/* ============================================================
   NAV — Sticky, blur backdrop, mobile hamburger
   ============================================================ */

.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: var(--z-nav);
  height: var(--nav-height);
  transition: height var(--transition-base), background var(--transition-base), border-color var(--transition-base), box-shadow var(--transition-base);
  border-bottom: 1px solid transparent;
}

.nav.scrolled {
  height: var(--nav-height-scrolled);
  background: rgba(13, 13, 13, 0.88);
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  border-bottom-color: rgba(200, 169, 110, 0.15);
  box-shadow: 0 4px 40px rgba(0, 0, 0, 0.4);
}

.nav__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}

/* ── Logo ── */
.nav__logo {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  text-decoration: none;
}

.nav__logo-title {
  font-family: var(--font-serif);
  font-size: var(--text-lg);
  font-weight: 700;
  color: var(--color-cream);
  letter-spacing: -0.01em;
  white-space: nowrap;
  transition: color var(--transition-fast);
}

.nav__logo:hover .nav__logo-title {
  color: var(--color-champagne-light);
}

/* ── Desktop links ── */
.nav__links {
  display: flex;
  align-items: center;
  gap: var(--space-8);
}

.nav__link {
  position: relative;
  font-family: var(--font-sans);
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-cream-muted);
  text-decoration: none;
  transition: color var(--transition-fast);
  padding-block: var(--space-1);
}

.nav__link::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 100%;
  height: 1px;
  background: var(--color-champagne);
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform var(--transition-base);
}

.nav__link:hover,
.nav__link.active {
  color: var(--color-cream);
}

.nav__link:hover::after,
.nav__link.active::after {
  transform: scaleX(1);
}

.nav__link--cta {
  padding: var(--space-2) var(--space-5);
  border-radius: var(--radius-full);
  border: 1px solid var(--color-glass-border);
  color: var(--color-champagne-light);
  transition: all var(--transition-base);
}

.nav__link--cta::after { display: none; }

.nav__link--cta:hover {
  background: var(--color-champagne);
  border-color: var(--color-champagne);
  color: var(--color-charcoal-deep);
}

/* ── Hamburger ── */
.nav__hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  width: 28px;
  cursor: pointer;
  z-index: var(--z-modal);
}

.nav__hamburger span {
  display: block;
  width: 100%;
  height: 1.5px;
  background: var(--color-cream);
  border-radius: 2px;
  transition: all var(--transition-base);
  transform-origin: center;
}

.nav__hamburger.open span:nth-child(1) {
  transform: translateY(6.5px) rotate(45deg);
}
.nav__hamburger.open span:nth-child(2) {
  opacity: 0;
  transform: scaleX(0);
}
.nav__hamburger.open span:nth-child(3) {
  transform: translateY(-6.5px) rotate(-45deg);
}

/* ── Mobile menu overlay ── */
.nav__mobile {
  position: fixed;
  inset: 0;
  background: rgba(13, 13, 13, 0.97);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: var(--space-8);
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--transition-base);
  z-index: calc(var(--z-nav) - 1);
}

.nav__mobile.open {
  opacity: 1;
  pointer-events: all;
}

.nav__mobile-link {
  font-family: var(--font-serif);
  font-size: var(--text-2xl);
  font-weight: 400;
  color: var(--color-cream-muted);
  text-decoration: none;
  transition: color var(--transition-base), transform var(--transition-base);
  transform: translateY(20px);
}

.nav__mobile.open .nav__mobile-link {
  transform: translateY(0);
  transition-delay: calc(var(--i, 0) * 60ms);
}

.nav__mobile-link:hover {
  color: var(--color-champagne-light);
}

.nav__mobile-link--cta {
  color: var(--color-champagne);
  font-size: var(--text-2xl);
  border: 1px solid var(--color-glass-border);
  padding: var(--space-3) var(--space-8);
  border-radius: var(--radius-full);
  margin-top: var(--space-4);
}

/* Set stagger delays on mobile links */
.nav__mobile-link:nth-child(1) { --i: 1; }
.nav__mobile-link:nth-child(2) { --i: 2; }
.nav__mobile-link:nth-child(3) { --i: 3; }
.nav__mobile-link:nth-child(4) { --i: 4; }
.nav__mobile-link:nth-child(5) { --i: 5; }
.nav__mobile-link:nth-child(6) { --i: 6; }
.nav__mobile-link:nth-child(7) { --i: 7; }

/* ── Responsive ── */
@media (max-width: 900px) {
  .nav__links {
    display: none;
  }
  .nav__hamburger {
    display: flex;
  }
}