:root {
  --ink: #142033;
  --ink-soft: #3c4658;
  --muted: #5c6574;
  --paper: #f4efe6;
  --paper-2: #fffdf8;
  --paper-3: #ebe4d6;
  --line: #d6cdbe;
  --copper: #b35a28;
  --copper-dark: #8c3f16;
  --copper-soft: #f0d8c4;
  --pine: #1c4a38;
  --pine-soft: #d7e8df;
  --danger: #8b1e1e;
  --shadow: 0 18px 50px rgba(20, 32, 51, 0.09);
  --radius: 16px;
  --sans: "Segoe UI", ui-sans-serif, system-ui, -apple-system, Roboto, "Helvetica Neue", Arial, sans-serif;
  --serif: "Iowan Old Style", "Palatino Linotype", Palatino, Georgia, "Times New Roman", serif;
  --mono: ui-monospace, "SFMono-Regular", Menlo, Consolas, monospace;
  --max: 1080px;
  --narrow: 720px;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font: 18px/1.6 var(--sans);
  text-rendering: optimizeLegibility;
}
img { max-width: 100%; height: auto; }
a { color: var(--copper-dark); text-decoration-thickness: 1px; text-underline-offset: 3px; }
a:hover { color: var(--copper); }
.wrap { width: min(var(--max), calc(100% - 40px)); margin: 0 auto; }
.narrow { width: min(var(--narrow), calc(100% - 40px)); }
.top {
  position: sticky; top: 0; z-index: 20;
  background: color-mix(in srgb, var(--paper) 88%, transparent);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line);
}
.bar { display: flex; align-items: center; justify-content: space-between; gap: 16px; min-height: 64px; }
.brand {
  font-family: var(--serif);
  font-weight: 700;
  font-size: 1.15rem;
  color: var(--ink);
  text-decoration: none;
  letter-spacing: -0.02em;
}
.brand:hover { color: var(--ink); }
.nav { display: flex; gap: 18px; flex-wrap: wrap; }
.nav a { color: var(--ink-soft); text-decoration: none; font-size: 0.95rem; }
.nav a:hover { color: var(--copper); }
.hero { padding: 72px 0 36px; }
.kicker {
  font-size: 0.78rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--copper);
  font-weight: 700;
  margin: 0 0 10px;
}
h1, h2, h3, h4 {
  font-family: var(--serif);
  letter-spacing: -0.025em;
  line-height: 1.2;
  font-weight: 650;
}
h1 { font-size: clamp(2.2rem, 5vw, 3.5rem); margin: 0 0 18px; }
h2 { font-size: clamp(1.5rem, 3vw, 2rem); margin: 0 0 12px; }
h3 { font-size: 1.2rem; margin: 1.6em 0 0.4em; }
.lede { font-size: 1.22rem; color: var(--ink-soft); max-width: 38rem; margin: 0 0 28px; }
.cta-row { display: flex; flex-wrap: wrap; gap: 12px; margin: 24px 0; align-items: center; }
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  gap: 8px;
  padding: 13px 22px;
  border-radius: 999px;
  font-weight: 650;
  font-size: 1.02rem;
  text-decoration: none;
  border: 1px solid transparent;
  cursor: pointer;
  font-family: var(--sans);
  line-height: 1.2;
}
.btn-primary { background: var(--copper); color: #fff; }
.btn-primary:hover { background: var(--copper-dark); color: #fff; }
.btn-secondary { background: var(--ink); color: var(--paper); }
.btn-secondary:hover { background: #0c1624; color: #fff; }
.btn-ghost { background: transparent; color: var(--ink); border-color: var(--line); }
.btn-ghost:hover { background: var(--paper-2); color: var(--ink); }
.price { font-variant-numeric: tabular-nums; }
.grid-2 {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 20px;
  margin: 28px 0 48px;
}
.card {
  background: var(--paper-2);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 28px 26px 24px;
  box-shadow: var(--shadow);
}
.card.featured { border-color: color-mix(in srgb, var(--copper) 45%, var(--line)); }
.card .price-lg {
  font-family: var(--serif);
  font-size: 2.4rem;
  margin: 8px 0 6px;
}
.card p { margin: 0 0 12px; color: var(--ink-soft); }
.card ul { margin: 0 0 20px; padding: 0 0 0 1.15em; color: var(--ink-soft); }
.card li { margin: 0.3em 0; }
.section { padding: 28px 0 12px; }
.section-head { margin-bottom: 22px; }
.caps {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
}
.cap {
  background: var(--paper-2);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 18px 18px 14px;
}
.cap h3 { margin: 0 0 6px; font-size: 1.08rem; }
.cap p { margin: 0; color: var(--ink-soft); font-size: 1rem; }
.cap .n {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--copper);
  margin-bottom: 4px;
}
.tidbit {
  background: var(--paper-2);
  border-left: 4px solid var(--copper);
  padding: 16px 20px;
  margin: 14px 0;
  border-radius: 0 12px 12px 0;
}
.tidbit p { margin: 0; color: var(--ink-soft); }
.tidbit strong { color: var(--ink); }
.note {
  background: var(--pine-soft);
  border-radius: 12px;
  padding: 16px 18px;
  color: var(--pine);
  margin: 18px 0;
}
.fine, .muted { color: var(--muted); font-size: 0.95rem; }
.site-foot {
  margin-top: 64px;
  border-top: 1px solid var(--line);
  padding: 28px 0 48px;
  color: var(--muted);
  font-size: 0.95rem;
}
.site-foot a { color: var(--ink-soft); }
.page-main { padding: 48px 0 24px; min-height: 60vh; }
.code-box {
  font-family: var(--mono);
  font-size: clamp(1.4rem, 4vw, 2rem);
  letter-spacing: 0.08em;
  background: var(--ink);
  color: #f6f1e8;
  padding: 18px 22px;
  border-radius: 12px;
  text-align: center;
  user-select: all;
}
.login-form { display: grid; gap: 10px; margin: 24px 0; }
.login-form label { font-weight: 650; }
.login-form input {
  font: 1.15rem/1.4 var(--mono);
  padding: 12px 14px;
  border-radius: 10px;
  border: 1px solid var(--line);
  background: var(--paper-2);
  letter-spacing: 0.06em;
}
.login-form input:focus { outline: 2px solid var(--copper); border-color: var(--copper); }
.flash {
  background: #f8e4e0;
  color: var(--danger);
  padding: 12px 14px;
  border-radius: 10px;
}
.mono { font-family: var(--mono); font-size: 0.95em; }

/* Full guide layout */
.guide-layout {
  display: grid;
  grid-template-columns: 240px minmax(0, 1fr);
  gap: 40px;
  width: min(1200px, calc(100% - 40px));
  margin: 0 auto;
  padding: 28px 0 64px;
  align-items: start;
}
.toc {
  position: sticky;
  top: 80px;
  max-height: calc(100vh - 100px);
  overflow: auto;
  padding: 8px 8px 16px 0;
  font-size: 0.92rem;
}
.toc h2 { font-size: 0.82rem; letter-spacing: 0.12em; text-transform: uppercase; color: var(--copper); font-family: var(--sans); }
.toc ol { margin: 0; padding: 0 0 0 1.2em; color: var(--ink-soft); }
.toc li { margin: 0.4em 0; }
.toc a { color: var(--ink-soft); text-decoration: none; }
.toc a:hover { color: var(--copper); }
.guide-body { background: var(--paper-2); border: 1px solid var(--line); border-radius: 18px; padding: 40px 44px 56px; box-shadow: var(--shadow); }
.guide-body > h1 { margin-top: 0; }
.guide-body section { padding-top: 12px; margin-top: 36px; border-top: 1px solid var(--line); }
.guide-body section:first-of-type { border-top: 0; margin-top: 12px; }
.guide-body p { color: var(--ink-soft); }
.guide-body li { margin: 0.35em 0; color: var(--ink-soft); }
.guide-body strong { color: var(--ink); }
.prompt {
  position: relative;
  background: #152033;
  color: #efe7d8;
  font-family: var(--mono);
  font-size: 0.86rem;
  line-height: 1.55;
  padding: 18px 18px 18px;
  border-radius: 12px;
  overflow-x: auto;
  white-space: pre-wrap;
  word-break: break-word;
}
.prompt-wrap { margin: 16px 0 22px; }
.prompt-label {
  display: flex; justify-content: space-between; align-items: baseline;
  font-size: 0.8rem; letter-spacing: 0.06em; text-transform: uppercase;
  color: var(--muted); margin-bottom: 6px; font-weight: 700;
}
.copy-btn {
  font: 650 0.8rem/1 var(--sans);
  background: transparent;
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 5px 10px;
  cursor: pointer;
  color: var(--ink-soft);
  text-transform: none;
  letter-spacing: 0;
}
.copy-btn:hover { background: var(--paper-3); }
.warn {
  background: #f8e9d8;
  border-left: 4px solid var(--copper);
  padding: 14px 16px;
  border-radius: 0 10px 10px 0;
  margin: 16px 0;
}
.warn strong { color: var(--copper-dark); }
table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.92rem;
  margin: 16px 0;
}
th, td { border: 1px solid var(--line); padding: 8px 10px; text-align: left; vertical-align: top; }
th { background: var(--paper-3); font-weight: 650; color: var(--ink); }
.checklist { list-style: none; padding: 0; }
.checklist li {
  padding: 8px 8px 8px 2.1em;
  position: relative;
  border-bottom: 1px solid var(--line);
}
.checklist li::before {
  content: "";
  width: 1.05em; height: 1.05em;
  border: 2px solid var(--copper);
  border-radius: 4px;
  position: absolute;
  left: 0; top: 0.85em;
}
.faq details {
  border-bottom: 1px solid var(--line);
  padding: 10px 0;
}
.faq summary { cursor: pointer; font-weight: 650; color: var(--ink); }
.faq details p { margin: 8px 0 6px; }
.toc-toggle { display: none; }
@media (max-width: 860px) {
  .grid-2, .caps { grid-template-columns: 1fr; }
  .guide-layout { grid-template-columns: 1fr; }
  .toc {
    position: relative; top: 0; max-height: none;
    background: var(--paper-2);
    border: 1px solid var(--line);
    border-radius: 12px;
    padding: 12px 16px;
    margin-bottom: 8px;
  }
  .guide-body { padding: 24px 18px 40px; }
  .hero { padding-top: 40px; }
  .bar { min-height: 56px; }
  .nav .hide-sm { display: none; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
}
@media print {
  .top, .toc, .copy-btn, .site-foot .cta-row, .btn { display: none !important; }
  .guide-layout { display: block; width: 100%; }
  .guide-body { box-shadow: none; border: 0; padding: 0; }
  body { background: #fff; }
}