:root {
  --ink: #1A1714;
  --ink-soft: #25201B;
  --ink-softer: #2E2823;
  --paper: #F5F0E6;
  --paper-dim: #C9C0B0;
  --paper-faint: #867E70;
  --amber: #D4A574;
  --amber-bright: #E8B981;
  --amber-dim: #8C6F4A;
  --burgundy: #9D5252;
  --forest: #7BA05B;
  --border: #322C26;
  --border-soft: #272220;
  --max-width: 880px;
  --serif: "Iowan Old Style", "Palatino", "Palatino Linotype", Georgia, serif;
  --sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--ink);
  color: var(--paper);
  font-family: var(--serif);
  font-size: 18px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

a {
  color: var(--amber-bright);
  text-decoration: none;
  border-bottom: 1px solid var(--amber-dim);
  transition: color 120ms ease, border-color 120ms ease;
}
a:hover { color: var(--paper); border-color: var(--paper); }

header.site {
  border-bottom: 1px solid var(--border);
  background: var(--ink);
  position: sticky;
  top: 0;
  z-index: 10;
  backdrop-filter: saturate(150%) blur(6px);
}
header.site .inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 14px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}
header.site .brand {
  font-family: var(--sans);
  font-weight: 700;
  letter-spacing: 0.4px;
  color: var(--paper);
  border: 0;
  font-size: 16px;
}
header.site .brand .dot {
  display: inline-block;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--amber);
  margin-right: 9px;
  vertical-align: 2px;
  box-shadow: 0 0 12px var(--amber-dim);
}
header.site nav {
  font-family: var(--sans);
  font-size: 14px;
  display: flex;
  gap: 18px;
  flex-wrap: wrap;
}
header.site nav a { border: 0; color: var(--paper-dim); }
header.site nav a:hover { color: var(--amber-bright); }

main {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 56px 24px 96px;
}

h1, h2, h3, h4 {
  font-family: var(--serif);
  color: var(--paper);
  letter-spacing: -0.01em;
}

h1 {
  font-size: 44px;
  line-height: 1.1;
  margin: 0 0 12px;
  font-weight: 700;
}
h2 {
  font-size: 26px;
  margin: 56px 0 14px;
  padding-top: 10px;
  border-top: 1px solid var(--border);
}
h3 {
  font-size: 19px;
  margin: 28px 0 6px;
  color: var(--amber-bright);
  font-family: var(--sans);
  font-weight: 600;
  letter-spacing: 0.2px;
}
h4 {
  font-size: 16px;
  margin: 20px 0 4px;
  color: var(--paper);
  font-family: var(--sans);
  font-weight: 600;
}

p { margin: 0 0 14px; }

.lede {
  font-size: 22px;
  color: var(--paper-dim);
  margin: 0 0 28px;
  line-height: 1.5;
}

.eyebrow {
  font-family: var(--sans);
  text-transform: uppercase;
  letter-spacing: 1.4px;
  font-size: 12px;
  color: var(--amber);
  margin: 0 0 14px;
  font-weight: 600;
}

ul, ol { padding-left: 22px; margin: 0 0 18px; }
li { margin: 6px 0; }

hr {
  border: 0;
  border-top: 1px solid var(--border);
  margin: 40px 0;
}

.card {
  background: var(--ink-soft);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 22px 24px;
  margin: 18px 0;
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 14px;
  margin: 28px 0;
}
.feature-grid .card { margin: 0; }
.feature-grid h3 { margin-top: 0; }

.btn-row {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  margin: 24px 0 8px;
}

.btn {
  font-family: var(--sans);
  font-weight: 600;
  font-size: 15px;
  padding: 12px 20px;
  border-radius: 999px;
  border: 1px solid var(--amber-dim);
  background: transparent;
  color: var(--amber-bright);
  display: inline-block;
  transition: background 120ms ease, color 120ms ease;
}
.btn:hover { background: var(--amber); color: var(--ink); }
.btn.primary {
  background: var(--amber);
  color: var(--ink);
  border-color: var(--amber);
}
.btn.primary:hover { background: var(--amber-bright); }

.toc {
  font-family: var(--sans);
  font-size: 14px;
  background: var(--ink-soft);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 16px 22px;
  margin: 24px 0 36px;
}
.toc strong {
  display: block;
  color: var(--amber);
  font-weight: 600;
  letter-spacing: 0.6px;
  text-transform: uppercase;
  font-size: 12px;
  margin-bottom: 8px;
}
.toc ul { padding-left: 0; list-style: none; columns: 2; column-gap: 24px; margin: 0; }
.toc li { margin: 4px 0; }
.toc a { border: 0; color: var(--paper-dim); }
.toc a:hover { color: var(--amber-bright); }

.kbd, code {
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  background: var(--ink-softer);
  color: var(--paper);
  border: 1px solid var(--border);
  padding: 2px 7px;
  border-radius: 5px;
  font-size: 0.88em;
}

footer.site {
  border-top: 1px solid var(--border);
  font-family: var(--sans);
  font-size: 13px;
  color: var(--paper-faint);
  padding: 28px 24px 48px;
  text-align: center;
}
footer.site .links {
  display: flex;
  gap: 18px;
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: 10px;
}
footer.site a { border: 0; color: var(--paper-dim); }
footer.site a:hover { color: var(--amber-bright); }

.muted { color: var(--paper-faint); font-size: 14px; font-family: var(--sans); }

.callout {
  border-left: 3px solid var(--amber);
  padding: 4px 0 4px 18px;
  color: var(--paper-dim);
  margin: 22px 0;
  font-style: italic;
}

@media (max-width: 600px) {
  body { font-size: 17px; }
  h1 { font-size: 34px; }
  h2 { font-size: 22px; }
  main { padding: 40px 20px 72px; }
  header.site .inner { flex-direction: column; align-items: flex-start; gap: 10px; padding: 12px 20px; }
  .toc ul { columns: 1; }
}