/* Header-specific styling: builds on base.css */

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
}

.site-header-inner {
  gap: var(--space-4);
}

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

.site-logo-title {
  font-size: var(--font-size-sm);
  letter-spacing: 0.18em;
  text-transform: uppercase;
}

.site-logo-subtitle {
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
}

/* Navigation layout */

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

.nav {
  display: flex;
  align-items: center;
  gap: var(--space-5);
}

.nav-item {
  list-style: none;
}

.nav-cta-item {
  margin-left: var(--space-4);
}

.nav-cta {
  font-size: 0.7rem;
}

/* Mobile nav toggle */

.nav-toggle {
  display: none;
  position: relative;
  width: 40px;
  height: 32px;
  border-radius: var(--radius-pill);
  border: 1px solid rgba(148, 163, 184, 0.5);
  background: rgba(5, 8, 20, 0.9);
  cursor: pointer;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 5px;
  padding: 0;
}

.nav-toggle-bar {
  width: 18px;
  height: 2px;
  border-radius: 999px;
  background: var(--color-text);
  transition: transform var(--transition-normal), opacity var(--transition-fast);
}

/* Mobile: collapse nav */

@media (max-width: 768px) {
  .nav-toggle {
    display: inline-flex;
  }

  .nav-wrapper {
    position: fixed;
    inset: 98px 0 auto 0;
    background: rgba(5, 8, 20, 0.98);
    border-bottom: 1px solid rgba(148, 163, 184, 0.32);
    transform: translateY(-120%);
    opacity: 0;
    visibility: hidden;
    transition: transform var(--transition-normal), opacity var(--transition-normal), visibility var(--transition-normal);
  }

  .nav-wrapper.is-open {
    transform: translateY(0);
    opacity: 1;
    visibility: visible;
  }

  .nav {
    flex-direction: column;
    align-items: flex-start;
    padding: var(--space-4) var(--space-4) var(--space-6);
    gap: var(--space-3);
  }

  .nav-item {
    width: 100%;
  }

  .nav-link {
    display: inline-block;
    padding: 0.35rem 0;
  }

  .nav-cta-item {
    margin-left: 0;
    margin-top: var(--space-2);
  }

  .nav-cta {
    width: 100%;
    justify-content: center;
  }

  /* Transform hamburger into close icon when menu open */
  .nav-toggle.is-open .nav-toggle-bar:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
  }

  .nav-toggle.is-open .nav-toggle-bar:nth-child(2) {
    opacity: 0;
  }

  .nav-toggle.is-open .nav-toggle-bar:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
  }
}

@media (min-width: 769px) {
  .nav-wrapper {
    transform: none !important;
    opacity: 1 !important;
    visibility: visible !important;
    position: static;
    background: transparent;
    border-bottom: none;
  }
}

/* Focus styles for keyboard users */

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

.nav-link:focus-visible,
.nav-cta:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 3px;
}