/* ==========================================================================
   COMPONENT: NAVIGATION BAR & TELEMETRY HEADER
   Standard: antislop-human + industrial-brutalist-ui
   - High contrast 1px bordered header
   - Real destinations only (R-24)
   - Accessible keyboard-operable mobile drawer (R-32)
   ========================================================================== */

.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background-color: var(--color-substrate);
  border-bottom: var(--border-thick);
}

.nav-telemetry-bar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--space-2xs) var(--space-md);
  background-color: var(--color-ink);
  color: #FFFFFF;
  font-family: var(--font-telemetry);
  font-size: var(--type-micro);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.nav-main {
  display: flex;
  align-items: stretch;
  justify-content: space-between;
  min-height: 64px;
}

.brand-mark {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  padding: var(--space-xs) var(--space-md);
  border-right: var(--border-line);
}

.brand-symbol {
  width: 44px;
  height: 44px;
  background-color: var(--color-ink);
  color: #FFFFFF;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-macro);
  font-size: 1.5rem;
  line-height: 1;
  overflow: hidden;
}

.brand-symbol img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.brand-text {
  display: flex;
  flex-direction: column;
}

.brand-name {
  font-family: var(--font-macro);
  font-size: 1.25rem;
  letter-spacing: -0.02em;
  line-height: 1;
  text-transform: uppercase;
}

.brand-sub {
  font-family: var(--font-telemetry);
  font-size: var(--type-micro);
  color: var(--color-ink-muted);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-top: 2px;
}

.nav-links {
  display: none;
}

@media (min-width: 900px) {
  .nav-links {
    display: flex;
    align-items: stretch;
  }
}

.nav-link {
  display: flex;
  align-items: center;
  padding: 0 var(--space-lg);
  border-left: var(--border-line);
  font-family: var(--font-telemetry);
  font-size: var(--type-telemetry);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  transition: background-color 0.15s ease, color 0.15s ease;
  min-height: var(--min-tap);
}

.nav-link:hover, .nav-link.active {
  background-color: var(--color-ink);
  color: #FFFFFF;
}

.nav-cta {
  display: none;
  background-color: var(--color-hazard);
  color: #FFFFFF;
  font-family: var(--font-telemetry);
  font-size: var(--type-telemetry);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  align-items: center;
  padding: 0 var(--space-lg);
  border-left: var(--border-line);
  transition: background-color 0.15s ease;
}

.nav-cta:hover {
  background-color: var(--color-hazard-hover);
}

@media (min-width: 900px) {
  .nav-cta {
    display: flex;
  }
}

/* Mobile Menu Button */
.menu-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-md);
  border-left: var(--border-line);
  font-family: var(--font-telemetry);
  font-weight: 700;
  font-size: var(--type-telemetry);
  text-transform: uppercase;
}

@media (min-width: 900px) {
  .menu-toggle {
    display: none;
  }
}

/* Mobile Drawer Overlay */
.mobile-drawer {
  display: none;
  position: fixed;
  inset: 0;
  top: 96px;
  background-color: var(--color-substrate);
  border-top: var(--border-thick);
  z-index: 999;
  flex-direction: column;
  padding: var(--space-md);
  overflow-y: auto;
}

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

.mobile-drawer .nav-link {
  border: var(--border-line);
  margin-bottom: var(--space-xs);
  padding: var(--space-md);
}

.mobile-drawer .nav-cta {
  display: flex;
  margin-top: var(--space-md);
  padding: var(--space-md);
  justify-content: center;
}