/* =========================================================
   NEXURION SYSTEMS — Navigation
   ========================================================= */

.nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  height: var(--nav-h);
  z-index: 1000;
  transition: background 0.4s ease, border-color 0.4s ease;
  border-bottom: 1px solid transparent;
}

.nav.scrolled {
  background: rgba(4, 6, 15, 0.92);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom-color: var(--c-border);
}

.nav-inner {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 2rem;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

/* Logo */
.nav-logo {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  text-decoration: none;
}

.nav-logo img {
  height: 36px;
  width: auto;
}

/* Desktop links */
.nav-links {
  display: flex;
  align-items: center;
  gap: 0.25rem;
}

.nav-links a {
  font-family: var(--f-display);
  font-size: 0.85rem;
  font-weight: 500;
  letter-spacing: 0.04em;
  color: var(--c-muted);
  padding: 0.5rem 0.9rem;
  border-radius: var(--radius-sm);
  transition: var(--transition);
  text-transform: uppercase;
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--c-white);
  background: rgba(255,255,255,0.05);
}

.nav-links a.active {
  color: var(--c-blue-bright);
}

/* CTA button */
.nav-cta {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

/* Hamburger */
.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 8px;
  cursor: pointer;
}

.nav-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--c-white);
  border-radius: 2px;
  transition: var(--transition);
}

/* Mobile menu */
.nav-mobile {
  display: none;
  position: fixed;
  top: var(--nav-h);
  left: 0; right: 0;
  background: rgba(4, 6, 15, 0.98);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--c-border);
  padding: 1.5rem 2rem 2rem;
  flex-direction: column;
  gap: 0.5rem;
  z-index: 999;
}

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

.nav-mobile a {
  font-family: var(--f-display);
  font-size: 1rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--c-muted);
  padding: 0.75rem 0;
  border-bottom: 1px solid var(--c-border);
  transition: var(--transition);
}

.nav-mobile a:hover { color: var(--c-blue-bright); }

.nav-mobile .btn {
  margin-top: 1rem;
  justify-content: center;
}

/* Active toggle states */
.nav-toggle.open span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}
.nav-toggle.open span:nth-child(2) { opacity: 0; }
.nav-toggle.open span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

@media (max-width: 900px) {
  .nav-links  { display: none; }
  .nav-cta .btn { display: none; }
  .nav-toggle { display: flex; }
}

/* ── Mobile nav full improvements ────────────────────────── */
@media (max-width: 900px) {
  .nav-mobile {
    max-height: calc(100vh - var(--nav-h));
    overflow-y: auto;
    -webkit-overflow-scrolling: touch;
  }
  .nav-mobile a {
    font-size: 1.1rem;
    padding: 1rem 0;
  }
}

@media (max-width: 480px) {
  .nav-inner { padding: 0 1rem; }
  .nav-logo img { height: 28px; }
  .nav-mobile { padding: 1.25rem 1rem 2rem; }
}