.navigation {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  transition: all var(--transition-fast);
  padding: 16px 0;
  background: rgba(10, 10, 10, 0.6);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid transparent;
}

.navigation.scrolled {
  padding: 12px 0;
  border-bottom: 1px solid var(--glass-border);
  background: rgba(10, 10, 10, 0.85);
}

.nav-container {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo-text {
  font-size: 1.2rem;
  font-weight: var(--font-weight-bold);
  letter-spacing: -0.02em;
}

/* Desktop nav links */
.nav-links {
  display: flex;
  gap: 32px;
  align-items: center;
}

.nav-link {
  font-size: 0.9rem;
  font-weight: var(--font-weight-normal);
  color: var(--text-secondary);
  transition: color var(--transition-fast);
  position: relative;
}

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

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

.nav-link.active::after {
  content: '';
  position: absolute;
  bottom: -6px;
  left: 0;
  width: 100%;
  height: 2px;
  background: var(--accent-color);
  border-radius: 1px;
}

/* Hamburger — hidden on desktop, shown on mobile */
.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: transparent;
  border: none;
  cursor: pointer;
  padding: 8px;
}

.hamburger:focus-visible,
.nav-link:focus-visible,
.nav-mobile-link:focus-visible,
.logo:focus-visible {
  outline: 2px solid var(--accent-color);
  outline-offset: 4px;
}

.hamburger span {
  display: block;
  width: 24px;
  height: 2px;
  background-color: var(--text-primary);
  transition: all var(--transition-fast);
}

.hamburger.active span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.hamburger.active span:nth-child(2) { opacity: 0; }
.hamburger.active span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* Mobile dropdown */
.nav-mobile {
  display: none;
  flex-direction: column;
  background: rgba(10, 10, 10, 0.95);
  backdrop-filter: blur(15px);
  border-bottom: 1px solid var(--glass-border);
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease, padding 0.3s ease;
}

.nav-mobile.open {
  max-height: 400px;
  padding: 16px 0;
}

.nav-mobile-link {
  display: block;
  padding: 12px 24px;
  color: var(--text-secondary);
  font-size: 1rem;
  transition: color var(--transition-fast), background var(--transition-fast);
}

.nav-mobile-link:hover,
.nav-mobile-link.active {
  color: var(--accent-color);
  background: rgba(var(--accent-color-rgb), 0.05);
}

/* Responsive: show hamburger + mobile menu on small screens */
@media (max-width: 900px) {
  .nav-links {
    display: none;
  }
  .hamburger {
    display: flex;
  }
  .nav-mobile {
    display: flex;
  }
}