/* ============================================================= */
/* KNOWLEDGE LAYER                                               */
/* Machine-readable Q&A pages for LLM + search + human access    */
/* ============================================================= */

/* --- Index page --- */
.kn-index-hero {
  padding: 140px 0 72px;
  border-bottom: 1px solid var(--rule);
}
.kn-index-hero-inner { max-width: 680px; }
.kn-index-eyebrow {
  display: flex; align-items: center; gap: 14px;
  font-family: 'JetBrains Mono', monospace; font-size: 11px;
  text-transform: uppercase; letter-spacing: 0.16em; color: var(--gold); margin-bottom: 28px;
}
.kn-index-eyebrow::before { content: ''; width: 28px; height: 1px; background: var(--gold); }
.kn-index-h {
  font-family: 'Fraunces', serif; font-size: clamp(30px, 3.6vw, 48px);
  font-weight: 500; line-height: 1.2; margin-bottom: 20px; letter-spacing: -0.02em;
}
.kn-index-sub {
  font-size: 17px; color: var(--ink-2); line-height: 1.65; max-width: 60ch;
  font-family: 'Fraunces', serif; font-weight: 400;
}

.kn-category-section { padding: 64px 0; border-top: 1px solid var(--rule); }
.kn-category-label {
  display: flex; align-items: center; gap: 16px;
  font-family: 'JetBrains Mono', monospace; font-size: 11px;
  text-transform: uppercase; letter-spacing: 0.16em; color: var(--ink-3); margin-bottom: 32px;
}
.kn-category-label::after { content: ''; flex: none; width: 48px; height: 1px; background: var(--rule-strong); }

.kn-card-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.kn-card {
  display: block; padding: 28px 24px; border: 1px solid var(--rule);
  border-radius: 4px; background: var(--surface); transition: border-color 0.2s;
}
.kn-card:hover { border-color: rgba(196,160,74,0.45); }
.kn-card-q {
  font-family: 'Fraunces', serif; font-size: 16px; font-weight: 500;
  line-height: 1.35; color: var(--ink); margin-bottom: 10px; transition: color 0.2s;
}
.kn-card:hover .kn-card-q { color: var(--gold-2); }
.kn-card-a {
  font-size: 13.5px; color: var(--ink-3); line-height: 1.55;
  display: -webkit-box; -webkit-line-clamp: 3; -webkit-box-orient: vertical; overflow: hidden;
}

/* --- Question page --- */
.kn-article { padding: 120px 0 80px; }
.kn-article-inner { max-width: 720px; }

.kn-breadcrumb {
  font-family: 'JetBrains Mono', monospace; font-size: 11px;
  text-transform: uppercase; letter-spacing: 0.14em;
  color: var(--ink-3); margin-bottom: 40px;
}
.kn-breadcrumb a { color: var(--ink-3); transition: color 0.15s; }
.kn-breadcrumb a:hover { color: var(--gold); }
.kn-bc-sep { margin: 0 8px; opacity: 0.5; }

.kn-eyebrow {
  display: flex; align-items: center; gap: 12px;
  font-family: 'JetBrains Mono', monospace; font-size: 10.5px;
  text-transform: uppercase; letter-spacing: 0.16em; color: var(--gold); margin-bottom: 20px;
}
.kn-eyebrow::before { content: ''; width: 20px; height: 1px; background: var(--gold); }

.kn-h1 {
  font-family: 'Fraunces', serif; font-size: clamp(26px, 3.2vw, 40px);
  font-weight: 500; line-height: 1.25; margin-bottom: 28px; letter-spacing: -0.015em;
}

.kn-answer {
  font-size: 17px; line-height: 1.7; color: var(--ink-2); margin-bottom: 48px;
  font-family: 'Fraunces', serif; font-weight: 400;
}
.kn-answer p { margin-bottom: 16px; }
.kn-answer p:last-child { margin-bottom: 0; }

.kn-section { margin-bottom: 40px; }
.kn-section h2 {
  font-size: 14px; font-weight: 600; text-transform: uppercase;
  letter-spacing: 0.08em; color: var(--ink); margin-bottom: 16px;
}

.kn-keypoints { list-style: none; padding: 0; margin: 0; }
.kn-keypoints li {
  padding: 10px 0 10px 24px; position: relative;
  font-size: 15px; line-height: 1.65; color: var(--ink-2);
  border-bottom: 1px solid var(--rule);
}
.kn-keypoints li:last-child { border-bottom: none; }
.kn-keypoints li::before {
  content: ''; position: absolute; left: 0; top: 18px;
  width: 8px; height: 1px; background: var(--gold);
}

.kn-prose {
  font-size: 15px; line-height: 1.7; color: var(--ink-2);
}
.kn-prose p { margin-bottom: 14px; }
.kn-prose p:last-child { margin-bottom: 0; }
.kn-prose strong { color: var(--ink); font-weight: 600; }
.kn-prose a { color: var(--gold-2); border-bottom: 1px solid rgba(196,160,74,0.3); transition: border-color 0.15s; }
.kn-prose a:hover { border-bottom-color: var(--gold); }

/* Link boxes */
.kn-links {
  display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 24px;
  margin: 48px 0; padding: 28px; background: var(--bg-2);
  border: 1px solid var(--rule); border-radius: 4px;
}
.kn-links-group h3 {
  font-family: 'JetBrains Mono', monospace; font-size: 10px;
  text-transform: uppercase; letter-spacing: 0.14em;
  color: var(--ink-3); margin-bottom: 14px;
}
.kn-links-group ul { list-style: none; padding: 0; margin: 0; }
.kn-links-group li { margin-bottom: 8px; }
.kn-links-group a {
  font-size: 14px; color: var(--gold-2);
  border-bottom: 1px solid transparent; transition: border-color 0.15s;
}
.kn-links-group a:hover { border-bottom-color: var(--gold); }

/* Guide deep-link */
.kn-guide-link {
  margin: 48px 0 0; padding: 24px 0; border-top: 1px solid var(--rule);
}
.kn-guide-link a {
  display: inline-flex; align-items: center; gap: 10px;
  font-size: 15px; font-weight: 600; color: var(--gold-2);
  transition: color 0.15s;
}
.kn-guide-link a:hover { color: var(--gold); }
.kn-guide-link .arrow { font-size: 18px; transition: transform 0.15s; }
.kn-guide-link a:hover .arrow { transform: translateX(4px); }

/* Index CTA */
.kn-cta { padding: 80px 0; border-top: 1px solid var(--rule); text-align: center; }
.kn-cta-inner { max-width: 560px; margin: 0 auto; }
.kn-cta-h {
  font-family: 'Fraunces', serif; font-size: clamp(22px, 2.4vw, 30px);
  font-weight: 500; line-height: 1.3; margin-bottom: 16px;
}
.kn-cta-h em { font-style: italic; color: var(--gold-2); font-weight: 400; }
.kn-cta-sub { font-size: 15px; color: var(--ink-2); line-height: 1.6; margin-bottom: 28px; }
.kn-cta-row { display: flex; justify-content: center; gap: 12px; flex-wrap: wrap; }

/* Responsive */
@media (max-width: 900px) {
  .kn-card-grid { grid-template-columns: repeat(2, 1fr); }
  .kn-links { grid-template-columns: 1fr; }
}
@media (max-width: 600px) {
  .kn-card-grid { grid-template-columns: 1fr; }
  .kn-article { padding: 100px 0 60px; }
}