/* ==========================================================================
   LabOrdering.com — guide.css
   --------------------------------------------------------------------------
   Additive stylesheet loaded only on /guides/* pages (guide detail, guide
   index and guide cluster pages). It layers long-form reading styles on top
   of styles.css and never overrides global components such as .hero or
   .card-grid.

   Contents
   1. Guide shell & hero
   2. Quick answer & key takeaways
   3. Table of contents
   4. Guide body typography
   5. Sources
   6. Related tests, cities & guides
   7. Editorial note
   8. Guide responsive rules
   ========================================================================== */

/* ==========================================================================
   1. Guide shell & hero
   ========================================================================== */

.guide {
  max-width: 880px;
  margin-inline: auto;
}

.guide-hero {
  position: relative;
  padding: var(--space-10) 0 var(--space-8);
  border-bottom: 1px solid var(--color-border);
}

.guide-hero::before {
  content: "Guide";
  display: inline-block;
  margin-bottom: var(--space-4);
  padding: 0.2rem 0.7rem;
  background: var(--color-primary-soft);
  border-radius: var(--radius-pill);
  color: var(--color-primary-deep);
  font-family: var(--font-body);
  font-size: var(--text-xs);
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.guide-hero h1 {
  max-width: 22ch;
  margin-bottom: var(--space-4);
  font-size: clamp(1.95rem, 1.45rem + 2vw, 2.85rem);
  line-height: 1.14;
}

.guide-byline {
  margin: 0 0 var(--space-6);
  color: var(--color-muted);
  font-size: var(--text-sm);
  line-height: 1.7;
}

.guide-byline strong {
  color: var(--color-ink);
  font-weight: 600;
}

.guide-byline a {
  color: var(--color-primary);
  font-weight: 500;
}

/* ==========================================================================
   2. Quick answer & key takeaways
   ========================================================================== */

.guide-answer {
  margin-block: var(--space-8);
  padding: var(--space-6) var(--space-7);
  background: var(--color-primary-tint);
  border: 1px solid rgba(15, 118, 110, 0.18);
  border-left: 4px solid var(--color-primary);
  border-radius: 0 var(--radius-lg) var(--radius-lg) 0;
}

.guide-answer h2 {
  margin: 0 0 var(--space-2);
  font-size: var(--text-xl);
}

.guide-answer p {
  margin: 0;
  color: var(--color-body);
  font-size: var(--text-md);
  line-height: 1.7;
}

.guide-takeaways {
  margin-block: var(--space-8);
  padding: var(--space-6) var(--space-8);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-top: 3px solid var(--color-primary);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-xs);
}

.guide-takeaways h2 {
  margin: 0 0 var(--space-4);
  font-size: var(--text-xl);
}

.guide-takeaways ul {
  display: grid;
  gap: var(--space-3);
  margin: 0;
  padding: 0;
  list-style: none;
}

.guide-takeaways li {
  position: relative;
  margin: 0;
  padding-left: 1.9rem;
  color: var(--color-body);
  font-size: var(--text-sm);
  line-height: 1.65;
}

.guide-takeaways li::before {
  content: "";
  position: absolute;
  left: 0.2rem;
  top: 0.5em;
  width: 0.62rem;
  height: 0.34rem;
  border-left: 2px solid var(--color-primary);
  border-bottom: 2px solid var(--color-primary);
  transform: rotate(-45deg);
}

/* ==========================================================================
   3. Table of contents
   ========================================================================== */

.guide-toc {
  margin-block: var(--space-8);
  padding: var(--space-5) var(--space-6);
  background: var(--color-surface-alt);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
}

.guide-toc h2 {
  margin: 0 0 var(--space-3);
  color: var(--color-primary-deep);
  font-size: var(--text-md);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  font-family: var(--font-body);
  font-weight: 700;
}

.guide-toc ul {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(min(100%, 260px), 1fr));
  gap: var(--space-1) var(--space-6);
  margin: 0;
  padding: 0;
  list-style: none;
  counter-reset: toc;
}

.guide-toc li {
  counter-increment: toc;
  margin: 0;
  padding: var(--space-2) 0;
  border-bottom: 1px solid var(--color-border);
  font-size: var(--text-sm);
}

.guide-toc li::before {
  content: counter(toc) ".";
  margin-right: var(--space-2);
  color: var(--color-primary);
  font-weight: 600;
}

.guide-toc a {
  color: var(--color-body);
  text-decoration: none;
}

.guide-toc a:hover {
  color: var(--color-primary);
  text-decoration: underline;
}

/* ==========================================================================
   4. Guide body typography
   ========================================================================== */

.guide-body {
  max-width: 74ch;
  margin-block: var(--space-10);
  color: var(--color-body);
  font-size: var(--text-md);
  line-height: 1.75;
}

.guide-body > *:first-child {
  margin-top: 0;
}

.guide-body h2 {
  margin: var(--space-12) 0 var(--space-5);
  padding-top: var(--space-4);
  border-top: 1px solid var(--color-border);
  font-size: clamp(1.45rem, 1.2rem + 1vw, 1.9rem);
  line-height: 1.22;
}

.guide-body h2:first-child {
  margin-top: 0;
  padding-top: 0;
  border-top: 0;
}

.guide-body h3 {
  margin: var(--space-8) 0 var(--space-3);
  font-size: var(--text-xl);
}

.guide-body h4 {
  margin: var(--space-6) 0 var(--space-2);
  font-size: var(--text-md);
  font-family: var(--font-body);
  font-weight: 700;
}

.guide-body p {
  margin: 0 0 var(--space-5);
}

.guide-body a {
  color: var(--color-primary);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.guide-body ul,
.guide-body ol {
  margin: 0 0 var(--space-5);
  padding-left: 1.5rem;
}

.guide-body li {
  margin-bottom: var(--space-2);
}

.guide-body ul li::marker {
  color: var(--color-primary);
}

.guide-body ol li::marker {
  color: var(--color-primary);
  font-weight: 600;
}

.guide-body strong {
  color: var(--color-ink);
  font-weight: 600;
}

.guide-body blockquote {
  margin: var(--space-6) 0;
  padding: var(--space-5) var(--space-6);
  background: var(--color-surface-alt);
  border-left: 4px solid var(--color-primary);
  border-radius: 0 var(--radius) var(--radius) 0;
  color: var(--color-body);
  font-style: italic;
}

.guide-body blockquote p:last-child {
  margin-bottom: 0;
}

.guide-body table {
  width: 100%;
  margin: var(--space-6) 0;
  border-collapse: collapse;
  font-size: var(--text-sm);
  line-height: 1.55;
}

.guide-body th,
.guide-body td {
  padding: var(--space-3) var(--space-4);
  border: 1px solid var(--color-border);
  text-align: left;
  vertical-align: top;
}

.guide-body th {
  background: var(--color-surface-alt);
  color: var(--color-ink);
  font-weight: 600;
}

.guide-body tbody tr:nth-child(even) {
  background: rgba(251, 250, 247, 0.7);
}

.guide-body img {
  margin: var(--space-6) 0;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
}

.guide-body figure {
  margin: var(--space-6) 0;
}

.guide-body figcaption {
  margin-top: var(--space-2);
  color: var(--color-muted);
  font-size: var(--text-xs);
}

.guide-body code {
  padding: 0.1em 0.38em;
  background: var(--color-surface-sunk);
  border-radius: var(--radius-sm);
  font-family: var(--font-mono);
  font-size: 0.88em;
}

.guide-body pre {
  margin: var(--space-6) 0;
  padding: var(--space-4) var(--space-5);
  background: #0f1c22;
  border-radius: var(--radius);
  color: #d7e6e3;
  overflow-x: auto;
}

.guide-body pre code {
  padding: 0;
  background: transparent;
  color: inherit;
}

.guide-body hr {
  margin: var(--space-8) 0;
}

/* ==========================================================================
   5. Sources
   ========================================================================== */

.guide-sources {
  margin-block: var(--space-12);
  padding-top: var(--space-8);
  border-top: 1px solid var(--color-border);
}

.guide-sources h2 {
  font-size: var(--text-xl);
}

.guide-sources ol {
  display: grid;
  gap: var(--space-2);
  margin: 0;
  padding-left: 1.35rem;
  font-size: var(--text-sm);
  line-height: 1.65;
}

.guide-sources a {
  color: var(--color-primary-dark);
  overflow-wrap: anywhere;
}

.guide-sources li::marker {
  color: var(--color-muted);
  font-weight: 600;
}

/* ==========================================================================
   6. Related tests, cities & guides
   ========================================================================== */

.guide-related,
.guide-cities,
.guide-more {
  margin-block: var(--space-12);
}

.guide-related h2,
.guide-cities h2,
.guide-more h2 {
  margin-bottom: var(--space-5);
  font-size: var(--text-xl);
}

.guide-cities .link-list,
.guide-more .link-list {
  grid-template-columns: repeat(auto-fill, minmax(min(100%, 200px), 1fr));
}

/* ==========================================================================
   7. Editorial note
   ========================================================================== */

.guide-editorial {
  margin-block: var(--space-12) var(--space-6);
  padding: var(--space-5) var(--space-6);
  background: var(--color-surface-alt);
  border: 1px solid var(--color-border);
  border-left: 4px solid var(--color-accent);
  border-radius: 0 var(--radius-lg) var(--radius-lg) 0;
  color: var(--color-muted);
  font-size: var(--text-sm);
  line-height: 1.7;
}

.guide-editorial p {
  margin: 0;
}

/* ==========================================================================
   8. Guide responsive rules
   ========================================================================== */

@media (max-width: 640px) {
  .guide-hero {
    padding-top: var(--space-8);
  }

  .guide-hero h1 {
    max-width: none;
  }

  .guide-answer,
  .guide-takeaways,
  .guide-toc,
  .guide-editorial {
    padding: var(--space-5);
  }

  .guide-body {
    font-size: var(--text-base);
  }

  .guide-body h2 {
    margin-top: var(--space-10);
  }
}