/* ==========================================================================
   Neubauer Twin Study — public archive & advocacy
   Light, paper-like aesthetic for long-form reading. Crimson accent for
   advocacy and sealed-record cues.
   ========================================================================== */

@font-face {
  font-family: 'Source Serif';
  font-style: normal;
  font-weight: 400;
  font-display: swap;
  src: local('Source Serif 4'), local('Source Serif Pro'), local('Charter'), local('Iowan Old Style');
}
@font-face {
  font-family: 'Source Serif';
  font-style: italic;
  font-weight: 400;
  font-display: swap;
  src: local('Source Serif 4 Italic'), local('Source Serif Pro Italic'), local('Charter Italic'), local('Iowan Old Style Italic');
}
@font-face {
  font-family: 'Source Serif';
  font-style: normal;
  font-weight: 700;
  font-display: swap;
  src: local('Source Serif 4 Bold'), local('Source Serif Pro Bold'), local('Charter Bold'), local('Iowan Old Style Bold');
}

:root {
  --paper: #faf7f1;
  --paper-2: #f3eee3;
  --ink: #1a1614;
  --ink-2: #3a322c;
  --muted: #6b6660;
  --rule: #d8d3c8;
  --rule-2: #e8e3d8;
  --accent: #8b1a1a;
  --accent-2: #6b1414;
  --serif: 'Source Serif', 'Source Serif 4', 'Source Serif Pro', Charter, 'Iowan Old Style', 'Georgia', 'Times New Roman', serif;
  --sans: -apple-system, BlinkMacSystemFont, 'Inter', 'Segoe UI', system-ui, sans-serif;
  --mono: ui-monospace, 'SF Mono', Menlo, Consolas, monospace;
  --measure: 38rem;
  --measure-wide: 56rem;
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--serif);
  font-size: 18px;
  line-height: 1.6;
  font-feature-settings: 'kern', 'liga', 'onum';
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}

/* ---------- Header / nav ---------- */

.site-header {
  border-bottom: 1px solid var(--rule);
  background: var(--paper);
}
.site-header-inner {
  max-width: 76rem;
  margin: 0 auto;
  padding: 1rem 1.5rem;
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 2rem;
  flex-wrap: wrap;
}
.wordmark {
  font-family: var(--serif);
  font-weight: 700;
  font-size: 1.05rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--ink);
  text-decoration: none;
  white-space: nowrap;
}
.wordmark .accent { color: var(--accent); }
.wordmark:hover { color: var(--accent); }

.site-nav {
  font-family: var(--sans);
  font-size: 0.82rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}
.site-nav ul {
  list-style: none;
  margin: 0; padding: 0;
  display: flex;
  gap: 1.5rem;
  flex-wrap: wrap;
}
.site-nav a {
  color: var(--ink-2);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  padding-bottom: 2px;
}
.site-nav a:hover, .site-nav a[aria-current="page"] {
  color: var(--accent);
  border-bottom-color: var(--accent);
}

/* ---------- Layout ---------- */

main {
  max-width: var(--measure-wide);
  margin: 0 auto;
  padding: 2.5rem 1.5rem 4rem;
}
.prose {
  max-width: var(--measure);
}
.prose-wide {
  max-width: var(--measure-wide);
}

/* ---------- Typography ---------- */

h1, h2, h3, h4 {
  font-family: var(--serif);
  color: var(--ink);
  line-height: 1.2;
  letter-spacing: -0.01em;
}
h1 {
  font-size: clamp(2rem, 4vw, 2.85rem);
  font-weight: 700;
  margin: 0 0 0.4rem;
}
h2 {
  font-size: 1.55rem;
  font-weight: 700;
  margin: 2.5rem 0 0.6rem;
  padding-top: 1.2rem;
  border-top: 1px solid var(--rule-2);
}
h3 {
  font-size: 1.18rem;
  font-weight: 700;
  margin: 1.8rem 0 0.4rem;
}
h4 {
  font-size: 1rem;
  font-weight: 700;
  margin: 1.4rem 0 0.3rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--ink-2);
}
p { margin: 0.6rem 0 1rem; }
a { color: var(--accent); text-decoration: underline; text-decoration-thickness: 1px; text-underline-offset: 2px; }
a:hover { color: var(--accent-2); }
strong { font-weight: 700; }
em { font-style: italic; }
small { color: var(--muted); }

ul, ol { padding-left: 1.4rem; margin: 0.4rem 0 1rem; }
li { margin: 0.3rem 0; }

blockquote {
  margin: 1.4rem 0;
  padding: 0.4rem 0 0.4rem 1.2rem;
  border-left: 3px solid var(--accent);
  font-family: var(--serif);
  font-style: italic;
  color: var(--ink-2);
}
blockquote cite {
  display: block;
  margin-top: 0.5rem;
  font-style: normal;
  font-size: 0.88rem;
  color: var(--muted);
}

hr {
  border: 0;
  border-top: 1px solid var(--rule);
  margin: 2rem 0;
}

/* ---------- Hero ---------- */

.hero {
  padding: 1rem 0 1.5rem;
  border-bottom: 1px solid var(--rule);
  margin-bottom: 1rem;
}
.hero .eyebrow {
  font-family: var(--sans);
  font-size: 0.75rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 0.6rem;
}
.hero .lede {
  font-size: 1.18rem;
  line-height: 1.55;
  color: var(--ink-2);
  max-width: var(--measure);
  margin-top: 0.8rem;
}

/* ---------- Breadcrumb ---------- */

.breadcrumb {
  font-family: var(--sans);
  font-size: 0.78rem;
  letter-spacing: 0.06em;
  color: var(--muted);
  text-transform: uppercase;
  margin-bottom: 0.6rem;
}
.breadcrumb a { color: var(--muted); text-decoration: none; }
.breadcrumb a:hover { color: var(--accent); }
.breadcrumb .sep { margin: 0 0.4rem; opacity: 0.6; }

/* ---------- Cards & grids ---------- */

.grid {
  display: grid;
  gap: 1.5rem;
  margin: 1.5rem 0;
}
.grid-2 { grid-template-columns: repeat(auto-fit, minmax(18rem, 1fr)); }
.grid-3 { grid-template-columns: repeat(auto-fit, minmax(15rem, 1fr)); }

.card {
  display: block;
  padding: 1.2rem 1.3rem;
  background: var(--paper-2);
  border: 1px solid var(--rule);
  text-decoration: none;
  color: var(--ink);
  transition: border-color 0.15s, transform 0.15s;
}
.card:hover {
  border-color: var(--accent);
  color: var(--ink);
}
.card h3 {
  margin: 0 0 0.3rem;
  font-size: 1.1rem;
}
.card p {
  margin: 0;
  font-size: 0.95rem;
  color: var(--ink-2);
  line-height: 1.5;
}
.card .meta {
  font-family: var(--sans);
  font-size: 0.72rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 0.4rem;
}

/* ---------- Dossier / fact box ---------- */

.dossier {
  background: var(--paper-2);
  border-left: 3px solid var(--accent);
  padding: 1.1rem 1.3rem;
  margin: 1.5rem 0;
  font-size: 0.95rem;
}
.dossier h4 {
  margin: 0 0 0.6rem;
  font-size: 0.78rem;
  letter-spacing: 0.12em;
  color: var(--accent);
}
.dossier dl { margin: 0; }
.dossier dt {
  font-family: var(--sans);
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--muted);
  margin-top: 0.6rem;
}
.dossier dt:first-of-type { margin-top: 0; }
.dossier dd { margin: 0.1rem 0 0; }

/* ---------- Pull quote ---------- */

.pullquote {
  font-family: var(--serif);
  font-size: 1.4rem;
  line-height: 1.35;
  color: var(--ink);
  border-top: 1px solid var(--rule);
  border-bottom: 1px solid var(--rule);
  padding: 1.4rem 0;
  margin: 2rem 0;
  font-style: italic;
}
.pullquote cite {
  display: block;
  font-family: var(--sans);
  font-size: 0.78rem;
  font-style: normal;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--muted);
  margin-top: 0.7rem;
}

/* ---------- Citations / footnotes ---------- */

sup.cite {
  font-family: var(--sans);
  font-size: 0.7rem;
  font-weight: 600;
}
sup.cite a {
  color: var(--accent);
  text-decoration: none;
  padding: 0 1px;
}
.footnotes {
  margin-top: 3rem;
  padding-top: 1.2rem;
  border-top: 1px solid var(--rule);
  font-size: 0.88rem;
  color: var(--ink-2);
}
.footnotes h2 {
  font-size: 0.78rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  border: 0;
  padding: 0;
  margin: 0 0 0.8rem;
  font-family: var(--sans);
  color: var(--muted);
  font-weight: 600;
}
.footnotes ol {
  padding-left: 1.4rem;
  font-family: var(--sans);
  font-size: 0.85rem;
  line-height: 1.5;
}
.footnotes li {
  margin: 0.4rem 0;
}
.footnotes a {
  word-break: break-word;
}

/* ---------- Timeline ---------- */

.timeline {
  list-style: none;
  padding: 0;
  margin: 1.5rem 0;
  border-left: 2px solid var(--rule);
}
.timeline li {
  position: relative;
  padding: 0 0 1.5rem 1.5rem;
  margin: 0;
}
.timeline li::before {
  content: "";
  position: absolute;
  left: -7px;
  top: 0.5rem;
  width: 12px;
  height: 12px;
  background: var(--accent);
  border-radius: 50%;
  border: 3px solid var(--paper);
}
.timeline .year {
  font-family: var(--sans);
  font-weight: 700;
  font-size: 0.85rem;
  letter-spacing: 0.06em;
  color: var(--accent);
  display: block;
  margin-bottom: 0.2rem;
}
.timeline .event {
  font-size: 1rem;
  color: var(--ink);
}

/* ---------- CTA banner ---------- */

.cta-banner {
  background: var(--ink);
  color: var(--paper);
  padding: 2rem 1.8rem;
  margin: 3rem 0 0;
  border-left: 4px solid var(--accent);
}
.cta-banner h2 {
  color: var(--paper);
  border: 0;
  padding: 0;
  margin: 0 0 0.5rem;
  font-size: 1.4rem;
}
.cta-banner p {
  color: var(--paper-2);
  margin: 0 0 0.8rem;
}
.cta-banner a {
  color: var(--paper);
  text-decoration: underline;
  text-decoration-color: var(--accent);
  text-decoration-thickness: 2px;
}

/* ---------- Footer ---------- */

.site-footer {
  border-top: 1px solid var(--rule);
  margin-top: 4rem;
  padding: 2rem 1.5rem;
  background: var(--paper);
  font-family: var(--sans);
  font-size: 0.85rem;
  color: var(--muted);
}
.site-footer-inner {
  max-width: 76rem;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1.5rem;
}
.site-footer a { color: var(--ink-2); text-decoration: none; margin-right: 1rem; }
.site-footer a:hover { color: var(--accent); }
.site-footer .copyright { color: var(--muted); font-size: 0.78rem; }

/* ---------- Utilities ---------- */

.eyebrow {
  font-family: var(--sans);
  font-size: 0.75rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--accent);
}
.muted { color: var(--muted); }
.center { text-align: center; }
.section-intro {
  font-size: 1.08rem;
  color: var(--ink-2);
  max-width: var(--measure);
}

/* ---------- Responsive ---------- */

@media (max-width: 640px) {
  body { font-size: 17px; }
  main { padding: 1.5rem 1.2rem 3rem; }
  .site-header-inner { padding: 0.8rem 1.2rem; gap: 1rem; }
  .site-nav ul { gap: 1rem; }
  .site-nav { font-size: 0.78rem; }
  h1 { font-size: 1.85rem; }
  h2 { font-size: 1.3rem; }
  .pullquote { font-size: 1.15rem; }
}

/* ---------- Print ---------- */

@media print {
  .site-header, .site-nav, .site-footer, .cta-banner { display: none; }
  body { background: white; color: black; font-size: 12pt; }
  a { color: black; text-decoration: underline; }
  main { max-width: none; padding: 0; }
}