:root {
  --doc-hero-space: 86px;
  --doc-layout-gap: 54px;
  --doc-rail-width: 214px;
  --doc-section-gap: 84px;
  --doc-copy-gap: 1.05em;
  --doc-rule-width: 2px;
  --doc-table-min: 760px;
  --doc-marker-size: 10px;
  --doc-related-gap: 14px;
}

.doc-hero {
  position: relative;
  padding-top: var(--doc-hero-space);
  padding-bottom: var(--doc-hero-space);
  border-bottom: 1px solid var(--color-border);
  background: var(--color-bg);
}

.doc-hero::before {
  position: absolute;
  inset: auto 0 0;
  height: var(--doc-rule-width);
  background: var(--color-accent);
  content: "";
  opacity: .18;
}

.doc-hero h1 {
  max-width: 820px;
  margin-top: 22px;
  margin-bottom: 28px;
}

.doc-hero .lead {
  max-width: 800px;
}

.doc-hero-links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 28px;
}

.doc-facts {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  max-width: 820px;
  margin: 42px 0 0;
  padding: 0;
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
  list-style: none;
}

.doc-facts li {
  min-width: 0;
  padding: 18px 20px;
  border-left: 1px solid var(--color-border);
}

.doc-facts li:first-child {
  border-left: 0;
}

.doc-facts strong,
.doc-facts span {
  display: block;
}

.doc-facts strong {
  color: var(--color-text);
  font-family: var(--font-display);
  font-weight: 850;
}

.doc-facts span {
  margin-top: 3px;
  color: var(--color-muted);
  font-family: var(--font-mono);
  font-size: 11px;
}

.doc-layout {
  display: grid;
  grid-template-columns: var(--doc-rail-width) minmax(0, var(--reading-width));
  gap: var(--doc-layout-gap);
  justify-content: center;
  align-items: start;
  padding-top: var(--section-space);
  padding-bottom: var(--section-space);
}

.doc-rail {
  position: sticky;
  top: var(--toc-offset);
  border-top: var(--doc-rule-width) solid var(--color-accent);
  padding-top: 18px;
  color: var(--color-muted);
  font-size: 13px;
}

.doc-rail .mono {
  margin-bottom: 12px;
  color: var(--color-accent-dark);
  font-size: 11px;
  font-weight: 800;
}

.doc-rail a {
  color: var(--color-accent-dark);
  font-weight: 750;
}

.doc-article {
  width: 100%;
  max-width: var(--reading-width);
}

.doc-intro {
  margin-bottom: 34px;
  font-size: 17px;
}

.doc-intro > p {
  color: var(--color-text);
}

.doc-section {
  position: relative;
  padding-top: var(--doc-section-gap);
}

.doc-section::before {
  position: absolute;
  top: var(--doc-section-gap);
  left: -29px;
  width: var(--doc-marker-size);
  height: var(--doc-marker-size);
  border: var(--doc-rule-width) solid var(--color-accent);
  border-radius: var(--radius-xs);
  background: var(--color-bg);
  content: "";
  transform: rotate(45deg);
}

.doc-section::after {
  position: absolute;
  top: calc(var(--doc-section-gap) + var(--doc-marker-size));
  bottom: calc(var(--doc-section-gap) * -1);
  left: -25px;
  border-left: 1px dashed var(--color-border);
  content: "";
}

.doc-section:last-of-type::after {
  display: none;
}

.section-flag {
  display: block;
  margin-bottom: 12px;
  color: var(--color-accent-dark);
  font-size: 11px;
  font-weight: 800;
  letter-spacing: .04em;
}

.doc-section h2 {
  margin-bottom: 34px;
}

.doc-section h3 {
  margin-top: 40px;
  margin-bottom: 15px;
  font-size: 23px;
}

.doc-section p {
  margin-bottom: var(--doc-copy-gap);
  line-height: 1.92;
}

.doc-section .table-scroll {
  margin-top: 28px;
  margin-bottom: 34px;
}

.doc-section .data-table,
.doc-section .compare-table {
  min-width: var(--doc-table-min);
}

.doc-section pre {
  margin-top: 24px;
  margin-bottom: 24px;
}

.doc-section code {
  font-size: 13px;
  line-height: 1.75;
}

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

.related-docs {
  margin-top: var(--section-space);
  padding-top: 42px;
  border-top: 1px solid var(--color-border);
}

.related-docs h2 {
  margin-top: 12px;
  margin-bottom: 26px;
}

.related-grid {
  display: grid;
  gap: var(--doc-related-gap);
}

.related-link {
  display: grid;
  grid-template-columns: minmax(150px, .45fr) minmax(0, 1fr);
  gap: 22px;
  align-items: center;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 20px 22px;
  background: var(--color-bg);
  transition: border-color var(--transition-fast), transform var(--transition-fast), box-shadow var(--transition-fast);
}

.related-link:hover {
  border-color: var(--color-accent);
  box-shadow: var(--shadow-card);
  transform: translateY(-1px);
}

.related-link strong {
  color: var(--color-text);
}

.related-link span {
  color: var(--color-muted);
  font-size: 14px;
}

@media (max-width: 980px) {
  .doc-layout {
    grid-template-columns: minmax(0, var(--reading-width));
  }

  .doc-rail {
    position: static;
    display: grid;
    grid-template-columns: auto minmax(0, 1fr) auto;
    gap: 18px;
    align-items: start;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: 18px;
    background: var(--color-panel);
  }

  .doc-rail .mono,
  .doc-rail p {
    margin-bottom: 0;
  }

  .doc-section::before,
  .doc-section::after {
    display: none;
  }
}

@media (max-width: 768px) {
  :root {
    --doc-hero-space: 62px;
    --doc-section-gap: 68px;
  }

  .doc-facts {
    grid-template-columns: 1fr;
  }

  .doc-facts li {
    border-top: 1px solid var(--color-border);
    border-left: 0;
  }

  .doc-facts li:first-child {
    border-top: 0;
  }

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

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

  .related-link {
    grid-template-columns: 1fr;
    gap: 5px;
  }
}

@media (max-width: 480px) {
  .doc-hero-links {
    align-items: stretch;
  }

  .doc-hero-links .btn-secondary {
    width: 100%;
  }

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

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

  .doc-section p {
    line-height: 1.84;
  }
}