.deepdoc-hero {
  position: relative;
  overflow-x: clip;
  background: var(--color-mist);
}

.deepdoc-hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) minmax(320px, .8fr);
  align-items: center;
  gap: clamp(32px, 6vw, 84px);
}

.deepdoc-hero-copy h1 {
  max-width: 720px;
  margin-top: 18px;
  font-size: clamp(36px, 4vw, 48px);
}

.deepdoc-lead {
  max-width: 760px;
  color: var(--color-ink);
  font-size: clamp(18px, 2vw, 22px);
  line-height: 1.75;
}

.deepdoc-hero-copy > p:not(.deepdoc-lead) {
  max-width: 760px;
  color: var(--color-muted);
}

.deepdoc-hero-copy .fact-row {
  margin-top: 28px;
}

.deepdoc-map {
  position: relative;
  overflow: hidden;
}

.deepdoc-map::before {
  position: absolute;
  top: 0;
  bottom: 0;
  left: 34px;
  width: 2px;
  background: var(--color-line);
  content: "";
}

.deepdoc-map-label,
.chapter-kicker {
  color: var(--color-brand-deep);
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: .12em;
}

.flow-list {
  position: relative;
  display: grid;
  gap: 18px;
  margin: 22px 0 0;
  padding: 0;
  list-style: none;
}

.flow-list li {
  display: grid;
  min-height: 58px;
  grid-template-columns: 70px 1fr;
  align-items: center;
  gap: 14px;
}

.flow-list code {
  position: relative;
  z-index: 2;
  display: inline-flex;
  min-height: 34px;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-pill);
  background: var(--color-brand);
  color: var(--color-surface);
  font-size: 12px;
}

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

.deepdoc-toc-wrap {
  position: relative;
  z-index: 8;
  margin-top: -24px;
}

.deepdoc-toc-wrap .toc-nav {
  top: 10px;
}

.deepdoc-article {
  padding-top: clamp(56px, 8vw, 96px);
  padding-bottom: var(--section-space);
}

.deepdoc-chapter {
  scroll-margin-top: 92px;
}

.deepdoc-chapter + .deepdoc-chapter {
  margin-top: clamp(76px, 10vw, 124px);
  padding-top: clamp(56px, 7vw, 84px);
  border-top: 1px solid var(--color-line);
}

.deepdoc-chapter h2 {
  margin-top: 10px;
}

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

.deepdoc-chapter h3::before {
  position: absolute;
  top: .35em;
  bottom: .35em;
  left: 0;
  width: 4px;
  border-radius: var(--radius-pill);
  background: var(--color-brand);
  content: "";
}

.deepdoc-chapter p {
  color: var(--color-ink);
}

.deepdoc-chapter .table-wrap {
  margin: 30px 0;
  box-shadow: var(--shadow-card);
}

.deepdoc-chapter pre {
  margin: 30px 0;
}

.deepdoc-chapter .callout {
  margin-top: 32px;
  margin-bottom: 32px;
}

.deepdoc-chapter .data-table td:first-child {
  color: var(--color-ink);
  font-weight: 700;
}

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

  .deepdoc-map {
    max-width: 620px;
  }

  .deepdoc-toc-wrap {
    margin-top: 0;
    padding-top: 18px;
  }
}

@media (max-width: 768px) {
  .deepdoc-hero-copy h1 {
    font-size: clamp(26px, 7.5vw, 30px);
  }

  .deepdoc-lead {
    font-size: 18px;
  }

  .deepdoc-article {
    padding-top: 52px;
  }

  .deepdoc-chapter + .deepdoc-chapter {
    margin-top: 68px;
    padding-top: 52px;
  }
}

@media (max-width: 480px) {
  .flow-list li {
    grid-template-columns: 62px 1fr;
    gap: 10px;
  }

  .deepdoc-map::before {
    left: 31px;
  }

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