/* ──────────────────────────────────────────────────────────
   NAVIGATION — Operating System HUD Navigation
   Frosted OS HUD aesthetic with real-time telemetry panels.
   ───────────────────────────────────────────────────────── */

.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  padding: 24px var(--safe);
  transition: transform var(--dur-base) var(--ease-out),
              background var(--dur-base) var(--ease-out),
              padding var(--dur-base) var(--ease-out),
              border-color var(--dur-base) var(--ease-out);
  background: transparent;
  border-bottom: 1px solid transparent;
}

.navbar.scrolled {
  background: var(--glass-nav);
  backdrop-filter: blur(var(--glass-blur));
  -webkit-backdrop-filter: blur(var(--glass-blur));
  border-bottom: 1px solid var(--border-subtle);
  padding: 14px var(--safe);
  box-shadow: 0 10px 40px rgba(0, 0, 0, 0.2);
}

.navbar.hidden {
  transform: translateY(-100%);
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: 1800px;
  margin: 0 auto;
  height: 48px;
  position: relative;
}

/* ── Logo ── */
.nav-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  flex-shrink: 0;
}

.nav-logo-text {
  font-family: var(--font-display);
  font-size: 20px;
  font-weight: 600;
  color: var(--text-primary);
  letter-spacing: -0.02em;
}

/* ── OS HUD Telemetry Panel ── */
.nav-hud-meta {
  display: none;
}

.hud-tag {
  color: var(--accent);
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.hud-time {
  color: var(--text-secondary);
}

.hud-separator {
  opacity: 0.3;
}

/* ── Nav Links ── */
.nav-links {
  position: absolute;
  left: 55%;
  top: 50%;
  transform: translate(-50%, -50%);
  display: flex;
  align-items: center;
  gap: 4px;
  list-style: none;
}

.nav-link {
  font-family: var(--font-ui);
  font-size: 13px;
  font-weight: 500;
  color: var(--text-secondary);
  padding: 6px 14px;
  border-radius: var(--r-full);
  transition: color var(--dur-fast) var(--ease-out),
              background var(--dur-fast) var(--ease-out),
              border-color var(--dur-fast) var(--ease-out);
  cursor: pointer;
  text-decoration: none;
  border: 1px solid transparent;
}

.nav-link:hover {
  color: var(--text-primary);
  background: rgba(0, 0, 0, 0.05);
}

.nav-link.active {
  color: var(--text-primary);
  background: rgba(0, 0, 0, 0.08);
  border-color: rgba(255, 255, 255, 0.06);
}

/* ── CTA Button ── */
.nav-cta {
  font-family: var(--font-ui);
  font-size: 13px;
  font-weight: 600;
  color: #ffffff;
  background: var(--text-primary);
  padding: 10px 24px;
  border-radius: var(--r-md);
  border: 1px solid var(--text-primary);
  cursor: pointer;
  transition: background var(--dur-fast) var(--ease-out),
              border-color var(--dur-fast) var(--ease-out),
              color var(--dur-fast) var(--ease-out),
              transform var(--dur-fast) var(--ease-out),
              box-shadow var(--dur-fast) var(--ease-out);
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 8px;
}
 
.nav-cta:hover {
  background: var(--grad-opus);
  border-color: transparent;
  color: #ffffff;
  transform: translateY(-1px);
  box-shadow: 0 4px 20px var(--accent-glow-40);
}

/* ── Mobile Menu Toggle ── */
.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  background: none;
  border: none;
  padding: 8px;
}

.nav-toggle span {
  width: 22px;
  height: 2px;
  background: var(--text-primary);
  border-radius: 2px;
  transition: transform var(--dur-fast) var(--ease-out),
              opacity var(--dur-fast) var(--ease-out);
}

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

/* ── Mobile ── */
@media (max-width: 1024px) {
  .nav-hud-meta {
    display: none; /* Clear space on mobile and tablet viewport */
  }
}

@media (max-width: 768px) {
  .nav-links {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    transform: none;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: 20px;
    background: rgba(255, 255, 255, 0.98); /* Matching the Void Black canvas */
    backdrop-filter: blur(30px);
    -webkit-backdrop-filter: blur(30px);
    opacity: 0;
    pointer-events: none;
    transition: opacity var(--dur-base) var(--ease-out);
    z-index: 99;
    border-bottom: none;
  }

  .nav-links.open {
    opacity: 1;
    pointer-events: all;
  }

  .nav-link {
    font-size: 18px;
    padding: 12px 28px;
    color: var(--text-primary);
  }
  
  .nav-link:hover {
    background: rgba(0, 0, 0, 0.05);
  }

  .nav-toggle { display: flex; z-index: 101; }

  .nav-cta-desktop { display: none; }
}

@media (min-width: 769px) {
  .nav-links li:last-child {
    display: none;
  }
}