.doc-hero {
  position: relative;
  overflow: hidden;
  padding-top: clamp(64px, 8vw, 104px);
  padding-bottom: clamp(58px, 8vw, 92px);
  background:
    radial-gradient(circle at 14% 18%, var(--color-mint-glow), transparent 38%),
    radial-gradient(circle at 86% 78%, var(--color-sky-glow), transparent 40%),
    linear-gradient(135deg, var(--color-bg), var(--color-panel-soft));
  border-bottom: 1px solid var(--color-border);
}

.doc-hero::before {
  position: absolute;
  inset: 0;
  pointer-events: none;
  content: "";
  background-image:
    linear-gradient(var(--color-border) 1px, transparent 1px),
    linear-gradient(90deg, var(--color-border) 1px, transparent 1px);
  background-size: 48px 48px;
  opacity: .3;
  mask-image: linear-gradient(to bottom, transparent, var(--color-text), transparent);
}

.doc-hero-grid {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1.08fr) minmax(320px, .92fr);
  align-items: center;
  gap: clamp(42px, 7vw, 86px);
}

.doc-hero-copy {
  min-width: 0;
}

.doc-hero-copy h1 {
  max-width: 760px;
  margin-top: 20px;
}

.doc-lead {
  max-width: 760px;
  margin-bottom: 28px;
  font-size: clamp(17px, 2vw, 20px);
}

.doc-lead a {
  color: var(--color-accent-dark);
  font-weight: 750;
  text-decoration: underline;
  text-underline-offset: 3px;
}

.doc-scope {
  display: flex;
  flex-wrap: wrap;
  gap: 9px;
  margin-top: 28px;
}

.doc-scope a {
  max-width: 100%;
  display: inline-flex;
  align-items: center;
  min-height: 34px;
  padding-inline: 13px;
  overflow: hidden;
  color: var(--color-muted);
  background: var(--color-panel);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-pill);
  box-shadow: var(--shadow-soft);
  font-size: 12px;
  font-weight: 700;
  transition: color var(--transition-fast), border-color var(--transition-fast), transform var(--transition-fast);
}

.doc-scope a:hover {
  color: var(--color-accent-dark);
  border-color: var(--color-accent);
  transform: translateY(-1px);
}

.doc-map {
  position: relative;
  min-width: 0;
  padding: clamp(22px, 4vw, 34px);
}

.doc-map::after {
  position: absolute;
  top: -14px;
  right: 26px;
  width: 90px;
  height: 30px;
  content: "";
  background: var(--color-accent-soft);
  border: 1px solid var(--color-accent);
  border-radius: var(--radius-pill);
  transform: rotate(4deg);
}

.doc-map-head {
  display: grid;
  gap: 2px;
  margin-bottom: 24px;
}

.doc-map-head span {
  color: var(--color-accent-dark);
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
}

.doc-map-head strong {
  font-size: 21px;
}

.doc-map ol {
  display: grid;
  gap: 0;
  margin: 0;
  padding: 0;
  list-style: none;
}

.doc-map li {
  position: relative;
  min-width: 0;
  display: grid;
  grid-template-columns: 40px minmax(0, 1fr);
  gap: 13px;
  padding-bottom: 22px;
}

.doc-map li:last-child {
  padding-bottom: 0;
}

.doc-map li::before {
  position: absolute;
  top: 32px;
  bottom: 2px;
  left: 19px;
  width: 1px;
  content: "";
  background: var(--color-border);
}

.doc-map li:last-child::before {
  display: none;
}

.doc-map li > span {
  width: 40px;
  height: 40px;
  display: grid;
  place-items: center;
  color: var(--color-accent-dark);
  background: var(--color-accent-soft);
  border: 1px solid var(--color-accent);
  border-radius: var(--radius-md);
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 800;
}

.doc-map li div {
  min-width: 0;
  padding-top: 1px;
}

.doc-map li strong,
.doc-map li small {
  display: block;
}

.doc-map li small {
  margin-top: 3px;
  color: var(--color-muted);
  font-size: 12px;
  line-height: 1.55;
}

.doc-main {
  padding-top: 42px;
  padding-bottom: var(--section-space);
}

.doc-main .toc-tabs {
  top: calc(var(--header-height) + 10px);
}

.doc-article {
  max-width: 900px;
  margin-inline: auto;
}

.doc-chapter {
  padding-top: clamp(54px, 8vw, 86px);
  padding-bottom: clamp(54px, 8vw, 86px);
  border-bottom: 1px solid var(--color-border);
  scroll-margin-top: calc(var(--header-height) + 82px);
}

.doc-chapter:first-child {
  padding-top: 30px;
}

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

.chapter-kicker {
  margin-bottom: 12px;
  color: var(--color-accent-dark);
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 800;
  letter-spacing: .06em;
  text-transform: uppercase;
}

.doc-chapter h2 {
  max-width: 780px;
  margin-top: 0;
}

.doc-chapter h3 {
  margin-top: 42px;
  padding-top: 2px;
}

.doc-chapter p {
  font-size: 16px;
  line-height: 1.9;
}

.doc-chapter .table-scroll {
  margin-block: 30px;
  background: var(--color-panel);
  box-shadow: var(--shadow-soft);
}

.doc-chapter table {
  min-width: 680px;
}

.doc-chapter th {
  white-space: nowrap;
}

.doc-chapter pre {
  margin-block: 28px;
  box-shadow: var(--shadow-soft);
}

.doc-chapter .callout {
  margin-block: 30px;
}

.doc-next {
  max-width: 900px;
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: center;
  gap: 30px;
  margin: 36px auto 0;
  padding: clamp(24px, 5vw, 40px);
  background: var(--color-panel);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-card);
}

.doc-next h2 {
  margin-bottom: 12px;
  font-size: clamp(25px, 3vw, 32px);
}

.doc-next p {
  max-width: 620px;
  margin-bottom: 0;
}

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

@media (max-width: 860px) {
  .doc-hero-grid {
    grid-template-columns: 1fr;
  }

  .doc-map {
    max-width: 640px;
  }

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

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

@media (max-width: 640px) {
  .doc-hero {
    padding-top: 52px;
    padding-bottom: 56px;
  }

  .doc-hero-grid {
    gap: 38px;
  }

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

  .doc-map {
    padding: 20px;
  }

  .doc-map::after {
    right: 18px;
    width: 68px;
  }

  .doc-main {
    padding-top: 24px;
  }

  .doc-main .toc-tabs {
    top: 8px;
  }

  .doc-chapter {
    padding-top: 56px;
    padding-bottom: 56px;
  }

  .doc-chapter:first-child {
    padding-top: 22px;
  }

  .doc-chapter h3 {
    margin-top: 34px;
  }

  .doc-chapter p {
    font-size: 15.5px;
    line-height: 1.85;
  }

  .doc-next {
    margin-top: 20px;
  }
}