/* ==========================================================================
   Psychic Visions AI — Navigation
   Fixed glass-morphism header with smooth scroll links.
   ========================================================================== */

.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: var(--z-nav);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-md);
  height: var(--nav-height);
  padding: 0 var(--section-pad-x);
  background: rgba(10, 6, 20, 0.78);
  backdrop-filter: blur(24px);
  -webkit-backdrop-filter: blur(24px);
  border-bottom: 1px solid rgba(245, 215, 122, 0.12);
  transition: background var(--duration-base);
}

/* Brand logo */
.nav-brand {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  font-family: var(--font-heading);
  font-size: 1.45rem;
  font-weight: 700;
  color: var(--color-gold-light);
  letter-spacing: 0.03em;
}

.nav-brand-mark {
  width: 42px;
  height: 42px;
  display: grid;
  place-items: center;
  border-radius: var(--radius-full);
  background: radial-gradient(circle, var(--color-gold-light), var(--color-gold));
  color: var(--color-bg);
  font-size: 1.1rem;
  box-shadow: 0 0 24px rgba(245, 215, 122, 0.4);
}

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

.nav-link {
  color: var(--color-muted);
  font-size: 0.88rem;
  font-weight: 700;
  transition: color var(--duration-fast);
  position: relative;
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--color-gold-light);
  border-radius: 1px;
  transform: scaleX(0);
  transform-origin: right;
  transition: transform var(--duration-base) var(--ease-out);
}

.nav-link:hover,
.nav-link:focus-visible {
  color: var(--color-gold-light);
}

.nav-link:hover::after,
.nav-link:focus-visible::after {
  transform: scaleX(1);
  transform-origin: left;
}

/* CTA in nav */
.nav .btn {
  font-size: 0.82rem;
  min-height: 2.5rem;
  padding: 0.5rem 1.25rem;
}

/* Hamburger (mobile) */
.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 36px;
  height: 36px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
  z-index: calc(var(--z-nav) + 1);
}

.nav-toggle-bar {
  width: 100%;
  height: 2px;
  background: var(--color-gold-light);
  border-radius: 1px;
  transition: transform var(--duration-base) var(--ease-out),
              opacity var(--duration-fast);
}

/* Hamburger open state */
.nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(1) {
  transform: translateY(7px) 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(-7px) rotate(-45deg);
}

/* Mobile menu panel */
.nav-mobile {
  display: none;
  position: fixed;
  inset: 0;
  z-index: var(--z-nav);
  background: rgba(10, 6, 20, 0.96);
  backdrop-filter: blur(32px);
  -webkit-backdrop-filter: blur(32px);
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: var(--space-xl);
  opacity: 0;
  transition: opacity var(--duration-base);
}

.nav-mobile.is-open {
  display: flex;
  opacity: 1;
}

.nav-mobile .nav-link {
  font-size: 1.5rem;
  font-family: var(--font-heading);
}

/* ── Responsive ───────────────────────────────────────────── */
@media (max-width: 860px) {
  .nav-links {
    display: none;
  }

  .nav-toggle {
    display: flex;
  }
}