/*
 * knowledge-hub.css
 * Shared styles for Phase 5 Knowledge Hub pages
 * Include after style.css
 */

/* ── Hero ──────────────────────────────────────────────────── */
.kb-hero {
  background: linear-gradient(135deg, #1A1814 0%, #2A2318 55%, #1A1814 100%);
  padding: 48px 0 40px;
  position: relative;
  overflow: hidden;
}
.kb-hero::before {
  content: '';
  position: absolute;
  top: -30%; right: -5%;
  width: 360px; height: 360px;
  background: radial-gradient(circle, rgba(201,147,26,.1) 0%, transparent 70%);
  pointer-events: none;
}
.kb-hero-inner { position: relative; z-index: 1; }
.kb-tag {
  display: inline-block;
  background: rgba(201,147,26,.15);
  border: 1px solid rgba(201,147,26,.3);
  color: var(--gold);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 1.2px;
  text-transform: uppercase;
  padding: 4px 14px;
  border-radius: 20px;
  margin-bottom: 14px;
}
.kb-hero h1 {
  color: var(--white);
  font-size: clamp(24px, 3.5vw, 42px);
  line-height: 1.2;
  margin-bottom: 14px;
  max-width: 780px;
}
.kb-hero h1 em { font-style: normal; color: var(--gold); }
.kb-hero-desc {
  color: #B8B4A8;
  font-size: 16px;
  max-width: 640px;
  line-height: 1.75;
  margin-bottom: 0;
}

/* ── Layout ────────────────────────────────────────────────── */
.kb-layout {
  display: grid;
  grid-template-columns: 1fr 280px;
  gap: 40px;
  padding: 44px 0 60px;
  align-items: start;
}

/* ── Sidebar ───────────────────────────────────────────────── */
.kb-toc {
  background: var(--white);
  border: 0.5px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 20px;
  position: sticky;
  top: 80px;
}
.kb-toc-title {
  font-size: 12px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--ink);
  margin-bottom: 12px;
  padding-bottom: 10px;
  border-bottom: 0.5px solid var(--border);
}
.kb-toc ul { list-style: none; }
.kb-toc ul li { margin-bottom: 5px; }
.kb-toc ul a {
  font-size: 13px;
  color: var(--ink3);
  display: flex;
  gap: 7px;
  align-items: flex-start;
  line-height: 1.4;
  padding: 3px 0;
  transition: color 0.2s;
}
.kb-toc ul a:hover { color: var(--gold-dk); }
.kb-toc ul a::before {
  content: '→';
  color: var(--gold);
  font-size: 11px;
  flex-shrink: 0;
  margin-top: 2px;
}
.kb-toc-div {
  font-size: 10px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--ink4);
  margin: 10px 0 5px;
}
.kb-sidebar-cta {
  background: linear-gradient(135deg, #1A1814, #2D2518);
  border-radius: var(--radius-md);
  padding: 18px;
  margin-top: 14px;
  border: 1px solid rgba(201,147,26,.25);
  text-align: center;
  position: static;
}
.kb-sidebar-cta h4 { font-size: 14px; color: var(--white); margin-bottom: 6px; }
.kb-sidebar-cta p  { font-size: 12px; color: #9A9790; margin-bottom: 12px; }
.kb-sidebar-cta .btn { font-size: 12px; padding: 9px 16px; width: 100%; justify-content: center; margin-bottom: 7px; display: flex; }

/* ── Article body ──────────────────────────────────────────── */
.kb-body h2 {
  font-size: clamp(19px, 2.4vw, 26px);
  margin: 38px 0 12px;
  color: var(--ink);
  scroll-margin-top: 80px;
  padding-bottom: 8px;
  border-bottom: 2px solid var(--gold-lt);
}
.kb-body h2:first-child { margin-top: 0; }
.kb-body h3 { font-size: 19px; margin: 24px 0 8px; color: var(--ink); }
.kb-body p  { font-size: 15px; line-height: 1.9; color: var(--ink3); margin-bottom: 14px; }
.kb-body ul, .kb-body ol { padding-left: 22px; margin-bottom: 14px; }
.kb-body li { font-size: 14px; line-height: 1.8; color: var(--ink3); margin-bottom: 6px; }
.kb-body strong { color: var(--ink2); }
.kb-body a { color: var(--gold-dk); border-bottom: 1px solid transparent; }
.kb-body a:hover { border-bottom-color: var(--gold); }

/* callouts */
.kb-callout {
  border-radius: var(--radius-md);
  padding: 16px 20px;
  margin: 20px 0;
  display: flex;
  gap: 12px;
  align-items: flex-start;
}
.kb-callout-icon { font-size: 18px; flex-shrink: 0; line-height: 1; margin-top: 2px; }
.kb-callout-body h4 { font-size: 14px; font-weight: 600; margin-bottom: 4px; }
.kb-callout-body p  { font-size: 13px; line-height: 1.6; margin: 0; }
.kb-callout.gold  { background: var(--gold-lt);  border: 1px solid #DFC980; }
.kb-callout.gold  .kb-callout-body h4 { color: var(--gold-dk); }
.kb-callout.gold  .kb-callout-body p  { color: var(--gold-deep); }
.kb-callout.blue  { background: var(--blue-lt);  border: 1px solid #B8D8EE; }
.kb-callout.blue  .kb-callout-body h4 { color: var(--blue); }
.kb-callout.blue  .kb-callout-body p  { color: var(--blue); }
.kb-callout.green { background: var(--green-lt); border: 1px solid #A8D8C0; }
.kb-callout.green .kb-callout-body h4 { color: var(--green); }
.kb-callout.green .kb-callout-body p  { color: var(--green); }

/* data tables */
.kb-table {
  width: 100%;
  border-collapse: collapse;
  margin: 18px 0;
  font-size: 13px;
}
.kb-table th {
  background: var(--ink);
  color: var(--white);
  padding: 9px 13px;
  text-align: left;
  font-weight: 500;
}
.kb-table td {
  padding: 9px 13px;
  border-bottom: 0.5px solid var(--border);
  color: var(--ink2);
  line-height: 1.5;
}
.kb-table tr:nth-child(even) td { background: var(--cream); }

/* key facts strip */
.kb-facts {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
  margin: 20px 0;
}
.kb-fact {
  background: var(--white);
  border: 0.5px solid var(--border);
  border-radius: var(--radius-md);
  padding: 16px;
  text-align: center;
}
.kb-fact-num   { font-family: var(--font-d); font-size: 26px; font-weight: 700; color: var(--gold); line-height: 1; margin-bottom: 5px; }
.kb-fact-label { font-size: 12px; color: var(--ink3); line-height: 1.4; }

/* step list */
.kb-steps { list-style: none; padding: 0; margin: 18px 0; }
.kb-step  { display: flex; gap: 14px; margin-bottom: 18px; align-items: flex-start; }
.kb-step-num {
  width: 34px; height: 34px;
  background: var(--gold);
  color: var(--white);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-d);
  font-size: 15px;
  font-weight: 700;
  flex-shrink: 0;
}
.kb-step-body h4 { font-size: 15px; color: var(--ink); margin-bottom: 3px; }
.kb-step-body p  { font-size: 13px; color: var(--ink3); margin: 0; line-height: 1.65; }

/* check list */
.kb-checklist { list-style: none; padding: 0; margin: 14px 0; }
.kb-checklist li {
  display: flex;
  gap: 8px;
  align-items: flex-start;
  font-size: 14px;
  color: var(--ink3);
  padding: 5px 0;
  border-bottom: 0.5px solid var(--border);
  line-height: 1.6;
}
.kb-checklist li:last-child { border-bottom: none; }
.kb-checklist li::before { content: '✓'; color: var(--green); font-weight: 700; font-size: 13px; flex-shrink: 0; margin-top: 2px; }

/* mid CTA */
.kb-mid-cta {
  background: linear-gradient(135deg, #1A1814, #2D2518);
  border-radius: var(--radius-lg);
  padding: 24px 28px;
  margin: 32px 0;
  border: 1px solid rgba(201,147,26,.2);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  flex-wrap: wrap;
}
.kb-mid-cta h3 { font-size: 18px; color: var(--white); margin: 0 0 5px; }
.kb-mid-cta p  { font-size: 13px; color: #9A9790; margin: 0; }

/* related grid */
.kb-related {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 10px;
  margin-top: 16px;
}
.kb-related-card {
  background: var(--white);
  border: 0.5px solid var(--border);
  border-radius: var(--radius-md);
  padding: 14px;
  text-decoration: none;
  display: flex;
  gap: 10px;
  align-items: flex-start;
  transition: all 0.2s;
}
.kb-related-card:hover { border-color: var(--gold); background: var(--gold-lt); }
.kb-rc-icon  { font-size: 20px; flex-shrink: 0; margin-top: 2px; }
.kb-rc-title { font-size: 13px; font-weight: 500; color: var(--ink); margin-bottom: 2px; line-height: 1.3; }
.kb-rc-sub   { font-size: 11px; color: var(--ink4); }

/* formula box */
.kb-formula {
  background: var(--cream);
  border: 1px solid var(--border);
  border-left: 4px solid var(--gold);
  border-radius: var(--radius-sm);
  padding: 16px 20px;
  margin: 16px 0;
  font-family: 'Courier New', monospace;
  font-size: 14px;
  color: var(--ink);
  line-height: 1.8;
}
.kb-formula strong { color: var(--gold-dk); }

/* ── Responsive ─────────────────────────────────────────────── */
@media (max-width: 1024px) {
  .kb-layout { grid-template-columns: 1fr; }
  .kb-toc    { position: static; }
  .kb-facts  { grid-template-columns: repeat(3, 1fr); }
}
@media (max-width: 600px) {
  .kb-facts   { grid-template-columns: 1fr 1fr; }
  .kb-related { grid-template-columns: 1fr; }
  .kb-mid-cta { flex-direction: column; }
}