/**
 * assets/css/nav.css
 *
 * Navigation and header styles.
 * Loaded globally via head-common.php.
 */

/* =========================================================
   SITE HEADER
   ========================================================= */

.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: var(--z-nav);
  padding: var(--space-4) 0;
  transition: background var(--duration-slow) var(--ease-gentle),
              backdrop-filter var(--duration-slow) var(--ease-gentle),
              box-shadow var(--duration-slow) var(--ease-gentle);
}

.site-header.is-scrolled {
  background: rgba(8, 13, 26, 0.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  box-shadow: 0 1px 0 var(--glass-border);
}

.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-6);
  max-width: var(--content-lg);
  margin-inline: auto;
  padding-inline: var(--space-6);
}

/* =========================================================
   LOGO
   ========================================================= */

.site-logo {
  display: inline-flex;
  align-items: baseline;
  gap: var(--space-2);
  text-decoration: none;
  flex-shrink: 0;
}

.site-logo__name {
  font-family: var(--font-display);
  font-size: var(--text-2xl);
  font-weight: 300;
  color: var(--moon-white);
  letter-spacing: 0.03em;
  transition: color var(--duration-fast) var(--ease-gentle);
}

.site-logo:hover .site-logo__name {
  color: var(--gold-lantern);
}

.site-logo__star {
  color: var(--gold-lantern);
  font-size: var(--text-sm);
  opacity: 0.7;
}

/* =========================================================
   DESKTOP NAV
   ========================================================= */

.site-nav {
  display: flex;
  align-items: center;
  gap: var(--space-1);
}

.nav__link {
  display: inline-flex;
  align-items: center;
  padding: var(--space-2) var(--space-4);
  border-radius: var(--radius-full);
  font-size: var(--text-sm);
  color: var(--moon-soft);
  text-decoration: none;
  transition:
    color var(--duration-fast) var(--ease-gentle),
    background var(--duration-fast) var(--ease-gentle);
  min-height: 36px;
  white-space: nowrap;
}

.nav__link:hover {
  color: var(--moon-white);
  background: var(--glass-bg);
}

.nav__link--active {
  color: var(--gold-lantern);
  background: rgba(232, 201, 122, 0.08);
}

.nav__link--active:hover {
  color: var(--gold-warm);
  background: rgba(232, 201, 122, 0.12);
}

/* CTA link in nav */
.nav__cta {
  margin-left: var(--space-2);
  padding: var(--space-2) var(--space-5);
  background: rgba(232, 201, 122, 0.1);
  border: 1px solid rgba(232, 201, 122, 0.2);
  border-radius: var(--radius-full);
  color: var(--gold-lantern);
  font-size: var(--text-sm);
  text-decoration: none;
  transition:
    background var(--duration-fast) var(--ease-gentle),
    border-color var(--duration-fast) var(--ease-gentle);
  min-height: 36px;
  display: inline-flex;
  align-items: center;
}

.nav__cta:hover {
  background: rgba(232, 201, 122, 0.18);
  border-color: rgba(232, 201, 122, 0.4);
  color: var(--gold-lantern);
}

/* =========================================================
   MOBILE NAV TOGGLE
   ========================================================= */

.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 5px;
  width: 44px;
  height: 44px;
  border-radius: var(--radius-sm);
  background: transparent;
  border: 1px solid var(--glass-border);
  cursor: pointer;
  flex-shrink: 0;
  transition: background var(--duration-fast) var(--ease-gentle),
              border-color var(--duration-fast) var(--ease-gentle);
}

.nav-toggle:hover {
  background: var(--glass-bg);
  border-color: var(--glass-border-hover);
}

.nav-toggle__bar {
  display: block;
  width: 20px;
  height: 1.5px;
  background: var(--moon-soft);
  border-radius: 2px;
  transition: transform var(--duration-fast) var(--ease-gentle),
              opacity var(--duration-fast) var(--ease-gentle);
}

.nav-toggle[aria-expanded="true"] .nav-toggle__bar:nth-child(1) {
  transform: translateY(6.5px) rotate(45deg);
}

.nav-toggle[aria-expanded="true"] .nav-toggle__bar:nth-child(2) {
  opacity: 0;
}

.nav-toggle[aria-expanded="true"] .nav-toggle__bar:nth-child(3) {
  transform: translateY(-6.5px) rotate(-45deg);
}

/* =========================================================
   MOBILE NAV PANEL
   ========================================================= */

.mobile-nav {
  display: none;
  position: fixed;
  inset: 0;
  top: 0;
  z-index: calc(var(--z-nav) - 1);
  background: rgba(8, 13, 26, 0.98);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  padding-top: 80px;
  padding-inline: var(--space-6);
  padding-bottom: var(--space-8);
  flex-direction: column;
  gap: var(--space-2);
  opacity: 0;
  transform: translateY(-8px);
  transition:
    opacity var(--duration-mid) var(--ease-gentle),
    transform var(--duration-mid) var(--ease-gentle);
  overflow-y: auto;
}

.mobile-nav.is-open {
  opacity: 1;
  transform: translateY(0);
}

.mobile-nav__link {
  display: flex;
  align-items: center;
  padding: var(--space-4) var(--space-4);
  border-radius: var(--radius-md);
  font-size: var(--text-lg);
  color: var(--moon-soft);
  text-decoration: none;
  border-bottom: 1px solid var(--glass-border);
  min-height: 56px;
  transition:
    color var(--duration-fast) var(--ease-gentle),
    background var(--duration-fast) var(--ease-gentle);
}

.mobile-nav__link:hover,
.mobile-nav__link.is-active {
  color: var(--gold-lantern);
  background: rgba(232, 201, 122, 0.05);
}

.mobile-nav__link:last-child {
  border-bottom: none;
}

/* =========================================================
   RESPONSIVE — show/hide
   ========================================================= */

@media (max-width: 768px) {
  .site-nav {
    display: none;
  }

  .nav-toggle {
    display: flex;
  }

  .mobile-nav {
    display: flex;
  }
}