:root {
  --deepdoc-rule-width: 48px;
  --deepdoc-table-min: 760px;
  --deepdoc-code-size: .72rem;
}

.deepdoc-hero {
  padding-top: clamp(42px, 7vw, 84px);
  padding-bottom: clamp(38px, 6vw, 72px);
  border-bottom: 1px solid var(--color-border);
}

.deepdoc-breadcrumb {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: clamp(34px, 6vw, 64px);
  color: var(--color-text-muted);
  font-family: var(--font-mono);
  font-size: .72rem;
}

.deepdoc-breadcrumb a:hover {
  color: var(--color-text);
}

.deepdoc-heading {
  position: relative;
  max-width: var(--reading-width);
}

.deepdoc-heading::before {
  position: absolute;
  top: 0;
  bottom: 0;
  left: calc(var(--deepdoc-rule-width) * -1);
  border-left: 1px solid var(--color-line);
  content: "";
}

.deepdoc-heading::after {
  position: absolute;
  top: 0;
  left: calc((var(--deepdoc-rule-width) * -1) - 3px);
  width: 7px;
  height: 7px;
  border-radius: var(--radius-pill);
  background: var(--color-accent);
  content: "";
}

.deepdoc-heading .badge {
  margin-bottom: 22px;
}

.deepdoc-heading .eyebrow {
  margin-bottom: 16px;
}

.deepdoc-heading h1 {
  margin-bottom: 26px;
}

.deepdoc-heading .lead {
  max-width: var(--reading-width);
}

.deepdoc-heading .chip-row {
  display: flex;
  flex-wrap: wrap;
  gap: 9px;
  margin-top: 28px;
}

.deepdoc-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 24px;
  margin-top: 24px;
  color: var(--color-text-muted);
  font-family: var(--font-mono);
  font-size: .72rem;
}

.deepdoc-flow {
  padding-top: 28px;
  padding-bottom: var(--section-space);
}

.deepdoc-flow > .toc-tabs {
  margin-bottom: clamp(46px, 7vw, 76px);
}

.deepdoc-article {
  width: 100%;
  max-width: var(--reading-width);
  margin-inline: auto;
}

.deepdoc-article a:not(.btn) {
  color: var(--color-accent-strong);
  text-decoration: underline;
  text-decoration-color: var(--color-line);
  text-underline-offset: 3px;
}

.deepdoc-article a:not(.btn):hover {
  text-decoration-color: var(--color-accent);
}

.deepdoc-intro {
  padding: clamp(24px, 4vw, 38px);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  background: var(--color-panel);
}

.deepdoc-intro > p {
  color: var(--color-text-muted);
  font-size: 1.02rem;
}

.deepdoc-intro > p:last-of-type {
  margin-bottom: 26px;
}

.deepdoc-section {
  padding-top: clamp(72px, 10vw, 112px);
  scroll-margin-top: var(--toc-offset);
}

.deepdoc-section + .deepdoc-section {
  border-top: 1px solid var(--color-border);
}

.chapter-code {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 18px;
  color: var(--color-accent-strong);
  font-family: var(--font-mono);
  font-size: var(--deepdoc-code-size);
  letter-spacing: .12em;
}

.chapter-code::after {
  width: var(--deepdoc-rule-width);
  border-top: 1px solid var(--color-accent);
  content: "";
}

.deepdoc-section h2 {
  margin-bottom: 38px;
}

.deepdoc-section h3 {
  position: relative;
  margin-top: 42px;
  padding-top: 17px;
  border-top: 1px dashed var(--color-line);
  font-size: clamp(21px, 2.2vw, 27px);
}

.deepdoc-section h3::before {
  position: absolute;
  top: -4px;
  left: 0;
  width: 7px;
  height: 7px;
  border-radius: var(--radius-pill);
  background: var(--color-text-muted);
  content: "";
}

.deepdoc-section p,
.deepdoc-intro p {
  overflow-wrap: break-word;
}

.deepdoc-section p {
  color: var(--color-text-muted);
  line-height: 1.88;
}

.deepdoc-section .callout,
.deepdoc-intro .callout {
  margin-top: 30px;
  margin-bottom: 30px;
}

.deepdoc-section .callout p,
.deepdoc-intro .callout p {
  margin-bottom: 0;
}

.deepdoc-section .table-scroll {
  margin-top: 32px;
  margin-bottom: 34px;
}

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

.deepdoc-section pre {
  position: relative;
  margin-top: 30px;
  margin-bottom: 30px;
  padding-top: 42px;
  box-shadow: var(--shadow-window);
}

.deepdoc-section pre::before {
  position: absolute;
  top: 15px;
  left: 18px;
  width: 7px;
  height: 7px;
  border-radius: var(--radius-pill);
  background: var(--color-accent);
  box-shadow: 14px 0 0 var(--color-warning), 28px 0 0 var(--color-success);
  content: "";
}

.deepdoc-section pre::after {
  position: absolute;
  top: 11px;
  right: 18px;
  color: var(--color-line);
  content: "terminal";
  font-family: var(--font-mono);
  font-size: .66rem;
  letter-spacing: .08em;
}

.deepdoc-close {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: center;
  gap: 28px;
  margin-top: clamp(72px, 10vw, 112px);
  padding: clamp(28px, 5vw, 46px);
  border: 1px solid var(--color-accent);
  border-radius: var(--radius-md);
  background: var(--color-accent-soft);
}

.deepdoc-close h2 {
  margin-bottom: 10px;
  font-size: clamp(28px, 4vw, 40px);
}

.deepdoc-close p:last-child {
  margin-bottom: 0;
  color: var(--color-text-muted);
}

@media (max-width: 900px) {
  .deepdoc-heading::before,
  .deepdoc-heading::after {
    display: none;
  }

  .deepdoc-flow > .toc-tabs {
    top: 8px;
  }
}

@media (max-width: 768px) {
  .deepdoc-hero {
    padding-top: 32px;
  }

  .deepdoc-breadcrumb {
    margin-bottom: 36px;
  }

  .deepdoc-heading .chip-row {
    align-items: flex-start;
    flex-direction: column;
  }

  .deepdoc-section {
    padding-top: 72px;
  }

  .deepdoc-section h2 {
    margin-bottom: 30px;
  }

  .deepdoc-section h3 {
    margin-top: 36px;
  }

  .deepdoc-close {
    grid-template-columns: 1fr;
  }

  .deepdoc-close .btn {
    width: 100%;
  }
}

@media (max-width: 640px) {
  .deepdoc-flow {
    padding-top: 18px;
  }

  .deepdoc-flow > .toc-tabs {
    margin-right: calc(var(--gutter) * -1);
    margin-left: calc(var(--gutter) * -1);
    padding-right: var(--gutter);
    padding-left: var(--gutter);
    border-right: 0;
    border-left: 0;
    border-radius: var(--radius-xs);
  }

  .deepdoc-intro {
    padding: 22px 18px;
  }

  .deepdoc-section .callout,
  .deepdoc-intro .callout {
    padding-right: 18px;
  }

  .deepdoc-section pre {
    padding-right: 15px;
    padding-left: 15px;
    font-size: .78rem;
  }
}