:root {
  --reference-hero-min-height: 560px;
  --reference-hero-copy-width: 690px;
  --reference-visual-width: 430px;
  --reference-layout-gap: clamp(28px, 5vw, 72px);
  --reference-hero-gap: clamp(36px, 6vw, 84px);
  --reference-hero-padding: clamp(56px, 8vw, 104px);
  --reference-article-width: 900px;
  --reference-section-space: clamp(72px, 9vw, 112px);
  --reference-card-padding: clamp(22px, 4vw, 38px);
  --reference-small-gap: 10px;
  --reference-grid-gap: 14px;
  --reference-line-size: 1px;
  --reference-node-size: 10px;
  --reference-title-muted-color: var(--color-text-muted);
  --reference-panel-background: var(--color-panel);
  --reference-panel-strong-background: var(--color-panel-strong);
  --reference-card-background: var(--color-canvas);
  --reference-border-color: var(--color-border);
  --reference-divider-color: var(--color-divider);
  --reference-text-color: var(--color-text);
  --reference-muted-color: var(--color-text-muted);
  --reference-success-color: var(--color-accent);
  --reference-info-color: var(--color-info);
  --reference-card-radius: var(--radius-md);
  --reference-small-radius: var(--radius-sm);
  --reference-card-shadow: var(--shadow-card);
}

.reference-hero {
  min-height: var(--reference-hero-min-height);
  border-bottom: var(--reference-line-size) solid var(--reference-border-color);
  padding-top: var(--reference-hero-padding);
  padding-bottom: var(--reference-hero-padding);
  background: var(--color-canvas);
}

.reference-hero-grid {
  display: grid;
  grid-template-columns: minmax(0, var(--reference-hero-copy-width)) minmax(300px, var(--reference-visual-width));
  align-items: center;
  justify-content: space-between;
  gap: var(--reference-hero-gap);
}

.reference-hero h1 {
  max-width: var(--reference-hero-copy-width);
  margin-bottom: 24px;
}

.reference-title-muted {
  display: block;
  color: var(--reference-title-muted-color);
}

.reference-hero .lead {
  margin-bottom: 28px;
}

.reference-facts {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 20px;
  margin: 24px 0 0;
  padding: 0;
  list-style: none;
}

.reference-facts li {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--reference-muted-color);
  font-size: 0.84rem;
}

.reference-map {
  width: 100%;
  padding: var(--reference-card-padding);
}

.reference-map-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--reference-grid-gap);
  margin-bottom: 22px;
  border-bottom: var(--reference-line-size) solid var(--reference-border-color);
  padding-bottom: 16px;
}

.reference-map-head > .mono {
  color: var(--reference-muted-color);
  font-size: 0.7rem;
  letter-spacing: 0.08em;
}

.reference-map-list {
  margin: 0;
  padding: 0;
  list-style: none;
}

.reference-map-list li {
  position: relative;
  display: grid;
  grid-template-columns: 74px 1fr;
  gap: 2px 14px;
  border-bottom: var(--reference-line-size) solid var(--reference-border-color);
  padding: 15px 0 15px 20px;
}

.reference-map-list li:last-child {
  border-bottom: 0;
}

.reference-map-list li::before {
  position: absolute;
  top: 22px;
  left: 0;
  width: var(--reference-node-size);
  height: var(--reference-node-size);
  border-radius: var(--radius-pill);
  background: var(--reference-success-color);
  content: "";
}

.reference-map-list .mono {
  grid-row: 1 / span 2;
  color: var(--reference-muted-color);
  font-size: 0.65rem;
  letter-spacing: 0.05em;
}

.reference-map-list strong {
  font-size: 0.95rem;
}

.reference-map-list p {
  margin: 3px 0 0;
  color: var(--reference-muted-color);
  font-size: 0.8rem;
  line-height: 1.6;
}

.reference-layout {
  display: grid;
  grid-template-columns: minmax(0, var(--reference-article-width));
  justify-content: center;
  padding-top: clamp(48px, 7vw, 80px);
  padding-bottom: var(--reference-section-space);
}

.reference-article {
  min-width: 0;
}

.reference-intro {
  margin-bottom: 42px;
}

.reference-intro h2 {
  margin-bottom: 22px;
}

.reference-intro > p:not(.eyebrow) {
  color: var(--reference-muted-color);
  font-size: 1.04rem;
  line-height: 1.9;
}

.reference-intro .callout {
  margin-top: 28px;
}

.reference-article .toc-tabs {
  margin-bottom: 6px;
}

.reference-section {
  padding-top: var(--reference-section-space);
  padding-bottom: 8px;
}

.reference-section + .reference-section {
  border-top: var(--reference-line-size) solid var(--reference-border-color);
}

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

.reference-section h3 {
  margin-top: 42px;
  margin-bottom: 14px;
  font-size: clamp(21px, 2.4vw, 27px);
}

.reference-section p,
.reference-section li {
  font-size: 1rem;
  line-height: 1.88;
}

.reference-section > p:not(.section-code),
.reference-section > ul,
.reference-section > ol {
  color: var(--reference-muted-color);
}

.reference-section strong {
  color: var(--reference-text-color);
}

.section-code {
  margin-bottom: 12px;
  color: var(--reference-muted-color);
  font-size: 0.7rem;
  font-weight: 650;
  letter-spacing: 0.08em;
}

.reference-section .table-scroll {
  margin-top: 30px;
  margin-bottom: 34px;
}

.reference-section .compare-table,
.reference-section .data-table {
  min-width: 760px;
}

.reference-section .compare-table td,
.reference-section .data-table td {
  color: var(--reference-muted-color);
  font-size: 0.86rem;
  line-height: 1.6;
}

.reference-section .compare-table td:first-child,
.reference-section .data-table td:first-child {
  color: var(--reference-text-color);
  font-family: var(--font-mono);
  font-size: 0.78rem;
}

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

.reference-section pre {
  margin-top: 30px;
  margin-bottom: 18px;
}

.topology-flow {
  display: grid;
  grid-template-columns: minmax(140px, 1fr) auto minmax(140px, 1fr) auto minmax(140px, 1fr) auto minmax(140px, 1fr);
  align-items: center;
  gap: var(--reference-small-gap);
  max-width: 100%;
  margin-top: 34px;
  overflow-x: auto;
  padding-bottom: 8px;
  -webkit-overflow-scrolling: touch;
}

.topology-node {
  min-width: 150px;
  min-height: 150px;
  border: var(--reference-line-size) solid var(--reference-border-color);
  border-radius: var(--reference-small-radius);
  padding: 19px;
  background: var(--reference-card-background);
}

.topology-node .mono {
  display: block;
  margin-bottom: 20px;
  color: var(--reference-muted-color);
  font-size: 0.65rem;
  letter-spacing: 0.06em;
}

.topology-node strong {
  display: block;
  margin-bottom: 7px;
}

.topology-node p {
  margin-bottom: 0;
  color: var(--reference-muted-color);
  font-size: 0.8rem;
  line-height: 1.55;
}

.topology-arrow {
  color: var(--reference-info-color);
  font-family: var(--font-mono);
  font-weight: 700;
}

.decision-board {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--reference-grid-gap);
  margin-top: 34px;
  margin-bottom: 38px;
}

.decision-board article {
  min-width: 0;
  border: var(--reference-line-size) solid var(--reference-border-color);
  border-radius: var(--reference-small-radius);
  padding: 22px;
  background: var(--reference-panel-background);
}

.decision-board .mono {
  display: block;
  margin-bottom: 18px;
  color: var(--reference-muted-color);
  font-size: 0.67rem;
  letter-spacing: 0.07em;
}

.decision-board h3 {
  margin: 0 0 8px;
  font-size: 1.1rem;
}

.decision-board p {
  margin-bottom: 0;
  color: var(--reference-muted-color);
  font-size: 0.86rem;
  line-height: 1.65;
}

.reference-next {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: center;
  gap: 34px;
  margin-top: var(--reference-section-space);
  border: var(--reference-line-size) solid var(--reference-border-color);
  border-radius: var(--reference-card-radius);
  padding: var(--reference-card-padding);
  background: var(--reference-panel-background);
  box-shadow: var(--reference-card-shadow);
}

.reference-next h2 {
  margin-bottom: 10px;
  font-size: clamp(27px, 4vw, 40px);
}

.reference-next p:not(.eyebrow) {
  max-width: 580px;
  margin-bottom: 0;
  color: var(--reference-muted-color);
}

.reference-next .button-row {
  justify-content: flex-end;
}

@media (max-width: 980px) {
  .reference-hero-grid {
    grid-template-columns: 1fr;
  }

  .reference-map {
    max-width: 720px;
  }

  .reference-hero-copy {
    max-width: 760px;
  }
}

@media (max-width: 760px) {
  .reference-hero {
    min-height: auto;
  }

  .reference-map-list li {
    grid-template-columns: 66px 1fr;
  }

  .decision-board {
    grid-template-columns: 1fr;
  }

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

  .reference-next .button-row {
    justify-content: flex-start;
  }
}

@media (max-width: 640px) {
  .reference-hero {
    padding-top: 44px;
    padding-bottom: 44px;
  }

  .reference-hero-grid {
    gap: 36px;
  }

  .reference-map {
    padding: 20px 18px;
  }

  .reference-map-head {
    align-items: flex-start;
    flex-direction: column;
  }

  .reference-layout {
    padding-top: 38px;
  }

  .reference-section {
    padding-top: 64px;
  }

  .reference-section h3 {
    margin-top: 34px;
  }

  .reference-next {
    padding: 24px 20px;
  }

  .topology-flow {
    grid-template-columns: minmax(150px, 1fr) auto minmax(150px, 1fr) auto minmax(150px, 1fr) auto minmax(150px, 1fr);
  }
}