/* ════════════════════════════════════════════════════════════════════════════
   NAVIGATION — sticky header, desktop links, mobile drawer, theme toggle.
   Markup is rebuilt in partials/nav.php with ao- classes, but the JS element
   IDs (siteNav, navLinks, navHamburger, mobileNav, mobileNavBackdrop,
   themeToggle, themeToggleMobile) are preserved.
   Mobile-first: drawer by default, desktop links from 1024px.
   ════════════════════════════════════════════════════════════════════════════ */

.ao-nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: var(--z-nav);
  background: var(--nav-bg);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid transparent;
  transition: border-color var(--dur-base) var(--ease-standard),
              background-color var(--dur-base) var(--ease-standard);
}
.ao-nav.is-scrolled {
  border-bottom-color: var(--color-border);
  background: var(--nav-bg-solid);
}
.ao-nav__inner {
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: var(--container-pad);
  height: var(--nav-height);
  display: flex;
  align-items: center;
  gap: var(--space-8);
}

/* Page content offset for the fixed header */
body { padding-top: var(--nav-height); }

/* ── Logo lockup ───────────────────────────────────────────────────────────── */
.ao-nav__logo { flex-shrink: 0; display: inline-flex; align-items: center; text-decoration: none; }
.logo-lockup {
  display: inline-flex;
  align-items: center;
  gap: 11px;
  text-decoration: none;
  user-select: none;
}
.logo-mark { display: block; flex-shrink: 0; }
.logo-wordmark {
  font-family: var(--font-sans);
  font-size: 13px;
  font-weight: var(--weight-semi);
  letter-spacing: 0.18em;
  line-height: 1;
  white-space: nowrap;
  color: var(--color-text);
  text-transform: uppercase;
}
.logo-wordmark__bold  { font-weight: var(--weight-bold); }
.logo-wordmark__light { font-weight: var(--weight-normal); opacity: 0.55; }
.logo-lockup--white .logo-wordmark        { color: #ffffff; }
.logo-lockup--white .logo-wordmark__light { opacity: 0.5; }

/* ── Desktop links ─────────────────────────────────────────────────────────── */
.ao-nav__links {
  display: none;
  align-items: center;
  gap: var(--space-1);
  margin-left: auto;
}
.ao-nav__link {
  font-size: var(--text-sm);
  font-weight: var(--weight-medium);
  color: var(--color-text-2);
  padding: var(--space-2) var(--space-3);
  border-radius: var(--radius-md);
  white-space: nowrap;
  text-decoration: none;
  transition: color var(--dur-fast) var(--ease-standard),
              background-color var(--dur-fast) var(--ease-standard);
}
.ao-nav__link:hover { color: var(--color-text); background: var(--color-bg-muted); }
.ao-nav__link.is-active,
.ao-nav__link[aria-current="page"] { color: var(--color-accent); font-weight: var(--weight-semi); }

.ao-nav__actions {
  display: none;
  align-items: center;
  gap: var(--space-4);
  margin-left: var(--space-4);
  flex-shrink: 0;
}
.ao-nav__portal {
  font-size: var(--text-sm);
  font-weight: var(--weight-medium);
  color: var(--color-text-3);
  text-decoration: none;
  white-space: nowrap;
  transition: color var(--dur-fast) var(--ease-standard);
}
.ao-nav__portal:hover { color: var(--color-accent); }

/* ── Theme toggle ──────────────────────────────────────────────────────────── */
.ao-theme-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px; height: 40px;
  padding: 0;
  border: 1px solid transparent;
  border-radius: var(--radius-full);
  background: none;
  color: var(--color-text-2);
  cursor: pointer;
  transition: color var(--dur-fast) var(--ease-standard),
              border-color var(--dur-fast) var(--ease-standard),
              background-color var(--dur-fast) var(--ease-standard);
}
.ao-theme-toggle:hover {
  color: var(--color-text);
  border-color: var(--color-border);
  background: var(--color-bg-muted);
}
/* Sun/moon swap — driven by html[data-theme] */
.ao-theme-toggle .theme-toggle__moon { display: block; }
.ao-theme-toggle .theme-toggle__sun  { display: none; }
html[data-theme="dark"] .ao-theme-toggle .theme-toggle__moon { display: none; }
html[data-theme="dark"] .ao-theme-toggle .theme-toggle__sun  { display: block; }
/* Mobile drawer variant — square outlined button beside the CTA */
.ao-theme-toggle--drawer {
  width: 48px; height: 48px;
  flex-shrink: 0;
  border-color: var(--color-border);
  background: var(--color-surface);
}

/* ── Hamburger ─────────────────────────────────────────────────────────────── */
.ao-nav__burger {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 5px;
  width: 44px; height: 44px;
  padding: var(--space-3);
  margin-left: auto;
  cursor: pointer;
  background: none;
  border: none;
}
.ao-nav__burger span {
  display: block;
  width: 22px; height: 2px;
  background: var(--color-text);
  border-radius: 2px;
  transition: transform var(--dur-base) var(--ease-standard),
              opacity var(--dur-base) var(--ease-standard);
}
.ao-nav__burger.is-open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.ao-nav__burger.is-open span:nth-child(2) { opacity: 0; }
.ao-nav__burger.is-open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ── Mobile drawer ─────────────────────────────────────────────────────────── */
.ao-mnav {
  position: fixed;
  top: var(--nav-height); left: 0; right: 0; bottom: 0;
  z-index: calc(var(--z-nav) - 1);
  display: flex;
  flex-direction: column;
  background: var(--color-bg);
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
  border-top: 1px solid var(--color-border-soft);
  transform: translateX(100%);
  transition: transform var(--dur-base) var(--ease-standard);
}
.ao-mnav.is-open { transform: translateX(0); }
.ao-mnav__list {
  display: flex;
  flex-direction: column;
  flex: 1;
  padding: var(--space-4) var(--space-5) var(--space-2);
}
.mobile-nav__link {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: var(--text-md);
  font-weight: var(--weight-semi);
  letter-spacing: var(--tracking-tight);
  color: var(--color-text-2);
  padding: var(--space-4) var(--space-3);
  border-radius: var(--radius-md);
  text-decoration: none;
  transition: background-color var(--dur-fast) var(--ease-standard),
              color var(--dur-fast) var(--ease-standard);
}
.mobile-nav__link::after {
  content: "";
  flex-shrink: 0;
  width: 7px; height: 7px;
  border-top: 1.5px solid currentColor;
  border-right: 1.5px solid currentColor;
  transform: rotate(45deg);
  opacity: 0.25;
  transition: opacity var(--dur-fast) var(--ease-standard),
              transform var(--dur-fast) var(--ease-standard);
}
.mobile-nav__link:hover { background: var(--color-bg-soft); color: var(--color-text); }
.mobile-nav__link:hover::after { opacity: 0.5; transform: rotate(45deg) translate(2px, -2px); }
.mobile-nav__link--active { color: var(--color-accent); background: var(--color-accent-light); }
.mobile-nav__link--active::after { opacity: 0.45; }

.ao-mnav__divider {
  height: 1px;
  background: var(--color-border-soft);
  margin: var(--space-2) var(--space-3);
}
/* Same typography as the other drawer links — only the accent surface differs */
.mobile-nav__link--portal {
  color: var(--color-accent);
  background: var(--color-accent-light);
}
.mobile-nav__link--portal:hover { color: var(--color-accent-hover); background: var(--color-accent-light); }

.ao-mnav__cta {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-5) var(--space-5) calc(var(--space-8) + env(safe-area-inset-bottom, 0px));
  border-top: 1px solid var(--color-border-soft);
  background: var(--color-bg-soft);
}
.ao-mnav__cta .ao-btn { flex: 1; }

.ao-nav-backdrop {
  position: fixed;
  inset: var(--nav-height) 0 0 0;
  z-index: calc(var(--z-nav) - 2);
  background: var(--overlay);
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--dur-base) var(--ease-standard);
}
.ao-nav-backdrop.is-open { opacity: 1; pointer-events: auto; }

/* ── Desktop from 1024px ───────────────────────────────────────────────────── */
@media (min-width: 1024px) {
  .ao-nav__links   { display: flex; }
  .ao-nav__actions { display: flex; }
  .ao-nav__burger  { display: none; }
  .ao-mnav         { display: none; }
  .ao-nav-backdrop { display: none; }
}

@media (prefers-reduced-motion: reduce) {
  .ao-mnav, .ao-nav-backdrop, .ao-nav__burger span { transition: none; }
}