:root {
  --deepdoc-hero-width: 980px;
  --deepdoc-table-width: 760px;
  --deepdoc-rule-width: 72px;
  --deepdoc-index-size: 42px;
  --deepdoc-section-gap: clamp(68px, 8vw, 104px);
}

.deepdoc-hero {
  position: relative;
  overflow-x: clip;
  padding-top: clamp(72px, 9vw, 116px);
  padding-bottom: clamp(48px, 7vw, 88px);
  border-bottom: 1px solid var(--color-border);
  background:
    radial-gradient(circle at 82% 18%, var(--color-sun), var(--color-transparent) 24%),
    radial-gradient(ellipse at 16% 82%, var(--color-cream), var(--color-transparent) 38%),
    linear-gradient(145deg, var(--color-bg), var(--color-panel));
}

.deepdoc-hero::before {
  position: absolute;
  inset: 0;
  content: "";
  background:
    repeating-linear-gradient(90deg, var(--color-transparent) 0, var(--color-transparent) 79px, var(--color-text-soft) 80px),
    repeating-linear-gradient(0deg, var(--color-transparent) 0, var(--color-transparent) 79px, var(--color-text-soft) 80px);
  opacity: 0.18;
  pointer-events: none;
}

.deepdoc-hero-inner {
  position: relative;
  width: 100%;
  max-width: calc(var(--deepdoc-hero-width) + (var(--gutter) * 2));
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.deepdoc-hero .eyebrow {
  margin-bottom: 22px;
}

.deepdoc-hero h1 {
  max-width: 920px;
}

.deepdoc-lead {
  max-width: 780px;
  margin-bottom: 0;
  color: var(--color-muted);
  font-size: clamp(17px, 2vw, 20px);
  line-height: 1.85;
}

.deepdoc-lead a {
  color: var(--color-accent-dark);
  text-decoration: underline;
  text-decoration-color: var(--color-accent-medium);
  text-underline-offset: 0.2em;
}

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

.deepdoc-facts .badge {
  background: var(--color-glass-strong);
}

.deepdoc-article {
  position: relative;
  padding-top: clamp(38px, 6vw, 72px);
  padding-bottom: var(--section-space);
}

.deepdoc-article .toc-tabs {
  margin-bottom: clamp(54px, 7vw, 86px);
}

.deepdoc-introduction {
  margin-bottom: var(--deepdoc-section-gap);
  padding: clamp(24px, 4vw, 38px);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  background:
    radial-gradient(circle at 92% 8%, var(--color-accent-soft), var(--color-transparent) 34%),
    var(--color-panel);
  box-shadow: var(--shadow-card);
}

.deepdoc-introduction p:last-child {
  margin-bottom: 0;
}

.deepdoc-section {
  position: relative;
  padding-bottom: var(--deepdoc-section-gap);
}

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

.deepdoc-section-heading {
  display: grid;
  grid-template-columns: var(--deepdoc-index-size) minmax(0, 1fr);
  align-items: start;
  gap: 18px;
  margin-bottom: 28px;
}

.deepdoc-section-index {
  display: grid;
  width: var(--deepdoc-index-size);
  height: var(--deepdoc-index-size);
  place-items: center;
  border: 1px solid var(--color-accent-medium);
  border-radius: var(--radius-md);
  color: var(--color-accent-dark);
  background: var(--color-selected);
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 720;
  box-shadow: var(--shadow-card);
}

.deepdoc-section-heading h2 {
  margin-bottom: 0;
}

.deepdoc-section h3 {
  margin-top: 2em;
}

.deepdoc-section h3::after {
  display: block;
  width: var(--deepdoc-rule-width);
  margin-top: 12px;
  border-bottom: 3px solid var(--color-accent-medium);
  content: "";
}

.deepdoc-section p {
  text-align: justify;
  text-justify: inter-ideograph;
}

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

.deepdoc-table {
  margin: 34px 0;
}

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

.deepdoc-table td:first-child {
  color: var(--color-text);
  font-weight: 680;
}

.deepdoc-table td {
  color: var(--color-muted);
  line-height: 1.72;
}

.deepdoc-checklist {
  display: grid;
  gap: 12px;
  margin: 28px 0;
  padding: 0;
  list-style: none;
}

.deepdoc-checklist li {
  position: relative;
  padding: 17px 18px 17px 48px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-panel);
  box-shadow: var(--shadow-card);
}

.deepdoc-checklist li::before {
  position: absolute;
  top: 21px;
  left: 20px;
  width: 12px;
  height: 12px;
  border: 3px solid var(--color-panel);
  border-radius: 50%;
  content: "";
  background: var(--color-success);
  box-shadow: 0 0 0 3px var(--color-success-soft);
}

.deepdoc-code-note {
  margin-top: -14px;
  color: var(--color-muted);
  font-size: 13px;
}

.deepdoc-next {
  padding: clamp(26px, 5vw, 44px);
  border: 1px solid var(--color-accent-medium);
  border-radius: var(--radius-xl);
  background:
    radial-gradient(circle at 88% 12%, var(--color-apricot), var(--color-transparent) 38%),
    var(--color-selected);
  box-shadow: var(--shadow-card-high);
}

.deepdoc-next h2 {
  font-size: clamp(28px, 4vw, 40px);
}

.deepdoc-next p {
  max-width: 680px;
  color: var(--color-muted);
}

.deepdoc-links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 24px;
}

@media (max-width: 760px) {
  .deepdoc-hero {
    padding-top: 58px;
  }

  .deepdoc-section-heading {
    grid-template-columns: 1fr;
    gap: 13px;
  }

  .deepdoc-section p {
    text-align: left;
  }

  .deepdoc-links {
    align-items: stretch;
    flex-direction: column;
  }

  .deepdoc-links .button {
    width: 100%;
  }
}

@media (max-width: 640px) {
  .deepdoc-introduction {
    padding: 22px;
  }

  .deepdoc-table .data-table {
    min-width: 680px;
  }

  .deepdoc-checklist li {
    padding-right: 16px;
  }
}