.reference-page {
  --reference-ink: #10233f;
  --reference-muted: #5d6b7d;
  --reference-line: #dce4ee;
  --reference-soft: #f4f7fb;
  background: #fff;
  color: var(--reference-ink);
}

.reference-hero {
  background: linear-gradient(128deg, #071d38 0%, #0c315c 62%, #164b7a 100%);
  color: #fff;
  padding: 74px 0 68px;
}

.reference-hero-inner {
  max-width: 920px;
}

.reference-hero .eyebrow,
.reference-section .eyebrow {
  color: #d9ad63;
  font-size: .78rem;
  font-weight: 800;
  letter-spacing: .14em;
  margin: 0 0 14px;
  text-transform: uppercase;
}

.reference-hero h1 {
  color: #fff;
  font-size: clamp(2.35rem, 5.7vw, 4.5rem);
  letter-spacing: -.045em;
  line-height: 1.02;
  margin: 0;
  max-width: 820px;
}

.reference-hero-lead {
  color: #dce8f5;
  font-size: 1.13rem;
  line-height: 1.75;
  margin: 24px 0 0;
  max-width: 760px;
}

.reference-search {
  align-items: center;
  background: #fff;
  border-radius: 10px;
  box-shadow: 0 18px 45px rgba(0, 0, 0, .2);
  color: #34506d;
  display: flex;
  gap: 12px;
  margin-top: 30px;
  max-width: 720px;
  padding: 0 16px;
}

.reference-search i {
  font-size: 1.15rem;
}

.reference-search input {
  background: transparent;
  border: 0;
  color: var(--reference-ink);
  font: inherit;
  min-width: 0;
  outline: 0;
  padding: 17px 0;
  width: 100%;
}

.reference-search kbd {
  background: #eef3f8;
  border: 1px solid #d6e0ea;
  border-radius: 5px;
  color: #5d6b7d;
  font: 600 .75rem/1 Inter, sans-serif;
  padding: 5px 7px;
}

.reference-count {
  color: #b9cadc;
  font-size: .88rem;
  margin: 17px 0 0;
}

.reference-section {
  padding: 68px 0;
}

.reference-section--soft {
  background: var(--reference-soft);
  border-bottom: 1px solid var(--reference-line);
  border-top: 1px solid var(--reference-line);
}

.reference-heading {
  max-width: 760px;
}

.reference-heading h2 {
  color: var(--reference-ink);
  font-size: clamp(1.85rem, 3.5vw, 2.65rem);
  letter-spacing: -.035em;
  line-height: 1.12;
  margin: 0;
}

.reference-heading p {
  color: var(--reference-muted);
  line-height: 1.7;
  margin: 15px 0 0;
}

.authority-grid {
  display: grid;
  gap: 16px;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  margin-top: 32px;
}

.authority-card {
  background: #fff;
  border: 1px solid var(--reference-line);
  border-radius: 10px;
  padding: 24px;
}

.authority-card i {
  color: #b84b4e;
  font-size: 1.35rem;
}

.authority-card h3 {
  font-size: 1rem;
  margin: 15px 0 8px;
}

.authority-card p {
  color: var(--reference-muted);
  font-size: .88rem;
  line-height: 1.6;
  margin: 0;
}

.reference-layout {
  align-items: start;
  display: grid;
  gap: 38px;
  grid-template-columns: 220px minmax(0, 1fr);
}

.reference-nav {
  position: sticky;
  top: 92px;
}

.reference-nav p {
  color: #7a8796;
  font-size: .72rem;
  font-weight: 800;
  letter-spacing: .12em;
  margin: 0 0 10px;
  text-transform: uppercase;
}

.reference-nav a {
  border-left: 2px solid var(--reference-line);
  color: #3e536b;
  display: block;
  font-size: .88rem;
  font-weight: 650;
  padding: 10px 13px;
  text-decoration: none;
}

.reference-nav a:hover {
  border-color: #b84b4e;
  color: #9f3539;
}

.reference-group + .reference-group {
  border-top: 1px solid var(--reference-line);
  margin-top: 42px;
  padding-top: 42px;
}

.reference-group-heading {
  align-items: end;
  display: flex;
  gap: 20px;
  justify-content: space-between;
  margin-bottom: 18px;
}

.reference-group-heading h2 {
  font-size: 1.6rem;
  letter-spacing: -.025em;
  margin: 0 0 5px;
}

.reference-group-heading p {
  color: var(--reference-muted);
  font-size: .92rem;
  line-height: 1.55;
  margin: 0;
}

.reference-group-heading span {
  color: #7a8796;
  font-size: .78rem;
  font-weight: 750;
  white-space: nowrap;
}

.reference-card-grid {
  display: grid;
  gap: 13px;
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.reference-card {
  align-items: flex-start;
  background: #fff;
  border: 1px solid var(--reference-line);
  border-radius: 9px;
  color: inherit;
  display: flex;
  gap: 15px;
  min-height: 150px;
  padding: 20px;
  text-decoration: none;
  transition: border-color .18s ease, box-shadow .18s ease, transform .18s ease;
}

.reference-card:hover {
  border-color: #a9bacd;
  box-shadow: 0 12px 28px rgba(16, 35, 63, .09);
  transform: translateY(-2px);
}

.reference-card-icon {
  align-items: center;
  background: #edf3f8;
  border-radius: 8px;
  color: #173f68;
  display: flex;
  flex: 0 0 38px;
  height: 38px;
  justify-content: center;
}

.reference-card-copy {
  min-width: 0;
}

.reference-card-label {
  color: #9c3a3e;
  display: block;
  font-size: .68rem;
  font-weight: 800;
  letter-spacing: .08em;
  margin-bottom: 6px;
  text-transform: uppercase;
}

.reference-card h3 {
  font-size: 1rem;
  line-height: 1.35;
  margin: 0;
}

.reference-card p {
  color: var(--reference-muted);
  font-size: .85rem;
  line-height: 1.55;
  margin: 7px 0 0;
}

.reference-card-source {
  color: #235b8f;
  display: inline-block;
  font-size: .78rem;
  font-weight: 750;
  margin-top: 10px;
}

.reference-empty {
  background: #fff6f3;
  border: 1px solid #e9cbc5;
  border-radius: 8px;
  color: #71393a;
  padding: 18px;
}

.citation-grid {
  display: grid;
  gap: 16px;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  margin-top: 30px;
}

.citation-card {
  background: #fff;
  border: 1px solid var(--reference-line);
  border-radius: 10px;
  padding: 22px;
}

.citation-card code {
  background: #eaf1f8;
  border-radius: 5px;
  color: #133d66;
  display: inline-block;
  font-size: .9rem;
  padding: 6px 8px;
}

.citation-card h3 {
  font-size: 1rem;
  margin: 14px 0 7px;
}

.citation-card p,
.reference-note {
  color: var(--reference-muted);
  font-size: .88rem;
  line-height: 1.65;
  margin: 0;
}

.reference-note {
  border-left: 3px solid #d5a252;
  margin-top: 22px;
  max-width: 840px;
  padding-left: 16px;
}

@media (max-width: 900px) {
  .authority-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .reference-layout { grid-template-columns: 1fr; }
  .reference-nav { display: none; }
}

@media (max-width: 650px) {
  .reference-hero { padding: 54px 0 48px; }
  .reference-section { padding: 50px 0; }
  .authority-grid,
  .citation-grid,
  .reference-card-grid { grid-template-columns: 1fr; }
  .reference-group-heading { align-items: flex-start; flex-direction: column; gap: 6px; }
  .reference-search kbd { display: none; }
  .reference-card { min-height: 0; }
}