.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  padding: 1rem 0;
  transition: background var(--duration-fast), border-color var(--duration-fast);
  border-bottom: 1px solid transparent;
}

.nav--scrolled {
  background: rgba(10, 10, 15, 0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom-color: var(--border-color);
}

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

.nav__logo {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: -0.03em;
}

.nav__logo svg {
  width: 32px;
  height: 32px;
}

.nav__links {
  display: flex;
  align-items: center;
  gap: 2rem;
}

.nav__link {
  font-size: var(--fs-small);
  color: var(--text-secondary);
  transition: color var(--duration-fast);
}
.nav__link:hover { color: var(--text-primary); }

.nav__actions {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.lang-toggle {
  font-size: var(--fs-small);
  color: var(--text-secondary);
  padding: 0.4rem 0.75rem;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  transition: all var(--duration-fast);
  display: flex;
  align-items: center;
  gap: 0.35rem;
}
.lang-toggle:hover {
  color: var(--text-primary);
  border-color: var(--border-hover);
}
.lang-toggle svg { width: 14px; height: 14px; }

.nav__hamburger {
  display: none;
  width: 40px;
  height: 40px;
  align-items: center;
  justify-content: center;
}
.nav__hamburger svg { width: 24px; height: 24px; }

/* Mobile menu */
.mobile-menu {
  position: fixed;
  top: 0;
  right: 0;
  bottom: 0;
  width: min(320px, 85vw);
  background: var(--bg-secondary);
  border-left: 1px solid var(--border-color);
  padding: 5rem var(--container-padding) var(--space-lg);
  transform: translateX(100%);
  transition: transform var(--duration-normal) var(--ease-out-expo);
  z-index: 99;
  display: flex;
  flex-direction: column;
  gap: var(--space-lg);
}

.mobile-menu--open { transform: translateX(0); }

.mobile-menu .nav__link {
  font-size: 1.1rem;
  display: block;
  padding: 0.5rem 0;
}

.mobile-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.6);
  z-index: 98;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--duration-normal);
}
.mobile-overlay--visible {
  opacity: 1;
  pointer-events: auto;
}

@media (max-width: 768px) {
  .nav__links, .nav__actions .btn { display: none; }
  .nav__hamburger { display: flex; }
}