/* ============================================================================
   NXAI Knowledge Base — Blazor portal styles.
   Ported from the former static kb.css and scoped under `.kb-page` so the KB
   chrome/typography never leaks into the rest of the MudBlazor application.
   Light/dark aware (follows the OS colour scheme). Accessible & responsive.
   ========================================================================== */

.kb-page {
  --kb-bg: #f7f8fa;
  --kb-surface: #ffffff;
  --kb-surface-2: #f1f3f6;
  --kb-border: #e3e7ee;
  --kb-text: #1d2433;
  --kb-text-soft: #5a6577;
  --kb-text-faint: #8a93a6;
  --kb-primary: #1f8a4c;
  --kb-primary-strong: #14673a;
  --kb-primary-soft: #e7f5ec;
  --kb-accent: #0f6fde;
  --kb-warn-bg: #fff7e6;
  --kb-warn-border: #ffd591;
  --kb-warn-text: #8a5a00;
  --kb-tip-bg: #e7f5ec;
  --kb-tip-border: #9ad9b4;
  --kb-tip-text: #14673a;
  --kb-note-bg: #e9f1fe;
  --kb-note-border: #a9c8f5;
  --kb-note-text: #0b4ea2;
  --kb-code-bg: #f1f3f6;
  --kb-shadow: 0 1px 3px rgba(20, 28, 45, .08), 0 6px 18px rgba(20, 28, 45, .06);
  --kb-radius: 12px;
  --kb-header-h: 60px;
  --kb-sidebar-w: 290px;
  --kb-maxw: 1280px;
  --kb-font: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --kb-mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, "Liberation Mono", monospace;

  font-family: var(--kb-font);
  background: var(--kb-bg);
  color: var(--kb-text);
  line-height: 1.6;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
}

@media (prefers-color-scheme: dark) {
  .kb-page {
    --kb-bg: #0f141c;
    --kb-surface: #161c26;
    --kb-surface-2: #1d2531;
    --kb-border: #29333f;
    --kb-text: #e7ecf3;
    --kb-text-soft: #aab4c4;
    --kb-text-faint: #7f8a9c;
    --kb-primary: #34c97a;
    --kb-primary-strong: #5bd994;
    --kb-primary-soft: #14291f;
    --kb-accent: #5aa2ff;
    --kb-warn-bg: #2a2113;
    --kb-warn-border: #5c4a22;
    --kb-warn-text: #f0c66a;
    --kb-tip-bg: #14291f;
    --kb-tip-border: #2f5b41;
    --kb-tip-text: #6fe0a3;
    --kb-note-bg: #122236;
    --kb-note-border: #2c4a73;
    --kb-note-text: #8cb8f5;
    --kb-code-bg: #1d2531;
    --kb-shadow: 0 1px 3px rgba(0,0,0,.4), 0 6px 18px rgba(0,0,0,.35);
  }
}

.kb-page *, .kb-page *::before, .kb-page *::after { box-sizing: border-box; }

.kb-page a { color: var(--kb-accent); text-decoration: none; }
.kb-page a:hover { text-decoration: underline; }

.kb-page :focus-visible {
  outline: 3px solid var(--kb-accent);
  outline-offset: 2px;
  border-radius: 4px;
}

.kb-page code, .kb-page kbd {
  font-family: var(--kb-mono);
  font-size: .88em;
  background: var(--kb-code-bg);
  border: 1px solid var(--kb-border);
  border-radius: 6px;
  padding: .08em .4em;
}

.kb-page pre {
  background: var(--kb-code-bg);
  border: 1px solid var(--kb-border);
  border-radius: 10px;
  padding: 14px 16px;
  overflow-x: auto;
}
.kb-page pre code { background: none; border: none; padding: 0; }

/* ── Header ───────────────────────────────────────────────────────────────── */
.kb-header {
  position: sticky;
  top: 0;
  z-index: 50;
  height: var(--kb-header-h);
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 0 20px;
  background: var(--kb-surface);
  border-bottom: 1px solid var(--kb-border);
}
.kb-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  color: var(--kb-text);
  white-space: nowrap;
}
.kb-brand:hover { text-decoration: none; }
.kb-brand .kb-logo {
  width: 30px; height: 30px;
  display: grid; place-items: center;
  background: var(--kb-primary);
  color: #fff;
  border-radius: 8px;
  font-weight: 800;
}
.kb-brand small { color: var(--kb-text-faint); font-weight: 500; }

.kb-header-spacer { flex: 1; }

.kb-portal-link {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 7px 12px;
  border: 1px solid var(--kb-border);
  border-radius: 8px;
  color: var(--kb-text-soft);
  font-size: .9rem;
  white-space: nowrap;
}
.kb-portal-link:hover { background: var(--kb-surface-2); text-decoration: none; }

.kb-menu-btn {
  display: none;
  background: none; border: 1px solid var(--kb-border);
  border-radius: 8px; padding: 8px 10px; cursor: pointer;
  color: var(--kb-text); font-size: 1.1rem; line-height: 1;
}

/* ── Search ───────────────────────────────────────────────────────────────── */
.kb-search { position: relative; width: min(440px, 42vw); }
.kb-search input {
  width: 100%;
  padding: 9px 12px 9px 36px;
  border: 1px solid var(--kb-border);
  border-radius: 10px;
  background: var(--kb-surface-2) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%238a93a6' stroke-width='2' stroke-linecap='round'%3E%3Ccircle cx='11' cy='11' r='7'/%3E%3Cline x1='21' y1='21' x2='16.65' y2='16.65'/%3E%3C/svg%3E") no-repeat 12px center;
  color: var(--kb-text);
  font-size: .95rem;
}
.kb-search input:focus { outline: none; border-color: var(--kb-accent); background-color: var(--kb-surface); }

.kb-results {
  position: absolute;
  top: calc(100% + 8px);
  left: 0; right: 0;
  background: var(--kb-surface);
  border: 1px solid var(--kb-border);
  border-radius: 12px;
  box-shadow: var(--kb-shadow);
  max-height: 60vh;
  overflow-y: auto;
  display: none;
  padding: 6px;
  z-index: 60;
}
.kb-results.open { display: block; }
.kb-results .kb-result {
  display: block;
  padding: 9px 12px;
  border-radius: 8px;
  color: var(--kb-text);
}
.kb-results .kb-result:hover,
.kb-results .kb-result.active { background: var(--kb-primary-soft); text-decoration: none; }
.kb-results .kb-result .r-title { font-weight: 600; }
.kb-results .kb-result .r-cat { font-size: .78rem; color: var(--kb-text-faint); }
.kb-results .kb-result .r-sum { font-size: .85rem; color: var(--kb-text-soft); }
.kb-results .kb-empty { padding: 14px; color: var(--kb-text-faint); text-align: center; }

/* ── Shell layout ─────────────────────────────────────────────────────────── */
.kb-shell {
  display: grid;
  grid-template-columns: var(--kb-sidebar-w) minmax(0, 1fr);
  gap: 0;
  max-width: var(--kb-maxw);
  margin: 0 auto;
}

.kb-sidebar {
  position: sticky;
  top: var(--kb-header-h);
  align-self: start;
  height: calc(100vh - var(--kb-header-h));
  overflow-y: auto;
  padding: 22px 14px 60px 20px;
  border-right: 1px solid var(--kb-border);
}
.kb-sidebar h3 {
  font-size: .72rem;
  text-transform: uppercase;
  letter-spacing: .07em;
  color: var(--kb-text-faint);
  margin: 18px 0 6px;
  padding-left: 10px;
}
.kb-sidebar .kb-nav-cat:first-child h3 { margin-top: 0; }
.kb-sidebar a {
  display: block;
  padding: 7px 10px;
  border-radius: 8px;
  color: var(--kb-text-soft);
  font-size: .92rem;
}
.kb-sidebar a:hover { background: var(--kb-surface-2); color: var(--kb-text); text-decoration: none; }
.kb-sidebar a.active {
  background: var(--kb-primary-soft);
  color: var(--kb-primary-strong);
  font-weight: 600;
}

/* ── Main content ─────────────────────────────────────────────────────────── */
.kb-main { padding: 28px clamp(20px, 4vw, 56px) 80px; min-width: 0; }

.kb-breadcrumbs {
  font-size: .85rem;
  color: var(--kb-text-faint);
  margin-bottom: 18px;
}
.kb-breadcrumbs a { color: var(--kb-text-soft); }
.kb-breadcrumbs span { margin: 0 6px; }

.kb-article { max-width: 820px; }
.kb-article h1 {
  font-size: clamp(1.7rem, 1.2rem + 1.6vw, 2.3rem);
  line-height: 1.15;
  margin: 0 0 8px;
  letter-spacing: -.01em;
}
.kb-article .kb-lede {
  font-size: 1.12rem;
  color: var(--kb-text-soft);
  margin: 0 0 26px;
}
.kb-article h2 {
  font-size: 1.35rem;
  margin: 38px 0 12px;
  padding-top: 10px;
  border-top: 1px solid var(--kb-border);
}
.kb-article h2:first-of-type { border-top: none; padding-top: 0; }
.kb-article h3 { font-size: 1.08rem; margin: 24px 0 8px; }
.kb-article p { margin: 0 0 14px; }
.kb-article ul, .kb-article ol { margin: 0 0 16px; padding-left: 24px; }
.kb-article li { margin-bottom: 7px; }
.kb-article ol.kb-steps { counter-reset: step; list-style: none; padding-left: 0; }
.kb-article ol.kb-steps > li {
  counter-increment: step;
  position: relative;
  padding: 2px 0 14px 46px;
  margin: 0;
}
.kb-article ol.kb-steps > li::before {
  content: counter(step);
  position: absolute; left: 0; top: 0;
  width: 30px; height: 30px;
  display: grid; place-items: center;
  background: var(--kb-primary); color: #fff;
  border-radius: 50%; font-weight: 700; font-size: .9rem;
}
.kb-article ol.kb-steps > li:not(:last-child)::after {
  content: ""; position: absolute; left: 15px; top: 32px; bottom: 2px;
  width: 2px; background: var(--kb-border);
}

/* tables */
.kb-article table {
  width: 100%; border-collapse: collapse; margin: 6px 0 20px; font-size: .93rem;
}
.kb-article th, .kb-article td {
  text-align: left; padding: 10px 12px; border: 1px solid var(--kb-border); vertical-align: top;
}
.kb-article th { background: var(--kb-surface-2); font-weight: 600; }

/* admonitions / callouts */
.kb-callout {
  display: flex; gap: 12px;
  border: 1px solid var(--kb-border);
  border-left-width: 4px;
  border-radius: 10px;
  padding: 12px 16px;
  margin: 0 0 18px;
  background: var(--kb-surface);
}
.kb-callout .kb-callout-ico { font-size: 1.1rem; line-height: 1.5; }
.kb-callout p:last-child { margin-bottom: 0; }
.kb-callout.tip { background: var(--kb-tip-bg); border-color: var(--kb-tip-border); color: var(--kb-tip-text); }
.kb-callout.note { background: var(--kb-note-bg); border-color: var(--kb-note-border); color: var(--kb-note-text); }
.kb-callout.warn { background: var(--kb-warn-bg); border-color: var(--kb-warn-border); color: var(--kb-warn-text); }
.kb-callout strong { color: inherit; }

/* meta chips under H1 */
.kb-meta { display: flex; flex-wrap: wrap; gap: 8px; margin: 0 0 24px; }
.kb-chip {
  display: inline-flex; align-items: center; gap: 6px;
  font-size: .8rem; color: var(--kb-text-soft);
  background: var(--kb-surface-2); border: 1px solid var(--kb-border);
  border-radius: 999px; padding: 4px 11px;
}

/* related */
.kb-related { margin-top: 44px; border-top: 1px solid var(--kb-border); padding-top: 20px; }
.kb-related h2 { border: none; padding: 0; margin: 0 0 12px; font-size: 1.1rem; }
.kb-related-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(220px, 1fr)); gap: 12px; }
.kb-related-grid a {
  display: block; padding: 12px 14px;
  border: 1px solid var(--kb-border); border-radius: 10px;
  background: var(--kb-surface); color: var(--kb-text);
}
.kb-related-grid a:hover { border-color: var(--kb-primary); text-decoration: none; box-shadow: var(--kb-shadow); }
.kb-related-grid a .r-title { font-weight: 600; display: block; }
.kb-related-grid a .r-sum { font-size: .85rem; color: var(--kb-text-soft); }

/* ── Index / landing ──────────────────────────────────────────────────────── */
.kb-hero {
  max-width: var(--kb-maxw); margin: 0 auto; padding: 48px clamp(20px,5vw,56px) 8px;
  text-align: center;
}
.kb-hero h1 { font-size: clamp(2rem, 1.4rem + 2.4vw, 3rem); margin: 0 0 10px; letter-spacing: -.02em; }
.kb-hero p { font-size: 1.15rem; color: var(--kb-text-soft); margin: 0 auto 26px; max-width: 640px; }
.kb-hero .kb-search { width: min(620px, 92vw); margin: 0 auto; }
.kb-hero .kb-search input { padding: 13px 14px 13px 42px; font-size: 1.05rem; border-radius: 12px; }

.kb-cats {
  max-width: var(--kb-maxw); margin: 0 auto; padding: 30px clamp(20px,5vw,56px) 80px;
  display: grid; grid-template-columns: repeat(auto-fill, minmax(300px, 1fr)); gap: 18px;
}
.kb-cat-card {
  display: block; padding: 20px; border-radius: var(--kb-radius);
  background: var(--kb-surface); border: 1px solid var(--kb-border); color: var(--kb-text);
}
.kb-cat-card:hover { text-decoration: none; box-shadow: var(--kb-shadow); border-color: var(--kb-primary); transform: translateY(-2px); transition: .15s; }
.kb-cat-card .kb-cat-ico {
  width: 42px; height: 42px; border-radius: 10px; display: grid; place-items: center;
  background: var(--kb-primary-soft); color: var(--kb-primary-strong); font-size: 1.3rem; margin-bottom: 12px;
}
.kb-cat-card h2 { font-size: 1.12rem; margin: 0 0 4px; border: none; padding: 0; }
.kb-cat-card p { color: var(--kb-text-soft); font-size: .92rem; margin: 0 0 12px; }
.kb-cat-card ul { margin: 0; padding-left: 18px; }
.kb-cat-card li { font-size: .88rem; color: var(--kb-text-soft); margin-bottom: 3px; }
.kb-cat-card li a { color: var(--kb-text-soft); }

/* ── Footer ───────────────────────────────────────────────────────────────── */
.kb-footer {
  border-top: 1px solid var(--kb-border);
  padding: 22px 20px;
  text-align: center;
  color: var(--kb-text-faint);
  font-size: .86rem;
}
.kb-footer a { color: var(--kb-text-soft); margin: 0 8px; }

/* ── Sidebar backdrop (mobile) ────────────────────────────────────────────── */
.kb-backdrop { display: none; }

/* ── Responsive ───────────────────────────────────────────────────────────── */
@media (max-width: 900px) {
  .kb-menu-btn { display: inline-block; }
  .kb-search { width: 100%; }
  .kb-shell { grid-template-columns: 1fr; }
  .kb-sidebar {
    position: fixed; top: var(--kb-header-h); left: 0; bottom: 0;
    width: 84vw; max-width: 320px;
    height: calc(100vh - var(--kb-header-h));
    background: var(--kb-surface);
    transform: translateX(-102%);
    transition: transform .22s ease;
    z-index: 60;
  }
  .kb-page.kb-nav-open .kb-sidebar { transform: translateX(0); }
  .kb-page.kb-nav-open .kb-backdrop {
    display: block; position: fixed; inset: var(--kb-header-h) 0 0 0;
    background: rgba(10,14,20,.45); z-index: 55;
  }
}

@media print {
  .kb-header, .kb-sidebar, .kb-footer, .kb-related, .kb-portal-link, .kb-menu-btn { display: none !important; }
  .kb-shell { grid-template-columns: 1fr; }
  .kb-main { padding: 0; }
}