/* ===================================================
   Palette & tokens
   =================================================== */
:root {
  --bg: #FAF9F6;
  --ink: #1C2B39;
  --ink-soft: #4A5A68;
  --accent: #1F6F54;
  --accent-soft: #E7EFEA;
  --gold: #B98B4E;
  --line: #DDD8CC;

  --serif: "Source Serif 4", Georgia, "Times New Roman", serif;
  --sans: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 17px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; }

/* ===================================================
   Layout helpers
   =================================================== */
.wrap {
  max-width: 720px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ===================================================
   Header / nav
   =================================================== */
header.site-header {
  border-bottom: 1px solid var(--line);
  padding: 28px 0;
}

header.site-header .wrap {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
}

.logo {
  font-family: var(--serif);
  font-size: 22px;
  font-weight: 600;
  color: var(--ink);
  text-decoration: none;
  letter-spacing: -0.01em;
}

.logo span { color: var(--accent); }

nav.site-nav {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

nav.site-nav a {
  color: var(--ink);
  text-decoration: none;
  font-size: 14px;
  white-space: nowrap;
  border: 1px solid var(--line);
  border-radius: 20px;
  padding: 7px 16px;
  display: inline-flex;
  align-items: center;
  gap: 7px;
}

nav.site-nav a:hover { border-color: var(--accent); color: var(--accent); }

/* ===================================================
   Hero
   =================================================== */
.hero {
  padding: 64px 0 48px;
  border-bottom: 1px solid var(--line);
}

.hero .wrap {
  display: flex;
  align-items: center;
  gap: 48px;
}

.hero-text { flex: 1 1 480px; }
.hero-illustration { flex: 0 0 220px; }

@media (max-width: 760px) {
  .hero .wrap { flex-direction: column-reverse; gap: 28px; }
  .hero-illustration { flex: 0 0 auto; width: 160px; }
}

.hero h1 {
  font-family: var(--serif);
  font-size: 40px;
  line-height: 1.2;
  margin: 0 0 20px;
  max-width: 14ch;
}

.hero p {
  font-size: 18px;
  color: var(--ink-soft);
  max-width: 52ch;
  margin: 0 0 28px;
}

.hero-actions {
  display: flex;
  align-items: center;
  gap: 20px;
  flex-wrap: wrap;
}

.btn {
  display: inline-block;
  background: var(--ink);
  color: var(--bg);
  text-decoration: none;
  padding: 12px 22px;
  font-size: 15px;
  border-radius: 3px;
  line-height: 1.2;
  box-sizing: border-box;
}

.btn:hover { background: var(--accent); }

.btn.btn-outline {
  background: transparent;
  color: var(--ink);
  border: 1px solid var(--ink);
  padding: 11px 21px;
}

.btn.btn-outline:hover {
  border-color: var(--accent);
  color: var(--accent);
  background: transparent;
}

/* ===================================================
   Index sections (table-of-contents style, no cards)
   =================================================== */
section.index-block {
  padding: 48px 0;
  border-bottom: 1px solid var(--line);
}

section.index-block h2 {
  font-family: var(--serif);
  font-size: 24px;
  margin: 0 0 6px;
  display: flex;
  align-items: center;
  gap: 10px;
}

section.index-block h2 svg { flex-shrink: 0; }

section.index-block .lede {
  color: var(--ink-soft);
  margin: 0 0 24px;
  max-width: 55ch;
}

ol.index-list, ul.index-list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.index-list li {
  border-top: 1px solid var(--line);
  padding: 16px 0;
  display: flex;
  align-items: baseline;
  gap: 16px;
}

.index-list li:last-child { border-bottom: 1px solid var(--line); }

.index-list .num {
  font-family: var(--serif);
  color: var(--gold);
  font-size: 15px;
  width: 1.6em;
  flex-shrink: 0;
}

.index-list a {
  color: var(--ink);
  text-decoration: none;
  font-size: 17px;
}

.index-list a:hover { color: var(--accent); }

.index-list .desc {
  display: block;
  color: var(--ink-soft);
  font-size: 14px;
  margin-top: 4px;
}

/* ===================================================
   Article
   =================================================== */
main.article {
  padding: 56px 0 80px;
}

main.article h1 {
  font-family: var(--serif);
  font-size: 34px;
  line-height: 1.25;
  margin: 0 0 32px;
  max-width: 18ch;
}

main.article h2 {
  font-family: var(--serif);
  font-size: 22px;
  margin: 40px 0 14px;
}

main.article p {
  margin: 0 0 18px;
  max-width: 68ch;
}

main.article ul {
  margin: 0 0 18px;
  padding-left: 22px;
}

main.article li { margin-bottom: 8px; }

/* Acronym tooltips */
abbr[title] {
  text-decoration: underline dotted;
  text-decoration-color: var(--gold);
  cursor: help;
}

/* Callout / CTA block inside article, replaces emoji banners */
.callout {
  background: var(--accent-soft);
  border-left: 3px solid var(--accent);
  padding: 20px 24px;
  margin: 32px 0;
  max-width: 68ch;
}

.callout p {
  margin: 0 0 12px;
  font-size: 15px;
  color: var(--ink);
}

.callout a.btn { padding: 10px 18px; font-size: 14px; }

/* FAQ */
.faq-item {
  border-top: 1px solid var(--line);
  padding: 18px 0;
  max-width: 68ch;
}

.faq-item:last-child { border-bottom: 1px solid var(--line); }

.faq-item h3 {
  font-size: 16px;
  margin: 0 0 8px;
  font-family: var(--sans);
  font-weight: 600;
}

.faq-item p { margin: 0; color: var(--ink-soft); }

/* ===================================================
   Footer
   =================================================== */
footer.site-footer {
  padding: 32px 0 48px;
}

footer.site-footer p {
  color: var(--ink-soft);
  font-size: 13px;
  margin: 0;
}

footer.site-footer .footer-links {
  margin-top: 10px;
}

footer.site-footer .footer-links a {
  color: var(--ink-soft);
  margin-right: 18px;
}

footer.site-footer a { color: var(--ink-soft); }

/* ===================================================
   Responsive
   =================================================== */
@media (max-width: 600px) {
  .hero h1 { font-size: 30px; }
  main.article h1 { font-size: 26px; }
  nav.site-nav a { font-size: 13px; padding: 6px 12px; }
}

@media (max-width: 820px) {
  header.site-header .wrap { flex-direction: column; align-items: flex-start; gap: 14px; }
}