/* ═══════════════════════════════════════════════════════════
   EFP Navigation — Premium Light Theme
   ═══════════════════════════════════════════════════════════ */

#nav {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  background: rgba(255,255,255,0.95);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--gray-200);
  transition: all var(--transition-base);
  height: var(--nav-height);
}

#nav.scrolled {
  box-shadow: 0 4px 20px rgba(0,0,0,0.06);
  background: rgba(255,255,255,0.98);
}

/* Hero page: transparent nav initially */
#nav.nav-transparent {
  background: transparent;
  border-bottom-color: transparent;
  backdrop-filter: none;
}
#nav.nav-transparent:not(.scrolled) .nav-logo img { filter: brightness(0) invert(1); }
#nav.nav-transparent:not(.scrolled) .nav-links a { color: var(--white); }
#nav.nav-transparent:not(.scrolled) .nav-phone { color: var(--white); }
#nav.nav-transparent:not(.scrolled) .nav-toggle span { background: var(--white); }

/* Transparent → solid on scroll */
#nav.nav-transparent.scrolled {
  background: rgba(255,255,255,0.98);
  border-bottom: 1px solid var(--gray-200);
  backdrop-filter: blur(12px);
}

#nav > .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
  gap: var(--space-lg);
}

.nav-logo img {
  height: 36px;
  width: auto;
  transition: filter var(--transition-base);
}

.nav-links {
  display: flex;
  gap: var(--space-xl);
}

.nav-links a {
  font-family: var(--font-heading);
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--gray-700);
  position: relative;
  padding: 4px 0;
  transition: color var(--transition-fast);
}

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 50%;
  width: 0;
  height: 2px;
  background: var(--accent);
  transition: all var(--transition-base);
  transform: translateX(-50%);
  border-radius: 1px;
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--primary);
}

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

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

.nav-phone {
  font-family: var(--font-heading);
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--gray-700);
  letter-spacing: 0.02em;
  transition: color var(--transition-fast);
}

.nav-phone:hover { color: var(--accent); }

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  padding: 4px;
}

.nav-toggle span {
  width: 22px;
  height: 2px;
  background: var(--gray-700);
  transition: all var(--transition-base);
  border-radius: 1px;
}

/* ── Mobile ──────────────────────────────────────────────── */
@media (max-width: 768px) {
  .nav-toggle { display: flex; }
  .nav-phone { display: none; }

  .nav-links {
    position: fixed;
    top: var(--nav-height);
    left: 0;
    width: 100%;
    flex-direction: column;
    background: var(--white);
    border-bottom: 1px solid var(--gray-200);
    padding: var(--space-lg);
    gap: var(--space-md);
    transform: translateY(-120%);
    opacity: 0;
    transition: transform 0.3s cubic-bezier(0.16, 1, 0.3, 1), opacity 0.3s ease;
    box-shadow: var(--shadow-xl);
  }

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

  /* Override transparent colors when mobile menu is open */
  #nav.nav-transparent .nav-links.open a { color: var(--gray-700); }
  #nav.nav-transparent .nav-links.open a:hover { color: var(--primary); }

  .nav-links a {
    font-size: 1rem;
    padding: var(--space-sm) 0;
  }

  .nav-links a::after {
    left: 0;
    transform: none;
  }

  .nav-cta .btn { display: none; }
}

@media (max-width: 480px) {
  .nav-logo img { height: 30px; }
}