/* Study-guide pages.
 *
 * Layered on top of assets/style.css so the guides inherit the site's fonts,
 * colours and header/footer treatment. Only long-form reading styles live here
 * — the SPA has no article layout of its own.
 */

.guide-body {
  display: block;
  min-height: 100vh;
}

.guide-main {
  display: block;
  padding: 48px 24px 64px;
}

.guide-container {
  width: 100%;
  max-width: 760px;
  margin: 0 auto;
}

.guide-nav-link {
  margin-left: auto;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 0.85rem;
  color: var(--primary);
  text-decoration: none;
  padding: 8px 16px;
  border-radius: 999px;
  border: 1px solid var(--border-color);
  background: var(--bg-card);
  transition: var(--transition);
}

.guide-nav-link:hover {
  border-color: var(--primary);
  box-shadow: 0 2px 8px var(--primary-glow);
}

/* --- Breadcrumb --- */
.guide-breadcrumb {
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-bottom: 20px;
}

.guide-breadcrumb a {
  color: var(--text-secondary);
  text-decoration: none;
}

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

/* --- Article --- */
.guide-article .guide-eyebrow,
.guide-eyebrow {
  font-family: var(--font-display);
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--primary);
  margin-bottom: 10px;
}

.guide-article h1 {
  font-family: var(--font-display);
  font-size: clamp(1.9rem, 5vw, 2.6rem);
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: -0.02em;
  color: var(--text-primary);
  margin-bottom: 18px;
}

.guide-lede {
  font-size: 1.08rem;
  line-height: 1.7;
  color: var(--text-secondary);
  margin-bottom: 40px;
}

.guide-article h2 {
  font-family: var(--font-display);
  font-size: 1.45rem;
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--text-primary);
  margin: 44px 0 16px;
  padding-top: 24px;
  border-top: 1px solid var(--border-color);
}

.guide-article h3 {
  font-family: var(--font-display);
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 8px;
}

.guide-article p {
  line-height: 1.75;
  color: var(--text-secondary);
  margin-bottom: 16px;
}

.guide-stat {
  font-size: 0.9rem;
  color: var(--text-muted);
}

.guide-stat strong {
  color: var(--text-secondary);
}

/* --- Concept cards --- */
.guide-concept {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-left: 3px solid var(--primary);
  border-radius: var(--radius-sm);
  padding: 20px 22px;
  margin-bottom: 14px;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.03);
}

.guide-concept p {
  margin-bottom: 0;
  font-size: 0.95rem;
}

/* --- Key points list --- */
.guide-facts ul {
  list-style: none;
  padding: 0;
}

.guide-facts li {
  position: relative;
  padding: 0 0 0 26px;
  margin-bottom: 14px;
  line-height: 1.7;
  color: var(--text-secondary);
  font-size: 0.95rem;
}

.guide-facts li::before {
  content: "";
  position: absolute;
  left: 6px;
  top: 0.65em;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--primary);
}

/* --- Call to action --- */
.guide-cta {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 28px;
  text-align: center;
  margin-top: 44px;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.03);
}

.guide-cta h2 {
  border-top: none;
  padding-top: 0;
  margin-top: 0;
}

/* --- Related / index grid --- */
.guide-related ul {
  list-style: none;
  padding: 0;
}

.guide-related li {
  margin-bottom: 10px;
}

.guide-related a {
  color: var(--primary);
  text-decoration: none;
  font-weight: 500;
}

.guide-related a:hover {
  text-decoration: underline;
}

.guide-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 14px;
}

.guide-card {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 20px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  text-decoration: none;
  transition: var(--transition);
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.03);
}

.guide-card:hover {
  transform: translateY(-2px);
  border-color: var(--primary);
  box-shadow: 0 6px 18px var(--primary-glow);
}

.guide-card-title {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1rem;
  color: var(--text-primary);
  line-height: 1.35;
}

.guide-card-meta {
  font-size: 0.8rem;
  color: var(--text-secondary);
}

/* --- FAQ --- */
/* Uses <details> so the answers are in the DOM for crawlers and screen readers
   even while visually collapsed. FAQPage schema is emitted alongside. */
.guide-faq details {
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  background: var(--bg-card);
  margin-bottom: 10px;
  overflow: hidden;
}

.guide-faq summary {
  cursor: pointer;
  padding: 15px 18px;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 0.95rem;
  color: var(--text-primary);
  list-style: none;
  display: flex;
  align-items: flex-start;
  gap: 10px;
}

.guide-faq summary::-webkit-details-marker { display: none; }

.guide-faq summary::before {
  content: "+";
  flex-shrink: 0;
  font-weight: 700;
  color: var(--primary);
  line-height: 1.4;
}

.guide-faq details[open] summary::before { content: "−"; }

.guide-faq summary:hover { color: var(--primary); }

.guide-faq details p {
  margin: 0;
  padding: 0 18px 16px 40px;
  font-size: 0.93rem;
  color: var(--text-secondary);
}

@media (max-width: 600px) {
  .guide-main { padding: 32px 18px 48px; }
  .guide-article h2 { font-size: 1.25rem; }
  .guide-nav-link { font-size: 0.78rem; padding: 7px 12px; }
}