/* ── KNOWLEDGE CENTER — SHARED ARTICLE STYLES ──────── */
/* Imports site tokens from ../style.css via the page's <link> */

/* ── ARTICLE NAV ──────────────────────────────────── */
.kc-breadcrumb {
  margin-top: 70px; /* offset fixed nav */
  padding: 1rem 2rem;
  font-family: var(--font-mono);
  font-size: 0.65rem;
  letter-spacing: 0.08em;
  color: var(--text-dim);
  border-bottom: 1px solid var(--border);
  background: var(--surface);
}
.kc-breadcrumb a { color: var(--gold); text-decoration: none; }
.kc-breadcrumb a:hover { text-decoration: underline; }
.kc-breadcrumb span { margin: 0 0.5rem; opacity: 0.4; }

/* ── ARTICLE HERO ─────────────────────────────────── */
.kc-hero {
  background: linear-gradient(135deg, #0d1117 0%, #111827 60%, #1a1f2e 100%);
  border-bottom: 1px solid var(--border);
  padding: 4rem 2rem 3rem;
}
.kc-hero-inner {
  max-width: 820px;
  margin: 0 auto;
}
.kc-category-badge {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.58rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  padding: 0.3rem 0.75rem;
  border-radius: 2rem;
  margin-bottom: 1.25rem;
}
.kc-category-badge.waterproofing  { background: rgba(30,90,168,0.2); color: #6fa3e0; border: 1px solid rgba(30,90,168,0.35); }
.kc-category-badge.structural     { background: rgba(243,156,18,0.15); color: #f3ae45; border: 1px solid rgba(243,156,18,0.3); }
.kc-category-badge.diagnostics    { background: rgba(46,160,100,0.15); color: #5ecc8b; border: 1px solid rgba(46,160,100,0.3); }

.kc-title {
  font-family: var(--font-display);
  font-size: clamp(2rem, 5vw, 3.2rem);
  line-height: 1.1;
  color: var(--text);
  margin: 0 0 1rem;
}
.kc-subtitle {
  font-size: 1.05rem;
  color: var(--text-muted);
  line-height: 1.65;
  margin: 0 0 1.5rem;
  max-width: 680px;
}
.kc-meta {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  flex-wrap: wrap;
  font-family: var(--font-mono);
  font-size: 0.62rem;
  letter-spacing: 0.07em;
  color: var(--text-dim);
  text-transform: uppercase;
}
.kc-meta-dot { opacity: 0.3; }

/* ── LAYOUT ───────────────────────────────────────── */
.kc-layout {
  display: grid;
  grid-template-columns: 1fr 260px;
  gap: 3rem;
  max-width: 1100px;
  margin: 0 auto;
  padding: 3rem 2rem 5rem;
  align-items: start;
}

/* ── SIDEBAR / TOC ────────────────────────────────── */
.kc-sidebar {
  position: sticky;
  top: 80px;
}
.kc-toc {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 1.25rem 1.5rem;
}
.kc-toc-title {
  font-family: var(--font-mono);
  font-size: 0.58rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--gold);
  margin-bottom: 0.85rem;
  padding-bottom: 0.6rem;
  border-bottom: 1px solid var(--border);
}
.kc-toc ol {
  list-style: none;
  padding: 0; margin: 0;
  counter-reset: toc;
}
.kc-toc ol li { counter-increment: toc; margin-bottom: 0.1rem; }
.kc-toc ol li a {
  display: flex;
  align-items: baseline;
  gap: 0.5rem;
  font-size: 0.72rem;
  color: var(--text-dim);
  text-decoration: none;
  padding: 0.3rem 0;
  border-radius: var(--radius);
  transition: color 0.2s;
  line-height: 1.4;
}
.kc-toc ol li a::before {
  content: counter(toc, decimal-leading-zero);
  font-family: var(--font-mono);
  font-size: 0.55rem;
  color: var(--gold);
  opacity: 0.6;
  flex-shrink: 0;
}
.kc-toc ol li a:hover { color: var(--text); }
.kc-toc ol li a.active { color: var(--gold); }

.kc-cta-box {
  margin-top: 1.5rem;
  background: linear-gradient(135deg, rgba(30,90,168,0.15), rgba(243,156,18,0.08));
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 1.25rem;
  text-align: center;
}
.kc-cta-box p {
  font-size: 0.78rem;
  color: var(--text-muted);
  margin: 0 0 0.85rem;
  line-height: 1.5;
}
.kc-cta-box a {
  display: block;
  background: var(--gold);
  color: #070A14;
  font-family: var(--font-mono);
  font-size: 0.65rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  text-decoration: none;
  padding: 0.65rem 1rem;
  border-radius: var(--radius);
  transition: opacity 0.2s;
}
.kc-cta-box a:hover { opacity: 0.85; }

/* ── ARTICLE BODY ─────────────────────────────────── */
.kc-article {
  min-width: 0;
}
.kc-article h2 {
  font-family: var(--font-display);
  font-size: 1.6rem;
  color: var(--text);
  margin: 2.5rem 0 0.85rem;
  padding-top: 1rem;
  line-height: 1.2;
}
.kc-article h2:first-child { margin-top: 0; }
.kc-article h3 {
  font-size: 1rem;
  font-weight: 700;
  color: var(--text);
  margin: 1.75rem 0 0.6rem;
}
.kc-article p {
  font-size: 0.95rem;
  line-height: 1.8;
  color: var(--text-muted);
  margin: 0 0 1rem;
}
.kc-article ul, .kc-article ol {
  margin: 0.5rem 0 1rem 1.25rem;
  color: var(--text-muted);
}
.kc-article li {
  font-size: 0.92rem;
  line-height: 1.75;
  margin-bottom: 0.35rem;
}
.kc-article strong { color: var(--text); font-weight: 600; }

/* callout boxes */
.kc-callout {
  background: var(--surface);
  border-left: 3px solid var(--gold);
  border-radius: 0 var(--radius) var(--radius) 0;
  padding: 1rem 1.25rem;
  margin: 1.5rem 0;
}
.kc-callout.warning { border-color: #e74c3c; }
.kc-callout.tip    { border-color: #2ecc71; }
.kc-callout-label {
  font-family: var(--font-mono);
  font-size: 0.55rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--gold);
  margin-bottom: 0.4rem;
}
.kc-callout.warning .kc-callout-label { color: #e74c3c; }
.kc-callout.tip     .kc-callout-label { color: #2ecc71; }
.kc-callout p { margin: 0; font-size: 0.88rem; }

/* comparison table */
.kc-table-wrap { overflow-x: auto; margin: 1.5rem 0; }
.kc-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.85rem;
}
.kc-table th {
  background: var(--surface);
  color: var(--gold);
  font-family: var(--font-mono);
  font-size: 0.6rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  padding: 0.65rem 0.85rem;
  text-align: left;
  border-bottom: 1px solid var(--border);
}
.kc-table td {
  padding: 0.6rem 0.85rem;
  color: var(--text-muted);
  border-bottom: 1px solid rgba(255,255,255,0.04);
  vertical-align: top;
  line-height: 1.55;
}
.kc-table tr:last-child td { border-bottom: none; }

/* section divider */
.kc-section-rule {
  border: none;
  border-top: 1px solid var(--border);
  margin: 2.5rem 0;
}

/* ── RELATED ARTICLES ─────────────────────────────── */
.kc-related {
  background: var(--surface);
  border-top: 1px solid var(--border);
  padding: 3rem 2rem;
}
.kc-related-inner { max-width: 1100px; margin: 0 auto; }
.kc-related-title {
  font-family: var(--font-mono);
  font-size: 0.6rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--gold);
  margin-bottom: 1.5rem;
}
.kc-related-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.25rem;
}
.kc-related-card {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 1.25rem;
  text-decoration: none;
  transition: border-color 0.2s, transform 0.2s;
  display: block;
}
.kc-related-card:hover { border-color: var(--gold); transform: translateY(-2px); }
.kc-related-card-cat {
  font-family: var(--font-mono);
  font-size: 0.55rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--gold);
  margin-bottom: 0.5rem;
}
.kc-related-card h4 {
  font-size: 0.88rem;
  color: var(--text);
  margin: 0 0 0.35rem;
  line-height: 1.35;
}
.kc-related-card p {
  font-size: 0.75rem;
  color: var(--text-dim);
  margin: 0;
  line-height: 1.5;
}

/* ── ARTICLE FOOTER ───────────────────────────────── */
.kc-footer {
  background: var(--surface);
  border-top: 1px solid var(--border);
  padding: 2rem;
  text-align: center;
}
.kc-footer p {
  font-size: 0.78rem;
  color: var(--text-dim);
  margin: 0;
}
.kc-footer a { color: var(--gold); text-decoration: none; }

/* ── RESPONSIVE ───────────────────────────────────── */
@media (max-width: 860px) {
  .kc-layout {
    grid-template-columns: 1fr;
    padding: 2rem 1.25rem 4rem;
  }
  .kc-sidebar { position: static; }
  .kc-toc { display: none; }
  .kc-related-grid { grid-template-columns: 1fr; }
  .kc-hero { padding: 2.5rem 1.25rem 2rem; }
}