:root {
  --ink: #1B2430;
  --paper: #FBF9F5;
  --ledger: #2F6E4F;
  --amber: #C8842A;
  --slate: #6B7280;
  --hairline: #D8D3C7;
  --paper-card: #FFFFFF;
}
* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  background: var(--paper);
  color: var(--ink);
  font-family: 'Inter', sans-serif;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}
.mono { font-family: 'IBM Plex Mono', monospace; }
h1, h2, h3 { font-family: 'Fraunces', serif; font-weight: 500; letter-spacing: -0.01em; }
a { color: inherit; }
.wrap { max-width: 1080px; margin: 0 auto; padding: 0 24px; }

/* Nav */
nav {
  position: sticky; top: 0; z-index: 50;
  background: rgba(251, 249, 245, 0.92);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--hairline);
}
nav .wrap { display: flex; align-items: center; justify-content: space-between; height: 72px; }
.logo { font-family: 'Fraunces', serif; font-size: 1.4rem; font-weight: 600; text-decoration: none; }
.logo-mark { color: var(--ledger); }
.nav-links { display: flex; gap: 32px; font-size: 0.95rem; }
.nav-links a { text-decoration: none; color: var(--slate); }
.nav-links a:hover, .nav-links a.active { color: var(--ink); }
.btn {
  display: inline-block;
  padding: 12px 24px;
  border-radius: 4px;
  text-decoration: none;
  font-weight: 600;
  font-size: 0.95rem;
  transition: transform 0.15s ease, box-shadow 0.15s ease;
  border: none;
  cursor: pointer;
}
.btn-primary { background: var(--ledger); color: var(--paper); }
.btn-primary:hover { transform: translateY(-1px); box-shadow: 0 4px 14px rgba(47, 110, 79, 0.28); }
.btn-ghost { background: transparent; border: 1px solid var(--hairline); color: var(--ink); }

/* Hero */
.hero { padding: 88px 0 64px; }
.hero-grid { display: grid; grid-template-columns: 1.1fr 0.9fr; gap: 56px; align-items: center; }
.eyebrow {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 0.8rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--ledger);
  margin-bottom: 16px;
  display: block;
}
.hero h1 { font-size: 3.1rem; line-height: 1.08; margin-bottom: 22px; }
.hero p.lede { font-size: 1.15rem; color: var(--slate); max-width: 480px; margin-bottom: 32px; }
.hero-actions { display: flex; gap: 16px; align-items: center; flex-wrap: wrap; }
.hero-actions .btn-primary { padding: 15px 30px; font-size: 1rem; }
.hero-note { font-size: 0.85rem; color: var(--slate); margin-top: 14px; }

/* Page header (for non-home pages) */
.page-header { padding: 64px 0 40px; border-bottom: 1px solid var(--hairline); }
.page-header h1 { font-size: 2.6rem; margin-bottom: 16px; }
.page-header p.lede { font-size: 1.1rem; color: var(--slate); max-width: 620px; }

/* Receipt card */
.receipt {
  background: var(--paper-card);
  border: 1px solid var(--hairline);
  border-radius: 2px;
  padding: 32px 28px;
  box-shadow: 0 20px 40px -20px rgba(27, 36, 48, 0.18);
  position: relative;
}
.receipt::before {
  content: "";
  position: absolute;
  top: -1px; left: 0; right: 0;
  height: 10px;
  background-image: radial-gradient(circle at 10px 0, transparent 5px, var(--paper) 6px);
  background-size: 20px 10px;
  background-repeat: repeat-x;
}
.receipt-title {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 0.75rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--slate);
  border-bottom: 1px dashed var(--hairline);
  padding-bottom: 14px;
  margin-bottom: 18px;
}
.receipt-row { display: flex; justify-content: space-between; padding: 9px 0; font-family: 'IBM Plex Mono', monospace; font-size: 0.95rem; }
.receipt-row.old .amount { text-decoration: line-through; color: var(--slate); }
.receipt-row.new { border-top: 1px dashed var(--hairline); margin-top: 8px; padding-top: 16px; }
.receipt-row.new .amount { color: var(--ledger); font-weight: 500; font-size: 1.3rem; }
.receipt-row.new .label { font-family: 'Inter', sans-serif; font-weight: 600; }
.receipt-source {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 0.72rem;
  color: var(--slate);
  margin-top: 18px;
  padding-top: 14px;
  border-top: 1px solid var(--hairline);
}

/* Sections */
section { padding: 72px 0; }
.section-head { max-width: 640px; margin-bottom: 48px; }
.section-head .eyebrow { margin-bottom: 12px; }
.section-head h2 { font-size: 2.1rem; margin-bottom: 14px; }
.section-head p { color: var(--slate); font-size: 1.05rem; }

.divider { border: none; border-top: 1px solid var(--hairline); }

/* Modules grid */
.modules { display: grid; grid-template-columns: repeat(2, 1fr); gap: 20px; }
.module-card {
  background: var(--paper-card);
  border: 1px solid var(--hairline);
  border-radius: 4px;
  padding: 28px;
}
.module-card h3 { font-size: 1.25rem; margin-bottom: 10px; }
.module-card p { color: var(--slate); font-size: 0.98rem; }
.module-tag {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 0.72rem;
  color: var(--ledger);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: 10px;
  display: block;
}

/* Feature detail blocks (features.html) */
.feature-block {
  display: grid;
  grid-template-columns: 280px 1fr;
  gap: 48px;
  padding: 48px 0;
  border-top: 1px solid var(--hairline);
}
.feature-block:first-child { border-top: none; }
.feature-block h3 { font-size: 1.5rem; margin-bottom: 12px; }
.feature-block .module-tag { font-size: 0.78rem; }
.feature-block p { color: var(--slate); margin-bottom: 12px; }
.feature-block ul { list-style: none; margin-top: 16px; }
.feature-block li {
  padding: 10px 0 10px 22px;
  border-top: 1px dashed var(--hairline);
  position: relative;
  font-size: 0.96rem;
}
.feature-block li:first-child { border-top: none; }
.feature-block li::before {
  content: "→";
  position: absolute;
  left: 0;
  color: var(--ledger);
  font-family: 'IBM Plex Mono', monospace;
}

/* Comparison table (difference.html) */
.compare-table {
  width: 100%;
  border-collapse: collapse;
  margin-top: 32px;
  background: var(--paper-card);
  border: 1px solid var(--hairline);
}
.compare-table th, .compare-table td {
  padding: 18px 20px;
  text-align: left;
  border-bottom: 1px solid var(--hairline);
  font-size: 0.95rem;
  vertical-align: top;
}
.compare-table th {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--slate);
  background: var(--paper);
}
.compare-table td:first-child { color: var(--slate); font-weight: 500; width: 220px; }
.compare-table .yes { color: var(--ledger); font-weight: 600; }
.compare-table .no { color: var(--amber); font-weight: 600; }
.table-note { font-size: 0.85rem; color: var(--slate); margin-top: 16px; }

/* Differentiator band */
.band {
  background: var(--ink);
  color: var(--paper);
  padding: 80px 0;
}
.band .eyebrow { color: #8FBFA3; }
.band h2 { color: var(--paper); font-size: 2.1rem; margin-bottom: 20px; max-width: 620px; }
.band-list { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; margin-top: 40px; }
.band-item { border-top: 1px solid rgba(251,249,245,0.18); padding-top: 18px; }
.band-item .no {
  font-family: 'IBM Plex Mono', monospace;
  color: #8FBFA3;
  font-size: 0.85rem;
  display: block;
  margin-bottom: 8px;
}
.band-item p { color: rgba(251,249,245,0.75); font-size: 0.95rem; }
.band-item strong { color: var(--paper); font-weight: 600; }

/* Who it's for */
.audience-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.audience-card { padding: 24px 0; }
.audience-card h3 { font-size: 1.1rem; margin-bottom: 8px; }
.audience-card p { color: var(--slate); font-size: 0.95rem; }

/* Final CTA */
.final-cta {
  background: var(--paper-card);
  border: 1px solid var(--hairline);
  border-radius: 6px;
  padding: 56px 48px;
  text-align: center;
}
.final-cta h2 { font-size: 2rem; margin-bottom: 16px; }
.final-cta p { color: var(--slate); max-width: 480px; margin: 0 auto 28px; }

footer {
  border-top: 1px solid var(--hairline);
  padding: 40px 0;
  color: var(--slate);
  font-size: 0.85rem;
}
footer .wrap { display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 12px; }

@media (max-width: 860px) {
  .hero-grid { grid-template-columns: 1fr; }
  .hero h1 { font-size: 2.3rem; }
  .modules { grid-template-columns: 1fr; }
  .band-list { grid-template-columns: 1fr; }
  .audience-grid { grid-template-columns: 1fr; }
  .nav-links { display: none; }
  .feature-block { grid-template-columns: 1fr; gap: 16px; }
  .compare-table { font-size: 0.85rem; }
  .compare-table th, .compare-table td { padding: 12px 10px; }
}

@media (prefers-reduced-motion: reduce) {
  * { transition: none !important; scroll-behavior: auto !important; }
}

a:focus-visible, button:focus-visible {
  outline: 2px solid var(--ledger);
  outline-offset: 2px;
}