.manual-hero {
  position: relative;
  overflow-x: clip;
  padding-top: 54px;
  padding-bottom: 42px;
}

.manual-hero::before {
  position: absolute;
  z-index: -1;
  top: -110px;
  right: -90px;
  width: 680px;
  height: 560px;
  background: radial-gradient(circle, var(--color-glow-core) 0, var(--color-glow-mid) 38%, var(--color-glow-clear) 72%);
  content: "";
  pointer-events: none;
}

.manual-hero-panel {
  display: grid;
  grid-template-columns: minmax(0, 1.35fr) minmax(280px, .65fr);
  align-items: center;
  gap: 56px;
  padding: clamp(32px, 6vw, 68px);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-section);
  background: var(--color-canvas);
  box-shadow: var(--shadow-deep);
}

.manual-hero-copy {
  max-width: 700px;
}

.manual-hero h1 {
  max-width: 680px;
  font-size: clamp(34px, 4vw, 48px);
}

.manual-lead {
  max-width: 680px;
  margin-bottom: 28px;
  color: var(--color-ink-soft);
  font-size: clamp(17px, 1.8vw, 21px);
  line-height: 1.75;
}

.manual-route {
  padding: 28px;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-panel);
  background: var(--color-panel);
  box-shadow: var(--shadow-soft);
}

.manual-route > strong {
  display: block;
  margin-bottom: 18px;
  font-family: var(--font-display);
  font-size: 18px;
}

.manual-route ol {
  display: grid;
  gap: 15px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.manual-route li {
  display: flex;
  align-items: center;
  gap: 12px;
  color: var(--color-ink-soft);
}

.manual-route li span {
  display: inline-flex;
  width: 38px;
  height: 38px;
  flex: 0 0 auto;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-pill);
  background: var(--color-canvas);
  color: var(--color-brand-strong);
  font: 700 12px/1 var(--font-mono);
}

.manual-intro {
  padding-top: 46px;
  padding-bottom: 38px;
}

.manual-intro p {
  color: var(--color-ink-soft);
  font-size: 17px;
}

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

.manual-layout {
  position: relative;
}

.manual-layout .toc-tabs {
  top: 12px;
}

.manual-prose {
  width: 100%;
  max-width: var(--reading-width);
  margin-inline: auto;
}

.manual-chapter {
  padding-top: 42px;
  padding-bottom: 58px;
  border-bottom: 1px solid var(--color-line);
  scroll-margin-top: 86px;
}

.manual-chapter:first-child {
  padding-top: 18px;
}

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

.chapter-index {
  display: inline-flex;
  margin-bottom: 12px;
  padding: 5px 13px;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-pill);
  background: var(--color-panel-warm);
  color: var(--color-brand-strong);
  font-size: 12px;
  font-weight: 750;
}

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

.manual-prose h3 {
  font-size: clamp(20px, 2vw, 25px);
}

.manual-prose p,
.manual-prose li {
  color: var(--color-ink-soft);
}

.manual-prose strong {
  color: var(--color-ink);
}

.manual-prose .table-wrap {
  margin: 32px 0;
}

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

.diagnostic-steps {
  display: grid;
  gap: 12px;
  margin: 26px 0 30px;
  padding: 0;
  counter-reset: diagnostic;
  list-style: none;
}

.diagnostic-steps li {
  position: relative;
  min-height: 52px;
  padding: 18px 18px 18px 62px;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-card);
  background: var(--color-panel);
  counter-increment: diagnostic;
}

.diagnostic-steps li::before {
  position: absolute;
  top: 17px;
  left: 17px;
  display: inline-flex;
  width: 30px;
  height: 30px;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-pill);
  background: var(--color-brand);
  color: var(--color-white-text);
  content: counter(diagnostic);
  font: 700 12px/1 var(--font-mono);
}

.manual-next {
  max-width: var(--reading-width);
  margin: 72px auto 0;
  background: var(--color-panel-warm);
}

.manual-next-title {
  display: block;
  margin-bottom: 10px;
  color: var(--color-ink);
  font-family: var(--font-display);
  font-size: clamp(22px, 2.5vw, 28px);
}

.manual-next p {
  color: var(--color-ink-soft);
}

@media (max-width: 900px) {
  .manual-hero-panel {
    grid-template-columns: 1fr;
    gap: 34px;
  }

  .manual-route {
    max-width: 580px;
  }
}

@media (max-width: 640px) {
  .manual-hero {
    padding-top: 28px;
    padding-bottom: 24px;
  }

  .manual-hero::before {
    width: 430px;
    height: 410px;
  }

  .manual-hero-panel {
    gap: 26px;
    padding: 24px 21px;
    border-radius: var(--radius-panel);
  }

  .manual-hero h1 {
    font-size: clamp(27px, 8vw, 30px);
  }

  .manual-lead {
    font-size: 16px;
  }

  .manual-route {
    padding: 20px;
  }

  .manual-intro {
    padding-top: 34px;
    padding-bottom: 24px;
  }

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

  .manual-body {
    padding-top: 22px;
  }

  .manual-chapter {
    padding-top: 30px;
    padding-bottom: 44px;
    scroll-margin-top: 78px;
  }

  .manual-prose h3 {
    font-size: 20px;
  }

  .diagnostic-steps li {
    padding: 16px 16px 16px 56px;
  }

  .diagnostic-steps li::before {
    top: 15px;
    left: 14px;
  }

  .manual-next {
    margin-top: 50px;
  }
}