/* Floating primary nav. Colours come from codex-theme.css, which must load first. */

:root {
  --nav-bg: rgba(255, 255, 255, 0.86);
  --nav-border: rgba(184, 145, 44, 0.34);
  --nav-shadow: 0 14px 40px rgba(26, 26, 29, 0.16);
  --nav-current-bg: #7a5e12;
  --nav-current-fg: #ffffff;
}

@media (prefers-color-scheme: dark) {
  :root {
    --nav-bg: rgba(20, 20, 23, 0.82);
    --nav-border: rgba(219, 184, 74, 0.28);
    --nav-shadow: 0 14px 40px rgba(0, 0, 0, 0.45);
    --nav-current-bg: #dbb84a;
    --nav-current-fg: #0a0a0d;
  }
}

/* Site-wide 16pt base type scale; primary page titles opt out locally. */
html {
  font-size: 21.333px;
}

.site-nav {
  position: fixed;
  left: 50%;
  bottom: max(18px, env(safe-area-inset-bottom));
  z-index: 1000;
  display: flex;
  gap: 4px;
  width: max-content;
  max-width: calc(100vw - 24px);
  overflow-x: auto;
  padding: 5px;
  border: 1px solid var(--nav-border);
  border-radius: 999px;
  background: var(--nav-bg);
  box-shadow: var(--nav-shadow);
  backdrop-filter: blur(18px) saturate(140%);
  -webkit-backdrop-filter: blur(18px) saturate(140%);
  transform: translateX(-50%);
  scrollbar-width: none;
}

.site-nav::-webkit-scrollbar { display: none; }

.site-nav a {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 38px;
  padding: 0 17px;
  border-radius: 999px;
  color: var(--text-muted);
  font: 600 17.334px/1 system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  letter-spacing: 0.02em;
  text-decoration: none;
  white-space: nowrap;
  transition: color 180ms ease, background 180ms ease, transform 180ms ease;
}

.site-nav a:hover {
  color: var(--accent);
  background: var(--accent-dim);
}

.site-nav a:active {
  transform: scale(0.97);
}

.site-nav a[aria-current="page"] {
  color: var(--nav-current-fg);
  background: var(--nav-current-bg);
  box-shadow: 0 2px 12px rgba(0, 0, 0, 0.22);
}

.site-nav a:focus-visible {
  outline: 2px solid var(--accent-bright);
  outline-offset: 2px;
}

@media (max-width: 480px) {
  .site-nav {
    bottom: max(10px, env(safe-area-inset-bottom));
  }

  .site-nav a {
    min-height: 36px;
    padding: 0 12px;
    font-size: 16.334px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .site-nav a {
    transition: none;
  }
}