/* ============================================
   NAVIGATION — single shared navbar (_NavPublic)
   Loaded by every layout so one navbar serves all pages.
   Palette comes from tokens.css (loaded first everywhere);
   the --nav-* names are kept as a local indirection so the
   rules below stay short.
   ============================================ */
:root {
  --nav-transition: var(--ntl-transition);
  --nav-border: var(--ntl-border);
  --nav-blue-light: var(--ntl-blue);
  --nav-blue-dim: var(--ntl-blue-dim);
  --nav-text-primary: var(--ntl-text);
  --nav-text-secondary: var(--ntl-text-2);
  --nav-text-muted: var(--ntl-text-3);
}

.site-nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  padding: 20px 0;
  transition: var(--nav-transition);
}

/* self-contained: don't rely on a host page's global anchor reset. Bootstrap
   (_Layout) pages underline links by default; the dark/home pages don't. */
.site-nav a { text-decoration: none; }

.site-nav.scrolled {
  background: color-mix(in srgb, var(--ntl-bg) 88%, transparent);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--nav-border);
  padding: 14px 0;
}

.nav-inner {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 40px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-logo {
  display: flex;
  align-items: center;
  transition: opacity var(--nav-transition);
}

.nav-logo:hover { opacity: 0.85; }

.nav-logo-img {
  height: 28px;
  width: auto;
  object-fit: contain;
  display: block;
}

.nav-logo-img--light { display: none; }
[data-bs-theme=light] .nav-logo-img--dark { display: none; }
[data-bs-theme=light] .nav-logo-img--light { display: block; }

/* main links group (User Guides) — always inline; no drawer */
.nav-links {
  display: flex;
  align-items: center;
  gap: 28px;
  list-style: none;
  padding: 0;
  margin: 0;
  margin-left: auto;
}

.site-nav-link {
  display: flex;
  align-items: center;
  gap: 7px;
  font-size: var(--ntl-fs-sm);
  font-weight: 400;
  color: var(--nav-text-secondary);
  letter-spacing: 0.03em;
  transition: color var(--nav-transition);
  position: relative;
  background: none;
  border: none;
  cursor: pointer;
}

.site-nav-link:hover { color: var(--nav-text-primary); }

.nav-cta {
  font-size: var(--ntl-fs-sm);
  font-weight: 500;
  color: var(--nav-blue-light);
  border: 1px solid var(--ntl-border-hover);
  border-radius: 6px;
  padding: 8px 20px;
  letter-spacing: 0.04em;
  transition: all var(--nav-transition);
}

.nav-cta:hover {
  background: var(--ntl-blue-dim);
  border-color: var(--nav-blue-light);
  color: var(--nav-text-primary);
}

/* ── Dropdowns (User Guides, Settings, user chip) ── */
.nav-dropdown { position: relative; }
.nav-dropdown-toggle { display: flex; align-items: center; gap: 6px; }
.nav-dropdown-toggle .nav-caret { transition: transform var(--nav-transition); }
.nav-dropdown.open .nav-dropdown-toggle .nav-caret { transform: rotate(180deg); }

.nav-dropdown-menu {
  display: none;
  position: absolute;
  top: calc(100% + 10px);
  left: 50%;
  transform: translateX(-50%);
  background: var(--ntl-surface);
  backdrop-filter: blur(20px);
  border: 1px solid var(--nav-border);
  border-radius: 8px;
  padding: 12px 0 8px;
  min-width: 200px;
  box-shadow: var(--ntl-shadow-md);
  z-index: 100;
}

[data-bs-theme=dark] .nav-dropdown-menu {
  background: rgba(12, 18, 32, 0.96);
}

.nav-dropdown.open .nav-dropdown-menu { display: block; }

/* right-edge dropdowns (settings, chip) must not centre */
.nav-dropdown-menu--right { left: auto; right: 0; transform: none; }

.nav-dropdown-menu li { list-style: none; }
.nav-dropdown-menu a {
  display: flex;
  align-items: center;
  gap: 9px;
  padding: 8px 20px;
  font-size: var(--ntl-fs-sm);
  font-weight: 400;
  color: var(--nav-text-secondary);
  letter-spacing: 0.03em;
  transition: color var(--nav-transition), background var(--nav-transition);
  white-space: nowrap;
  cursor: pointer;
}
.nav-dropdown-menu a:hover {
  color: var(--nav-text-primary);
  background: var(--ntl-blue-dim);
}

.nav-dropdown-menu a svg { flex-shrink: 0; opacity: 0.8; }

.nav-dropdown-header {
  padding: 10px 20px 4px;
  font-size: var(--ntl-fs-3xs);
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--nav-text-muted);
}
.nav-dropdown-divider {
  margin: 6px 20px;
  border-top: 1px solid var(--nav-border);
}

/* ── Action buttons (settings / sign-in / user chip) ──
   Live on the bar at every width: icon + label on wide
   screens, icon only on narrow ones. */
.nav-actions {
  display: flex;
  align-items: center;
  gap: 20px;
  margin-left: 28px;
}

.nav-btn-label {
  font-size: var(--ntl-fs-sm);
  letter-spacing: 0.03em;
  white-space: nowrap;
}

/* icon nav buttons (settings gear, guides) */
.nav-icon-btn { display: flex; align-items: center; gap: 7px; }

/* signed-out call to action */
.nav-signin { display: inline-flex; align-items: center; gap: 7px; }
.nav-cta--solid { background: var(--ntl-blue-dim); }

/* signed-in user chip (avatar only; the name lives in the dropdown header) */
.nav-user-chip { display: flex; align-items: center; cursor: pointer; }

.nav-avatar {
  position: relative;
  width: 30px;
  height: 30px;
  border-radius: 50%;
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--ntl-border-hover);
  background: var(--nav-blue-dim);
  transition: border-color var(--nav-transition);
}
.nav-user-chip:hover .nav-avatar { border-color: var(--nav-blue-light); }

.nav-avatar-initial {
  font-size: var(--ntl-fs-sm);
  font-weight: 600;
  color: var(--nav-blue-light);
  user-select: none;
}

.nav-avatar img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* ── Theme selection (light/dark options in the Settings menu) ── */
.nav-theme-option { cursor: pointer; }
.nav-dropdown-menu .nav-theme-option .theme-check { margin-left: auto; opacity: 0; }
/* show the tick on whichever option matches the active theme */
[data-bs-theme=light] .nav-theme-option[data-theme=light],
[data-bs-theme=dark] .nav-theme-option[data-theme=dark] { color: var(--nav-text-primary); }
[data-bs-theme=light] .nav-theme-option[data-theme=light] .theme-check,
[data-bs-theme=dark] .nav-theme-option[data-theme=dark] .theme-check { opacity: 1; color: var(--nav-blue-light); }

/* Bootstrap (_Layout) app pages: clear the fixed nav */
body.has-fixed-nav { padding-top: 72px; }

/* ── Narrow screens: everything stays on the bar as icons ── */
@media (max-width: 768px) {
  .nav-inner { padding: 0 24px; }

  .nav-links { gap: 16px; }
  .nav-actions { gap: 16px; margin-left: 16px; }

  /* hide text labels; the icons remain inline (no hamburger) */
  .nav-btn-label { display: none; }
  .nav-signin { padding: 7px 10px; }

  /* dropdown panels stay floating and right-anchored on mobile */
  .nav-links .nav-dropdown-menu,
  .nav-actions .nav-dropdown-menu { left: auto; right: 0; transform: none; }
}