.references-layout,
.ref-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 240px;
  gap: 24px;
}

.references-hero::before,
.references-hero::after {
  display: none;
}

.references-content,
.ref-section,
.principle-card,
.ref-formula-card,
.ref-sidebar {
  background: rgba(255,255,255,0.82);
  border: var(--border-card);
  box-shadow: var(--shadow-sm);
}

.ref-section {
  border-radius: 32px;
  padding: 26px;
  margin-bottom: 20px;
}

.ref-section-title {
  margin-bottom: 10px;
}

.ref-section-intro {
  margin-bottom: 20px;
}

.principles-grid,
.formulas-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
}

.principle-card,
.ref-formula-card {
  border-radius: 26px;
  padding: 22px;
}

.principle-number {
  font-size: 2rem;
  color: var(--retro-blue);
  opacity: 0.7;
  margin-bottom: 10px;
}

.principle-text,
.ref-formula-text {
  color: var(--text-primary);
}

.principle-context-toggle {
  margin-top: 12px;
  background: none;
  border: 0;
  color: var(--retro-blue);
  cursor: pointer;
}

.principle-context {
  display: none;
  margin-top: 14px;
  padding: 16px;
  border-radius: 18px;
  background: var(--bg-surface-muted);
}

.principle-context.open {
  display: block;
}

.ref-sidebar,
.references-sidebar {
  position: sticky;
  top: 110px;
  border-radius: 28px;
  padding: 20px;
  align-self: start;
  background: rgba(255,255,255,0.82);
  border: var(--border-card);
  box-shadow: var(--shadow-sm);
}

.ref-sidebar-title {
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-muted);
  margin-bottom: 10px;
}

.ref-sidebar-link {
  display: flex;
  align-items: center;
  padding: 10px 14px;
  border-radius: 16px;
  color: var(--text-secondary);
}

.ref-sidebar-link.active,
.ref-sidebar-link:hover {
  background: var(--bg-surface-muted);
  color: var(--text-primary);
}

.ref-ai-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
}

@media (max-width: 1024px) {
  .references-layout,
  .ref-layout,
  .principles-grid,
  .formulas-grid,
  .ref-ai-grid {
    grid-template-columns: 1fr;
  }

  .ref-sidebar,
  .references-sidebar {
    display: none;
  }
}

.verification-mini {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-bottom: 4px;
}

.verification-mini-card {
  padding: 10px 14px;
  border-radius: 14px;
  background: var(--bg-surface-muted);
  border: var(--border-card);
}

.verification-mini-card h4 {
  font-size: var(--text-xs);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-muted);
  font-weight: var(--font-semibold);
}

.verification-mini-card p {
  margin-top: 4px;
  font-size: var(--text-sm);
  color: var(--text-secondary);
}

.ref-sidebar-divider {
  height: 1px;
  background: rgba(23, 23, 23, 0.08);
  margin: 14px 0;
}

.ref-sidebar-nav {
  display: flex;
  flex-direction: column;
  gap: 2px;
}