.manual-hero {
  padding-top: clamp(54px, 7vw, 94px);
  padding-bottom: clamp(54px, 7vw, 92px);
  position: relative;
  overflow-x: clip;
  border-bottom: 1px solid var(--color-border-soft);
}

.manual-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(var(--color-border-soft) 1px, transparent 1px),
    linear-gradient(90deg, var(--color-border-soft) 1px, transparent 1px);
  background-size: 56px 56px;
  opacity: 0.12;
}

.manual-hero-grid {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: minmax(0, 0.92fr) minmax(460px, 1.08fr);
  align-items: center;
  gap: clamp(40px, 7vw, 92px);
}

.manual-hero-copy {
  min-width: 0;
}

.manual-hero-copy h1 {
  max-width: 680px;
  margin-bottom: 20px;
  font-size: clamp(52px, 5vw, 68px);
}

.manual-hero-lead {
  max-width: 670px;
  margin-bottom: 24px;
  color: var(--color-text-muted);
  font-size: clamp(18px, 2vw, 21px);
  line-height: 1.7;
}

.manual-hero-links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.manual-facts {
  margin-top: 24px;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0;
  color: var(--color-text-faint);
  font-family: var(--font-mono);
  font-size: 10px;
}

.manual-facts span {
  padding: 2px 12px;
  border-right: 1px solid var(--color-border-soft);
}

.manual-facts span:first-child {
  padding-left: 0;
}

.manual-facts span:last-child {
  border-right: 0;
}

.signal-record {
  min-width: 0;
  overflow: hidden;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  background: var(--color-panel);
  box-shadow: var(--shadow-panel);
}

.record-chrome {
  min-height: 42px;
  padding: 0 16px;
  display: flex;
  align-items: center;
  gap: 6px;
  border-bottom: 1px solid var(--color-border-soft);
  background: var(--color-panel-deep);
}

.record-light {
  width: 7px;
  height: 7px;
  flex: 0 0 auto;
  border-radius: var(--radius-pill);
  background: var(--color-border);
}

.record-light.is-active {
  background: var(--color-accent);
}

.record-title {
  margin-left: 9px;
  color: var(--color-text-faint);
  font-family: var(--font-mono);
  font-size: 9px;
  letter-spacing: 0.11em;
}

.record-body {
  padding: 18px;
}

.record-wave {
  width: 100%;
  height: auto;
  border: 1px solid var(--color-border-soft);
  border-radius: var(--radius-sm);
  background: var(--color-panel-deep);
}

.record-grid-line {
  stroke: var(--color-border-soft);
  stroke-width: 1;
  fill: none;
}

.record-base-line {
  stroke: var(--color-border);
  stroke-width: 1;
  stroke-dasharray: 3 8;
  fill: none;
}

.record-signal-shadow {
  stroke: var(--color-accent-dark);
  stroke-width: 12;
  stroke-linecap: round;
  fill: none;
  opacity: 0.12;
}

.record-signal-line {
  stroke: var(--color-accent);
  stroke-width: 2;
  stroke-linecap: round;
  fill: none;
}

.record-node-ring {
  fill: var(--color-panel-deep);
  stroke: var(--color-accent-dark);
  stroke-width: 1;
}

.record-node {
  fill: var(--color-accent);
}

.record-labels {
  margin-top: 10px;
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  color: var(--color-text-faint);
  font-family: var(--font-mono);
  font-size: 8px;
  letter-spacing: 0.06em;
  text-align: center;
}

.record-status {
  margin-top: 18px;
  display: flex;
  flex-wrap: wrap;
  gap: 9px;
}

.record-status span {
  min-height: 28px;
  padding: 4px 10px;
  display: inline-flex;
  align-items: center;
  gap: 7px;
  border: 1px solid var(--color-border-soft);
  border-radius: var(--radius-pill);
  color: var(--color-text-muted);
  font-family: var(--font-mono);
  font-size: 9px;
}

.record-status i {
  width: 6px;
  height: 6px;
  flex: 0 0 auto;
  border-radius: var(--radius-pill);
  background: var(--color-success);
}

.manual-scope {
  max-width: var(--content-width);
  margin: clamp(38px, 5vw, 64px) 0 0;
  padding: 18px 20px;
  position: relative;
  z-index: 1;
  border-left: 3px solid var(--color-accent);
  background: var(--color-panel);
  color: var(--color-text-muted);
}

.manual-scope a,
.manual-document a {
  color: var(--color-success);
  text-decoration: underline;
  text-underline-offset: 0.2em;
}

.manual-layout {
  padding-top: clamp(54px, 7vw, 90px);
  padding-bottom: var(--section-space);
  display: grid;
  grid-template-columns: 210px minmax(0, 1fr);
  align-items: start;
  gap: clamp(40px, 6vw, 84px);
}

.manual-index {
  position: sticky;
  top: calc(var(--header-height) + 22px);
}

.manual-index-label {
  display: block;
  margin-bottom: 18px;
  color: var(--color-accent);
  font-family: var(--font-mono);
  font-size: 9px;
  letter-spacing: 0.12em;
}

.manual-index ol {
  margin: 0;
  padding: 0 0 0 18px;
  display: grid;
  gap: 5px;
  border-left: 1px solid var(--color-border);
  list-style: none;
  counter-reset: manual-index;
}

.manual-index li {
  min-width: 0;
  counter-increment: manual-index;
}

.manual-index a {
  min-height: 38px;
  padding: 8px 8px 8px 0;
  display: flex;
  align-items: center;
  gap: 9px;
  color: var(--color-text-muted);
  font-size: 12px;
  transition: color var(--transition-fast);
}

.manual-index a::before {
  content: counter(manual-index);
  min-width: 18px;
  color: var(--color-text-faint);
  font-family: var(--font-mono);
  font-size: 9px;
}

.manual-index a:hover {
  color: var(--color-text);
}

.manual-document {
  width: min(100%, 920px);
  min-width: 0;
}

.manual-document .toc-tabs {
  display: none;
}

.manual-chapter {
  padding-bottom: clamp(74px, 9vw, 118px);
  color: var(--color-text-muted);
}

.manual-chapter:last-child {
  padding-bottom: 0;
}

.manual-chapter h2 {
  max-width: 800px;
  margin-bottom: 42px;
}

.manual-chapter h3 {
  margin-top: 40px;
  margin-bottom: 14px;
  color: var(--color-text);
  font-size: clamp(22px, 2.4vw, 28px);
}

.manual-chapter p {
  max-width: 850px;
  margin-bottom: 18px;
  font-size: 17px;
  line-height: 1.88;
}

.manual-chapter .callout,
.manual-chapter .verdict {
  max-width: 850px;
  margin-top: 30px;
  margin-bottom: 30px;
}

.chapter-marker {
  margin-bottom: 15px;
  display: flex;
  align-items: center;
  gap: 12px;
  color: var(--color-accent);
  font-family: var(--font-mono);
  font-size: 9px;
  letter-spacing: 0.12em;
}

.chapter-marker i {
  width: 72px;
  height: 1px;
  display: block;
  background: var(--color-accent-dark);
}

.manual-chapter .table-scroll {
  margin-top: 30px;
  margin-bottom: 36px;
}

.manual-chapter pre {
  margin-top: 28px;
  margin-bottom: 28px;
  font-size: 13px;
  line-height: 1.75;
}

.diagnostic-flow {
  max-width: 850px;
  margin: 34px 0;
  padding: 0;
  display: grid;
  gap: 10px;
  list-style: none;
  counter-reset: diagnostic-step;
}

.diagnostic-flow li {
  min-width: 0;
  padding: 18px 20px 18px 58px;
  position: relative;
  counter-increment: diagnostic-step;
  border: 1px solid var(--color-border-soft);
  border-radius: var(--radius-md);
  background: var(--color-panel);
}

.diagnostic-flow li::before {
  content: counter(diagnostic-step);
  width: 27px;
  height: 27px;
  position: absolute;
  top: 18px;
  left: 18px;
  display: grid;
  place-items: center;
  border: 1px solid var(--color-accent-dark);
  border-radius: var(--radius-pill);
  color: var(--color-accent);
  font-family: var(--font-mono);
  font-size: 10px;
}

.diagnostic-flow strong {
  color: var(--color-text);
  font-weight: 550;
}

.diagnostic-flow p {
  margin: 5px 0 0;
  font-size: 14px;
  line-height: 1.7;
}

@media (max-width: 1080px) {
  .manual-hero-grid {
    grid-template-columns: minmax(0, 1fr);
  }

  .signal-record {
    width: min(100%, 760px);
  }

  .manual-layout {
    grid-template-columns: 180px minmax(0, 1fr);
    gap: 42px;
  }
}

@media (max-width: 820px) {
  .manual-index {
    display: none;
  }

  .manual-layout {
    display: block;
  }

  .manual-document {
    width: 100%;
  }

  .manual-document .toc-tabs {
    display: flex;
    top: 8px;
  }
}

@media (max-width: 768px) {
  .manual-hero {
    padding-top: 44px;
    padding-bottom: 54px;
  }

  .manual-hero-copy h1 {
    font-size: clamp(34px, 10vw, 40px);
  }

  .manual-hero-lead {
    font-size: 17px;
  }

  .manual-facts {
    align-items: flex-start;
    flex-direction: column;
    gap: 5px;
  }

  .manual-facts span {
    padding: 0;
    border-right: 0;
  }

  .manual-scope {
    padding: 16px;
  }

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

  .manual-chapter h3 {
    margin-top: 34px;
  }

  .manual-chapter p {
    font-size: 16px;
    line-height: 1.82;
  }
}

@media (max-width: 520px) {
  .manual-hero-copy .title-nowrap,
  .manual-chapter .title-nowrap {
    white-space: normal;
  }

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

  .manual-hero-links .button {
    width: 100%;
  }

  .record-body {
    padding: 10px;
  }

  .record-status {
    align-items: stretch;
    flex-direction: column;
  }

  .record-status span {
    width: 100%;
  }

  .record-labels {
    font-size: 7px;
  }

  .diagnostic-flow li {
    padding: 54px 16px 16px;
  }

  .diagnostic-flow li::before {
    top: 15px;
    left: 15px;
  }
}