.site-header {
  background-color: var(--color-bg);
  border-bottom: 1px solid var(--color-border);
}

.nav-brand {
  display: flex;
  flex-direction: column;
  gap: 2px;
  color: var(--color-text);
}

.nav-brand-main {
  font-size: var(--font-size-sm);
  letter-spacing: 0.18em;
  text-transform: uppercase;
}

.nav-brand-sub {
  font-size: var(--font-size-xs);
  color: var(--color-muted);
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

.nav-primary {
  flex: 1;
  display: flex;
  justify-content: center;
}

.nav-menu {
  font-size: var(--font-size-sm);
}

.nav-cta-wrap {
  display: flex;
  align-items: center;
}

.nav-cta {
  font-size: var(--font-size-xs);
  padding: 8px 16px;
  border-color: var(--color-text);
}

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

.nav-toggle {
  border-radius: var(--radius-round);
  border: 1px solid transparent;
}

.nav-toggle-bar {
  transition: transform var(--transition-base);
}

.nav-toggle:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 3px;
}

.nav-toggle[aria-expanded="true"] {
  border-color: var(--color-text);
}

.nav-toggle[aria-expanded="true"] .nav-toggle-bar:first-child {
  transform: translateY(2.5px) rotate(45deg);
}

.nav-toggle[aria-expanded="true"] .nav-toggle-bar:last-child {
  transform: translateY(-2.5px) rotate(-45deg);
}

@media (max-width: 768px) {
  .navbar-inner {
    position: relative;
  }

  .nav-primary {
    position: static;
    flex: none;
  }

  .nav-menu {
    left: 50%;
    right: auto;
    width: 100vw;
    max-height: calc(100dvh - 57px);
    overflow-y: auto;
    box-sizing: border-box;
    align-items: stretch;
    padding: var(--space-3) var(--space-4) var(--space-4);
    background-color: var(--color-bg);
    border-bottom: 1px solid var(--color-border);
    box-shadow: 0 12px 24px rgba(0, 0, 0, 0.08);
    transform: translateX(-50%);
    z-index: 30;
  }

  .nav-menu.is-open {
    animation: nav-menu-in var(--transition-base) both;
  }

  .nav-menu li,
  .nav-menu .nav-link {
    width: 100%;
  }

  .nav-menu .nav-link {
    display: block;
    padding: 9px 4px;
  }

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

@keyframes nav-menu-in {
  from {
    opacity: 0;
    transform: translateX(-50%) translateY(-6px);
  }
  to {
    opacity: 1;
    transform: translateX(-50%) translateY(0);
  }
}

@media (prefers-reduced-motion: reduce) {
  .nav-menu.is-open {
    animation: none;
  }

  .nav-toggle-bar {
    transition: none;
  }
}