.page-deepdoc {
  background:
    radial-gradient(circle at top right, var(--color-accent-glow), transparent 34%),
    linear-gradient(180deg, var(--color-bg-top), var(--color-bg) 48%, var(--color-bg-bottom));
}

.manual-hero {
  position: relative;
  max-width: 100%;
  overflow-x: clip;
  padding-top: 72px;
  padding-bottom: 76px;
  border-bottom: 1px solid var(--color-border);
}

.manual-hero::after {
  content: "";
  position: absolute;
  right: 5%;
  bottom: 6%;
  width: 180px;
  max-width: 24vw;
  aspect-ratio: 1;
  opacity: .36;
  background-image: radial-gradient(circle, var(--color-coral) 0 2px, transparent 3px);
  background-size: 18px 18px;
  mask-image: linear-gradient(135deg, transparent, var(--color-text));
  -webkit-mask-image: linear-gradient(135deg, transparent, var(--color-text));
  pointer-events: none;
}

.manual-hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(360px, .95fr);
  gap: 68px;
  align-items: center;
}

.manual-hero-copy {
  position: relative;
  z-index: 2;
}

.manual-hero-copy h1 {
  max-width: 760px;
  margin-bottom: 22px;
}

.manual-hero-lede {
  max-width: 650px;
  margin-bottom: 26px;
  font-size: 18px;
  line-height: 1.8;
}

.manual-hero-actions {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 16px 24px;
}

.manual-facts {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  margin-top: 38px;
  padding: 0;
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
  list-style: none;
}

.manual-facts li {
  display: grid;
  gap: 2px;
  padding: 18px 14px;
  border-left: 1px solid var(--color-border);
}

.manual-facts li:first-child {
  border-left: 0;
}

.manual-facts strong {
  font-family: var(--font-mono);
  font-size: 14px;
}

.manual-facts span {
  color: var(--color-muted);
  font-size: 12px;
}

.manual-route-stack {
  position: relative;
  min-height: 430px;
}

.manual-stack-glow {
  position: absolute;
  inset: 14% 3% 4% 10%;
  border-radius: 50%;
  background: radial-gradient(circle, var(--color-coral-glow), var(--color-accent-soft) 44%, transparent 72%);
  filter: blur(18px);
}

.manual-stack-sheet {
  position: absolute;
  display: flex;
  width: min(340px, 76%);
  min-height: 190px;
  flex-direction: column;
  justify-content: flex-end;
  padding: 28px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-glass);
  box-shadow: inset 0 1px 0 var(--color-highlight), var(--shadow-raised);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
}

.manual-stack-sheet::before {
  content: "";
  position: absolute;
  inset: 0 0 auto;
  height: 5px;
  border-radius: var(--radius-md) var(--radius-md) 0 0;
  background: linear-gradient(90deg, var(--color-accent), var(--color-coral));
}

.manual-stack-sheet span {
  margin-bottom: 8px;
  color: var(--color-muted);
  font-size: 11px;
  letter-spacing: .12em;
}

.manual-stack-sheet strong {
  font-family: var(--font-display);
  font-size: 26px;
}

.manual-stack-sheet-back {
  top: 20px;
  right: 0;
  opacity: .62;
  transform: translateY(0) rotate(4deg);
}

.manual-stack-sheet-mid {
  top: 108px;
  right: 9%;
  opacity: .8;
  transform: rotate(-2deg);
}

.manual-stack-sheet-front {
  top: 198px;
  right: 18%;
  min-height: 210px;
  background: var(--color-glass-strong);
}

.manual-stack-path {
  display: flex;
  align-items: center;
  gap: 0;
  margin-top: 28px;
}

.manual-stack-path i {
  position: relative;
  display: block;
  width: 42px;
  height: 8px;
  border-radius: var(--radius-pill);
  background: linear-gradient(90deg, var(--color-accent), var(--color-coral));
}

.manual-stack-path i + i {
  margin-left: 12px;
}

.manual-stack-path i + i::before {
  content: "";
  position: absolute;
  top: 3px;
  right: 100%;
  width: 12px;
  height: 1px;
  background: var(--color-border);
}

.manual-intro {
  padding-top: 56px;
}

.manual-intro-panel {
  max-width: var(--reading-width);
  padding: 24px 26px;
  border-left: 4px solid var(--color-accent);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  background: var(--color-panel);
  box-shadow: inset 0 1px 0 var(--color-highlight), var(--shadow-panel);
}

.manual-intro-panel p {
  margin-bottom: 0;
  line-height: 1.85;
}

.manual-article {
  padding-top: 42px;
  padding-bottom: 40px;
}

.manual-article > .toc-tabs {
  max-width: var(--reading-width);
  margin-right: auto;
  margin-left: auto;
}

.manual-chapter {
  position: relative;
  width: 100%;
  max-width: var(--reading-width);
  margin-inline: auto;
  padding-top: 62px;
  padding-bottom: 62px;
  border-bottom: 1px solid var(--color-border);
}

.manual-chapter:first-of-type {
  padding-top: 28px;
}

.manual-chapter-index {
  margin-bottom: 14px;
  color: var(--color-accent);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: .12em;
}

.manual-chapter h2 {
  margin-bottom: 32px;
}

.manual-chapter h3 {
  margin-top: 38px;
  margin-bottom: 14px;
  font-size: 23px;
}

.manual-chapter p {
  line-height: 1.92;
}

.manual-chapter .table-scroll,
.manual-chapter pre {
  margin-top: 28px;
  margin-bottom: 30px;
}

.manual-chapter .callout {
  margin-top: 34px;
  margin-bottom: 34px;
}

.manual-chapter .compare-table {
  min-width: 720px;
}

.manual-chapter pre {
  white-space: pre;
}

.manual-article > .end-promo {
  max-width: var(--reading-width);
  margin-right: auto;
  margin-left: auto;
}

@media (max-width: 980px) {
  .manual-hero-grid {
    grid-template-columns: 1fr;
    gap: 44px;
  }

  .manual-route-stack {
    width: 100%;
    max-width: 560px;
    min-height: 390px;
  }

  .manual-stack-sheet {
    width: min(340px, 72%);
  }
}

@media (max-width: 768px) {
  .manual-hero {
    padding-top: 48px;
    padding-bottom: 56px;
  }

  .manual-hero-lede {
    font-size: 16px;
  }

  .manual-facts {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .manual-facts li:nth-child(odd) {
    border-left: 0;
  }

  .manual-facts li:nth-child(n + 3) {
    border-top: 1px solid var(--color-border);
  }

  .manual-route-stack {
    min-height: 330px;
  }

  .manual-stack-sheet {
    min-height: 155px;
    padding: 22px;
  }

  .manual-stack-sheet-back {
    top: 0;
  }

  .manual-stack-sheet-mid {
    top: 68px;
  }

  .manual-stack-sheet-front {
    top: 138px;
    min-height: 175px;
  }

  .manual-stack-sheet strong {
    font-size: 22px;
  }

  .manual-stack-path {
    margin-top: 20px;
  }

  .manual-intro {
    padding-top: 40px;
  }

  .manual-chapter {
    padding-top: 50px;
    padding-bottom: 50px;
  }

  .manual-chapter h3 {
    margin-top: 32px;
    font-size: 21px;
  }
}

@media (max-width: 640px) {
  .manual-hero::after {
    display: none;
  }

  .manual-hero-actions {
    align-items: stretch;
    flex-direction: column;
  }

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

  .manual-facts li {
    padding: 14px 10px;
  }

  .manual-route-stack {
    min-height: 270px;
  }

  .manual-stack-sheet {
    width: 78%;
    min-height: 130px;
    padding: 18px;
  }

  .manual-stack-sheet-back {
    right: 0;
  }

  .manual-stack-sheet-mid {
    top: 54px;
    right: 7%;
  }

  .manual-stack-sheet-front {
    top: 108px;
    right: 14%;
    min-height: 145px;
  }

  .manual-stack-sheet span {
    margin-bottom: 4px;
  }

  .manual-stack-sheet strong {
    font-size: 19px;
  }

  .manual-stack-path {
    margin-top: 14px;
  }

  .manual-stack-path i {
    width: 28px;
    height: 6px;
  }

  .manual-intro-panel {
    padding: 20px;
  }

  .manual-article {
    padding-top: 32px;
  }

  .manual-chapter {
    padding-top: 44px;
    padding-bottom: 44px;
  }

  .manual-chapter h2 {
    margin-bottom: 26px;
  }

  .manual-chapter p {
    line-height: 1.82;
  }
}

@media (prefers-reduced-motion: reduce) {
  .manual-stack-sheet {
    transform: none;
  }
}