/* ============================================================
   ClearCents Design System
   Concept: "The Ledger" — calm, trustworthy, statement-like.
   Deep ink navy + clarity green + a coin-gold signature accent
   that ties directly to the brand name. Thin ledger rules
   replace boxy cards. Serif for authority, sans for readability,
   mono for numbers/labels (the "statement" register).
   ============================================================ */

:root {
  --bg: #F7F8FA;
  --surface: #FFFFFF;
  --ink: #16223D;
  --ink-soft: #5B6478;
  --ink-faint: #8891A3;
  --emerald: #0F6B5C;
  --emerald-dark: #0B5347;
  --gold: #C89B3C;
  --gold-soft: #EFE3C2;
  --border: #E3E6EC;
  --border-strong: #C9CEDA;

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

  --max-width: 1120px;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 17px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--emerald); text-decoration: none; }
a:hover { text-decoration: underline; }
a:focus-visible,
button:focus-visible {
  outline: 2px solid var(--emerald);
  outline-offset: 2px;
}

img { max-width: 100%; display: block; }

.wrap {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

/* ---------- Eyebrow / mono label ---------- */
.eyebrow {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--gold);
  font-weight: 600;
}

/* ---------- Header ---------- */
.site-header {
  border-bottom: 1px solid var(--border);
  background: var(--surface);
  position: sticky;
  top: 0;
  z-index: 20;
}
.site-header .wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}
.logo {
  font-family: var(--font-display);
  font-size: 22px;
  font-weight: 600;
  color: var(--ink);
  letter-spacing: -0.01em;
  display: inline-flex;
  align-items: center;
  gap: 8px;
}
.logo-mark { flex-shrink: 0; }
.logo span { color: var(--gold); }
.logo:hover { text-decoration: none; }

.main-nav ul {
  list-style: none;
  display: flex;
  gap: 26px;
  margin: 0;
  padding: 0;
  flex-wrap: wrap;
}
.main-nav a {
  color: var(--ink-soft);
  font-size: 14.5px;
  font-weight: 500;
}
.main-nav a:hover { color: var(--emerald); text-decoration: none; }
.main-nav a.active {
  color: var(--ink);
  font-weight: 700;
  border-bottom: 2px solid var(--gold);
  padding-bottom: 4px;
}

.nav-toggle {
  display: none;
  background: none;
  border: none;
  padding: 8px;
  cursor: pointer;
  color: var(--ink);
}
.nav-toggle svg { display: block; width: 24px; height: 24px; }

/* ---------- Breadcrumb ---------- */
.breadcrumb {
  font-family: var(--font-mono);
  font-size: 12.5px;
  color: var(--ink-faint);
  padding: 18px 0 0;
}
.breadcrumb a { color: var(--ink-faint); }
.breadcrumb a:hover { color: var(--emerald); }

/* ---------- Hero ---------- */
.hero {
  padding: 76px 0 56px;
  border-bottom: 1px solid var(--border);
}
.hero h1 {
  font-family: var(--font-display);
  font-size: clamp(34px, 5vw, 52px);
  line-height: 1.12;
  letter-spacing: -0.015em;
  margin: 14px 0 18px;
  max-width: 14ch;
}
.hero p.lede {
  font-size: 19px;
  color: var(--ink-soft);
  max-width: 56ch;
  margin: 0 0 28px;
}

.btn {
  display: inline-block;
  font-family: var(--font-body);
  font-weight: 600;
  font-size: 15px;
  padding: 13px 24px;
  border-radius: 3px;
  border: 1px solid transparent;
}
.btn-primary {
  background: var(--emerald);
  color: #fff;
}
.btn-primary:hover { background: var(--emerald-dark); text-decoration: none; }
.btn-outline {
  border-color: var(--border-strong);
  color: var(--ink);
  margin-left: 12px;
}
.btn-outline:hover { border-color: var(--emerald); color: var(--emerald); text-decoration: none; }

/* ---------- Ledger list (topic rows on homepage) ---------- */
.ledger {
  padding: 8px 0 64px;
}
.ledger-item {
  display: flex;
  align-items: center;
  gap: 20px;
  padding: 22px 0;
  border-bottom: 1px solid var(--border);
  transition: padding-left 0.15s ease;
}
.ledger-item:hover { padding-left: 8px; }
.ledger-mark {
  width: 9px;
  height: 9px;
  background: var(--gold);
  flex-shrink: 0;
}
.ledger-item a.ledger-title {
  font-family: var(--font-display);
  font-size: 22px;
  color: var(--ink);
  flex-grow: 1;
}
.ledger-item a.ledger-title:hover { color: var(--emerald); text-decoration: none; }
.ledger-desc {
  color: var(--ink-soft);
  font-size: 15px;
  max-width: 46ch;
  display: none;
}
.ledger-arrow {
  font-family: var(--font-mono);
  color: var(--ink-faint);
  font-size: 18px;
}
.ledger-item:hover .ledger-arrow { color: var(--gold); }

@media (min-width: 760px) {
  .ledger-desc { display: block; }
}

/* ---------- Section heading ---------- */
.section-heading {
  padding-top: 48px;
}
.section-heading h2 {
  font-family: var(--font-display);
  font-size: 26px;
  margin: 6px 0 4px;
}

/* ---------- Article / content pages ---------- */
.content {
  max-width: 760px;
  margin: 0 auto;
  padding: 8px 24px 80px;
}
.content .dateline {
  font-family: var(--font-mono);
  font-size: 12.5px;
  color: var(--ink-faint);
  margin-bottom: 6px;
}
.content h1 {
  font-family: var(--font-display);
  font-size: clamp(30px, 4vw, 42px);
  line-height: 1.15;
  letter-spacing: -0.01em;
  margin: 8px 0 26px;
}
.content h2 {
  font-family: var(--font-display);
  font-size: 26px;
  margin: 48px 0 16px;
  padding-top: 6px;
  border-top: 1px solid var(--border);
}
.content h2:first-of-type { border-top: none; padding-top: 0; }
.content h3 {
  font-family: var(--font-body);
  font-weight: 700;
  font-size: 18.5px;
  margin: 30px 0 12px;
  color: var(--ink);
}
.content p { margin: 0 0 18px; }
.content ul, .content ol {
  margin: 0 0 20px;
  padding-left: 22px;
}
.content li { margin-bottom: 8px; }
.content strong { color: var(--ink); }

.table-wrap {
  width: 100%;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  margin: 8px 0 28px;
}
/* Fix: flex children default to min-width:auto, which blocks shrinking below
   their intrinsic content size and causes calculator input rows to overflow
   on narrow screens even when an explicit width/flex:1 is set. */
input[style*="flex:1"] { min-width: 0; }
.content table {
  width: 100%;
  border-collapse: collapse;
  margin: 0;
  font-size: 15px;
}
.content th, .content td {
  text-align: left;
  padding: 12px 14px;
  border-bottom: 1px solid var(--border);
}
.content th {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--ink-soft);
  border-bottom: 2px solid var(--ink);
}
.content tr:hover td { background: var(--surface); }

.content hr {
  border: none;
  border-top: 1px solid var(--border);
  margin: 44px 0;
}

.content blockquote {
  margin: 0 0 20px;
  padding: 4px 20px;
  border-left: 3px solid var(--gold);
  color: var(--ink-soft);
  font-style: italic;
}

/* FAQ */
.content h2 + h3,
.faq h3 {
  position: relative;
}

/* Related articles grid (button-style cards) */
.related-heading {
  font-family: var(--font-display);
  font-size: 22px;
  margin: 44px 0 18px;
  padding-top: 6px;
  border-top: 1px solid var(--border);
}
.related-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 14px;
  margin: 0 0 32px;
}
.related-card {
  display: block;
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 18px 20px;
  background: var(--surface);
  transition: border-color 0.15s ease, transform 0.15s ease;
}
.related-card:hover {
  border-color: var(--emerald);
  transform: translateY(-2px);
  text-decoration: none;
}
.related-card .related-tag {
  display: block;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--gold);
  margin-bottom: 8px;
}
.related-card .related-title {
  display: block;
  font-family: var(--font-display);
  font-size: 16.5px;
  line-height: 1.3;
  color: var(--ink);
}
.related-card:hover .related-title { color: var(--emerald); }
.related-card .related-arrow {
  display: inline-block;
  margin-top: 10px;
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--ink-faint);
}
.related-card:hover .related-arrow { color: var(--gold); }

/* Hero illustration layout */
.hero-grid {
  display: flex;
  align-items: center;
  gap: 48px;
}
.hero-text { flex: 1 1 auto; }
.hero-art { flex: 0 0 300px; }
.hero-art svg { width: 100%; height: auto; display: block; }
@media (max-width: 760px) {
  .hero-grid { flex-direction: column-reverse; }
  .hero-art { flex: 0 0 auto; max-width: 220px; margin: 0 auto; }
}

/* Section illustration wrapper (used mid-article) */
.section-art { text-align: center; margin: 8px 0 32px; }
.section-art svg { max-width: 260px; width: 100%; height: auto; }

/* CTA box */
.cta-box {
  background: var(--ink);
  color: #fff;
  border-radius: 4px;
  padding: 32px 32px;
  margin: 40px 0 0;
}
.cta-box h2 {
  border: none;
  margin-top: 0;
  color: #fff;
}
.cta-box p { color: #C7CDDB; }
.cta-box a.btn-primary { background: var(--gold); color: var(--ink); font-weight: 700; }
.cta-box a.btn-primary:hover { background: #b78a2f; }

/* Related pages strip */
.related {
  font-size: 14.5px;
  color: var(--ink-soft);
  padding-top: 20px;
  border-top: 1px solid var(--border);
  margin-top: 40px;
}
.related strong { color: var(--ink); }

/* ---------- Footer ---------- */
.site-footer {
  border-top: 1px solid var(--border);
  background: var(--surface);
  margin-top: 40px;
}
.site-footer .wrap {
  padding: 44px 24px 34px;
}
.footer-cols {
  display: grid;
  grid-template-columns: 1.4fr 1fr;
  gap: 32px;
  padding-bottom: 28px;
}
.footer-brand .logo { display: inline-flex; margin-bottom: 10px; }
.footer-brand p {
  color: var(--ink-soft);
  font-size: 14.5px;
  max-width: 42ch;
  margin: 0;
}
.footer-links ul {
  list-style: none;
  margin: 0;
  padding: 0;
  columns: 2;
  gap: 20px;
}
.footer-links li { margin-bottom: 10px; }
.footer-links a { color: var(--ink-soft); font-size: 14px; }
.footer-links a:hover { color: var(--emerald); }
.footer-bottom {
  border-top: 1px solid var(--border);
  padding-top: 20px;
  font-family: var(--font-mono);
  font-size: 12.5px;
  color: var(--ink-faint);
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 10px;
}

/* Calculator input grids: allow columns to shrink instead of overflowing,
   and stack to one column on narrow phones. */
[style*="grid-template-columns:1fr 1fr"] { grid-template-columns: minmax(0, 1fr) minmax(0, 1fr) !important; }
@media (max-width: 420px) {
  [style*="grid-template-columns:1fr 1fr"] { grid-template-columns: 1fr !important; }
}
@media (max-width: 760px) {
  .nav-toggle { display: block; }
  .main-nav ul {
    display: none;
    flex-direction: column;
    gap: 0;
    position: absolute;
    top: 72px;
    left: 0;
    right: 0;
    background: var(--surface);
    border-bottom: 1px solid var(--border);
    padding: 8px 24px 16px;
    box-shadow: 0 8px 16px rgba(22,34,61,.08);
  }
  .main-nav.is-open ul { display: flex; }
  .main-nav ul li { border-top: 1px solid var(--border); }
  .main-nav ul li:first-child { border-top: none; }
  .main-nav a { display: block; padding: 14px 2px; }
  .main-nav a.active { border-bottom: none; border-left: 3px solid var(--gold); padding-left: 12px; }
  .footer-cols { grid-template-columns: 1fr; }
  .footer-links ul { columns: 1; }
}