Sans', system-ui, sans-serif;
  --serif:   var(--sans);
  --hand:    'Caveat', cursive;
}

body {
  font-family: var(--sans);
  font-weight: 400;
  line-height: 1.7;
}

a { color: inherit; }

/* ---------- masthead ---------- */

.masthead {
  border-bottom: 1px solid var(--rule);
  background: var(--cream);
  padding: 12px 48px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--muted);
  flex-wrap: wrap;
  gap: 8px;
}
.masthead-title { color: var(--primary); font-weight: 500; text-decoration: none; }
.masthead a { text-decoration: none; }
.masthead a:hover { color: var(--primary); }

/* ---------- hero ---------- */

.hero {
  max-width: 720px;
  margin: 0 auto;
  padding: 64px 48px 8px;
  text-align: center;
}
.kicker {
  display: block;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--gold);
  margin-bottom: 22px;
}
.hero h1 {
  font-family: var(--serif);
  font-weight: 700;
  font-size: clamp(2rem, 6vw, 3.1rem);
  line-height: 1.1;
  letter-spacing: -0.03em;
  text-wrap: balance;
  margin: 0 0 8px;
}
.hero .subtitle {
  font-family: var(--serif);
  font-weight: 500;
  color: var(--gold);
  font-size: 1.1rem;
  margin-bottom: 16px;
  display: block;
}
.hero .dek {
  color: var(--muted);
  font-size: 1.05rem;
  font-weight: 300;
  text-wrap: balance;
  max-width: 560px;
  margin-inline: auto;
}

main { max-width: 900px; margin: 0 auto; padding: 0 24px 64px; }

/* ---------- diagram ---------- */

.diagram-wrap {
  margin: 40px 0 8px;
  padding: 28px clamp(12px, 4vw, 36px) 22px;
  background: var(--cream);
  border-width: 1px;
  border-style: solid;
}
.diagram-wrap + .diagram-wrap { margin-top: 20px; }
figure { margin: 0; }
svg.sketch-figure { display: block; width: 100%; height: auto; overflow: visible; }
figcaption {
  margin-top: 18px;
  font-family: var(--mono);
  font-size: 11.5px;
  letter-spacing: 0.02em;
  color: var(--muted);
  text-align: center;
  max-width: 620px;
  margin-inline: auto;
}

/* ---------- narrative ---------- */

.story-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
  margin: 56px 0 40px;
}
@media (max-width: 720px) {
  .story-grid { grid-template-columns: 1fr; gap: 36px; }
}
.story-grid h2 {
  font-family: var(--serif);
  font-weight: 700;
  font-size: 1.15rem;
  margin: 0 0 12px;
}
.story-grid p { margin: 0 0 12px; font-size: 0.95rem; }
.story-grid p:last-child { margin-bottom: 0; }
.story-grid ul { margin: 0; padding-left: 18px; font-size: 0.95rem; }
.story-grid li { margin-bottom: 8px; }
.story-grid li:last-child { margin-bottom: 0; }
.eyebrow-num {
  display: inline-block;
  font-family: var(--mono);
  font-size: 11px;
  color: var(--gold);
  border: 1px solid var(--gold);
  width: 22px;
  height: 22px;
  line-height: 20px;
  text-align: center;
  margin-bottom: 12px;
}

/* ---------- quickfacts ---------- */

.quickfacts {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  padding: 20px 0 8px;
  border-top: 1px solid var(--rule);
}
.chip {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.02em;
  color: var(--muted);
  background: var(--cream);
  border-width: 1px;
  border-style: solid;
  padding: 7px 14px;
}
.chip b { color: var(--ink); font-weight: 500; }

/* ---------- course nav ---------- */

.course-nav {
  margin-top: 48px;
  padding-top: 20px;
  border-top: 1px solid var(--rule);
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
}
.nav-link {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--muted);
  text-decoration: none;
}
.nav-link:hover { color: var(--primary); }
.module-count {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--muted);
  width: 100%;
  order: 3;
  text-align: center;
  padding-top: 12px;
}

footer.site-footer {
  border-top: 1px solid var(--rule);
  padding: 24px 48px;
  text-align: center;
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--muted);
}

/* ---------- course index grid ---------- */

.module-list {
  max-width: 900px;
  margin: 0 auto;
  padding: 8px 24px 96px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
}
@media (max-width: 720px) {
  .module-list { grid-template-columns: 1fr; padding: 8px 20px 72px; }
}
.module-card {
  border-width: 1px;
  border-style: solid;
  background: var(--cream);
  text-decoration: none;
  color: inherit;
  padding: 24px 26px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  transition: transform 0.15s, box-shadow 0.15s, border-color 0.15s;
}
.module-card:hover {
  transform: translateY(-3px);
  border-color: var(--primary);
  box-shadow: 0 10px 24px rgba(15, 23, 42, 0.08);
}
.module-num {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--gold);
}
.module-card h2 {
  font-family: var(--serif);
  font-weight: 700;
  font-size: 1.2rem;
  line-height: 1.3;
  letter-spacing: -0.01em;
}
.module-card p { color: var(--muted); font-size: 0.9rem; }
.module-card .go {
  margin-top: auto;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--primary);
  font-weight: 500;
  padding-top: 6px;
}