/* ============================================
   ALIEN-OPERATIONS.AI — Navigation
   ============================================ */

.site-nav {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: var(--z-nav);
  padding: 1rem var(--section-pad-x);
  background: rgba(10, 10, 10, 0.8);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid rgba(57, 255, 20, 0.15);
  transition: background 0.3s ease, border-color 0.3s ease;
}

@media (min-width: 1024px) {
  .site-nav {
    width: calc(100% - var(--sidebar-width));
  }
}

.site-nav.scrolled {
  background: rgba(10, 10, 10, 0.95);
  border-bottom-color: rgba(57, 255, 20, 0.3);
}

.nav-inner {
  max-width: var(--content-max);
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

/* Logo */
.nav-logo {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  cursor: pointer;
}

.nav-logo-icon {
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.nav-logo-icon svg {
  width: 32px;
  height: 32px;
  fill: var(--alien-green);
  filter: drop-shadow(0 0 6px var(--glow-green-mid));
  transition: filter 0.3s ease;
}

.nav-logo:hover .nav-logo-icon svg {
  filter: drop-shadow(0 0 12px var(--glow-green-intense));
}

.nav-logo-text {
  display: flex;
  flex-direction: column;
}

.nav-logo-name {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.1rem;
  letter-spacing: 0.15em;
  color: #fff;
  line-height: 1;
  text-transform: uppercase;
}

.nav-logo-sub {
  font-family: var(--font-mono);
  font-size: 0.6rem;
  color: var(--scan-teal);
  letter-spacing: 0.3em;
  text-transform: uppercase;
  margin-top: 0.2rem;
}

/* Desktop links */
.nav-links {
  display: none;
  align-items: center;
  gap: 2rem;
}

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

.nav-links a {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--text-dim);
  transition: color 0.3s ease;
}

.nav-links a:hover {
  color: var(--alien-green);
}

.nav-cta {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--alien-green);
  padding: 0.5rem 1.25rem;
  border: 1px solid rgba(57, 255, 20, 0.3);
  border-radius: 50px;
  background: rgba(57, 255, 20, 0.05);
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  transition: all 0.3s ease;
  box-shadow: 0 0 15px rgba(57,255,20,0.1);
}

.nav-cta:hover {
  background: rgba(57, 255, 20, 0.15);
  box-shadow: 0 0 25px rgba(57,255,20,0.3);
  color: #fff;
  transform: translateY(-1px);
}

/* Hamburger */
.nav-hamburger {
  display: flex;
  flex-direction: column;
  gap: 5px;
  padding: 0.5rem;
  cursor: pointer;
}

@media (min-width: 768px) {
  .nav-hamburger { display: none; }
}

.nav-hamburger span {
  display: block;
  height: 2px;
  background: var(--alien-green);
  transition: all 0.3s ease;
}

.nav-hamburger span:nth-child(1) { width: 24px; }
.nav-hamburger span:nth-child(2) { width: 24px; }
.nav-hamburger span:nth-child(3) { width: 16px; }

.nav-hamburger.active span:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}
.nav-hamburger.active span:nth-child(2) {
  opacity: 0;
}
.nav-hamburger.active span:nth-child(3) {
  width: 24px;
  transform: rotate(-45deg) translate(5px, -5px);
}

/* Mobile overlay */
.mobile-nav-overlay {
  position: fixed;
  inset: 0;
  z-index: calc(var(--z-nav) - 1);
  background: var(--space-black);
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 2.5rem;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.4s ease;
}

.mobile-nav-overlay.active {
  opacity: 1;
  pointer-events: auto;
}

.mobile-nav-overlay a {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 2rem;
  text-transform: uppercase;
  color: var(--alien-green);
  letter-spacing: 0.1em;
  transition: text-shadow 0.3s ease;
}

.mobile-nav-overlay a:hover {
  text-shadow: 0 0 20px var(--glow-green-mid);
}

/* Close label for mobile */
.mobile-nav-close {
  position: absolute;
  top: 1.5rem;
  right: 1.5rem;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--alien-green);
  letter-spacing: 0.2em;
  cursor: pointer;
  padding: 0.5rem;
}