/* Knowledge Center - dedicated stylesheet for the server-rendered pages in
   app/templates/knowledge/. Deliberately self-contained (system fonts only,
   no external font/CDN calls) so it never depends on the frontend's build
   output or needs any CSP allowance beyond 'self'. Hand-matched to
   AskLaala's brand colors, not copy-pasted from the frontend's Tailwind
   config, since the two are separate deploys that should stay decoupled. */

:root {
  --navy: #0f172a;
  --slate-950: #020617;
  --slate-900: #0f172a;
  --slate-800: #1e293b;
  --gray-900: #111827;
  --gray-800: #1f2937;
  --blue: #2563eb;
  --blue-dark: #1d4ed8;
  --blue-light: #60a5fa;
  --bg: #f8fafc;
  --card: #ffffff;
  --text: #1e293b;
  --muted: #64748b;
  --border: #e2e8f0;
  --radius: 14px;
}

* { box-sizing: border-box; }

html, body { height: 100%; }

body {
  margin: 0;
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  line-height: 1.6;
}

.kc-main { flex: 1 0 auto; }

a { color: var(--blue); text-decoration: none; }
a:hover { text-decoration: underline; }
a:focus-visible, button:focus-visible, summary:focus-visible { outline: 2px solid var(--blue); outline-offset: 2px; }

.kc-brand { color: #fff; font-weight: 700; font-size: 1.15rem; text-decoration: none; }
.kc-brand span { color: var(--blue-light); }

/* --- Header (mirrors Navbar.jsx: fixed-dark, sticky, same link set) --- */
.kc-header {
  background: var(--slate-950);
  border-bottom: 1px solid var(--slate-800);
  position: sticky;
  top: 0;
  z-index: 50;
}
.kc-header-inner {
  max-width: 1280px;
  margin: 0 auto;
  padding: 16px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.kc-header-nav {
  display: flex;
  align-items: center;
  gap: 24px;
  font-size: 0.95rem;
  font-weight: 500;
}
.kc-header-nav > a { color: #cbd5e1; text-decoration: none; }
.kc-header-nav > a:hover { color: #fff; }

.kc-calc-dropdown { position: relative; }
.kc-calc-dropdown summary {
  color: #cbd5e1;
  cursor: pointer;
  list-style: none;
}
.kc-calc-dropdown summary::-webkit-details-marker { display: none; }
.kc-calc-dropdown summary:hover { color: #fff; }
.kc-calc-dropdown summary::after { content: " \25BE"; font-size: 0.8em; }
.kc-calc-menu {
  position: absolute;
  top: calc(100% + 10px);
  left: 0;
  background: var(--slate-900);
  border: 1px solid var(--slate-800);
  border-radius: 12px;
  padding: 8px;
  min-width: 240px;
  box-shadow: 0 10px 30px rgba(0,0,0,0.35);
  display: flex;
  flex-direction: column;
}
.kc-calc-menu a {
  color: #e2e8f0;
  padding: 9px 12px;
  border-radius: 8px;
  font-size: 0.9rem;
  text-decoration: none;
}
.kc-calc-menu a:hover { background: var(--slate-800); }
.kc-calc-menu-all {
  margin-top: 4px;
  border-top: 1px solid var(--slate-800);
  padding-top: 10px !important;
  color: var(--blue-light) !important;
  font-weight: 600;
}

.kc-header-login {
  color: var(--slate-950);
  background: #fff;
  padding: 8px 16px;
  border-radius: 8px;
  font-size: 0.9rem;
  font-weight: 500;
  text-decoration: none;
  white-space: nowrap;
}
.kc-header-login:hover { background: #f1f5f9; text-decoration: none; }

@media (max-width: 720px) {
  .kc-header-inner { flex-wrap: wrap; gap: 12px 20px; }
  .kc-header-nav { order: 3; flex-basis: 100%; flex-wrap: wrap; gap: 14px; }
}

.kc-container {
  max-width: 880px;
  margin: 0 auto;
  padding: 32px 20px 80px;
}

.kc-hero h1 {
  font-size: 1.9rem;
  margin: 0 0 8px;
}
.kc-hero p.lead {
  color: var(--muted);
  font-size: 1.05rem;
  margin: 0 0 24px;
}

.kc-search {
  display: flex;
  gap: 8px;
  margin-bottom: 28px;
}
.kc-search input[type="text"] {
  flex: 1;
  padding: 12px 16px;
  border: 1px solid var(--border);
  border-radius: 10px;
  font-size: 1rem;
}
.kc-search button {
  padding: 12px 20px;
  background: var(--blue);
  color: #fff;
  border: none;
  border-radius: 10px;
  font-weight: 600;
  cursor: pointer;
}
.kc-search button:hover { background: var(--blue-dark); }

.kc-pillars {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 32px;
}
.kc-pillar-chip {
  padding: 8px 14px;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: var(--card);
  font-size: 0.88rem;
  color: var(--text);
}
.kc-pillar-chip.active {
  background: var(--blue);
  border-color: var(--blue);
  color: #fff;
}

.kc-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 18px;
}
.kc-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.kc-card .kc-tag {
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.03em;
  color: var(--blue);
  font-weight: 700;
}
.kc-card h3 { margin: 0; font-size: 1.05rem; }
.kc-card p { margin: 0; color: var(--muted); font-size: 0.92rem; }
.kc-card .kc-verified { font-size: 0.78rem; color: var(--muted); margin-top: auto; }

.kc-empty {
  text-align: center;
  color: var(--muted);
  padding: 60px 20px;
}

.kc-type-filter {
  display: flex;
  gap: 8px;
  margin-bottom: 16px;
}
.kc-type-chip {
  padding: 6px 16px;
  border-radius: 999px;
  border: 1px solid var(--navy);
  background: transparent;
  color: var(--navy);
  font-size: 0.85rem;
  font-weight: 600;
}
.kc-type-chip.active { background: var(--navy); color: #fff; }

.kc-section-heading { font-size: 1.1rem; margin: 8px 0 16px; }

.kc-glossary-list {
  list-style: none;
  margin: 0;
  padding: 0;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--card);
}
.kc-glossary-list li {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 14px 18px;
  border-bottom: 1px solid var(--border);
}
.kc-glossary-list li:last-child { border-bottom: none; }
.kc-glossary-list a {
  display: flex;
  flex-direction: column;
  gap: 2px;
  flex: 1;
  min-width: 0;
  color: var(--text);
  text-decoration: none;
}
.kc-glossary-list a:hover .kc-glossary-term { text-decoration: underline; }
.kc-glossary-term { font-weight: 700; font-size: 0.98rem; }
.kc-glossary-def {
  font-size: 0.88rem;
  color: var(--muted);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.kc-glossary-list .kc-tag {
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.03em;
  color: var(--blue);
  font-weight: 700;
  white-space: nowrap;
}

@media (max-width: 640px) {
  .kc-glossary-list a { min-width: 0; }
  .kc-glossary-def { display: none; }
}

/* --- Article page --- */
.kc-breadcrumb { font-size: 0.9rem; color: var(--muted); margin-bottom: 12px; }
.kc-glossary-badge {
  display: inline-block;
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  color: #fff;
  background: var(--blue);
  border-radius: 6px;
  padding: 3px 9px;
  margin-bottom: 10px;
}
.kc-article h1 { font-size: 2rem; margin: 0 0 6px; }
.kc-verified-badge {
  display: inline-block;
  font-size: 0.82rem;
  color: var(--muted);
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 4px 12px;
  margin-bottom: 20px;
}
.kc-tldr {
  background: #eff6ff;
  border: 1px solid #bfdbfe;
  border-radius: var(--radius);
  padding: 18px 20px;
  margin-bottom: 28px;
}
.kc-tldr .kc-tldr-label {
  font-size: 0.78rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--blue-dark);
  display: block;
  margin-bottom: 6px;
}
.kc-body h2 { margin-top: 2em; font-size: 1.35rem; }
.kc-body h3 { font-size: 1.1rem; }
.kc-body ul, .kc-body ol { padding-left: 1.4em; }
.kc-body code { background: #f1f5f9; padding: 2px 6px; border-radius: 4px; font-size: 0.9em; }

.kc-related { margin-top: 32px; }
.kc-related-label {
  display: block;
  font-size: 0.78rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--muted);
  margin-bottom: 10px;
}
.kc-related-links { display: flex; flex-wrap: wrap; gap: 8px; }
.kc-related-links a {
  padding: 7px 14px;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: var(--card);
  font-size: 0.88rem;
}
.kc-related-links a:hover { background: #eff6ff; text-decoration: none; }

.kc-cta {
  margin-top: 40px;
  padding: 24px;
  background: var(--navy);
  border-radius: var(--radius);
  color: #fff;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}
.kc-cta p { margin: 0; font-size: 1rem; }
.kc-cta .kc-cta-buttons { display: flex; gap: 10px; flex-wrap: wrap; }
.kc-cta a.kc-btn {
  background: var(--blue);
  color: #fff;
  padding: 10px 18px;
  border-radius: 8px;
  font-weight: 600;
  font-size: 0.92rem;
}
.kc-cta a.kc-btn:hover { background: var(--blue-dark); text-decoration: none; }
.kc-cta a.kc-btn.secondary { background: rgba(255,255,255,0.12); }

.kc-back-link { display: inline-block; margin-top: 32px; font-size: 0.92rem; }

/* --- Footer (mirrors Footer.jsx: 4-column grid, disclaimer, bottom bar) --- */
.kc-footer {
  background: var(--gray-900);
  color: #fff;
  margin-top: 48px;
  padding: 48px 24px 32px;
}
.kc-footer-inner { max-width: 1280px; margin: 0 auto; }
.kc-footer-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 40px;
  padding-bottom: 40px;
  border-bottom: 1px solid var(--gray-800);
}
.kc-footer-brand .kc-footer-tagline {
  color: #9ca3af;
  font-size: 0.9rem;
  line-height: 1.6;
  max-width: 300px;
  margin: 12px 0 16px;
}
.kc-footer-brand .kc-footer-address {
  color: #6b7280;
  font-size: 0.78rem;
  line-height: 1.6;
  max-width: 300px;
}
.kc-footer-brand .kc-footer-address a { color: #6b7280; }
.kc-footer-brand .kc-footer-address a:hover { color: #fff; }
.kc-footer-col h3 {
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: #9ca3af;
  margin: 0 0 16px;
}
.kc-footer-col ul { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 10px; }
.kc-footer-col a { color: #d1d5db; font-size: 0.9rem; }
.kc-footer-col a:hover { color: #fff; }
.kc-footer-disclaimer {
  padding-top: 24px;
  max-width: 900px;
  color: #6b7280;
  font-size: 0.78rem;
  line-height: 1.6;
}
.kc-footer-bottom {
  padding-top: 24px;
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
}
.kc-footer-bottom p { margin: 0; }
.kc-footer-bottom p:first-child { color: #9ca3af; font-size: 0.9rem; }
.kc-footer-bottom p:last-child { color: #6b7280; font-size: 0.78rem; }

@media (max-width: 900px) {
  .kc-footer-grid { grid-template-columns: repeat(2, 1fr); gap: 32px; }
}
@media (max-width: 540px) {
  .kc-footer-grid { grid-template-columns: 1fr; }
}