.doc-hero {
  position: relative;
  overflow-x: clip;
  border-bottom: 1px solid var(--color-border-soft);
  background:
    linear-gradient(var(--color-grid) 1px, var(--color-transparent) 1px),
    linear-gradient(90deg, var(--color-grid) 1px, var(--color-transparent) 1px),
    linear-gradient(180deg, var(--color-panel-raised), var(--color-bg));
  background-size: 48px 48px, 48px 48px, auto;
}

.doc-hero::after {
  position: absolute;
  top: -260px;
  left: 50%;
  width: min(980px, 92vw);
  height: 520px;
  border: 1px solid var(--color-accent-line);
  border-radius: var(--radius-pill);
  content: "";
  background: radial-gradient(ellipse at center, var(--color-accent-haze), var(--color-transparent));
  transform: translateX(-50%);
  pointer-events: none;
}

.doc-hero-inner {
  position: relative;
  z-index: 1;
  padding-top: clamp(72px, 10vw, 126px);
  padding-bottom: clamp(56px, 8vw, 96px);
}

.doc-hero h1 {
  max-width: 850px;
  margin: 22px 0 20px;
}

.doc-lead {
  max-width: 790px;
  margin-bottom: 0;
  color: var(--color-text-muted);
  font-size: clamp(17px, 2.2vw, 21px);
  line-height: 1.8;
}

.doc-meta {
  margin-top: 26px;
  display: flex;
  flex-wrap: wrap;
  border-top: 1px solid var(--color-border-soft);
  border-bottom: 1px solid var(--color-border-soft);
}

.doc-meta span {
  position: relative;
  min-height: 40px;
  display: inline-flex;
  align-items: center;
  padding: 0 15px;
  color: var(--color-text-dim);
  font-family: var(--font-mono);
  font-size: 11px;
}

.doc-meta span + span::before {
  position: absolute;
  top: 10px;
  bottom: 10px;
  left: 0;
  width: 1px;
  content: "";
  background: var(--color-border-soft);
}

.doc-intro-callout {
  max-width: 850px;
  margin-bottom: 0;
}

.toc-host {
  position: relative;
  z-index: 60;
  padding-top: 22px;
  padding-bottom: 0;
}

.doc-article {
  padding-top: 20px;
  padding-bottom: var(--section-space);
}

.doc-section {
  padding-top: clamp(74px, 10vw, 116px);
  padding-bottom: clamp(58px, 8vw, 92px);
  border-bottom: 1px solid var(--color-border-soft);
}

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

.doc-section .section-kicker {
  margin-bottom: 18px;
}

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

.doc-section h3 {
  margin-top: 2.5rem;
  margin-bottom: 0.9rem;
  font-size: clamp(1.2rem, 2vw, 1.5rem);
}

.doc-section p {
  margin-bottom: 1.25rem;
  line-height: 1.9;
}

.doc-section .table-scroll {
  margin-top: 32px;
  margin-bottom: 34px;
}

.doc-section .data-table {
  color: var(--color-text-muted);
  font-size: 13px;
}

.protocol-table {
  min-width: 820px;
}

.route-ledger {
  margin: 38px 0;
  border-top: 1px solid var(--color-border);
  border-right: 1px solid var(--color-border-soft);
  border-left: 1px solid var(--color-border-soft);
}

.route-ledger-row {
  display: grid;
  grid-template-columns: 130px minmax(0, 1fr);
  border-bottom: 1px solid var(--color-border-soft);
  background: var(--color-panel);
}

.route-ledger-state {
  min-height: 100%;
  display: flex;
  align-items: flex-start;
  padding: 25px 18px;
  border-right: 1px solid var(--color-border-soft);
  color: var(--color-accent);
  font-size: 11px;
  letter-spacing: 0.08em;
}

.route-ledger-row > div:last-child {
  padding: 22px 24px;
}

.route-ledger-row h3 {
  margin: 0 0 7px;
  font-size: 18px;
}

.route-ledger-row p {
  margin: 0;
  font-size: 14px;
}

.selection-matrix {
  margin: 38px 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  border-top: 1px solid var(--color-border);
  border-left: 1px solid var(--color-border);
}

.selection-matrix article {
  min-width: 0;
  padding: 26px;
  border-right: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
  background: var(--color-panel);
}

.selection-matrix .mono {
  color: var(--color-accent);
  font-size: 10px;
  letter-spacing: 0.1em;
}

.selection-matrix h3 {
  margin: 14px 0 8px;
  font-size: 18px;
}

.selection-matrix p {
  margin: 0;
  font-size: 14px;
}

.reference-next {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: end;
  gap: 38px;
  padding: clamp(26px, 5vw, 48px);
  border: 1px solid var(--color-accent-line);
  background: linear-gradient(110deg, var(--color-panel-raised), var(--color-panel));
}

.reference-next h2 {
  margin: 17px 0 12px;
  font-size: clamp(28px, 4vw, 42px);
}

.reference-next p {
  max-width: 690px;
  margin-bottom: 0;
  color: var(--color-text-muted);
}

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

@media (max-width: 900px) {
  .reference-next {
    grid-template-columns: minmax(0, 1fr);
    align-items: start;
  }

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

@media (max-width: 768px) {
  .doc-hero::after {
    top: -200px;
    height: 400px;
  }

  .doc-meta {
    align-items: stretch;
    flex-direction: column;
  }

  .doc-meta span + span::before {
    top: 0;
    right: 0;
    bottom: auto;
    height: 1px;
    width: auto;
  }

  .toc-host {
    padding-inline: 0;
  }

  .toc-host .toc-tabs {
    padding-inline: var(--gutter);
  }

  .selection-matrix {
    grid-template-columns: minmax(0, 1fr);
  }
}

@media (max-width: 640px) {
  .doc-hero-inner {
    padding-top: 58px;
    padding-bottom: 58px;
  }

  .doc-lead {
    font-size: 16px;
  }

  .doc-section {
    padding-top: 70px;
    padding-bottom: 58px;
  }

  .route-ledger-row {
    grid-template-columns: minmax(0, 1fr);
  }

  .route-ledger-state {
    min-height: 38px;
    padding: 11px 16px;
    border-right: 0;
    border-bottom: 1px solid var(--color-border-soft);
  }

  .route-ledger-row > div:last-child {
    padding: 20px;
  }

  .selection-matrix article {
    padding: 22px 20px;
  }

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

  .reference-next .button-row {
    width: 100%;
  }

  .reference-next .button {
    flex: 1 1 150px;
  }
}