/* ============================================================
   Synontech — Navigation
   ============================================================ */

nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem 3rem;
  background: rgba(255, 255, 255, 0.85);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-border-gray);
  transition: all 0.3s ease;
}

.nav-logo {
  display: flex;
  align-items: center;
  text-decoration: none;
}

.nav-logo-img {
  height: 28px;
  width: auto;
  transition: opacity 0.3s ease;
}

.nav-logo:hover .nav-logo-img {
  opacity: 0.8;
}

.nav-links {
  display: flex;
  gap: 2.5rem;
  list-style: none;
}

.nav-links a {
  color: var(--color-text-gray);
  text-decoration: none;
  font-family: var(--font-primary);
  font-weight: 500;
  font-size: 0.95rem;
  transition: color 0.2s ease;
}

.nav-links a:hover {
  color: var(--color-deep-navy);
}

.nav-cta {
  background: var(--color-deep-navy);
  color: var(--color-white);
  padding: 0.6rem 1.25rem;
  border-radius: var(--radius-md);
  text-decoration: none;
  font-family: var(--font-primary);
  font-weight: 500;
  font-size: 0.95rem;
  transition: background 0.2s ease, transform 0.2s ease;
}

.nav-cta:hover {
  background: var(--primary);
  transform: translateY(-1px);
}

/* ── Hamburger (mobile only) ── */
.nav-hamburger {
  display: none;
  background: transparent;
  border: none;
  color: var(--color-deep-navy);
  font-size: 1.5rem;
  cursor: pointer;
}

.nav-links li.mobile-only {
  display: none;
}

/* ── Mobile breakpoint ── */
@media (max-width: 768px) {
  nav {
    padding: 1rem 1.5rem;
  }

  .desktop-only {
    display: none !important;
  }

  .nav-cta {
    display: none;
  }

  .nav-hamburger {
    display: block;
  }

  .nav-links {
    display: none;
    width: 100%;
    flex-direction: column;
    gap: 0;
    padding: 1rem 0;
    position: absolute;
    top: 100%;
    left: 0;
    background: var(--color-white);
    border-bottom: 1px solid var(--color-border-gray);
  }

  .nav-links li.mobile-only {
    display: block;
  }

  .nav-links.open {
    display: flex;
  }

  .nav-links li a {
    display: block;
    padding: 0.8rem 1.5rem;
  }
}