:root {
  --paper: #f3eee4;
  --paper-2: #e8e1d4;
  --ink: #161310;
  --ink-soft: #4a433c;
  --rule: #d4cbbd;
  --copper: #b85c38;
  --copper-ink: #8f3f22;
  --forest: #2f5a45;
  --white: #fcfaf6;
  --shadow: 0 20px 50px rgba(22, 19, 16, 0.08);
  --serif: "Fraunces", "Times New Roman", serif;
  --sans: "IBM Plex Sans", "Helvetica Neue", sans-serif;
  --mono: "IBM Plex Mono", ui-monospace, monospace;
  --max: 1120px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 17px;
  line-height: 1.6;
}

img, svg { max-width: 100%; display: block; }
a { color: var(--copper-ink); }
a:hover { color: var(--ink); }

.wrap { width: min(var(--max), calc(100% - 40px)); margin: 0 auto; }
.narrow { width: min(760px, calc(100% - 40px)); margin: 0 auto; }

.topbar {
  border-bottom: 1px solid var(--rule);
  background: rgba(243, 238, 228, 0.92);
  backdrop-filter: blur(10px);
  position: sticky;
  top: 0;
  z-index: 20;
}
.topbar-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  min-height: 68px;
}
.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  color: var(--ink);
  font-family: var(--serif);
  font-weight: 560;
  letter-spacing: -0.03em;
  font-size: 22px;
}
.mark {
  width: 28px;
  height: 28px;
}
nav { display: flex; gap: 22px; align-items: center; }
nav a {
  text-decoration: none;
  color: var(--ink-soft);
  font-size: 14px;
  letter-spacing: 0.02em;
}
nav a:hover, nav a.active { color: var(--ink); }

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  text-decoration: none;
  border: 1px solid var(--ink);
  background: var(--ink);
  color: var(--paper);
  padding: 11px 16px;
  font-size: 14px;
  letter-spacing: 0.02em;
  cursor: pointer;
  font-family: var(--sans);
}
.btn:hover { background: var(--copper); border-color: var(--copper); color: var(--white); }
.btn.ghost {
  background: transparent;
  color: var(--ink);
}
.btn.ghost:hover { background: var(--ink); color: var(--paper); }
.btn.wide { width: 100%; }

.hero { padding: 72px 0 48px; }
.kicker {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--copper-ink);
  margin: 0 0 18px;
}
h1, h2, h3, h4 { font-family: var(--serif); letter-spacing: -0.035em; line-height: 1.12; margin: 0 0 16px; }
h1 { font-size: clamp(42px, 7vw, 76px); font-weight: 560; }
h2 { font-size: clamp(30px, 4vw, 44px); font-weight: 550; }
h3 { font-size: 26px; font-weight: 550; }
.lede { font-size: 20px; max-width: 640px; color: var(--ink-soft); margin: 0 0 28px; }

.hero-actions { display: flex; gap: 12px; flex-wrap: wrap; margin-bottom: 48px; }

.stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  border-top: 1px solid var(--rule);
  border-bottom: 1px solid var(--rule);
}
.stat { padding: 22px 0; }
.stat + .stat { border-left: 1px solid var(--rule); padding-left: 24px; }
.stat b { display: block; font-family: var(--serif); font-size: 28px; font-weight: 550; }
.stat span { color: var(--ink-soft); font-size: 14px; }

.section { padding: 80px 0; }
.section.alt { background: var(--paper-2); }
.split {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 56px;
  align-items: start;
}

.card, .panel {
  background: var(--white);
  border: 1px solid var(--rule);
  box-shadow: var(--shadow);
}
.panel { padding: 28px; }
.card { padding: 24px; height: 100%; }
.grid-3, .grid-2 { display: grid; gap: 18px; }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-2 { grid-template-columns: 1fr 1fr; }
.card h3 { font-size: 24px; }
.card p { color: var(--ink-soft); margin: 0 0 16px; }
.price { font-family: var(--serif); font-size: 34px; margin: 8px 0 16px; }
.price small { font-size: 16px; color: var(--ink-soft); }

label { display: block; font-size: 13px; margin: 0 0 6px; color: var(--ink-soft); }
input[type="number"], input[type="text"], select, textarea {
  width: 100%;
  border: 1px solid var(--rule);
  background: var(--white);
  color: var(--ink);
  padding: 11px 12px;
  font: 16px var(--sans);
  margin-bottom: 14px;
}
.field-row { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.help { font-size: 12px; color: var(--ink-soft); margin: -8px 0 14px; }

.result {
  background: var(--ink);
  color: var(--paper);
  padding: 24px;
}
.result .label { font-family: var(--mono); font-size: 11px; letter-spacing: 0.12em; text-transform: uppercase; color: #cfc4b4; }
.result .big {
  font-family: var(--serif);
  font-size: clamp(40px, 6vw, 64px);
  letter-spacing: -0.04em;
  margin: 6px 0 18px;
}
.result dl { display: grid; grid-template-columns: 1fr 1fr; gap: 12px 18px; margin: 0; }
.result dt { font-size: 12px; color: #cfc4b4; }
.result dd { margin: 0; font-size: 20px; font-family: var(--serif); }
.note { font-size: 13px; color: var(--ink-soft); }

.article { padding: 56px 0 80px; }
.article p { font-size: 18px; }
.article li { margin-bottom: 8px; }
.article h2 { margin-top: 40px; }
.meta { font-family: var(--mono); font-size: 12px; letter-spacing: 0.08em; text-transform: uppercase; color: var(--ink-soft); }

table { width: 100%; border-collapse: collapse; font-size: 15px; }
th, td { text-align: left; padding: 10px 8px; border-bottom: 1px solid var(--rule); vertical-align: top; }
th { font-size: 12px; letter-spacing: 0.08em; text-transform: uppercase; color: var(--ink-soft); font-weight: 500; }

footer {
  border-top: 1px solid var(--rule);
  padding: 36px 0 48px;
  color: var(--ink-soft);
  font-size: 14px;
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 32px;
}
footer a { text-decoration: none; color: var(--ink-soft); }
footer a:hover { color: var(--ink); }
.tiny { font-size: 12px; }

.toc a { display: block; text-decoration: none; padding: 8px 0; border-bottom: 1px solid var(--rule); color: var(--ink); }
.callout {
  border-left: 3px solid var(--copper);
  padding: 8px 0 8px 16px;
  margin: 24px 0;
  color: var(--ink-soft);
}

@media (max-width: 800px) {
  .split, .grid-3, .grid-2, .stats, .footer-grid, .result dl, .field-row { grid-template-columns: 1fr; }
  .stat + .stat { border-left: 0; padding-left: 0; border-top: 1px solid var(--rule); }
  nav { display: none; }
  .hero { padding-top: 40px; }
}