/**
 * Navigation Component
 * Company site header and navigation
 */

.site-header {
  position: sticky;
  top: 0;
  background: rgba(10, 14, 20, 0.92);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid rgba(49, 120, 198, 0.1);
  padding: var(--space-3) 0;
  z-index: 50;
}

.nav-container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--space-4);
}

.site-logo {
  font-family: var(--font-code);
  font-size: var(--text-xl);
  font-weight: 700;
  color: var(--frost-white);
  text-decoration: none;
  display: flex;
  align-items: center;
  letter-spacing: -0.01em;
  transition: opacity var(--duration-fast) var(--ease-out);
}

.site-logo:hover {
  opacity: 0.75;
}

.site-logo .logo-bracket { color: var(--comment-gray); }
.site-logo .logo-text    { color: var(--frost-white); }
.site-logo .logo-accent  { color: var(--brand); }

/* Desktop nav */
.site-nav {
  display: flex;
  gap: var(--space-1);
  align-items: center;
}

.nav-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--frost-tertiary);
  font-size: var(--text-sm);
  font-weight: 500;
  padding: 6px var(--space-2);
  border-radius: var(--radius-md);
  letter-spacing: 0.01em;
  text-decoration: none;
  transition: color var(--duration-fast) var(--ease-out),
              background var(--duration-fast) var(--ease-out);
}

.nav-link:hover {
  color: var(--frost-white);
  background: rgba(230, 232, 235, 0.06);
}

.nav-link:focus {
  outline: 2px solid var(--brand);
  outline-offset: 2px;
}

/* Mobile toggle button */
.mobile-menu-toggle {
  display: none;
  background: none;
  border: 1px solid rgba(230, 232, 235, 0.12);
  border-radius: var(--radius-md);
  color: var(--frost-white);
  cursor: pointer;
  padding: 8px;
  line-height: 0;
  transition: border-color var(--duration-fast) var(--ease-out),
              background var(--duration-fast) var(--ease-out);
}

.mobile-menu-toggle:hover {
  background: rgba(230, 232, 235, 0.06);
  border-color: rgba(230, 232, 235, 0.2);
}

.mobile-menu-toggle .icon-close {
  display: none;
}

.mobile-menu-toggle[aria-expanded="true"] .icon-menu {
  display: none;
}

.mobile-menu-toggle[aria-expanded="true"] .icon-close {
  display: block;
}

/* Mobile breakpoint */
@media (max-width: 767px) {
  .mobile-menu-toggle {
    display: flex;
    align-items: center;
    justify-content: center;
  }

  .site-nav {
    position: fixed;
    top: 61px;
    left: 0;
    right: 0;
    background: var(--midnight-elevated);
    border-bottom: 1px solid rgba(230, 232, 235, 0.08);
    flex-direction: column;
    align-items: stretch;
    padding: var(--space-3) var(--space-4);
    gap: var(--space-1);
    display: none;
    box-shadow: var(--shadow-high);
    z-index: 49;
  }

  .site-nav.is-open {
    display: flex;
  }

  .nav-link {
    padding: var(--space-2) var(--space-3);
    font-size: var(--text-base);
    justify-content: flex-start;
  }
}