/* ═══════════════════════════════════════════════════════════
   NAV.CSS — Navigation Bar & Menu Overlay
═══════════════════════════════════════════════════════════ */

/* ── Site Navigation ── */
.site-nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: var(--z-nav);
  padding: var(--space-lg) var(--space-xl);
  display: flex;
  align-items: center;
  justify-content: space-between;
  transition: all var(--dur-med) var(--ease-out);
}

.site-nav::before {
  content: '';
  position: absolute;
  inset: 0;
  background: rgba(2, 11, 45, 0);
  backdrop-filter: blur(0px);
  border-bottom: 1px solid transparent;
  transition: all var(--dur-med) var(--ease-out);
  pointer-events: none;
}

.site-nav.scrolled::before {
  background: rgba(2, 11, 45, 0.7);
  backdrop-filter: blur(24px) saturate(180%);
  border-bottom-color: var(--color-border);
}

/* ── Logo ── */
.nav-logo {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  z-index: 1;
  text-decoration: none;
  transition: opacity var(--dur-fast);
}

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

.nav-logo-mark {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-md);
  background: linear-gradient(135deg, var(--color-gold), var(--color-gold-light));
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-display);
  font-size: 1.1rem;
  font-weight: 900;
  color: #0a0600;
  box-shadow: 0 4px 16px var(--color-gold-glow);
  flex-shrink: 0;
}

.nav-logo-text {
  display: flex;
  flex-direction: column;
  line-height: 1.1;
}

.nav-logo-text-top {
  font-family: var(--font-display);
  font-size: 0.65rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-gold);
}

.nav-logo-text-bottom {
  font-family: var(--font-display);
  font-size: 0.95rem;
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--color-text-primary);
}

/* ── Nav Links (desktop) ── */
.nav-links {
  display: flex;
  align-items: center;
  gap: var(--space-xl);
  z-index: 1;
}

.nav-link {
  font-family: var(--font-display);
  font-size: 0.88rem;
  font-weight: 500;
  color: var(--color-text-muted);
  letter-spacing: 0.02em;
  transition: color var(--dur-fast);
  position: relative;
  text-decoration: none;
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 1px;
  background: var(--color-gold);
  transition: width var(--dur-med) var(--ease-out);
}

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

.nav-link:hover::after,
.nav-link.active::after {
  width: 100%;
}

.nav-link.active {
  color: var(--color-gold);
}

/* ── Menu Trigger ── */
.menu-trigger {
  z-index: 1;
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  background: var(--glass-bg);
  backdrop-filter: blur(16px);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-full);
  padding: 10px 18px;
  color: var(--color-text-primary);
  font-family: var(--font-display);
  font-size: 0.82rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  transition: all var(--dur-fast);
}

.menu-trigger:hover {
  border-color: var(--color-border-bright);
  background: var(--glass-bg-strong);
}

.menu-trigger.is-open {
  background: rgba(245, 166, 35, 0.1);
  border-color: rgba(245, 166, 35, 0.35);
  color: var(--color-gold);
}

.menu-trigger-lines {
  display: flex;
  flex-direction: column;
  gap: 4px;
  width: 18px;
}

.menu-trigger-line {
  height: 1.5px;
  background: currentColor;
  border-radius: 1px;
  transition: all var(--dur-med) var(--ease-spring);
  transform-origin: center;
}

.menu-trigger.is-open .menu-trigger-line:nth-child(1) {
  transform: translateY(5.5px) rotate(45deg);
}

.menu-trigger.is-open .menu-trigger-line:nth-child(2) {
  opacity: 0;
  transform: scaleX(0);
}

.menu-trigger.is-open .menu-trigger-line:nth-child(3) {
  transform: translateY(-5.5px) rotate(-45deg);
}

/* ── Menu Overlay ── */
.menu-overlay {
  position: fixed;
  inset: 0;
  z-index: var(--z-overlay);
  display: flex;
  flex-direction: column;
  background: rgba(2, 11, 45, 0.6);
  backdrop-filter: var(--glass-blur-heavy);
  -webkit-backdrop-filter: var(--glass-blur-heavy);
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transition: opacity var(--dur-slow) var(--ease-out),
              visibility var(--dur-slow) var(--ease-out);
}

.menu-overlay::before {
  content: '';
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 60% 50% at 15% 20%, rgba(245, 166, 35, 0.12) 0%, transparent 60%),
    radial-gradient(ellipse 50% 60% at 85% 80%, rgba(0, 212, 255, 0.08) 0%, transparent 60%);
  pointer-events: none;
}

.menu-overlay.is-open {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
}

.menu-overlay-inner {
  display: flex;
  flex-direction: column;
  justify-content: center;
  height: 100%;
  padding: var(--space-4xl) var(--space-xl);
  padding-top: 100px;
  max-width: 900px;
  margin: 0 auto;
  width: 100%;
}

.menu-overlay-nav {
  margin-bottom: var(--space-3xl);
}

.menu-overlay-link {
  display: block;
  font-family: var(--font-display);
  font-size: clamp(2.5rem, 6vw, 5rem);
  font-weight: 800;
  line-height: 1.05;
  letter-spacing: -0.03em;
  color: var(--color-text-primary);
  opacity: 0;
  transform: translateY(40px);
  transition:
    opacity var(--dur-slow) var(--ease-out),
    transform var(--dur-slow) var(--ease-out),
    color var(--dur-fast);
  text-decoration: none;
}

.menu-overlay-link:hover {
  color: var(--color-gold);
}

.menu-overlay-link.active {
  color: var(--color-gold);
}

.menu-overlay.is-open .menu-overlay-link {
  opacity: 1;
  transform: translateY(0);
}

.menu-overlay.is-open .menu-overlay-link:nth-child(1) { transition-delay: 0.05s; }
.menu-overlay.is-open .menu-overlay-link:nth-child(2) { transition-delay: 0.10s; }
.menu-overlay.is-open .menu-overlay-link:nth-child(3) { transition-delay: 0.15s; }
.menu-overlay.is-open .menu-overlay-link:nth-child(4) { transition-delay: 0.20s; }
.menu-overlay.is-open .menu-overlay-link:nth-child(5) { transition-delay: 0.25s; }
.menu-overlay.is-open .menu-overlay-link:nth-child(6) { transition-delay: 0.30s; }

.menu-overlay-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: var(--space-xl);
  border-top: 1px solid var(--color-border);
  opacity: 0;
  transform: translateY(20px);
  transition:
    opacity 0.6s var(--ease-out) 0.35s,
    transform 0.6s var(--ease-out) 0.35s;
}

.menu-overlay.is-open .menu-overlay-footer {
  opacity: 1;
  transform: translateY(0);
}

.menu-overlay-socials {
  display: flex;
  gap: var(--space-lg);
}

.menu-overlay-social {
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--color-text-muted);
  letter-spacing: 0.06em;
  transition: color var(--dur-fast);
  text-decoration: none;
}

.menu-overlay-social:hover {
  color: var(--color-gold);
}

/* ── Responsive Nav ── */
@media (max-width: 900px) {
  .nav-links { display: none; }
  .site-nav { padding-inline: var(--space-md); }
}