/* ============================================
   NAVIGATION — Frosted Glass Navbar
   ============================================ */

.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: var(--z-nav);
  padding: var(--space-4) var(--space-8);
  transition: all var(--duration-slow) var(--ease-out);
}

.nav::before {
  content: '';
  position: absolute;
  inset: 0;
  background: rgba(4, 8, 20, 0.6);
  backdrop-filter: blur(var(--glass-blur-nav));
  -webkit-backdrop-filter: blur(var(--glass-blur-nav));
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
  opacity: 0;
  transition: opacity var(--duration-slow) var(--ease-out);
}

.nav.scrolled::before {
  opacity: 1;
}

.nav__inner {
  max-width: 1400px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  position: relative;
  z-index: 1;
}

/* ── Logo ── */
.nav__logo {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  font-family: var(--font-display);
  font-size: 1.4rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--text-primary);
}

.nav__logo-icon {
  width: 36px;
  height: 36px;
  background: linear-gradient(135deg, var(--blue-azure), var(--blue-cyan));
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  font-size: 1.1rem;
  color: white;
  box-shadow: 0 0 20px rgba(0, 163, 255, 0.3);
  position: relative;
}

.nav__logo-icon::after {
  content: '';
  position: absolute;
  inset: -2px;
  border-radius: var(--radius-md);
  background: linear-gradient(135deg, var(--blue-azure), var(--blue-cyan));
  z-index: -1;
  opacity: 0.3;
  filter: blur(8px);
}

/* ── Nav Links ── */
.nav__links {
  display: flex;
  align-items: center;
  gap: var(--space-1);
}

.nav__link {
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--text-secondary);
  padding: var(--space-2) var(--space-4);
  border-radius: var(--radius-sm);
  transition: all var(--duration-normal) var(--ease-out);
  position: relative;
}

.nav__link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 0;
  height: 2px;
  background: var(--blue-electric);
  border-radius: 1px;
  transition: width var(--duration-normal) var(--ease-out);
  box-shadow: 0 0 8px rgba(0, 163, 255, 0.4);
}

.nav__link:hover,
.nav__link.active {
  color: var(--text-primary);
}

.nav__link:hover::after,
.nav__link.active::after {
  width: 60%;
}

/* ── Nav Actions ── */
.nav__actions {
  display: flex;
  align-items: center;
  gap: var(--space-4);
}

.nav__cta {
  font-size: var(--text-sm);
  font-weight: 600;
  padding: var(--space-2) var(--space-5);
  background: linear-gradient(135deg, var(--blue-azure), var(--blue-electric));
  color: white;
  border-radius: var(--radius-full);
  transition: all var(--duration-normal) var(--ease-out);
  box-shadow: 0 0 15px rgba(0, 163, 255, 0.25);
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
}

.nav__cta:hover {
  box-shadow: 0 0 25px rgba(0, 163, 255, 0.4);
  transform: translateY(-1px);
}

/* ── Mobile Menu ── */
.nav__mobile-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: var(--space-2);
}

.nav__mobile-toggle span {
  width: 22px;
  height: 2px;
  background: var(--text-secondary);
  border-radius: 2px;
  transition: all var(--duration-normal) var(--ease-out);
}

@media (max-width: 900px) {
  .nav__links {
    display: none;
  }

  .nav__mobile-toggle {
    display: flex;
  }

  .nav__signin {
    display: none;
  }

  /* Hide Book a Demo CTA in overlay by default — shown only when open */
  .nav__cta--mobile {
    display: none;
  }

  .nav.mobile-open .nav__cta--mobile {
    display: inline-flex;
    margin-top: var(--space-8);
    font-size: var(--text-base);
    padding: var(--space-4) var(--space-8);
  }

  /* ── Open state — full-screen overlay ── */
  .nav.mobile-open {
    height: 100vh;
    height: 100dvh;
  }

  .nav.mobile-open::before {
    opacity: 1;
    background: rgba(4, 8, 20, 0.97);
    backdrop-filter: blur(24px);
    -webkit-backdrop-filter: blur(24px);
  }

  .nav.mobile-open .nav__links {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 0;
    position: fixed;
    inset: 0;
    z-index: 999;
    padding: var(--space-24) var(--space-6) var(--space-12);
  }

  .nav.mobile-open .nav__link {
    font-size: var(--text-xl);
    font-weight: 600;
    padding: var(--space-5) 0;
    width: 100%;
    text-align: center;
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
    color: var(--text-secondary);
  }

  .nav.mobile-open .nav__link:last-child {
    border-bottom: none;
  }

@media (max-width: 480px) {
  .nav__actions {
    display: none;
  }
}

  /* Burger → X */
  .nav.mobile-open .nav__mobile-toggle {
    position: relative;
    z-index: 1000;
  }

  .nav.mobile-open .nav__mobile-toggle span:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
    background: var(--text-primary);
  }

  .nav.mobile-open .nav__mobile-toggle span:nth-child(2) {
    opacity: 0;
    transform: scaleX(0);
  }

  .nav.mobile-open .nav__mobile-toggle span:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
    background: var(--text-primary);
  }
}