/* ============================================================================
   NXAI Knowledge Base — Blazor portal styles.
   Scoped under `.kb-page` so the KB chrome/typography never leaks into the rest
   of the MudBlazor application.

   Theming: aligned to the app's teal brand (Primary #0F766E / Secondary #14B8A6).
   Dark mode is driven by an explicit class set by KbLayout from the app's shared
   `ui.theme.darkmode` preference:
     • `.kb-theme-dark`  → forced dark      • `.kb-theme-light` → forced light
   `prefers-color-scheme: dark` is only a pre-JS fallback (before the stored
   preference is read), and never overrides an explicit `.kb-theme-light`.
   Accessible & responsive.
   ========================================================================== */

.kb-page {
  /* ── Light tokens (default) ─────────────────────────────────────────────── */
  --kb-bg: #f8fafc;
  --kb-surface: #ffffff;
  --kb-surface-2: #f1f5f9;
  --kb-surface-3: #e9eef4;
  --kb-border: #e2e8f0;
  --kb-border-strong: #cbd5e1;
  --kb-text: #0f172a;
  --kb-text-soft: #475569;
  --kb-text-faint: #94a3b8;
  --kb-primary: #0f766e;
  --kb-primary-strong: #0b5a54;
  --kb-primary-contrast: #ffffff;
  --kb-primary-soft: #e3f3f0;
  --kb-accent: #0ea5e9;
  --kb-ring: rgba(15, 118, 110, .32);

  --kb-hero-glow-1: rgba(20, 184, 166, .20);
  --kb-hero-glow-2: rgba(14, 165, 233, .12);

  --kb-warn-bg: #fff7ed;  --kb-warn-border: #fdba74;  --kb-warn-text: #9a3412;
  --kb-tip-bg: #ecfdf5;   --kb-tip-border: #6ee7b7;   --kb-tip-text: #065f46;
  --kb-note-bg: #eff6ff;  --kb-note-border: #93c5fd;  --kb-note-text: #1e40af;
  --kb-code-bg: #f1f5f9;

  --kb-shadow-sm: 0 1px 2px rgba(15, 23, 42, .06);
  --kb-shadow: 0 1px 3px rgba(15, 23, 42, .08), 0 10px 24px rgba(15, 23, 42, .06);
  --kb-shadow-lg: 0 14px 44px rgba(15, 23, 42, .14);

  --kb-radius: 14px;
  --kb-radius-sm: 10px;
  --kb-header-h: 64px;
  --kb-sidebar-w: 288px;
  --kb-maxw: 1280px;
  --kb-font: "Montserrat", -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;
  text-rendering: optimizeLegibility;
  scroll-behavior: smooth;
}

/* ── Dark tokens ──────────────────────────────────────────────────────────── */
/* Pre-JS fallback: follow the OS unless the page is explicitly forced to light. */
@media (prefers-color-scheme: dark) {
  .kb-page:not(.kb-theme-light) {
    --kb-bg: #012b36;
    --kb-surface: #06333f;
    --kb-surface-2: #0a404d;
    --kb-surface-3: #0e4a58;
    --kb-border: #134854;
    --kb-border-strong: #1c5d6b;
    --kb-text: #ecf3f4;
    --kb-text-soft: #a7c0c6;
    --kb-text-faint: #6e8a92;
    --kb-primary: #2dd4bf;
    --kb-primary-strong: #5eead4;
    --kb-primary-contrast: #04241c;
    --kb-primary-soft: rgba(45, 212, 191, .14);
    --kb-accent: #38bdf8;
    --kb-ring: rgba(45, 212, 191, .45);
    --kb-hero-glow-1: rgba(20, 184, 166, .22);
    --kb-hero-glow-2: rgba(56, 189, 248, .14);
    --kb-warn-bg: #2a1e12;  --kb-warn-border: #7c4a1e;  --kb-warn-text: #f5c079;
    --kb-tip-bg: rgba(45, 212, 191, .10);  --kb-tip-border: #2c6b5c;  --kb-tip-text: #6fe7ce;
    --kb-note-bg: rgba(56, 189, 248, .10); --kb-note-border: #28596e; --kb-note-text: #8fd1f2;
    --kb-code-bg: #0a404d;
    --kb-shadow-sm: 0 1px 2px rgba(0, 0, 0, .4);
    --kb-shadow: 0 1px 3px rgba(0, 0, 0, .45), 0 10px 24px rgba(0, 0, 0, .4);
    --kb-shadow-lg: 0 16px 48px rgba(0, 0, 0, .5);
  }
}
/* Explicit dark (set by the theme toggle / stored preference). */
.kb-page.kb-theme-dark {
  --kb-bg: #012b36;
  --kb-surface: #06333f;
  --kb-surface-2: #0a404d;
  --kb-surface-3: #0e4a58;
  --kb-border: #134854;
  --kb-border-strong: #1c5d6b;
  --kb-text: #ecf3f4;
  --kb-text-soft: #a7c0c6;
  --kb-text-faint: #6e8a92;
  --kb-primary: #2dd4bf;
  --kb-primary-strong: #5eead4;
  --kb-primary-contrast: #04241c;
  --kb-primary-soft: rgba(45, 212, 191, .14);
  --kb-accent: #38bdf8;
  --kb-ring: rgba(45, 212, 191, .45);
  --kb-hero-glow-1: rgba(20, 184, 166, .22);
  --kb-hero-glow-2: rgba(56, 189, 248, .14);
  --kb-warn-bg: #2a1e12;  --kb-warn-border: #7c4a1e;  --kb-warn-text: #f5c079;
  --kb-tip-bg: rgba(45, 212, 191, .10);  --kb-tip-border: #2c6b5c;  --kb-tip-text: #6fe7ce;
  --kb-note-bg: rgba(56, 189, 248, .10); --kb-note-border: #28596e; --kb-note-text: #8fd1f2;
  --kb-code-bg: #0a404d;
  --kb-shadow-sm: 0 1px 2px rgba(0, 0, 0, .4);
  --kb-shadow: 0 1px 3px rgba(0, 0, 0, .45), 0 10px 24px rgba(0, 0, 0, .4);
  --kb-shadow-lg: 0 16px 48px rgba(0, 0, 0, .5);
}

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

/* Smooth cross-fade when the theme flips (kept off elements that animate on hover). */
.kb-page,
.kb-header, .kb-sidebar, .kb-footer, .kb-main,
.kb-cat-card, .kb-related-grid a, .kb-callout, .kb-chip,
.kb-search input, .kb-icon-btn, .kb-portal-link, .kb-results {
  transition: background-color .25s ease, border-color .25s ease, color .2s ease, box-shadow .2s ease;
}

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

.kb-page :focus-visible {
  outline: 3px solid var(--kb-ring);
  outline-offset: 2px;
  border-radius: 6px;
}

.kb-page code, .kb-page kbd {
  font-family: var(--kb-mono);
  font-size: .86em;
  background: var(--kb-code-bg);
  border: 1px solid var(--kb-border);
  border-radius: 6px;
  padding: .08em .4em;
  color: var(--kb-text);
}

.kb-page pre {
  background: var(--kb-code-bg);
  border: 1px solid var(--kb-border);
  border-radius: 12px;
  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: 14px;
  padding: 0 clamp(16px, 3vw, 28px);
  background: var(--kb-surface);
  border-bottom: 1px solid var(--kb-border);
  box-shadow: var(--kb-shadow-sm);
}

.kb-brand {
  display: flex;
  align-items: center;
  gap: 11px;
  font-weight: 700;
  color: var(--kb-text);
  white-space: nowrap;
}
.kb-brand:hover { text-decoration: none; }
.kb-brand-text { display: flex; flex-direction: column; line-height: 1.15; font-size: 1rem; }
.kb-brand-text small { color: var(--kb-text-faint); font-weight: 500; font-size: .72rem; letter-spacing: .02em; }

.kb-logo {
  width: 34px; height: 34px;
  display: grid; place-items: center;
  background: linear-gradient(135deg, var(--kb-primary), var(--kb-accent));
  color: #fff;
  border-radius: 10px;
  font-weight: 800;
  font-size: 1.05rem;
  box-shadow: 0 4px 12px var(--kb-ring);
  flex: none;
}
.kb-logo-sm { width: 26px; height: 26px; font-size: .85rem; border-radius: 8px; box-shadow: none; }

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

.kb-icon-btn {
  display: inline-grid; place-items: center;
  width: 40px; height: 40px;
  background: var(--kb-surface);
  border: 1px solid var(--kb-border);
  border-radius: var(--kb-radius-sm);
  color: var(--kb-text-soft);
  cursor: pointer;
  flex: none;
}
.kb-icon-btn:hover { background: var(--kb-surface-2); color: var(--kb-text); border-color: var(--kb-border-strong); }
.kb-icon-btn:active { transform: translateY(1px); }

.kb-portal-link {
  display: inline-flex; align-items: center; gap: 7px;
  padding: 8px 14px;
  border: 1px solid var(--kb-border);
  border-radius: var(--kb-radius-sm);
  color: var(--kb-text-soft);
  font-size: .9rem; font-weight: 500;
  white-space: nowrap;
}
.kb-portal-link:hover { background: var(--kb-surface-2); color: var(--kb-text); border-color: var(--kb-border-strong); text-decoration: none; }

.kb-menu-btn { display: none; }

/* ── Search ───────────────────────────────────────────────────────────────── */
.kb-search { position: relative; width: min(440px, 42vw); }
.kb-search input {
  width: 100%;
  padding: 10px 14px 10px 40px;
  border: 1px solid var(--kb-border);
  border-radius: var(--kb-radius-sm);
  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 13px center;
  color: var(--kb-text);
  font-size: .95rem;
  font-family: inherit;
}
.kb-search input::placeholder { color: var(--kb-text-faint); }
.kb-search input:focus {
  outline: none;
  border-color: var(--kb-primary);
  background-color: var(--kb-surface);
  box-shadow: 0 0 0 3px var(--kb-ring);
}

.kb-results {
  position: absolute;
  top: calc(100% + 8px);
  left: 0; right: 0;
  background: var(--kb-surface);
  border: 1px solid var(--kb-border);
  border-radius: 14px;
  box-shadow: var(--kb-shadow-lg);
  max-height: 62vh;
  overflow-y: auto;
  display: none;
  padding: 7px;
  z-index: 60;
}
.kb-results.open { display: block; }
.kb-results .kb-result {
  display: block;
  padding: 10px 12px;
  border-radius: 10px;
  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: .7rem; font-weight: 600; text-transform: uppercase; letter-spacing: .05em;
  color: var(--kb-primary);
}
.kb-results .kb-result .r-sum { font-size: .85rem; color: var(--kb-text-soft); }
.kb-results .kb-empty { padding: 16px; 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: 24px 16px 60px 22px;
  border-right: 1px solid var(--kb-border);
}
.kb-sidebar h3 {
  display: flex; align-items: center; gap: 8px;
  font-size: .72rem;
  text-transform: uppercase;
  letter-spacing: .07em;
  color: var(--kb-text-faint);
  margin: 22px 0 8px;
  padding-left: 10px;
}
.kb-sidebar .kb-nav-ico { font-size: .95rem; }
.kb-sidebar .kb-nav-cat:first-child h3 { margin-top: 0; }
.kb-sidebar a {
  display: block;
  padding: 8px 12px;
  border-radius: var(--kb-radius-sm);
  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;
  box-shadow: inset 3px 0 0 var(--kb-primary);
}
.kb-nav-ico { display: inline-flex; align-items: center; color: var(--kb-text-faint); }

/* ── Custom scrollbars (nav sidebar + search results) ─────────────────────── */
.kb-sidebar,
.kb-results { scrollbar-width: thin; scrollbar-color: var(--kb-border-strong) transparent; }

.kb-sidebar::-webkit-scrollbar,
.kb-results::-webkit-scrollbar { width: 10px; }

.kb-sidebar::-webkit-scrollbar-track,
.kb-results::-webkit-scrollbar-track { background: transparent; }

.kb-sidebar::-webkit-scrollbar-thumb,
.kb-results::-webkit-scrollbar-thumb {
  background-color: var(--kb-border-strong);
  border-radius: 999px;
  border: 3px solid transparent;      /* inset the thumb so it reads as a thin pill */
  background-clip: content-box;
}
.kb-sidebar:hover::-webkit-scrollbar-thumb,
.kb-results::-webkit-scrollbar-thumb:hover { background-color: var(--kb-text-faint); }
.kb-sidebar::-webkit-scrollbar-thumb:active { background-color: var(--kb-primary); }

/* ── Inline SVG icons (KbIcons) ───────────────────────────────────────────── */
.kb-ico { display: block; flex: none; }
.kb-chip .kb-ico { width: 14px; height: 14px; }

/* ── Main content ─────────────────────────────────────────────────────────── */
.kb-main { padding: 30px clamp(20px, 4vw, 56px) 80px; min-width: 0; }

.kb-breadcrumbs {
  font-size: .85rem;
  color: var(--kb-text-faint);
  margin-bottom: 20px;
}
.kb-breadcrumbs a { color: var(--kb-text-soft); }
.kb-breadcrumbs a:hover { color: var(--kb-primary); }
.kb-breadcrumbs span { margin: 0 7px; color: var(--kb-border-strong); }

.kb-article { max-width: 820px; }
.kb-article h1 {
  font-size: clamp(1.8rem, 1.2rem + 1.8vw, 2.4rem);
  line-height: 1.15;
  margin: 0 0 10px;
  letter-spacing: -.02em;
  font-weight: 700;
}
.kb-article .kb-lede {
  font-size: 1.14rem;
  color: var(--kb-text-soft);
  margin: 0 0 26px;
}
.kb-article h2 {
  font-size: 1.4rem;
  font-weight: 650;
  margin: 40px 0 14px;
  padding-top: 26px;
  border-top: 1px solid var(--kb-border);
  scroll-margin-top: calc(var(--kb-header-h) + 16px);
  letter-spacing: -.01em;
}
.kb-article h2:first-of-type { border-top: none; padding-top: 0; }
.kb-article h3 {
  font-size: 1.1rem; margin: 26px 0 8px;
  scroll-margin-top: calc(var(--kb-header-h) + 16px);
}
.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: 3px 0 16px 48px;
  margin: 0;
}
.kb-article ol.kb-steps > li::before {
  content: counter(step);
  position: absolute; left: 0; top: 0;
  width: 32px; height: 32px;
  display: grid; place-items: center;
  background: linear-gradient(135deg, var(--kb-primary), var(--kb-accent));
  color: #fff;
  border-radius: 50%; font-weight: 700; font-size: .9rem;
  box-shadow: 0 3px 8px var(--kb-ring);
}
.kb-article ol.kb-steps > li:not(:last-child)::after {
  content: ""; position: absolute; left: 16px; top: 34px; bottom: 2px;
  width: 2px; background: var(--kb-border);
}

/* tables */
.kb-article table {
  width: 100%; border-collapse: collapse; margin: 6px 0 22px; font-size: .93rem;
  border: 1px solid var(--kb-border); border-radius: 12px; overflow: hidden;
}
.kb-article th, .kb-article td {
  text-align: left; padding: 11px 14px; border-bottom: 1px solid var(--kb-border); vertical-align: top;
}
.kb-article tr:last-child td { border-bottom: none; }
.kb-article th { background: var(--kb-surface-2); font-weight: 600; color: var(--kb-text); }
.kb-article tbody tr:hover td { background: var(--kb-surface-2); }

/* admonitions / callouts */
.kb-callout {
  display: flex; gap: 12px;
  border: 1px solid var(--kb-border);
  border-left-width: 4px;
  border-radius: 12px;
  padding: 13px 16px;
  margin: 0 0 18px;
  background: var(--kb-surface);
}
.kb-callout .kb-callout-ico { flex: none; display: inline-flex; margin-top: 2px; }
.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 26px; }
.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: 5px 12px;
}

/* related */
.kb-related { margin-top: 48px; border-top: 1px solid var(--kb-border); padding-top: 24px; }
.kb-related h2 { border: none; padding: 0; margin: 0 0 14px; font-size: 1.15rem; }
.kb-related-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(230px, 1fr)); gap: 14px; }
.kb-related-grid a {
  display: block; padding: 14px 16px;
  border: 1px solid var(--kb-border); border-radius: 12px;
  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); transform: translateY(-2px); }
.kb-related-grid a .r-title { font-weight: 600; display: block; margin-bottom: 3px; }
.kb-related-grid a .r-sum { font-size: .85rem; color: var(--kb-text-soft); }

/* ── Index / landing ──────────────────────────────────────────────────────── */
.kb-hero {
  position: relative;
  max-width: var(--kb-maxw); margin: 0 auto; padding: 64px clamp(20px,5vw,56px) 16px;
  text-align: center;
  overflow: hidden;
}
.kb-hero::before {
  content: ""; position: absolute; inset: 0; z-index: 0; pointer-events: none;
  background:
    radial-gradient(560px 220px at 32% 8%, var(--kb-hero-glow-1), transparent 70%),
    radial-gradient(520px 220px at 72% 4%, var(--kb-hero-glow-2), transparent 72%);
}
.kb-hero > * { position: relative; z-index: 1; }
.kb-eyebrow {
  display: inline-block;
  font-size: .74rem; font-weight: 700; text-transform: uppercase; letter-spacing: .12em;
  color: var(--kb-primary-strong);
  background: var(--kb-primary-soft);
  border: 1px solid var(--kb-primary-soft);
  padding: 5px 13px; border-radius: 999px;
  margin-bottom: 16px;
}
.kb-hero h1 { font-size: clamp(2rem, 1.4rem + 2.6vw, 3.1rem); margin: 0 0 12px; letter-spacing: -.025em; font-weight: 750; }
.kb-hero p { font-size: 1.15rem; color: var(--kb-text-soft); margin: 0 auto 28px; max-width: 640px; }
.kb-hero .kb-search { width: min(640px, 92vw); margin: 0 auto; }
.kb-hero .kb-search input { padding: 15px 16px 15px 46px; font-size: 1.05rem; border-radius: 14px; box-shadow: var(--kb-shadow-sm); }
.kb-hero .kb-search input:focus { box-shadow: 0 0 0 4px var(--kb-ring); }

.kb-cats {
  max-width: var(--kb-maxw); margin: 0 auto; padding: 34px clamp(20px,5vw,56px) 80px;
  display: grid; grid-template-columns: repeat(auto-fill, minmax(300px, 1fr)); gap: 20px;
}
.kb-cat-card {
  position: relative;
  display: block; padding: 22px; border-radius: var(--kb-radius);
  background: var(--kb-surface); border: 1px solid var(--kb-border); color: var(--kb-text);
  overflow: hidden;
}
.kb-cat-card::before {
  content: ""; position: absolute; left: 0; right: 0; top: 0; height: 3px;
  background: linear-gradient(90deg, var(--kb-primary), var(--kb-accent));
  opacity: 0; transition: opacity .18s ease;
}
.kb-cat-card:hover {
  text-decoration: none; box-shadow: var(--kb-shadow); border-color: var(--kb-primary);
  transform: translateY(-3px); transition: transform .16s ease, box-shadow .18s ease, border-color .18s ease;
}
.kb-cat-card:hover::before { opacity: 1; }
.kb-cat-card .kb-cat-ico {
  width: 46px; height: 46px; border-radius: 12px; display: grid; place-items: center;
  background: var(--kb-primary-soft); color: var(--kb-primary-strong); font-size: 1.35rem; margin-bottom: 14px;
}
.kb-cat-card h2 { font-size: 1.14rem; margin: 0 0 5px; border: none; padding: 0; font-weight: 650; letter-spacing: -.01em; }
.kb-cat-card > p { color: var(--kb-text-soft); font-size: .92rem; margin: 0 0 14px; }
.kb-cat-card ul { margin: 0; padding: 0; list-style: none; }
.kb-cat-card li { font-size: .9rem; margin-bottom: 2px; }
.kb-cat-card li a {
  display: block; padding: 5px 8px; margin: 0 -8px; border-radius: 8px;
  color: var(--kb-text-soft);
}
.kb-cat-card li a:hover { background: var(--kb-surface-2); color: var(--kb-primary); text-decoration: none; }

/* ── Footer ───────────────────────────────────────────────────────────────── */
.kb-footer {
  border-top: 1px solid var(--kb-border);
  padding: 24px clamp(20px, 5vw, 56px);
  max-width: var(--kb-maxw); margin: 0 auto;
  display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 12px;
  color: var(--kb-text-faint);
  font-size: .86rem;
}
.kb-footer-brand { display: inline-flex; align-items: center; gap: 10px; }
.kb-footer-links a { color: var(--kb-text-soft); margin-left: 18px; }
.kb-footer-links a:first-child { margin-left: 0; }
.kb-footer-links a:hover { color: var(--kb-primary); }

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

/* ── Responsive ───────────────────────────────────────────────────────────── */
@media (max-width: 900px) {
  .kb-menu-btn { display: inline-grid; }
  .kb-brand-text small { display: none; }
  .kb-search { width: 100%; }
  .kb-portal-link span { display: none; }
  .kb-portal-link { padding: 8px 10px; }
  .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;
    box-shadow: var(--kb-shadow-lg);
  }
  .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(2, 12, 18, .5); z-index: 55;
  }
  .kb-footer { flex-direction: column; text-align: center; }
  .kb-footer-links a:first-child { margin-left: 18px; }
}

@media (prefers-reduced-motion: reduce) {
  .kb-page, .kb-page * { transition: none !important; scroll-behavior: auto; }
}

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

/* Staff handbook: the "Internal" mark in the header.

   Not decoration. These pages describe how staff operate across customer workspaces, and the layout is
   otherwise identical to the customer knowledge base — someone landing mid-article should never have to
   work out which of the two they are reading. */
.kb-staff-badge {
    display: inline-flex;
    align-items: center;
    margin-left: 10px;
    padding: 2px 9px;
    border-radius: 3px;
    border: 1px solid currentColor;
    font-size: 11px;
    font-weight: 600;
    letter-spacing: .07em;
    text-transform: uppercase;
    color: #b45309;
    white-space: nowrap;
}

.kb-theme-dark .kb-staff-badge { color: #e2955a; }