.manual-hero {
  position: relative;
  overflow: hidden;
  border-bottom: var(--border-heavy) solid var(--color-border);
  background:
    linear-gradient(90deg, var(--color-clear), var(--color-grid)),
    var(--color-bg-deep);
}

.manual-hero::before {
  position: absolute;
  inset: 0;
  background:
    repeating-linear-gradient(
      90deg,
      var(--color-clear) 0,
      var(--color-clear) 74px,
      var(--color-grid) 74px,
      var(--color-grid) 75px
    );
  content: "";
  pointer-events: none;
}

.manual-hero-grid {
  position: relative;
  display: grid;
  min-height: 610px;
  grid-template-columns: minmax(0, 1.08fr) minmax(370px, 0.92fr);
  gap: clamp(34px, 6vw, 82px);
  align-items: center;
  padding-top: 70px;
  padding-bottom: 70px;
}

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

.manual-hero h1 {
  max-width: 760px;
  margin-bottom: 28px;
  font-size: clamp(62px, 8vw, 112px);
  line-height: 0.86;
  text-transform: uppercase;
}

.manual-hero h1 span {
  color: var(--color-accent);
  -webkit-text-stroke: var(--border-fine) var(--color-accent-dark);
}

.manual-lead {
  max-width: 660px;
  margin-bottom: 0;
  padding-left: 18px;
  border-left: 7px solid var(--color-accent);
  color: var(--color-text-muted);
  font-size: 17px;
}

.manual-links,
.manual-close-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 13px;
  margin-top: 28px;
}

.diagnostic-board {
  position: relative;
  border: var(--border-heavy) solid var(--color-border);
  background: var(--color-panel);
  box-shadow: var(--shadow-hard);
  transform: rotate(0.6deg);
}

.diagnostic-board::before,
.diagnostic-board::after {
  position: absolute;
  width: 17px;
  height: 17px;
  border: var(--border-heavy) solid var(--color-border);
  background: var(--color-bg-deep);
  content: "";
}

.diagnostic-board::before {
  top: 9px;
  right: 9px;
}

.diagnostic-board::after {
  right: 9px;
  bottom: 9px;
}

.diagnostic-board-head {
  display: flex;
  min-height: 65px;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  padding: 14px 48px 14px 18px;
  border-bottom: var(--border-heavy) solid var(--color-border);
  background: var(--color-panel-dark);
}

.diagnostic-board-head strong {
  font-family: var(--font-display);
  font-size: 18px;
  letter-spacing: 0.04em;
}

.diagnostic-board-head span {
  color: var(--color-accent);
  font-family: var(--font-mono);
  font-size: 9px;
}

.diagnostic-chain {
  margin: 0;
  padding: 16px 34px 28px 16px;
  list-style: none;
  counter-reset: none;
}

.diagnostic-chain li {
  position: relative;
  display: grid;
  min-height: 66px;
  grid-template-columns: 42px minmax(0, 1fr);
  align-content: center;
  column-gap: 12px;
  padding: 8px 12px;
  border-bottom: var(--border-fine) solid var(--color-border-soft);
}

.diagnostic-chain li:last-child {
  border-bottom: 0;
}

.diagnostic-chain li::after {
  position: absolute;
  bottom: -5px;
  left: 27px;
  width: 9px;
  height: 9px;
  background: var(--color-accent);
  content: "";
}

.diagnostic-chain li:last-child::after {
  display: none;
}

.diagnostic-chain li > span {
  display: grid;
  width: 38px;
  height: 38px;
  grid-row: 1 / 3;
  place-items: center;
  border: var(--border-heavy) solid var(--color-border);
  background: var(--color-bg-deep);
  color: var(--color-accent);
  font-family: var(--font-mono);
  font-size: 10px;
  font-weight: 800;
}

.diagnostic-chain strong {
  align-self: end;
  font-size: 14px;
}

.diagnostic-chain small {
  align-self: start;
  font-size: 11px;
}

.manual-intro {
  border-bottom: var(--border-heavy) solid var(--color-border);
  background: var(--color-panel-dark);
}

.manual-scope {
  box-shadow: var(--shadow-hard);
}

.manual-scope p:last-child {
  margin-bottom: 0;
}

.manual-scope a {
  color: var(--color-accent);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.manual-body {
  padding-top: 30px;
  padding-bottom: 110px;
}

.manual-toc {
  top: 12px;
  margin-bottom: 58px;
}

.manual-article {
  color: var(--color-text-muted);
}

.manual-chapter {
  position: relative;
  margin-bottom: 96px;
  padding-top: 28px;
  scroll-margin-top: calc(var(--header-height) + 32px);
  border-top: var(--border-heavy) solid var(--color-border);
}

.manual-chapter::before {
  position: absolute;
  top: -3px;
  right: 0;
  width: 110px;
  height: 3px;
  background: var(--color-accent);
  content: "";
}

.chapter-plate {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  margin-bottom: 22px;
  padding: 10px 13px;
  border: var(--border-heavy) solid var(--color-border);
  background: var(--color-panel-dark);
  box-shadow: var(--shadow-small);
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.09em;
}

.chapter-plate span {
  color: var(--color-accent);
}

.chapter-plate strong {
  color: var(--color-border);
  font-size: 10px;
}

.manual-article .manual-chapter h2 {
  margin-top: 0;
  margin-bottom: 26px;
  font-size: clamp(34px, 5vw, 54px);
}

.manual-article .manual-chapter h3 {
  margin-top: 44px;
  margin-bottom: 14px;
  padding-left: 15px;
  border-left: 6px solid var(--color-accent);
  font-size: clamp(22px, 3vw, 29px);
}

.manual-article p,
.manual-article li {
  line-height: 1.92;
}

.manual-article p {
  margin-bottom: 20px;
}

.manual-article pre,
.manual-article .table-wrap,
.manual-article .callout {
  margin-top: 30px;
  margin-bottom: 32px;
}

.manual-article .data-table td:first-child {
  color: var(--color-text);
  font-family: var(--font-mono);
  font-size: 12px;
}

.manual-close {
  padding: 34px;
  border: var(--border-heavy) solid var(--color-accent);
  background: var(--color-panel);
  box-shadow: 9px 9px 0 var(--color-accent-dark);
}

.manual-close h2 {
  margin-top: 0;
  margin-bottom: 15px;
  font-size: clamp(31px, 5vw, 46px);
}

.manual-close p {
  margin-bottom: 0;
}

@media (max-width: 900px) {
  .manual-hero-grid {
    min-height: 0;
    grid-template-columns: minmax(0, 1fr);
    padding-top: 54px;
    padding-bottom: 70px;
  }

  .manual-hero h1 {
    max-width: 680px;
  }

  .diagnostic-board {
    transform: none;
  }

  .manual-toc {
    top: 6px;
  }
}

@media (max-width: 640px) {
  .manual-hero-grid {
    gap: 44px;
    padding-top: 38px;
    padding-bottom: 52px;
  }

  .manual-hero h1 {
    font-size: clamp(49px, 16vw, 70px);
  }

  .manual-lead {
    font-size: 14px;
  }

  .diagnostic-board-head {
    align-items: flex-start;
    flex-direction: column;
    padding-right: 46px;
  }

  .diagnostic-chain {
    padding-right: 20px;
  }

  .manual-body {
    padding-top: 20px;
    padding-bottom: 76px;
  }

  .manual-toc {
    margin-bottom: 42px;
  }

  .manual-chapter {
    margin-bottom: 72px;
  }

  .chapter-plate {
    align-items: flex-start;
    flex-direction: column;
    gap: 5px;
  }

  .manual-article .manual-chapter h2 {
    font-size: clamp(31px, 10vw, 42px);
  }

  .manual-close {
    padding: 22px;
  }

  .manual-links,
  .manual-close-actions {
    display: grid;
    grid-template-columns: minmax(0, 1fr);
  }
}