:root {
  --deepdoc-number-size: 54px;
  --deepdoc-chapter-gap: clamp(42px, 7vw, 76px);
  --deepdoc-code-shadow: rgba(22, 24, 29, 0.14);
}

.doc-intro {
  position: relative;
  padding-top: clamp(74px, 10vw, 124px);
  padding-bottom: clamp(66px, 9vw, 108px);
  overflow-x: clip;
  background:
    radial-gradient(circle at 18% 24%, var(--color-green-low), var(--color-transparent) 28%),
    radial-gradient(circle at 82% 20%, var(--color-blue-low), var(--color-transparent) 30%),
    linear-gradient(180deg, var(--color-page), var(--color-panel));
}

.doc-intro::after {
  content: "";
  position: absolute;
  right: -84px;
  bottom: -94px;
  width: 260px;
  height: 260px;
  border-radius: var(--radius-feature);
  background: linear-gradient(145deg, var(--color-orange-low), var(--color-pink-low));
  transform: rotate(14deg);
  pointer-events: none;
}

.doc-intro .reading-wrap {
  position: relative;
  z-index: 1;
}

.doc-intro h1 {
  max-width: 720px;
  margin-bottom: 20px;
}

.doc-lead {
  max-width: 720px;
  margin-bottom: 26px;
  color: var(--color-ink-muted);
  font-size: clamp(17px, 2vw, 21px);
  line-height: 1.75;
}

.doc-facts {
  margin-top: 26px;
}

.doc-relationship {
  max-width: 720px;
  margin-top: 26px;
  margin-bottom: 0;
  padding-top: 22px;
  border-top: 1px solid var(--color-line);
  color: var(--color-ink-muted);
}

.doc-manual {
  padding-top: 34px;
  padding-bottom: var(--section-space);
}

.doc-manual > .toc {
  margin-bottom: clamp(46px, 7vw, 76px);
}

.doc-chapter {
  width: 100%;
  max-width: 940px;
  margin-inline: auto;
  margin-bottom: var(--deepdoc-chapter-gap);
  padding: clamp(28px, 5vw, 58px);
  scroll-margin-top: 82px;
  border-radius: var(--radius-feature);
  background: var(--color-page);
  color: var(--color-ink);
  box-shadow: var(--shadow-card);
}

.doc-chapter:nth-of-type(even) {
  background: var(--color-panel);
}

.chapter-heading {
  display: grid;
  grid-template-columns: var(--deepdoc-number-size) minmax(0, 1fr);
  margin-bottom: clamp(28px, 5vw, 46px);
  align-items: start;
  gap: 20px;
}

.chapter-heading h2 {
  margin-bottom: 0;
}

.chapter-index {
  display: grid;
  width: var(--deepdoc-number-size);
  height: var(--deepdoc-number-size);
  flex-shrink: 0;
  place-items: center;
  border-radius: var(--radius-medium);
  background: var(--color-brand);
  color: var(--color-white);
  box-shadow: var(--shadow-button);
  font-family: var(--font-mono);
  font-size: 14px;
  font-weight: 750;
}

.doc-chapter:nth-of-type(3n) .chapter-index {
  background: var(--color-positive);
}

.doc-chapter:nth-of-type(3n + 1) .chapter-index {
  background: var(--color-caution);
  color: var(--color-highlight-ink);
}

.doc-chapter .prose {
  max-width: var(--reading-width);
  margin-inline: auto;
}

.doc-chapter .prose h3 {
  margin-top: 1.9em;
}

.doc-chapter .prose h3:first-child {
  margin-top: 0;
}

.doc-chapter pre {
  margin-top: 28px;
  margin-bottom: 30px;
  box-shadow: 0 20px 42px var(--deepdoc-code-shadow);
}

.table-scroll {
  max-width: 100%;
  margin-top: 30px;
  margin-bottom: 32px;
  overflow-x: auto;
  border-radius: var(--radius-medium);
  box-shadow: var(--shadow-float);
  -webkit-overflow-scrolling: touch;
}

.table-scroll table {
  min-width: 680px;
  margin-bottom: 0;
  box-shadow: none;
}

.table-scroll:focus-visible {
  outline: 3px solid var(--color-brand-glow);
  outline-offset: 4px;
}

.doc-chapter .download-note-card {
  max-width: 100%;
}

@media (max-width: 768px) {
  .doc-intro {
    padding-top: 68px;
    padding-bottom: 72px;
  }

  .doc-intro::after {
    right: -110px;
    width: 220px;
    height: 220px;
  }

  .doc-lead {
    font-size: 17px;
  }

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

  .doc-chapter {
    margin-bottom: 38px;
    padding: 26px 22px;
    border-radius: var(--radius-large);
  }

  .chapter-heading {
    grid-template-columns: 46px minmax(0, 1fr);
    gap: 14px;
  }

  .chapter-index {
    width: 46px;
    height: 46px;
    border-radius: var(--radius-small);
  }
}

@media (max-width: 480px) {
  .chapter-heading {
    grid-template-columns: 1fr;
  }

  .chapter-index {
    width: 44px;
    height: 36px;
    border-radius: var(--radius-pill);
  }

  .doc-chapter {
    padding: 24px 18px;
  }

  .doc-facts {
    justify-content: flex-start;
  }

  .table-scroll table {
    min-width: 620px;
  }
}