/* ==========================================================================
   LabRequests — guide layer
   Loaded only on /guides/* pages (via extraHead) and scoped under .guide /
   .guide-* so it cannot affect any other page. Inherits the design tokens
   defined in styles.css.
   ========================================================================== */

.guide {
  max-width: 860px;
  margin: 0 auto;
}

.guide-hero {
  margin: 0 0 2rem;
}
.guide-hero h1 {
  font-family: var(--font-display);
  font-size: clamp(1.7rem, 1.25rem + 2.4vw, 2.5rem);
  line-height: 1.15;
  font-weight: 700;
  letter-spacing: -0.015em;
  color: var(--ink);
  margin-bottom: 0.8rem;
  text-wrap: balance;
}
.guide-hero .lead {
  font-size: 1.13rem;
  color: var(--muted);
  margin-bottom: 1rem;
}
.guide-hero .cta-btn {
  display: inline-block;
}

.guide-byline {
  font-size: 0.85rem;
  color: var(--muted);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  padding: 0.65rem 0;
  margin: 0 0 1.35rem;
}
.guide-byline strong {
  color: var(--ink-2);
}

/* Quick answer — answer-first block for AI/featured snippets */
.guide-answer {
  position: relative;
  border-left: 5px solid var(--brand);
  background: var(--brand-soft);
  border-radius: var(--radius-sm);
  padding: 1.1rem 1.35rem;
  margin: 0 0 1.5rem;
}
.guide-answer h2 {
  font-family: var(--font-body);
  font-size: 0.76rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--brand-dark);
  margin: 0 0 0.45rem;
}
.guide-answer h2::before {
  display: none;
}
.guide-answer p {
  margin: 0;
  font-size: 1.06rem;
  color: var(--ink-2);
  line-height: 1.6;
}

.guide-takeaways {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 1.2rem 1.4rem;
  margin: 0 0 2rem;
  box-shadow: var(--shadow-xs);
}
.guide-takeaways h2 {
  font-family: var(--font-display);
  font-size: 1.2rem;
  margin: 0 0 0.65rem;
  color: var(--ink);
}
.guide-takeaways ul {
  margin: 0 0 0 1.15rem;
}
.guide-takeaways li {
  margin-bottom: 0.45rem;
  color: var(--muted);
}

.guide-toc {
  background: var(--brand-tint);
  border: 1px solid var(--border);
  border-left: 5px solid var(--brand-light);
  border-radius: var(--radius-sm);
  padding: 1.1rem 1.35rem;
  margin: 0 0 2rem;
}
.guide-toc h2 {
  font-family: var(--font-body);
  font-size: 0.76rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--muted);
  margin: 0 0 0.6rem;
}
.guide-toc h2::before {
  display: none;
}
.guide-toc ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0.4rem;
}
.guide-toc a {
  font-weight: 600;
  color: var(--brand-dark);
}

/* ---------------------------------------------------------- Article body */
.guide-body {
  font-size: 1.02rem;
}
.guide-body h2 {
  font-family: var(--font-display);
  font-size: 1.48rem;
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--ink);
  margin: 2.4rem 0 0.8rem;
  padding-bottom: 0.45rem;
  border-bottom: 2px solid var(--brand-soft);
  scroll-margin-top: 5rem;
}
.guide-body h3 {
  font-size: 1.14rem;
  font-weight: 700;
  color: var(--ink-2);
  margin: 1.6rem 0 0.5rem;
}
.guide-body p {
  margin: 0 0 1rem;
}
.guide-body ul,
.guide-body ol {
  margin: 0 0 1rem 1.3rem;
}
.guide-body li {
  margin-bottom: 0.45rem;
}
.guide-body a {
  font-weight: 500;
}
.guide-body table {
  width: 100%;
  border-collapse: collapse;
  margin: 0 0 1.35rem;
  font-size: 0.95rem;
  border: 1px solid var(--border);
  border-radius: var(--radius-xs);
  overflow: hidden;
}
.guide-body th,
.guide-body td {
  border: 1px solid var(--border);
  padding: 0.6rem 0.8rem;
  text-align: left;
}
.guide-body th {
  background: var(--brand-soft);
  font-weight: 700;
  color: var(--ink-2);
}
.guide-body blockquote {
  border-left: 4px solid var(--brand-light);
  background: var(--brand-tint);
  margin: 0 0 1.35rem;
  padding: 0.85rem 1.1rem;
  color: var(--ink-2);
  border-radius: 0 var(--radius-xs) var(--radius-xs) 0;
}
.guide-body img {
  border-radius: var(--radius-sm);
}

/* --------------------------------------------------------- Guide sections */
.guide-faq,
.guide-related,
.guide-cities,
.guide-more,
.guide-sources {
  margin-top: 2.6rem;
}
.guide-faq h2,
.guide-related h2,
.guide-cities h2,
.guide-more h2,
.guide-sources h2 {
  font-family: var(--font-display);
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--ink);
  margin-bottom: 1rem;
}

.guide-sources ol {
  margin: 0 0 0 1.3rem;
  font-size: 0.92rem;
  color: var(--muted);
}
.guide-sources li {
  margin-bottom: 0.55rem;
}

.link-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(230px, 1fr));
  gap: 0.5rem 1.25rem;
}
.link-list a {
  font-weight: 600;
  color: var(--brand-dark);
}

.guide-editorial {
  margin-top: 2.6rem;
  padding: 1.1rem 1.35rem;
  background: var(--brand-tint);
  border: 1px solid var(--border);
  border-left: 5px solid var(--brand);
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
  color: var(--muted);
}

@media (max-width: 640px) {
  .guide-toc ul {
    grid-template-columns: 1fr;
  }
  .guide-body {
    font-size: 1rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  .guide * {
    transition-duration: 0.001ms !important;
  }
}