.doc-hero {
  position: relative;
  overflow-x: clip;
  border-bottom: 1px solid var(--color-border);
  background:
    radial-gradient(ellipse at top left, var(--color-white-wash), var(--color-transparent)),
    radial-gradient(ellipse at bottom right, var(--color-accent-faint), var(--color-transparent)),
    repeating-linear-gradient(115deg, var(--color-line-faint) 0 1px, var(--color-transparent) 1px 10px);
}

.doc-hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.25fr) minmax(320px, .75fr);
  gap: 64px;
  align-items: center;
}

.doc-hero-copy {
  max-width: 760px;
}

.doc-hero-copy .hero-title {
  margin-top: 0;
  text-align: left;
}

.doc-hero-copy .lead {
  margin-bottom: 28px;
}

.doc-hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.access-sheet {
  position: relative;
  padding: 26px;
  overflow: hidden;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  background:
    repeating-linear-gradient(0deg, var(--color-line-faint) 0 1px, var(--color-transparent) 1px 34px),
    var(--color-panel);
  box-shadow: var(--shadow-card);
  transform: rotate(1deg);
}

.access-sheet::after {
  position: absolute;
  right: 22px;
  bottom: 20px;
  width: 38px;
  height: 28px;
  border-radius: var(--radius-xs);
  background:
    linear-gradient(90deg, var(--color-accent) 0 28%, var(--color-transparent) 28% 36%, var(--color-accent) 36% 64%, var(--color-transparent) 64% 72%, var(--color-accent) 72%);
  content: "";
  opacity: .72;
}

.access-sheet-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding-bottom: 18px;
  border-bottom: 1px solid var(--color-border);
  color: var(--color-text-muted);
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: .09em;
}

.access-sheet dl {
  margin: 0;
}

.access-sheet dl > div {
  display: grid;
  grid-template-columns: 92px minmax(0, 1fr);
  gap: 14px;
  padding: 15px 0;
  border-bottom: 1px solid var(--color-border);
}

.access-sheet dl > div:last-child {
  padding-bottom: 45px;
  border-bottom: 0;
}

.access-sheet dt {
  color: var(--color-text-muted);
  font-size: 13px;
}

.access-sheet dd {
  margin: 0;
  overflow-wrap: anywhere;
  color: var(--color-text);
  font-size: 13px;
  font-weight: 700;
}

.doc-intro {
  background: var(--color-panel);
}

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

.doc-intro a {
  color: var(--color-accent-dark);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.doc-toc-host {
  position: relative;
  z-index: 38;
  padding-top: 32px;
}

.doc-prose {
  padding-bottom: var(--section-space);
}

.doc-chapter {
  position: relative;
  padding-top: 72px;
  scroll-margin-top: var(--toc-offset);
}

.doc-chapter + .doc-chapter {
  margin-top: 28px;
  border-top: 1px solid var(--color-border);
}

.chapter-code {
  display: inline-flex;
  margin-bottom: 14px;
  color: var(--color-accent-dark);
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 750;
  letter-spacing: .08em;
}

.doc-prose h2 {
  margin-top: 0;
}

.doc-prose h3 {
  position: relative;
  padding-left: 18px;
}

.doc-prose h3::before {
  position: absolute;
  top: .45em;
  bottom: .35em;
  left: 0;
  width: 4px;
  border-radius: var(--radius-pill);
  background: var(--color-accent);
  content: "";
}

.doc-prose p {
  line-height: 1.92;
}

.doc-prose .table-scroll {
  margin: 34px 0;
}

.doc-prose pre {
  margin: 28px 0;
}

.scenario-matrix {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
  margin: 32px 0;
}

.scenario-matrix article {
  min-width: 0;
  padding: 22px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-panel);
  box-shadow: var(--shadow-soft);
}

.scenario-matrix h3 {
  margin-top: 0;
  margin-bottom: 8px;
  font-size: 19px;
}

.scenario-matrix p {
  font-size: 14px;
}

.verification-list {
  margin: 34px 0;
  padding: 26px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background:
    repeating-linear-gradient(115deg, var(--color-line-faint) 0 1px, var(--color-transparent) 1px 9px),
    var(--color-panel);
}

.verification-list h3 {
  margin-top: 0;
}

.verification-list ul {
  display: grid;
  gap: 10px;
  padding-left: 1.3em;
}

.verification-list li::marker {
  color: var(--color-accent);
}

@media (max-width: 900px) {
  .doc-hero-grid {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  .access-sheet {
    width: 100%;
    max-width: 620px;
    transform: none;
  }
}

@media (max-width: 768px) {
  .doc-toc-host {
    padding-top: 20px;
  }

  .doc-chapter {
    padding-top: 56px;
  }

  .scenario-matrix {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 640px) {
  .doc-hero-actions {
    align-items: stretch;
    flex-direction: column;
  }

  .doc-hero-actions .btn {
    width: 100%;
  }

  .access-sheet {
    padding: 20px;
  }

  .access-sheet dl > div {
    grid-template-columns: 1fr;
    gap: 4px;
  }

  .doc-intro p {
    font-size: 16px;
  }

  .doc-chapter {
    padding-top: 48px;
  }

  .verification-list {
    padding: 21px;
  }
}