/* FinStudyHub — shared design system
 * Loaded by every content page (pillar + product deep pages).
 * Homepage (index.html) still uses inline styles for legacy layout.
 */

:root {
  --primary: #0b3d91;
  --primary-dark: #08306b;
  --accent: #ff7a18;
  --accent-deep: #ff5733;
  --teal: #0d9488;
  --gfc: #16a34a;
  --cfc: #dc2626;
  --icwim: #2563eb;
  --iisi: #d97706;
  --violet: #7c3aed;
  --text: #1e293b;
  --heading: #0f172a;
  --muted: #64748b;
  --muted-2: #94a3b8;
  --bg: #f8fafc;
  --card: #ffffff;
  --border: #e2e8f0;
  --border-2: #cbd5e1;
  --note-bg: #eff6ff;
  --note-border: #bfdbfe;
  --tip-bg: #fef3c7;
  --tip-border: #fde68a;
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Inter", "Segoe UI", Roboto, sans-serif;
  color: var(--text);
  background: var(--bg);
  line-height: 1.6;
  font-size: 17px;
}
a { color: var(--primary); text-decoration: none; }
a:hover { text-decoration: underline; }
img { max-width: 100%; height: auto; }

/* ------------------------------ Top nav ---------------------------- */
.site-nav {
  background: var(--card);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 20;
  backdrop-filter: saturate(180%) blur(6px);
  background: rgba(255,255,255,0.9);
}
.site-nav .nav-inner {
  max-width: 1080px;
  margin: 0 auto;
  padding: 12px 22px;
  display: flex;
  align-items: center;
  gap: 24px;
}
.site-nav .brand {
  font-weight: 800;
  font-size: 1.06rem;
  color: var(--primary-dark);
  letter-spacing: -0.02em;
}
.site-nav .brand .dot { color: var(--accent); }
.site-nav .nav-links {
  display: flex;
  gap: 18px;
  margin-left: auto;
  font-size: 0.94rem;
  font-weight: 600;
}
.site-nav .nav-links a { color: var(--muted); }
.site-nav .nav-links a:hover { color: var(--primary); text-decoration: none; }
.site-nav .nav-cta {
  background: var(--primary);
  color: white !important;
  padding: 8px 16px;
  border-radius: 8px;
  font-weight: 700;
  font-size: 0.92rem;
}
.site-nav .nav-cta:hover { background: var(--primary-dark); text-decoration: none; }

@media (max-width: 640px) {
  .site-nav .nav-inner { gap: 12px; padding: 10px 14px; }
  .site-nav .nav-links { gap: 10px; font-size: 0.86rem; }
  .site-nav .nav-links a.hide-mobile { display: none; }
}

/* ------------------------------ Layout ---------------------------- */
.wrap {
  max-width: 880px;
  margin: 0 auto;
  padding: 36px 22px 80px;
}
.wrap-wide {
  max-width: 1080px;
}

/* Breadcrumb */
.crumb {
  font-size: 0.86rem;
  color: var(--muted);
  margin: 0 0 20px;
}
.crumb a { color: var(--muted); }
.crumb a:hover { color: var(--primary); }
.crumb .sep { margin: 0 6px; color: var(--muted-2); }

/* ------------------------------ Hero ------------------------------ */
.hero-narrow {
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
  color: white;
  padding: 44px 40px;
  border-radius: 18px;
  margin-bottom: 28px;
}
.hero-narrow .kicker {
  font-size: 0.78rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: #cbd5e1;
  margin-bottom: 14px;
}
.hero-narrow h1 {
  font-size: 2.25rem;
  line-height: 1.15;
  letter-spacing: -0.02em;
  margin: 0 0 14px;
}
.hero-narrow p.lead {
  font-size: 1.1rem;
  color: #cbd5e1;
  margin: 0;
  max-width: 620px;
}
.hero-narrow .hero-actions {
  margin-top: 22px;
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}
.hero-narrow .btn-primary,
.hero-narrow .btn-ghost {
  display: inline-block;
  padding: 12px 22px;
  border-radius: 10px;
  font-weight: 700;
  font-size: 0.98rem;
  text-decoration: none !important;
}
.hero-narrow .btn-primary {
  background: var(--accent);
  color: white !important;
}
.hero-narrow .btn-primary:hover { background: var(--accent-deep); }
.hero-narrow .btn-ghost {
  background: rgba(255,255,255,0.12);
  color: white !important;
  border: 1px solid rgba(255,255,255,0.25);
}
.hero-narrow .btn-ghost:hover { background: rgba(255,255,255,0.2); }

.hero-narrow.cfc { background: linear-gradient(135deg, #7f1d1d 0%, #450a0a 100%); }
.hero-narrow.gfc { background: linear-gradient(135deg, #14532d 0%, #052e16 100%); }
.hero-narrow.icwim { background: linear-gradient(135deg, #1e40af 0%, #172554 100%); }
.hero-narrow.iisi { background: linear-gradient(135deg, #92400e 0%, #451a03 100%); }
.hero-narrow.frr { background: linear-gradient(135deg, #0f766e 0%, #134e4a 100%); }
.hero-narrow.compliance { background: linear-gradient(135deg, #6d28d9 0%, #3b0764 100%); }
.hero-narrow.cat5 { background: linear-gradient(135deg, #b45309 0%, #451a03 100%); }

/* ------------------------------ Body prose ------------------------ */
h2 {
  font-size: 1.5rem;
  color: var(--heading);
  margin: 42px 0 12px;
  letter-spacing: -0.015em;
  line-height: 1.25;
}
h3 {
  font-size: 1.16rem;
  color: var(--heading);
  margin: 26px 0 8px;
}
p { margin: 0 0 14px; }
ul, ol { margin: 0 0 18px; padding-left: 22px; }
li { margin: 0 0 6px; }
strong, b { color: var(--heading); }
hr {
  border: none;
  border-top: 1px solid var(--border);
  margin: 32px 0;
}

/* Callouts */
.note, .tip {
  background: var(--note-bg);
  border-left: 4px solid var(--note-border);
  padding: 14px 18px;
  border-radius: 6px;
  margin: 18px 0;
  font-size: 0.96rem;
}
.tip {
  background: var(--tip-bg);
  border-left-color: #f59e0b;
}
.note b, .tip b { color: var(--heading); }

/* ------------------------------ Tables ---------------------------- */
.tbl-wrap {
  overflow-x: auto;
  margin: 18px 0 22px;
  border: 1px solid var(--border);
  border-radius: 10px;
}
table.ref {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.94rem;
}
table.ref th,
table.ref td {
  padding: 10px 14px;
  text-align: left;
  border-bottom: 1px solid var(--border);
  vertical-align: top;
}
table.ref th {
  background: #f1f5f9;
  color: var(--heading);
  font-weight: 700;
  font-size: 0.86rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}
table.ref tr:last-child td { border-bottom: none; }
table.ref .live-cell { color: #166534; font-weight: 700; }
table.ref .soon-cell { color: var(--muted-2); }

/* ------------------------------ Product cards ---------------------- */
.mini-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 14px;
  margin: 16px 0 24px;
}
.mini-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 18px 18px 16px;
  display: flex;
  flex-direction: column;
  transition: transform 0.12s, box-shadow 0.12s, border-color 0.12s;
}
.mini-card:hover {
  transform: translateY(-2px);
  box-shadow: 0 10px 22px rgba(15, 23, 42, 0.06);
  border-color: var(--border-2);
  text-decoration: none;
}
.mini-card h4 {
  margin: 0 0 4px;
  color: var(--heading);
  font-size: 1rem;
}
.mini-card .mc-price {
  font-size: 0.9rem;
  color: var(--accent);
  font-weight: 800;
  margin: 0 0 8px;
}
.mini-card p {
  margin: 0;
  color: var(--muted);
  font-size: 0.86rem;
}
.mini-card.pack .mc-price { color: var(--violet); }

/* Inline CTA card */
.cta-card {
  background: linear-gradient(135deg, #0b3d91 0%, #08306b 100%);
  color: white;
  border-radius: 14px;
  padding: 28px 32px;
  margin: 32px 0;
  text-align: center;
}
.cta-card h3 {
  color: white;
  font-size: 1.28rem;
  margin: 0 0 8px;
}
.cta-card p {
  color: #cbd5e1;
  margin: 0 0 18px;
  font-size: 0.98rem;
}
.cta-card .cta-actions {
  display: flex;
  justify-content: center;
  gap: 12px;
  flex-wrap: wrap;
}
.cta-card .cta-actions a {
  display: inline-block;
  padding: 11px 22px;
  border-radius: 10px;
  font-weight: 700;
  text-decoration: none !important;
  font-size: 0.96rem;
}
.cta-card .cta-actions a.primary {
  background: var(--accent);
  color: white !important;
}
.cta-card .cta-actions a.primary:hover { background: var(--accent-deep); }
.cta-card .cta-actions a.ghost {
  background: rgba(255,255,255,0.12);
  color: white !important;
  border: 1px solid rgba(255,255,255,0.25);
}
.cta-card .cta-actions a.ghost:hover { background: rgba(255,255,255,0.2); }

/* ------------------------------ FAQ ------------------------------- */
.faq details {
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 14px 18px;
  margin: 10px 0;
  background: var(--card);
}
.faq details[open] { border-color: var(--border-2); }
.faq summary {
  font-weight: 700;
  cursor: pointer;
  color: var(--heading);
  list-style: none;
  padding-right: 20px;
  position: relative;
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after {
  content: "+";
  position: absolute;
  right: 0;
  top: -2px;
  font-size: 1.4rem;
  color: var(--muted);
  font-weight: 400;
}
.faq details[open] summary::after { content: "−"; }
.faq details > *:not(summary) { margin-top: 10px; }

/* ------------------------------ Footer ---------------------------- */
.site-foot {
  border-top: 1px solid var(--border);
  padding: 32px 22px 40px;
  color: var(--muted);
  font-size: 0.9rem;
  text-align: center;
  margin-top: 40px;
}
.site-foot .foot-links {
  margin: 0 0 10px;
}
.site-foot .foot-links a {
  color: var(--muted);
  margin: 0 8px;
}
.site-foot .foot-links a:hover { color: var(--primary); }

/* ------------------------------ Responsive ------------------------ */
@media (max-width: 640px) {
  body { font-size: 16px; }
  .wrap { padding: 22px 14px 50px; }
  .hero-narrow { padding: 32px 22px; border-radius: 12px; }
  .hero-narrow h1 { font-size: 1.7rem; }
  .hero-narrow p.lead { font-size: 1rem; }
  h2 { font-size: 1.3rem; margin: 30px 0 10px; }
  .cta-card { padding: 22px 20px; }
}