/* Navigation – Light Theme */
.nav {
  position: fixed; top: 0; left: 0; right: 0;
  height: var(--nav-height); z-index: 1000;
  transition: background var(--transition-base), box-shadow var(--transition-base), border-color var(--transition-base);
}
.nav.scrolled {
  background: rgba(255, 255, 255, 0.9);
  backdrop-filter: blur(20px); -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--color-border);
  box-shadow: var(--shadow-sm);
}
/* Solid white bar when mobile menu is open (no backdrop-filter needed) */
.nav.menu-open {
  background: #ffffff !important;
  backdrop-filter: none !important; -webkit-backdrop-filter: none !important;
  border-bottom: 1px solid var(--color-border);
  box-shadow: var(--shadow-sm);
}

.nav-inner {
  max-width: var(--max-width); margin: 0 auto; padding: 0 var(--space-xl);
  height: 100%; display: flex; align-items: center; justify-content: space-between;
}
.nav-logo {
  display: flex; align-items: center; gap: var(--space-sm);
  text-decoration: none;
}
.nav-logo:hover { opacity: 0.85; }
.nav-logo img { height: 32px; width: auto; }
.nav-logo .logo-icon {
  width: 36px; height: 36px; border-radius: var(--radius-sm);
  background: linear-gradient(135deg, var(--color-accent), var(--color-cyan));
  display: flex; align-items: center; justify-content: center;
  font-weight: 800; font-size: var(--text-sm); color: white;
}
.nav-logo span { letter-spacing: -0.02em; font-size: var(--text-lg); font-weight: 700; color: var(--color-text-primary); }
.nav-links { display: flex; align-items: center; gap: var(--space-xs); }
.nav-links a {
  padding: 8px 16px; font-size: var(--text-sm); font-weight: 500;
  color: var(--color-text-secondary); border-radius: var(--radius-sm);
  transition: all var(--transition-fast); text-decoration: none;
}
.nav-links a:hover { color: var(--color-text-primary); background: var(--color-bg-secondary); }
.nav-links a.active { color: var(--color-accent); }
.nav-cta { margin-left: var(--space-md); }

.nav-toggle { display: none; flex-direction: column; gap: 5px; padding: 8px; cursor: pointer; z-index: 1002; }
.nav-toggle span { display: block; width: 22px; height: 2px; background: var(--color-text-primary); border-radius: 2px; transition: all var(--transition-fast); }
.nav-toggle.open span:nth-child(1) { transform: rotate(45deg) translate(5px, 5px); }
.nav-toggle.open span:nth-child(2) { opacity: 0; }
.nav-toggle.open span:nth-child(3) { transform: rotate(-45deg) translate(5px, -5px); }

/* Dark overlay behind mobile menu */
.nav-mobile-overlay {
  display: none; position: fixed; inset: 0;
  background: rgba(0, 0, 0, 0.4);
  z-index: 1001;
}
.nav-mobile-overlay.open { display: block; }

/* Mobile menu panel – positioned OUTSIDE nav to avoid backdrop-filter issues */
.nav-mobile {
  display: none; position: fixed;
  top: var(--nav-height); left: 0; right: 0; bottom: 0;
  background: #ffffff;
  z-index: 1002;
  padding: var(--space-2xl);
  flex-direction: column; gap: var(--space-sm);
  overflow-y: auto;
}
.nav-mobile.open { display: flex; }
.nav-mobile a {
  font-size: var(--text-xl); font-weight: 600; color: var(--color-text-secondary);
  padding: var(--space-md) 0; border-bottom: 1px solid var(--color-border);
  text-decoration: none; transition: color var(--transition-fast);
}
.nav-mobile a:hover, .nav-mobile a.active { color: var(--color-accent); }

@media (max-width: 768px) {
  .nav-links, .nav-cta { display: none; }
  .nav-toggle { display: flex; }
}