/* ThinkChat v2 — Knowledge hub (/knowledge) and articles (/knowledge/{slug}).
   Tokens, buttons, nav and footer come from v2.css. Everything here is prefixed kn- so it never
   collides with v2.css / v2-doc.css. */

.kn-page {
  position: relative;
  isolation: isolate;
  overflow: clip;
  padding: clamp(36px, 5vw, 64px) 0 clamp(64px, 8vw, 100px);
}
.kn-page > .orb-peach { width: 420px; height: 420px; left: -180px; top: 20px; }
.kn-page > .orb-lavender { width: 480px; height: 480px; right: -200px; top: -140px; }

/* ---------- Hero ---------- */

.kn-hero { max-width: 720px; margin-bottom: clamp(24px, 3vw, 36px); }
.kn-eyebrow {
  display: inline-block;
  margin: 0 0 14px;
  padding: 6px 12px;
  border-radius: var(--r-pill);
  background: var(--peach);
  color: var(--coral-ink);
  font-size: 12px;
  font-weight: 800;
  letter-spacing: .08em;
  text-transform: uppercase;
}
.kn-hero h1 {
  margin: 0 0 12px;
  font-size: clamp(32px, 5vw, 54px);
  line-height: 1.04;
  letter-spacing: -.05em;
}
.kn-hero .lead { max-width: 36rem; }

/* ---------- Two-column layout: list + right stack ---------- */

.kn-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 280px;
  gap: 40px;
  align-items: start;
}
.kn-main { min-width: 0; max-width: 760px; }

/* ---------- Topic chips ---------- */

.kn-chips { display: flex; flex-wrap: wrap; gap: 8px; margin: 0 0 8px; }
.kn-chip {
  padding: 8px 14px;
  border: 1px solid var(--line);
  border-radius: var(--r-pill);
  background: var(--paper);
  color: var(--aubergine);
  font-size: 13px;
  font-weight: 700;
  line-height: 1.2;
  transition: border-color .2s, color .2s, background .2s;
}
.kn-chip:hover { border-color: var(--coral); color: var(--coral-ink); }
.kn-chip[aria-current="true"] { background: var(--aubergine); border-color: var(--aubergine); color: #fff; }

/* ---------- Article list ---------- */

.kn-list { margin-top: 16px; border-top: 1px solid var(--line); }
.kn-post { padding: 26px 0; border-bottom: 1px solid var(--line); }
.kn-post[hidden], .kn-empty[hidden] { display: none; }

.kn-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px 12px;
  margin-bottom: 8px;
  color: var(--muted);
  font-size: 12px;
  font-weight: 700;
}
.kn-pill {
  padding: 3px 9px;
  border-radius: var(--r-pill);
  background: var(--peach);
  color: var(--coral-ink);
  font-size: 11px;
  font-weight: 800;
  letter-spacing: .02em;
  text-transform: uppercase;
}

.kn-post h2 { margin: 0 0 8px; font-size: 22px; line-height: 1.3; letter-spacing: -.03em; }
.kn-post h2 a { transition: color .2s; }
.kn-post h2 a:hover { color: var(--coral-ink); }
.kn-excerpt { max-width: 40rem; color: var(--muted); font-size: 15px; line-height: 1.6; }
.kn-more { display: inline-block; margin-top: 12px; color: var(--coral-ink); font-size: 13px; font-weight: 800; }
.kn-more:hover { color: var(--coral-dark); }
.kn-empty { padding: 26px 0; color: var(--muted); font-size: 15px; }

/* ---------- Right stack ---------- */

.kn-aside {
  position: sticky;
  top: calc(var(--nav-h) + 24px);
  display: flex;
  flex-direction: column;
  gap: 18px;
}
.kn-card {
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  background: var(--paper);
}
.kn-card-title {
  margin: 0 0 12px;
  color: var(--muted);
  font-size: 12px;
  font-weight: 800;
  letter-spacing: .08em;
  line-height: 1.3;
  text-transform: uppercase;
}

.kn-card-hire { background: var(--aubergine-deep); border-color: var(--aubergine-deep); color: #fff; }
.kn-card-hire strong { display: block; margin-bottom: 6px; font-size: 15px; line-height: 1.35; letter-spacing: -.02em; }
.kn-card-hire p { margin: 0 0 14px; color: rgba(255, 255, 255, .72); font-size: 12.5px; line-height: 1.45; }
.kn-card-hire p span { white-space: nowrap; }
.kn-card-hire .btn { width: 100%; box-shadow: none; }

.kn-popular { display: flex; flex-direction: column; gap: 10px; margin: 0; padding: 0; list-style: none; }
.kn-popular li { font-size: 13px; font-weight: 600; line-height: 1.4; }
.kn-popular a { transition: color .2s; }
.kn-popular a:hover { color: var(--coral-ink); }

.kn-topic-links { display: flex; flex-wrap: wrap; gap: 6px; }
.kn-topic-links a {
  padding: 6px 10px;
  border: 1px solid var(--line);
  border-radius: var(--r-pill);
  background: var(--ivory);
  font-size: 12px;
  font-weight: 700;
  line-height: 1.2;
  transition: border-color .2s, color .2s;
}
.kn-topic-links a:hover { border-color: var(--coral); color: var(--coral-ink); }

/* ---------- Single article (optional page) ---------- */

.kn-article { min-width: 0; max-width: 720px; }
.kn-crumbs { margin-bottom: 14px; color: var(--muted); font-size: 13px; font-weight: 700; }
.kn-crumbs a:hover { color: var(--coral-ink); }
.kn-article h1 { margin: 0 0 14px; font-size: clamp(30px, 4.4vw, 46px); line-height: 1.08; letter-spacing: -.045em; }
.kn-body { margin-top: 24px; padding-top: 24px; border-top: 1px solid var(--line); }
.kn-body p, .kn-body li { font-size: 16px; line-height: 1.75; }
.kn-body p { margin: 0 0 16px; }
.kn-body h2 { margin: 32px 0 12px; font-size: 24px; line-height: 1.25; letter-spacing: -.035em; }
.kn-body h3 { margin: 24px 0 10px; font-size: 19px; line-height: 1.3; letter-spacing: -.03em; }
.kn-body a { color: var(--violet); font-weight: 700; text-decoration: underline; text-underline-offset: 3px; }
.kn-body ul, .kn-body ol { margin: 0 0 18px; padding-left: 22px; }
.kn-back { margin-top: 28px; }

/* ---------- Responsive ---------- */

@media (max-width: 900px) {
  .kn-layout { grid-template-columns: 1fr; gap: 28px; }
  .kn-main, .kn-article { max-width: none; }
  .kn-aside { position: static; }
}

@media (max-width: 560px) {
  .kn-post h2 { font-size: 19px; }
  .kn-chips { flex-wrap: nowrap; overflow-x: auto; margin-inline: -16px; padding: 0 16px 6px; scrollbar-width: none; }
  .kn-chips::-webkit-scrollbar { display: none; }
  .kn-chip { flex: none; }
}

@media print {
  .kn-aside, .kn-chips, .orb { display: none; }
  .kn-layout { display: block; }
}