/* =========================================================
   NovaAI — Navigation
   ========================================================= */

.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  padding: 16px 0;
  transition: background 0.3s ease, box-shadow 0.3s ease, padding 0.3s ease;
}

.nav.is-scrolled {
  background: rgba(2, 6, 23, 0.78);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  box-shadow: 0 1px 0 var(--border);
  padding: 12px 0;
}

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

.nav__logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-heading);
  font-size: 22px;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--text);
}

.nav__logo-mark {
  width: 32px;
  height: 32px;
  border-radius: 9px;
  overflow: hidden;
  display: flex;
  box-shadow: 0 0 16px var(--primary-glow);
}

.nav__logo-mark img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.nav__links {
  display: none;
  align-items: center;
  gap: 32px;
}

.nav__links a {
  font-size: 14px;
  font-weight: 500;
  color: var(--text-muted);
  transition: color 0.2s ease;
}

.nav__links a:hover {
  color: var(--text);
}

.nav__actions {
  display: flex;
  align-items: center;
  gap: 12px;
}

.lang-toggle {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 6px 10px;
  font-size: 13px;
  font-weight: 600;
  color: var(--text-muted);
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  transition: color 0.2s ease, border-color 0.2s ease;
  min-height: 44px;
}

.lang-toggle:hover {
  color: var(--text);
  border-color: var(--border-strong);
}

.lang-toggle i {
  font-size: 14px;
}

.nav__cta {
  display: none;
}

.nav__menu-btn {
  width: 44px;
  height: 44px;
  display: grid;
  place-items: center;
  color: var(--text);
  border-radius: var(--radius-sm);
}

.nav__menu-btn i {
  font-size: 24px;
}

.nav__menu-btn:hover {
  background: var(--surface);
}

/* Mobile menu */
.nav__mobile {
  position: fixed;
  inset: 0;
  z-index: 110;
  background: rgba(2, 6, 23, 0.96);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 32px;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s ease;
}

.nav__mobile.is-open {
  opacity: 1;
  pointer-events: auto;
}

.nav__mobile a {
  font-family: var(--font-heading);
  font-size: 28px;
  font-weight: 600;
  color: var(--text);
}

.nav__mobile a:hover {
  color: var(--primary);
}

.nav__mobile-close {
  position: absolute;
  top: 20px;
  right: 24px;
  width: 44px;
  height: 44px;
  display: grid;
  place-items: center;
  color: var(--text);
}

.nav__mobile-close i {
  font-size: 26px;
}

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

  .nav__menu-btn {
    display: none;
  }
}

@media (min-width: 1024px) {
  .nav__cta {
    display: inline-flex;
  }
}