.doc-hero {
  max-width: 100%;
  padding-top: clamp(56px, 8vw, 96px);
  padding-bottom: clamp(56px, 8vw, 96px);
  overflow-x: clip;
  border-bottom: 1px solid var(--color-line);
}

.doc-hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.45fr) minmax(280px, .72fr);
  align-items: center;
  gap: clamp(32px, 7vw, 84px);
}

.doc-hero-copy {
  max-width: 780px;
}

.doc-hero-copy h1 {
  max-width: 760px;
  margin-top: 22px;
}

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

.doc-scope {
  position: relative;
  overflow: hidden;
  border-color: var(--color-accent);
}

.doc-scope::before {
  position: absolute;
  top: 0;
  right: 0;
  left: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--color-accent), var(--color-coral));
  content: "";
}

.doc-scope h2 {
  margin-bottom: 28px;
  font-size: clamp(28px, 3vw, 38px);
}

.scope-list {
  display: grid;
  gap: 0;
  margin: 0;
}

.scope-list div {
  padding-top: 18px;
  padding-bottom: 18px;
  border-top: 1px solid var(--color-line);
}

.scope-list dt {
  margin-bottom: 5px;
  color: var(--color-accent-deep);
  font: 750 12px/1.3 var(--font-mono);
  letter-spacing: .08em;
}

.scope-list dd {
  margin: 0;
  color: var(--color-muted);
  font-size: 14px;
}

.doc-intro {
  border-bottom: 1px solid var(--color-line);
  background: var(--color-panel);
}

.doc-intro p {
  color: var(--color-muted);
  font-size: 17px;
}

.doc-intro p:last-child {
  margin-bottom: 0;
}

.deep-reference {
  padding-top: clamp(48px, 7vw, 80px);
  padding-bottom: var(--section-space);
}

.deep-reference .toc-tabs {
  top: calc(var(--header-height) + 8px);
}

.doc-chapter {
  max-width: 900px;
  margin-inline: auto;
  padding-top: clamp(48px, 7vw, 76px);
  padding-bottom: clamp(34px, 5vw, 54px);
  border-bottom: 1px solid var(--color-line);
}

.doc-chapter:first-of-type {
  padding-top: 24px;
}

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

.doc-chapter h2 {
  margin-top: 0;
}

.doc-chapter h3 {
  position: relative;
  padding-left: 18px;
}

.doc-chapter h3::before {
  position: absolute;
  top: .28em;
  bottom: .2em;
  left: 0;
  width: 3px;
  border-radius: var(--radius-xs);
  background: linear-gradient(180deg, var(--color-accent), var(--color-coral));
  content: "";
}

.doc-chapter p,
.doc-chapter li {
  font-size: 16px;
  line-height: 1.85;
}

.doc-chapter .comparison-table-wrap {
  margin-top: 30px;
  margin-bottom: 34px;
  box-shadow: var(--shadow-card);
}

.doc-chapter .comparison-table {
  min-width: 820px;
}

.doc-chapter .comparison-table th {
  font-size: 13px;
}

.doc-chapter .comparison-table td {
  color: var(--color-muted);
  line-height: 1.6;
}

.doc-chapter .callout {
  margin-top: 34px;
  margin-bottom: 38px;
}

.doc-chapter code {
  padding: 2px 5px;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-xs);
  background: var(--color-panel);
  font-size: .9em;
}

@media (max-width: 900px) {
  .doc-hero-grid {
    grid-template-columns: minmax(0, 1fr);
  }

  .doc-scope {
    max-width: 680px;
  }
}

@media (max-width: 768px) {
  .doc-hero {
    padding-top: 48px;
    padding-bottom: 52px;
  }

  .deep-reference {
    padding-top: 34px;
  }

  .deep-reference .toc-tabs {
    top: 6px;
  }

  .doc-chapter {
    padding-top: 48px;
  }

  .doc-chapter p,
  .doc-chapter li {
    font-size: 15.5px;
    line-height: 1.78;
  }
}

@media (max-width: 640px) {
  .doc-hero-copy .button-row {
    width: 100%;
  }

  .doc-scope {
    padding: 24px;
  }

  .doc-chapter h3 {
    padding-left: 14px;
  }

  .doc-chapter .callout {
    padding-right: 20px;
    padding-left: 22px;
  }
}