.origins-reference {
  color: var(--color-ink);
  background:
    radial-gradient(circle at 12% 0%, rgba(155, 60, 49, 0.06), transparent 16%),
    linear-gradient(180deg, #f3ece4 0%, #efe8df 100%);
}

.origins-reference .nav {
  background: rgba(243, 236, 228, 0.86);
  backdrop-filter: blur(10px);
}

.origins-reference .nav.is-scrolled {
  background: rgba(243, 236, 228, 0.94);
}

.origins-reference .nav-inner,
.origins-reference .footer {
  border-color: var(--color-paper-border);
}

.origins-reference .nav-logo,
.origins-reference .nav-link,
.origins-reference .footer-brand,
.origins-reference .footer-links a,
.origins-reference .footer-copy {
  color: var(--color-ink);
}

.origins-reference .nav-link,
.origins-reference .footer-links a,
.origins-reference .footer-copy {
  opacity: 0.64;
}

.origins-reference .nav-cta {
  border-color: rgba(155, 60, 49, 0.28);
  background: var(--color-accent);
  color: var(--color-paper);
}

.origins-reference .nav-cta:hover,
.origins-reference .nav-cta:focus-visible {
  border-color: rgba(155, 60, 49, 0.44);
  background: #8f372d;
}

.origins-reference .nav-link:hover,
.origins-reference .nav-link:focus-visible,
.origins-reference .footer-links a:hover,
.origins-reference .footer-links a:focus-visible {
  opacity: 1;
  color: var(--color-ink);
}

.origins-page-hero {
  padding-block: clamp(var(--space-16), 9vw, var(--space-24));
  border-bottom: 1px solid var(--color-paper-border);
}

.origins-page-layout {
  display: grid;
  grid-template-columns: minmax(0, 0.88fr) minmax(360px, 1fr);
  gap: clamp(var(--space-12), 7vw, var(--space-20));
  align-items: start;
}

.origins-page-intro {
  max-width: 38rem;
  padding-right: clamp(var(--space-4), 2vw, var(--space-8));
}

.origins-page-title {
  max-width: 11ch;
  margin-top: var(--space-6);
  font-size: clamp(3.35rem, 2rem + 4.2vw, 6.4rem);
  line-height: 0.92;
  letter-spacing: -0.05em;
  font-weight: 600;
  color: var(--color-ink);
}

.origins-page-note {
  max-width: 40rem;
  color: var(--color-ink-muted);
}

.origins-page-note {
  max-width: 18ch;
  margin-top: var(--space-5);
  font-family: var(--font-accent);
  font-size: clamp(1.34rem, 1.04rem + 0.72vw, 1.86rem);
  line-height: 1.06;
  font-style: italic;
  color: var(--color-accent);
}

.origin-index-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.4rem 1.25rem;
  margin-top: 0.2rem;
  padding-left: clamp(1.5rem, 4vw, 2.4rem);
  border-left: 1px solid var(--color-paper-border);
}

.origin-index-grid a {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 0.7rem;
  align-items: start;
  min-height: 4rem;
  padding: 1.05rem 0.7rem;
  border-bottom: 1px solid rgba(22, 18, 15, 0.12);
  border-radius: 0.9rem;
  transition:
    color 180ms ease,
    padding-left 200ms ease,
    border-color 180ms ease,
    background-color 180ms ease;
}

.origin-index-grid a:hover,
.origin-index-grid a:focus-visible {
  padding-left: 0.55rem;
  border-color: rgba(155, 60, 49, 0.24);
  background: rgba(155, 60, 49, 0.05);
}

.origin-index-grid__number {
  padding-top: 0.12rem;
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--color-accent);
  opacity: 0.7;
}

.origin-index-grid__name {
  font-size: clamp(1.04rem, 1rem + 0.24vw, 1.16rem);
  font-weight: 550;
  line-height: 1.34;
  color: rgba(22, 18, 15, 0.9);
  transition: color 180ms ease;
}

.origin-index-grid a:hover .origin-index-grid__name,
.origin-index-grid a:focus-visible .origin-index-grid__name {
  color: var(--color-ink);
}

.origin-files {
  padding-block: clamp(var(--space-8), 4vw, var(--space-12)) clamp(var(--space-16), 8vw, var(--space-24));
}

.origin-file {
  display: grid;
  grid-template-columns: minmax(260px, 0.78fr) minmax(0, 1.22fr);
  gap: clamp(var(--space-12), 6vw, var(--space-18));
  align-items: start;
  padding-block: clamp(var(--space-10), 6vw, var(--space-16));
  border-top: 1px solid var(--color-paper-border);
}

.origin-file__heading {
  max-width: 26rem;
  position: sticky;
  top: calc(84px + 1.5rem);
}

.origin-file__number {
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--color-accent);
}

.origin-file__question {
  max-width: 12ch;
  margin-top: var(--space-5);
  font-size: clamp(2.1rem, 1.34rem + 2.08vw, 3.5rem);
  line-height: 0.98;
  letter-spacing: -0.045em;
  font-weight: 600;
  color: var(--color-ink);
}

.origin-file__aside {
  max-width: 22rem;
  margin-top: var(--space-5);
  font-family: var(--font-accent);
  font-size: clamp(1.32rem, 1.06rem + 0.7vw, 1.9rem);
  line-height: 1.08;
  font-style: italic;
  color: var(--color-accent);
}

.origin-file__summary {
  max-width: 38rem;
  font-size: clamp(1.18rem, 1.05rem + 0.34vw, 1.38rem);
  line-height: 1.44;
  color: rgba(22, 18, 15, 0.88);
}

.origin-file__meta {
  margin-top: var(--space-6);
}

.origin-file__meta div {
  display: flex;
  flex-wrap: wrap;
  gap: 0.55rem;
  align-items: baseline;
  padding-top: 1rem;
  border-top: 1px solid rgba(22, 18, 15, 0.12);
}

.origin-file__meta dt {
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--color-accent);
}

.origin-file__meta dd {
  color: var(--color-ink-muted);
  line-height: 1.56;
}

.origins-reference .footer {
  border-top: 1px solid var(--color-paper-border);
}

@media (max-width: 980px) {
  .origins-page-layout,
  .origin-file {
    grid-template-columns: 1fr;
  }

  .origin-index-grid {
    margin-top: var(--space-10);
    padding-top: var(--space-10);
    padding-left: 0;
    border-top: 1px solid var(--color-paper-border);
    border-left: 0;
  }

  .origin-file__heading {
    position: static;
  }
}

@media (max-width: 760px) {
  .origin-index-grid,
  .origin-file__meta {
    grid-template-columns: 1fr;
  }
}