/* ============================================================
   nav.css — shared chrome (navbar + prev/next) for EVERY page.
   Injected automatically by nav.js, so the navbar is always
   styled, including on index.html which uses its own layout CSS.
   ============================================================ */

:root {
  --nav-bg: #0b1728;
  --nav-border: rgba(96, 165, 250, 0.18);
  --nav-fg: #e2e8f0;
  --nav-accent: #fbbf24;
  --nav-muted: #94a3b8;
  --nav-font: 'Exo 2', "Trebuchet MS", "Lucida Grande", Arial, sans-serif;
}

html.light {
  --nav-bg: #1e3a5f;
  --nav-border: rgba(30, 58, 95, 0.25);
  --nav-fg: #e2e8f0;
  --nav-accent: #fbbf24;
  --nav-muted: #cbd5e1;
}

/* ---------- top navbar ---------- */
.site-nav {
  background: var(--nav-bg);
  border-bottom: 1px solid var(--nav-border);
  padding: 0.5rem 1rem;
  position: sticky;
  top: 0;
  z-index: 1000;
  font-family: var(--nav-font);
  margin: 0;
}
.site-nav-inner {
  max-width: 1100px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  gap: 1.25rem;
  flex-wrap: wrap;
}
.site-nav .nav-link {
  color: var(--nav-fg) !important;
  text-decoration: none;
  font-weight: 600;
  font-size: 0.92rem;
  padding: 0.2rem 0;
  border-bottom: 2px solid transparent;
  transition: color 0.2s, border-color 0.2s;
}
.site-nav .nav-link:hover,
.site-nav .nav-link:focus-visible {
  color: var(--nav-accent) !important;
  border-bottom-color: var(--nav-accent);
}
.site-nav .nav-btn {
  margin-left: auto;
  background: none;
  border: 1px solid var(--nav-muted);
  color: var(--nav-fg);
  padding: 0.3rem 0.75rem;
  border-radius: 6px;
  cursor: pointer;
  font-size: 0.82rem;
  font-family: inherit;
  transition: background 0.2s, border-color 0.2s;
}
.site-nav .nav-btn:hover {
  background: rgba(148, 163, 184, 0.18);
  border-color: var(--nav-accent);
}

/* ---------- prev / next ---------- */
.page-nav {
  max-width: 1100px;
  margin: 3rem auto 1rem;
  padding: 1.25rem 1.25rem 0;
  border-top: 1px solid var(--nav-border);
  font-family: var(--nav-font);
}
.page-nav-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.75rem;
}
.page-nav-link {
  text-decoration: none;
  font-weight: 600;
  font-size: 0.92rem;
  color: #60a5fa;
  padding: 0.4rem 0;
}
html.light .page-nav-link { color: #2563eb; }
.page-nav-link:hover { color: var(--nav-accent); text-decoration: underline; }
.page-nav-link.home { color: var(--nav-muted); font-weight: 500; }

@media (max-width: 480px) {
  .site-nav-inner { gap: 0.75rem; }
  .site-nav .nav-link { font-size: 0.85rem; }
  .page-nav-inner { flex-direction: column; align-items: stretch; text-align: center; }
}