:root {
  --deepdoc-copy-width: 860px;
  --deepdoc-aside-width: 330px;
  --deepdoc-rule-width: 4px;
}

.deepdoc-hero {
  position: relative;
  overflow-x: clip;
  padding-top: clamp(64px, 9vw, 108px);
  padding-bottom: clamp(58px, 8vw, 96px);
  border-bottom: 1px solid var(--color-border);
  background-image:
    radial-gradient(circle at top right, var(--color-accent-glow-soft), transparent 42%),
    radial-gradient(var(--color-line-soft) 1px, transparent 1.1px);
  background-size: auto, 24px 24px;
}

.deepdoc-hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(260px, var(--deepdoc-aside-width));
  gap: clamp(36px, 7vw, 84px);
  align-items: end;
}

.deepdoc-intro {
  min-width: 0;
}

.deepdoc-intro h1 {
  max-width: 780px;
  margin-top: 18px;
}

.deepdoc-lead {
  max-width: 760px;
  margin-top: 22px;
  color: var(--color-text-muted);
  font-size: clamp(17px, 2vw, 21px);
  line-height: 1.75;
}

.deepdoc-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 28px;
}

.deepdoc-scope {
  min-width: 0;
  padding: 28px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-panel);
  background: var(--color-panel-raised);
  box-shadow: 0 26px 58px var(--color-shadow-deep);
}

.deepdoc-scope-label {
  color: var(--color-accent);
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 800;
  letter-spacing: .16em;
}

.deepdoc-scope p {
  margin-top: 18px;
  color: var(--color-text);
  font-family: var(--font-display);
  font-size: 18px;
  font-weight: 750;
  line-height: 1.65;
}

.deepdoc-article {
  padding-top: clamp(56px, 8vw, 92px);
  padding-bottom: var(--section-space);
}

.deepdoc-preface {
  max-width: var(--deepdoc-copy-width);
  margin-right: auto;
  margin-bottom: 36px;
}

.deepdoc-preface p {
  color: var(--color-text-muted);
  font-size: 18px;
}

.deepdoc-preface p + p {
  margin-top: 18px;
}

.deepdoc-preface a,
.deepdoc-content a {
  color: var(--color-accent);
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 4px;
}

.deepdoc-article > .toc-tabs {
  margin-bottom: 52px;
}

.deepdoc-content {
  max-width: var(--deepdoc-copy-width);
  margin-right: auto;
}

.deepdoc-section {
  padding-top: 36px;
  padding-bottom: 76px;
  border-bottom: 1px solid var(--color-border);
}

.deepdoc-section:first-child {
  padding-top: 0;
}

.deepdoc-section:last-child {
  padding-bottom: 0;
  border-bottom: 0;
}

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

.deepdoc-section h3 {
  margin-top: 38px;
  margin-bottom: 14px;
  font-size: clamp(21px, 2.3vw, 27px);
}

.deepdoc-section p {
  color: var(--color-text-muted);
  font-size: 17px;
  line-height: 1.9;
}

.deepdoc-section p + p {
  margin-top: 18px;
}

.deepdoc-section .callout,
.deepdoc-section .table-scroll,
.deepdoc-section pre,
.deepdoc-checklist {
  margin-top: 30px;
  margin-bottom: 30px;
}

.deepdoc-section .callout {
  border-left-width: var(--deepdoc-rule-width);
  line-height: 1.8;
}

.deepdoc-section .table-scroll {
  box-shadow: 0 18px 40px var(--color-shadow);
}

.deepdoc-section table {
  line-height: 1.65;
}

.deepdoc-section td {
  min-width: 150px;
}

.deepdoc-section pre {
  white-space: pre-wrap;
  overflow-wrap: anywhere;
  color: var(--color-text-muted);
  line-height: 1.75;
}

.deepdoc-checklist {
  padding: clamp(22px, 4vw, 34px);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-panel);
  background: var(--color-panel-raised);
  box-shadow: 0 18px 40px var(--color-shadow);
}

.deepdoc-checklist h3 {
  margin-top: 0;
}

.deepdoc-checklist ul {
  display: grid;
  gap: 12px;
  margin-top: 18px;
  padding: 0;
  list-style: none;
}

.deepdoc-checklist li {
  position: relative;
  padding-left: 28px;
  color: var(--color-text-muted);
}

.deepdoc-checklist li::before {
  position: absolute;
  top: 0;
  left: 0;
  color: var(--color-success);
  content: "✓";
  font-weight: 800;
}

@media (max-width: 960px) {
  .deepdoc-hero-grid {
    grid-template-columns: 1fr;
  }

  .deepdoc-scope {
    max-width: 720px;
  }
}

@media (max-width: 768px) {
  .deepdoc-hero {
    padding-top: 48px;
    padding-bottom: 58px;
  }

  .deepdoc-lead,
  .deepdoc-preface p,
  .deepdoc-section p {
    font-size: 16px;
  }

  .deepdoc-article > .toc-tabs {
    margin-bottom: 38px;
  }

  .deepdoc-section {
    padding-top: 26px;
    padding-bottom: 58px;
  }

  .deepdoc-section h2 {
    margin-bottom: 24px;
  }

  .deepdoc-section h3 {
    margin-top: 32px;
  }
}

@media (max-width: 640px) {
  .deepdoc-actions,
  .deepdoc-actions .btn {
    width: 100%;
  }

  .deepdoc-scope {
    padding: 22px;
  }

  .deepdoc-article {
    padding-top: 44px;
  }

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