:root {
  --bg: #fbf8f3;
  --ink: #15131a;
  --ink-soft: #4a4654;
  --accent: #ff5b3a;
  --accent-ink: #ffffff;
  --rule: #e6e0d3;
  --card: #ffffff;
  --highlight: #ffe9a8;
  --shadow: 0 1px 0 rgba(21, 19, 26, 0.04), 0 6px 24px -8px rgba(21, 19, 26, 0.12);
  --radius: 14px;
  --maxw: 980px;
  --font-display: "Fraunces", "Iowan Old Style", "Apple Garamond", Georgia, serif;
  --font-body: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --font-mono: "JetBrains Mono", ui-monospace, "SFMono-Regular", Menlo, monospace;
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  font-family: var(--font-body);
  font-size: 17px;
  line-height: 1.6;
  color: var(--ink);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

a { color: var(--ink); text-decoration: underline; text-decoration-thickness: 1px; text-underline-offset: 3px; }
a:hover { color: var(--accent); }

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

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

/* header */
.site-header {
  border-bottom: 1px solid var(--rule);
  background: var(--bg);
  position: sticky; top: 0; z-index: 10;
  backdrop-filter: saturate(140%) blur(8px);
}
.site-header .wrap {
  display: flex; align-items: center; justify-content: space-between;
  padding-top: 14px; padding-bottom: 14px; gap: 16px;
}
.brand {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 22px;
  letter-spacing: -0.01em;
  text-decoration: none;
  display: inline-flex; align-items: center; gap: 8px;
}
.brand-mark {
  display: inline-block; width: 22px; height: 22px;
  background: var(--accent); border-radius: 6px;
  transform: rotate(-6deg);
}
.brand small {
  font-family: var(--font-mono); font-weight: 500;
  font-size: 11px; color: var(--ink-soft);
  text-transform: uppercase; letter-spacing: 0.08em;
}

.nav-toggle {
  border: 1px solid var(--rule); background: var(--card);
  border-radius: 999px; padding: 8px 14px;
  font: inherit; cursor: pointer;
  display: inline-flex; align-items: center; gap: 8px;
}
.nav-toggle[aria-expanded="true"] { background: var(--ink); color: #fff; border-color: var(--ink); }
.nav-toggle svg { width: 14px; height: 14px; }

.site-nav {
  display: none;
  border-top: 1px solid var(--rule);
  background: var(--bg);
}
.site-nav[data-open="true"] { display: block; }
.site-nav .wrap { padding-top: 16px; padding-bottom: 24px; }
.site-nav ul {
  list-style: none; padding: 0; margin: 0;
  display: grid; gap: 6px;
}
.site-nav a {
  display: block; padding: 10px 12px;
  border-radius: 10px;
  text-decoration: none;
  font-weight: 500;
}
.site-nav a:hover { background: var(--card); }

@media (min-width: 880px) {
  .nav-toggle { display: none; }
  .site-nav { display: block; border-top: 0; background: transparent; }
  .site-nav .wrap { padding: 0; }
  .site-header .wrap { display: grid; grid-template-columns: auto 1fr; align-items: center; }
  .site-nav ul { grid-auto-flow: column; justify-content: end; gap: 4px; }
  .site-nav a { padding: 8px 12px; font-size: 14px; }
}

/* hero */
.hero {
  padding: 56px 0 36px;
  border-bottom: 1px solid var(--rule);
}
.eyebrow {
  font-family: var(--font-mono); font-size: 12px;
  text-transform: uppercase; letter-spacing: 0.12em;
  color: var(--accent); margin: 0 0 16px;
}
h1 {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(34px, 6vw, 56px);
  line-height: 1.05;
  letter-spacing: -0.02em;
  margin: 0 0 18px;
}
h1 em { font-style: italic; color: var(--accent); }
.lede {
  font-size: clamp(18px, 2.2vw, 21px);
  line-height: 1.5;
  max-width: 64ch;
  color: var(--ink-soft);
  margin: 0 0 28px;
}

/* CTA banner */
.cta-banner {
  background: var(--ink);
  color: #fff;
  border-radius: var(--radius);
  padding: 22px 24px;
  display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between;
  gap: 16px;
  margin: 24px 0 32px;
}
.cta-banner p { margin: 0; font-size: 16px; }
.cta-banner strong { color: var(--highlight); }
.btn {
  display: inline-block;
  background: var(--accent);
  color: var(--accent-ink);
  text-decoration: none;
  padding: 12px 22px;
  border-radius: 999px;
  font-weight: 600;
  font-size: 15px;
  border: 0;
  cursor: pointer;
  white-space: nowrap;
  transition: transform 120ms ease;
}
.btn:hover { transform: translateY(-1px); color: var(--accent-ink); }
.btn-ghost {
  background: transparent;
  color: var(--ink);
  border: 1px solid var(--rule);
}
.btn-ghost:hover { background: var(--ink); color: #fff; border-color: var(--ink); }

/* sections */
section { padding: 40px 0; border-bottom: 1px solid var(--rule); }
section:last-of-type { border-bottom: 0; }
h2 {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(26px, 4vw, 34px);
  line-height: 1.15;
  letter-spacing: -0.01em;
  margin: 0 0 8px;
}
h3 {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 22px;
  margin: 32px 0 10px;
}
.section-intro {
  color: var(--ink-soft);
  max-width: 64ch;
  margin: 0 0 24px;
}

/* caption cards */
.captions {
  display: grid;
  gap: 12px;
  grid-template-columns: 1fr;
}
@media (min-width: 720px) {
  .captions { grid-template-columns: 1fr 1fr; }
}
.caption {
  background: var(--card);
  border: 1px solid var(--rule);
  border-radius: var(--radius);
  padding: 18px 18px 14px;
  box-shadow: var(--shadow);
  display: flex; flex-direction: column; gap: 10px;
}
.caption blockquote {
  margin: 0;
  font-family: var(--font-display);
  font-size: 19px;
  line-height: 1.35;
  font-weight: 500;
}
.caption .meta {
  display: flex; flex-wrap: wrap; align-items: center; gap: 10px;
  font-size: 13px; color: var(--ink-soft);
  border-top: 1px dashed var(--rule);
  padding-top: 10px;
  margin-top: auto;
}
.caption .pair { font-style: italic; }
.caption .copy {
  margin-left: auto;
  background: var(--bg);
  border: 1px solid var(--rule);
  border-radius: 999px;
  font-size: 12px;
  padding: 5px 10px;
  cursor: pointer;
  font-family: var(--font-mono);
  letter-spacing: 0.04em;
}
.caption .copy:hover { background: var(--ink); color: #fff; border-color: var(--ink); }
.caption .copy[data-copied="true"] { background: var(--accent); color: #fff; border-color: var(--accent); }

/* how-to */
.steps {
  display: grid; gap: 18px;
  counter-reset: step;
  grid-template-columns: 1fr;
}
@media (min-width: 720px) { .steps { grid-template-columns: repeat(3, 1fr); } }
.step {
  background: var(--card);
  border: 1px solid var(--rule);
  border-radius: var(--radius);
  padding: 22px 22px 18px;
  position: relative;
}
.step::before {
  counter-increment: step;
  content: counter(step);
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 32px;
  color: var(--accent);
  display: block;
  line-height: 1;
  margin-bottom: 10px;
}
.step h3 { margin: 0 0 6px; font-size: 17px; }
.step p { margin: 0; color: var(--ink-soft); font-size: 15px; }

/* faq */
.faq details {
  border-top: 1px solid var(--rule);
  padding: 14px 0;
}
.faq details:last-of-type { border-bottom: 1px solid var(--rule); }
.faq summary {
  cursor: pointer;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 19px;
  list-style: none;
  display: flex; justify-content: space-between; gap: 16px;
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after {
  content: "+"; font-family: var(--font-mono); font-weight: 400;
  color: var(--accent); flex-shrink: 0;
}
.faq details[open] summary::after { content: "−"; }
.faq details p { color: var(--ink-soft); margin: 10px 0 0; }

/* related */
.related-grid {
  display: grid; gap: 14px;
  grid-template-columns: 1fr;
}
@media (min-width: 720px) { .related-grid { grid-template-columns: repeat(3, 1fr); } }
.related-card {
  display: block;
  background: var(--card);
  border: 1px solid var(--rule);
  border-radius: var(--radius);
  padding: 20px;
  text-decoration: none;
  color: var(--ink);
  transition: transform 120ms ease, border-color 120ms ease;
}
.related-card:hover { transform: translateY(-2px); border-color: var(--ink); color: var(--ink); }
.related-card .label {
  font-family: var(--font-mono); font-size: 11px;
  text-transform: uppercase; letter-spacing: 0.08em;
  color: var(--accent);
}
.related-card h3 {
  font-size: 19px; margin: 6px 0 6px;
}
.related-card p { margin: 0; color: var(--ink-soft); font-size: 14px; }

/* prose */
.prose p { margin: 0 0 16px; }
.prose ul, .prose ol { padding-left: 22px; margin: 0 0 16px; }
.prose li { margin-bottom: 6px; }
.prose a { font-weight: 500; }

/* footer */
.site-footer {
  background: var(--ink); color: #d6d2db;
  padding: 36px 0 28px;
  margin-top: 40px;
  font-size: 14px;
}
.site-footer a { color: #fff; }
.site-footer .wrap {
  display: grid; gap: 18px;
  grid-template-columns: 1fr;
  align-items: start;
}
@media (min-width: 720px) {
  .site-footer .wrap { grid-template-columns: 2fr 1fr 1fr; }
}
.footer-brand .brand { color: #fff; }
.footer-brand .brand-mark { background: var(--accent); }
.footer-brand p { color: #a09baa; margin: 8px 0 0; max-width: 38ch; }
.footer-col h4 {
  font-family: var(--font-mono); font-size: 11px;
  text-transform: uppercase; letter-spacing: 0.1em;
  color: #8d8694; margin: 0 0 10px; font-weight: 500;
}
.footer-col ul { list-style: none; padding: 0; margin: 0; display: grid; gap: 6px; }
.footer-meta {
  margin-top: 28px; padding-top: 20px;
  border-top: 1px solid #2c2932;
  display: flex; justify-content: space-between; flex-wrap: wrap; gap: 10px;
  color: #8d8694; font-size: 13px;
}

/* utils */
.kbd {
  font-family: var(--font-mono); font-size: 12px;
  background: var(--card); border: 1px solid var(--rule);
  border-radius: 4px; padding: 2px 6px;
}
.tag {
  display: inline-block;
  font-family: var(--font-mono); font-size: 11px;
  text-transform: uppercase; letter-spacing: 0.08em;
  color: var(--ink-soft);
  background: var(--card);
  border: 1px solid var(--rule);
  border-radius: 999px;
  padding: 3px 9px;
}
.tag-dot::before {
  content: "•"; color: var(--accent); margin-right: 6px;
}

/* skip link */
.skip {
  position: absolute; left: -9999px; top: 0;
  background: var(--ink); color: #fff;
  padding: 8px 12px; border-radius: 6px;
}
.skip:focus { left: 16px; top: 16px; }

@media (prefers-reduced-motion: reduce) {
  .btn, .related-card { transition: none; }
}