.reference-hero {
  position: relative;
  overflow: hidden;
  overflow-x: clip;
  padding-top: 96px;
  padding-bottom: 80px;
  border-bottom: 1px solid var(--color-border-soft);
  isolation: isolate;
}

.reference-hero::before {
  position: absolute;
  z-index: -2;
  inset: 0;
  background-image:
    linear-gradient(30deg, transparent 48%, var(--color-grid) 49%, var(--color-grid) 51%, transparent 52%),
    linear-gradient(150deg, transparent 48%, var(--color-grid) 49%, var(--color-grid) 51%, transparent 52%);
  background-size: 46px 80px;
  content: "";
  mask-image: linear-gradient(to bottom, var(--color-bg), transparent);
}

.reference-hero::after {
  position: absolute;
  z-index: -1;
  top: -240px;
  right: -180px;
  width: 680px;
  height: 680px;
  border-radius: 50%;
  background: radial-gradient(circle, var(--color-accent-glow), transparent 68%);
  content: "";
  pointer-events: none;
}

.reference-hero h1 {
  max-width: 820px;
}

.reference-intro {
  max-width: var(--reading-width);
  margin-top: 24px;
  color: var(--color-text-muted);
  font-size: 19px;
  line-height: 1.8;
}

.reference-facts {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 28px;
}

.reference-bridge {
  max-width: var(--reading-width);
  margin-top: 24px;
  padding-top: 22px;
  border-top: 1px solid var(--color-border-soft);
  color: var(--color-text-muted);
}

.reference-bridge a {
  color: var(--color-accent);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.reference-document {
  padding-top: 34px;
  padding-bottom: var(--section-space);
}

.reference-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 270px;
  align-items: start;
  gap: 56px;
}

.reference-content {
  max-width: var(--reading-width);
}

.reference-section {
  padding-top: 44px;
  padding-bottom: 64px;
  border-bottom: 1px solid var(--color-border-soft);
}

.reference-section:first-child {
  padding-top: 12px;
}

.reference-section:last-child {
  border-bottom: 0;
}

.reference-section h2 {
  margin-top: 0;
  margin-bottom: 30px;
}

.reference-section h3 {
  margin-top: 38px;
  color: var(--color-text);
  font-size: 23px;
}

.reference-section h3 + p,
.reference-section h3 + .table-scroll {
  margin-top: 14px;
}

.reference-section p {
  overflow-wrap: break-word;
}

.reference-section .callout,
.reference-section .decision-card,
.reference-section .table-scroll,
.reference-section .reference-summary {
  margin-top: 28px;
  margin-bottom: 28px;
}

.reference-section .table-scroll {
  background: var(--color-panel);
}

.reference-section table {
  margin-top: 0;
}

.reference-section pre {
  margin-top: 14px;
  font-size: 13px;
  line-height: 1.7;
}

.decision-card {
  padding: 22px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-panel);
  background: var(--color-panel);
  box-shadow: var(--shadow-tile);
}

.decision-title {
  color: var(--color-text);
  font-weight: 750;
}

.reference-summary {
  padding: 28px;
  border: 1px solid var(--color-accent);
  border-radius: var(--radius-panel);
  background: var(--color-panel-raised);
  box-shadow: var(--shadow-window);
}

.reference-summary h3 {
  margin-top: 0;
}

.reference-summary p {
  margin-top: 12px;
}

.reference-rail {
  position: sticky;
  top: calc(var(--header-height) + 84px);
  display: grid;
  gap: 18px;
}

.rail-panel {
  padding: 22px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-panel);
  background: var(--color-panel);
  box-shadow: var(--shadow-tile);
}

.rail-label {
  margin-bottom: 18px;
  color: var(--color-accent);
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.12em;
}

.rail-panel dl {
  display: grid;
  gap: 16px;
}

.rail-panel dl div {
  padding-bottom: 16px;
  border-bottom: 1px solid var(--color-border-soft);
}

.rail-panel dl div:last-child {
  padding-bottom: 0;
  border-bottom: 0;
}

.rail-panel dt {
  color: var(--color-text);
  font-weight: 700;
}

.rail-panel dd {
  margin-top: 4px;
  color: var(--color-text-muted);
  font-size: 13px;
  line-height: 1.6;
}

.rail-links {
  display: grid;
  gap: 6px;
}

.rail-links a {
  display: flex;
  min-height: 44px;
  align-items: center;
  padding: 8px 10px;
  border-radius: var(--radius-small);
  color: var(--color-text-muted);
}

.rail-links a::after {
  margin-left: auto;
  color: var(--color-accent);
  content: "→";
}

.rail-links a:hover {
  background: var(--color-panel-raised);
  color: var(--color-text);
}

@media (max-width: 1040px) {
  .reference-layout {
    grid-template-columns: minmax(0, 1fr);
  }

  .reference-content {
    max-width: var(--reading-width);
    margin-inline: auto;
  }

  .reference-rail {
    position: static;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    max-width: var(--reading-width);
    margin-inline: auto;
  }
}

@media (max-width: 768px) {
  .reference-hero {
    padding-top: 64px;
    padding-bottom: 56px;
  }

  .reference-intro {
    font-size: 17px;
  }

  .reference-document {
    min-width: 0;
    padding-top: 24px;
    padding-inline: var(--gutter);
  }

  .reference-layout,
  .reference-content,
  .reference-section,
  .decision-card {
    width: 100%;
    min-width: 0;
    max-width: 100%;
  }

  .reference-content {
    overflow: hidden;
  }

  .reference-section pre {
    max-width: 100%;
    overflow-x: auto;
  }

  .reference-section pre code {
    white-space: pre;
  }

  .reference-section {
    padding-top: 34px;
    padding-bottom: 52px;
  }

  .reference-section h3 {
    font-size: 21px;
  }

  .reference-rail {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 520px) {
  .reference-facts {
    display: grid;
  }

  .reference-facts .fact-chip {
    width: 100%;
    justify-content: flex-start;
  }

  .reference-section h2 {
    margin-bottom: 24px;
  }

  .decision-card,
  .reference-summary {
    padding: 20px;
  }

  .reference-section pre {
    font-size: 12px;
  }
}