.guide-hero {
  position: relative;
  overflow-x: clip;
  max-width: 100%;
  background:
    radial-gradient(circle at 76% 34%, var(--color-horizon-glow), var(--color-clear) 34%),
    linear-gradient(180deg, var(--color-sky), var(--color-bg) 56%, var(--color-road));
}

.guide-hero::after {
  content: "";
  position: absolute;
  right: 0;
  bottom: 0;
  left: 0;
  height: 1px;
  background: var(--color-border);
}

.guide-hero-grid {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
}

.guide-hero-grid path {
  fill: none;
  stroke: var(--color-grid);
  stroke-width: 1;
  vector-effect: non-scaling-stroke;
}

.guide-hero-inner {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(340px, 450px);
  gap: clamp(42px, 7vw, 92px);
  align-items: center;
  min-height: 620px;
  padding-top: clamp(72px, 10vw, 120px);
  padding-bottom: clamp(72px, 10vw, 120px);
}

.guide-hero-copy h1 {
  max-width: 760px;
  margin: 18px 0 0;
}

.guide-title-tail {
  color: var(--color-accent);
}

.guide-lede {
  max-width: 690px;
  margin: 22px 0 0;
  font-size: 19px;
  line-height: 1.75;
}

.guide-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 9px;
  margin-top: 26px;
}

.guide-meta span {
  display: inline-flex;
  min-height: 30px;
  max-width: 100%;
  align-items: center;
  padding: 5px 11px;
  overflow: hidden;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-small);
  color: var(--color-text-muted);
  background: var(--color-panel);
  font-family: var(--font-mono);
  font-size: 12px;
}

.guide-actions {
  margin-top: 30px;
}

.guide-route-sign {
  position: relative;
  overflow: hidden;
  border: 1px solid var(--color-sign-highlight);
  border-radius: var(--radius-medium);
  color: var(--color-white);
  background: linear-gradient(135deg, var(--color-sign), var(--color-sign-end));
  box-shadow: inset 0 1px 0 var(--color-sign-highlight), 0 30px 56px var(--color-shadow);
}

.guide-route-sign::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, var(--color-sign-sheen), var(--color-clear));
  pointer-events: none;
}

.guide-route-head {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  padding: 22px 24px;
  border-bottom: 1px solid var(--color-sign-line);
}

.guide-route-head span {
  color: var(--color-sign-dim);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .12em;
}

.guide-route-head strong {
  font-family: var(--font-display);
  font-size: 19px;
  font-weight: 400;
}

.guide-route-list {
  position: relative;
  margin: 0;
  padding: 8px 24px 18px;
  list-style: none;
}

.guide-route-list li {
  display: grid;
  grid-template-columns: 62px 1fr;
  gap: 18px;
  align-items: center;
  min-height: 64px;
  border-bottom: 1px solid var(--color-sign-line);
}

.guide-route-list li:last-child {
  border-bottom: 0;
}

.guide-route-list span {
  color: var(--color-sign-dim);
  font-family: var(--font-mono);
  font-size: 12px;
}

.guide-route-list b {
  color: var(--color-white);
  font-size: 15px;
  font-weight: 600;
}

.guide-intro {
  border-bottom: 1px solid var(--color-border);
  background: var(--color-panel-recessed);
}

.guide-intro-grid {
  display: grid;
  grid-template-columns: minmax(260px, .8fr) minmax(0, 1.2fr);
  gap: clamp(36px, 7vw, 86px);
}

.guide-intro-grid h2 {
  margin: 20px 0 0;
  font-size: clamp(30px, 4vw, 43px);
}

.guide-intro-copy p:last-child {
  margin-bottom: 0;
}

.guide-intro-copy a,
.guide-article .prose a {
  color: var(--color-accent-dark);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.guide-article {
  padding-top: 28px;
  padding-bottom: var(--section-space);
}

.guide-article .toc-tabs {
  top: 12px;
  margin-bottom: 0;
}

.guide-chapter {
  display: grid;
  grid-template-columns: minmax(245px, .42fr) minmax(0, 1fr);
  gap: clamp(38px, 7vw, 96px);
  padding-top: clamp(76px, 10vw, 118px);
  padding-bottom: clamp(76px, 10vw, 118px);
  border-bottom: 1px solid var(--color-border);
}

.chapter-heading {
  align-self: start;
}

.chapter-heading h2 {
  margin: 0;
  font-size: clamp(32px, 3.6vw, 45px);
}

.chapter-summary {
  margin: 22px 0 0;
  font-size: 15px;
  line-height: 1.85;
}

.guide-chapter .prose {
  max-width: 850px;
}

.guide-chapter .prose h3 {
  margin-top: 46px;
  margin-bottom: 15px;
  font-family: var(--font-display);
  font-size: clamp(24px, 2.4vw, 29px);
  font-weight: 400;
}

.guide-chapter .prose h3:first-child {
  margin-top: 0;
}

.guide-chapter .prose p {
  margin-bottom: 20px;
}

.guide-chapter .table-scroll {
  margin: 34px 0;
}

.guide-chapter pre {
  margin: 30px 0;
  line-height: 1.75;
}

.diagnostic-steps {
  display: grid;
  gap: 0;
  margin: 34px 0;
  padding: 0;
  border-top: 1px solid var(--color-border);
  list-style: none;
  counter-reset: diagnostic;
}

.diagnostic-steps li {
  position: relative;
  min-height: 104px;
  padding: 25px 16px 24px 58px;
  border-bottom: 1px solid var(--color-border);
  counter-increment: diagnostic;
}

.diagnostic-steps li::before {
  content: counter(diagnostic);
  position: absolute;
  top: 24px;
  left: 4px;
  display: grid;
  width: 34px;
  height: 34px;
  place-items: center;
  border-radius: var(--radius-small);
  color: var(--color-white);
  background: var(--color-sign);
  font-family: var(--font-mono);
  font-size: 13px;
}

.diagnostic-steps strong {
  display: block;
  margin-bottom: 6px;
  color: var(--color-text);
}

.diagnostic-steps p {
  margin-bottom: 0;
}

.guide-checklist {
  margin: 38px 0;
}

.guide-checklist h3 {
  margin-top: 0;
}

.guide-checklist ul {
  display: grid;
  gap: 12px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.guide-checklist li {
  position: relative;
  padding-left: 22px;
  color: var(--color-text-muted);
  line-height: 1.7;
}

.guide-checklist li::before {
  content: "";
  position: absolute;
  top: .7em;
  left: 2px;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--color-success);
}

.guide-closing {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 36px;
  align-items: center;
  margin-top: var(--section-space);
  padding: clamp(30px, 5vw, 50px);
  border-radius: var(--radius-medium);
  color: var(--color-white);
  background: linear-gradient(135deg, var(--color-sign), var(--color-sign-end));
  box-shadow: 0 26px 52px var(--color-shadow);
}

.guide-closing .section-kicker {
  color: var(--color-sign-dim);
}

.guide-closing .section-kicker::after {
  background: var(--color-sign-line);
}

.guide-closing h2 {
  margin: 18px 0 10px;
  color: var(--color-white);
  font-size: clamp(30px, 4vw, 44px);
}

.guide-closing p {
  margin-bottom: 0;
  color: var(--color-sign-soft);
}

@media (max-width: 980px) {
  .guide-hero-inner {
    grid-template-columns: 1fr;
    min-height: 0;
  }

  .guide-route-sign {
    max-width: 620px;
  }

  .guide-chapter {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  .chapter-heading {
    max-width: 760px;
  }

  .guide-closing {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 768px) {
  .guide-intro-grid {
    grid-template-columns: 1fr;
    gap: 28px;
  }

  .guide-hero-inner {
    padding-top: 64px;
    padding-bottom: 64px;
  }

  .guide-lede {
    font-size: 17px;
  }

  .guide-chapter {
    padding-top: 72px;
    padding-bottom: 72px;
  }
}

@media (max-width: 640px) {
  .guide-hero {
    overflow-x: clip;
  }

  .guide-hero-grid {
    display: none;
  }

  .guide-hero-inner {
    gap: 42px;
  }

  .guide-meta {
    display: grid;
    grid-template-columns: 1fr;
  }

  .guide-meta span {
    width: 100%;
  }

  .guide-route-head {
    padding: 18px;
  }

  .guide-route-list {
    padding-right: 18px;
    padding-left: 18px;
  }

  .guide-route-list li {
    grid-template-columns: 58px 1fr;
  }

  .guide-article {
    padding-top: 20px;
  }

  .guide-chapter {
    gap: 30px;
  }

  .guide-chapter pre {
    padding: 16px;
    font-size: 12px;
  }

  .diagnostic-steps li {
    padding-right: 4px;
  }

  .guide-closing {
    margin-top: 64px;
  }
}