/* ═══════════════════════════════════════════════════════════════
   KNOWLEDGE MODULE — Isolated CSS Scope (prefix: .kn-)
   v156 — branched from v155
   Shared globally: header, footer, color tokens, typography base,
   buttons, .container. Everything else is .kn-* scoped.
   ═══════════════════════════════════════════════════════════════ */

/* ── Article page banner (compact, factual) ── */
.kn-page-banner{background:var(--green);color:#fff;padding:48px 0 40px;border-bottom:1px solid var(--green-dark)}
.kn-page-banner-i{max-width:1160px;margin:0 auto;padding:0 28px}
.kn-page-eyebrow{display:inline-block;font-size:11px;font-weight:600;color:var(--green-pale);letter-spacing:.14em;text-transform:uppercase;border:1px solid rgba(255,255,255,.25);padding:4px 12px;border-radius:4px;margin-bottom:14px}
.kn-page-title{font-size:28px;font-weight:600;color:#fff;line-height:1.3;margin:0 0 10px;letter-spacing:-.01em;max-width:820px}
.kn-page-lede{font-size:14px;color:var(--green-pale);line-height:1.65;margin:0;max-width:720px}

/* ── Breadcrumbs ── */
.kn-crumbs{background:var(--bg-s);border-bottom:1px solid var(--border);padding:12px 0;font-size:12.5px;color:var(--muted)}
.kn-crumbs-i{max-width:1160px;margin:0 auto;padding:0 28px}
.kn-crumbs a{color:var(--muted);text-decoration:none}
.kn-crumbs a:hover{color:var(--green);text-decoration:underline}
.kn-crumbs-sep{margin:0 8px;color:var(--hint)}
.kn-crumbs-cur{color:var(--text)}

/* ── Hub (index) — article list ── */
.kn-hub{padding:48px 0 64px;background:#fff}
.kn-hub-i{max-width:1160px;margin:0 auto;padding:0 28px}
.kn-hub-meta{font-size:12px;color:var(--hint);text-transform:uppercase;letter-spacing:.1em;margin-bottom:18px}
.kn-list{display:grid;grid-template-columns:1fr 1fr;gap:20px}
.kn-card{display:flex;flex-direction:column;background:#fff;border:1px solid var(--border);border-radius:var(--r-md);overflow:hidden;text-decoration:none;color:inherit;transition:border-color .2s,transform .15s,box-shadow .2s}
.kn-card:hover{border-color:var(--green-pale);transform:translateY(-2px);box-shadow:0 6px 16px rgba(20,40,28,.06)}
.kn-card-img{width:100%;aspect-ratio:16/9;object-fit:cover;background:var(--bg-s);display:block}
.kn-card-body{padding:18px 20px 20px;flex:1;display:flex;flex-direction:column}
.kn-card-tag{font-size:10.5px;font-weight:600;color:var(--green);letter-spacing:.1em;text-transform:uppercase;margin-bottom:8px}
.kn-card-title{font-size:16px;font-weight:600;color:var(--text);line-height:1.4;margin:0 0 8px}
.kn-card-desc{font-size:13.5px;color:var(--muted);line-height:1.65;margin:0 0 14px;flex:1}
.kn-card-meta{font-size:12px;color:var(--hint);display:flex;align-items:center;gap:10px}
.kn-card-meta-sep{color:var(--hint)}

/* ── Article layout (single page) ── */
.kn-article{padding:40px 0 56px;background:#fff}
.kn-article-i{max-width:1160px;margin:0 auto;padding:0 28px;display:grid;grid-template-columns:minmax(0,1fr) 280px;gap:48px;align-items:start}
.kn-main{min-width:0}
.kn-hero-img{width:100%;aspect-ratio:16/8;object-fit:cover;background:var(--bg-s);border-radius:var(--r-md);margin-bottom:28px;display:block;border:1px solid var(--border)}
.kn-meta{font-size:12.5px;color:var(--muted);margin-bottom:24px;display:flex;align-items:center;gap:10px;flex-wrap:wrap}
.kn-meta-tag{font-size:10.5px;font-weight:600;color:var(--green);letter-spacing:.1em;text-transform:uppercase;background:var(--green-bg);padding:3px 10px;border-radius:4px}
.kn-meta-sep{color:var(--hint)}

.kn-prose{font-size:15px;line-height:1.78;color:var(--text);max-width:760px}
.kn-prose > h2{font-size:22px;font-weight:600;color:var(--text);line-height:1.35;margin:40px 0 14px;letter-spacing:-.005em;padding-bottom:6px;border-bottom:1px solid var(--border)}
.kn-prose > h3{font-size:17px;font-weight:600;color:var(--text);line-height:1.4;margin:28px 0 10px}
.kn-prose > p{margin:0 0 16px}
.kn-prose > ul,.kn-prose > ol{margin:0 0 18px;padding-left:22px}
.kn-prose > ul li,.kn-prose > ol li{margin-bottom:6px;line-height:1.7}
.kn-prose strong{color:var(--text);font-weight:600}
.kn-prose a{color:var(--green);text-decoration:underline;text-decoration-color:var(--green-pale);text-underline-offset:3px}
.kn-prose a:hover{text-decoration-color:var(--green)}
.kn-prose blockquote{border-left:3px solid var(--green);background:var(--bg-s);padding:14px 18px;margin:18px 0;font-size:14.5px;color:var(--muted);line-height:1.7}
.kn-prose code{background:var(--bg-s);padding:2px 6px;border-radius:4px;font-size:.92em;font-family:'SF Mono',Consolas,Monaco,monospace;color:var(--text)}

.kn-spec{width:100%;border-collapse:collapse;margin:18px 0 22px;font-size:13.5px;background:#fff;border:1px solid var(--border);border-radius:var(--r-md);overflow:hidden}
.kn-spec th{background:var(--bg-s);text-align:left;padding:10px 14px;font-weight:600;color:var(--text);border-bottom:1px solid var(--border);font-size:12.5px;text-transform:uppercase;letter-spacing:.04em}
.kn-spec td{padding:10px 14px;border-bottom:1px solid var(--border);color:var(--text);line-height:1.55}
.kn-spec tr:last-child td{border-bottom:none}
.kn-spec td:first-child{font-weight:500;color:var(--muted);width:38%}

.kn-fig{margin:20px 0 24px}
.kn-fig img{width:100%;aspect-ratio:16/9;object-fit:cover;border-radius:var(--r-md);border:1px solid var(--border);display:block}
.kn-fig-cap{font-size:12.5px;color:var(--muted);margin-top:8px;text-align:left;line-height:1.55;font-style:normal}

.kn-callout{background:var(--bg-s);border:1px solid var(--border);border-left:3px solid var(--green);border-radius:var(--r-sm);padding:14px 16px;margin:18px 0;font-size:13.5px;line-height:1.7;color:var(--text)}
.kn-callout-t{font-weight:600;color:var(--text);margin-bottom:4px;font-size:13px}

/* Operational placeholder marker — anh review trước khi deploy */
.kn-needs{display:inline-block;background:#fff4d6;color:#7a5800;border:1px dashed #d4a200;padding:1px 8px;border-radius:4px;font-size:.92em;font-weight:500;font-style:normal;white-space:nowrap}
.kn-prose p .kn-needs,.kn-prose li .kn-needs,.kn-spec td .kn-needs{font-family:'SF Mono',Consolas,Monaco,monospace;font-size:.86em}

.kn-side{position:sticky;top:80px;align-self:start}
.kn-side-box{background:#fff;border:1px solid var(--border);border-radius:var(--r-md);padding:18px 20px;margin-bottom:18px}
.kn-side-t{font-size:11px;font-weight:600;color:var(--hint);text-transform:uppercase;letter-spacing:.1em;margin-bottom:12px}
.kn-toc{list-style:none;padding:0;margin:0}
.kn-toc li{margin:0 0 6px}
.kn-toc a{font-size:13px;color:var(--muted);text-decoration:none;line-height:1.5;display:block;padding:4px 0;border-left:2px solid transparent;padding-left:10px;margin-left:-12px;transition:border-color .15s,color .15s}
.kn-toc a:hover{color:var(--green);border-left-color:var(--green-pale)}
.kn-side-cta{background:var(--green);color:#fff;border-radius:var(--r-md);padding:20px;text-align:left}
.kn-side-cta-t{font-size:14.5px;font-weight:600;color:#fff;margin-bottom:6px;line-height:1.4}
.kn-side-cta-d{font-size:12.5px;color:var(--green-pale);margin-bottom:14px;line-height:1.6}
.kn-side-cta a{display:inline-flex;align-items:center;justify-content:center;width:100%;background:#fff;color:var(--green);font-size:13px;font-weight:600;padding:10px 14px;border-radius:6px;text-decoration:none;transition:opacity .15s}
.kn-side-cta a:hover{opacity:.92}

.kn-related li{margin:0 0 10px}
.kn-related a{font-size:13px;color:var(--text);text-decoration:none;line-height:1.5;display:block}
.kn-related a:hover{color:var(--green)}
.kn-related-meta{font-size:11px;color:var(--hint);margin-top:2px}

.kn-end{margin-top:42px;padding-top:24px;border-top:1px solid var(--border)}
.kn-end-cta{background:var(--bg-s);border:1px solid var(--border);border-radius:var(--r-md);padding:24px;display:flex;justify-content:space-between;align-items:center;gap:20px;flex-wrap:wrap}
.kn-end-cta-l{flex:1;min-width:240px}
.kn-end-cta-t{font-size:16px;font-weight:600;color:var(--text);margin:0 0 4px;line-height:1.4}
.kn-end-cta-d{font-size:13px;color:var(--muted);margin:0;line-height:1.6}
.kn-end-acts{display:flex;gap:10px;flex-shrink:0}

@media(max-width:980px){
  .kn-article-i{grid-template-columns:1fr;gap:32px}
  .kn-side{position:static}
  .kn-list{grid-template-columns:1fr 1fr}
}
@media(max-width:700px){
  .kn-page-banner{padding:36px 0 32px}
  .kn-page-title{font-size:22px}
  .kn-page-lede{font-size:13.5px}
  .kn-article-i,.kn-hub-i,.kn-page-banner-i,.kn-crumbs-i{padding:0 20px}
  .kn-article{padding:28px 0 40px}
  .kn-hub{padding:32px 0 48px}
  .kn-list{grid-template-columns:1fr;gap:14px}
  .kn-card-body{padding:16px 18px 18px}
  .kn-prose{font-size:14.5px}
  .kn-prose > h2{font-size:19px;margin:32px 0 12px}
  .kn-prose > h3{font-size:16px}
  .kn-spec{font-size:12.5px}
  .kn-spec th,.kn-spec td{padding:8px 10px}
  .kn-end-cta{padding:20px;flex-direction:column;align-items:stretch}
  .kn-end-acts{width:100%}
  .kn-end-acts .btn{flex:1}
}