.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--nav-height);
  z-index: var(--z-nav);
  transition: all var(--transition-base);
}

.nav--scrolled {
  background: var(--glass-bg-darker);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--glass-border);
}

.nav--hidden {
  transform: translateY(-100%);
}

.nav__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--container-padding);
}

.nav__logo {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  font-size: var(--text-lg);
  font-weight: var(--weight-bold);
  color: var(--text-primary);
  text-decoration: none;
  z-index: calc(var(--z-nav) + 1);
}

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

.nav__logo svg {
  width: 2rem;
  height: 2rem;
}

.nav__links {
  display: none;
  align-items: center;
  gap: var(--space-xs);
}

@media (min-width: 768px) {
  .nav__links {
    display: flex;
  }
}

.nav__link {
  padding: 0.5rem 0.875rem;
  font-size: var(--text-sm);
  font-weight: var(--weight-medium);
  color: var(--text-secondary);
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
  text-decoration: none;
}

.nav__link:hover {
  color: var(--text-primary);
  background: rgba(255, 255, 255, 0.05);
}

.nav__link--active {
  color: var(--accent-light);
}

.nav__cta {
  display: none;
}

@media (min-width: 768px) {
  .nav__cta {
    display: inline-flex;
  }
}

/* Hamburger */
.hamburger {
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 2.25rem;
  height: 2.25rem;
  padding: 0.375rem;
  cursor: pointer;
  z-index: calc(var(--z-nav) + 1);
}

@media (min-width: 768px) {
  .hamburger {
    display: none;
  }
}

.hamburger__line {
  width: 100%;
  height: 2px;
  background: var(--text-primary);
  border-radius: 2px;
  transition: all var(--transition-base);
  transform-origin: center;
}

.hamburger--open .hamburger__line:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}

.hamburger--open .hamburger__line:nth-child(2) {
  opacity: 0;
}

.hamburger--open .hamburger__line:nth-child(3) {
  transform: rotate(-45deg) translate(5px, -5px);
}

/* Mobile menu */
.mobile-menu {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: var(--z-mobile-menu);
  background: var(--glass-bg-darker);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-base);
}

.mobile-menu--open {
  opacity: 1;
  visibility: visible;
}

.mobile-menu__link {
  padding: 0.875rem 2rem;
  font-size: var(--text-xl);
  font-weight: var(--weight-medium);
  color: var(--text-secondary);
  text-decoration: none;
  transition: color var(--transition-fast);
  border-radius: var(--radius-lg);
}

.mobile-menu__link:hover,
.mobile-menu__link--active {
  color: var(--accent-light);
}

.mobile-menu__cta {
  margin-top: var(--space-xl);
}

body.menu-open {
  overflow: hidden;
}