/* Header-specific styling layered on base.css */

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

.site-header-inner {
  min-height: 64px;
}

.brand-lockup {
  text-decoration: none;
}

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

.nav {
  display: flex;
  align-items: center;
  gap: var(--space-6);
}

.nav-link--accent {
  color: var(--color-primary);
}

.nav-link--accent::after {
  background-color: var(--color-primary);
}

.nav-cta {
  white-space: nowrap;
}

/* Mobile navigation layout */
@media (max-width: 960px) {
  .site-header-inner {
    align-items: center;
  }

  .nav-cta {
    display: none;
  }

  .nav-shell {
    position: fixed;
    inset: 64px 16px auto 16px;
    max-height: calc(100vh - 96px);
    background: radial-gradient(circle at top left, rgba(249, 115, 22, 0.18), transparent 55%),
                var(--color-surface-alt);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-hard);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-8px);
    transition: opacity var(--transition-base),
                visibility var(--transition-base),
                transform var(--transition-base);
  }

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

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

  .nav {
    flex-direction: column;
    align-items: flex-start;
    padding: var(--space-4) var(--space-4) var(--space-5);
    gap: var(--space-4);
  }

  .nav-link {
    font-size: 0.8rem;
  }

  .nav-toggle {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border-radius: var(--radius-full);
    border: 1px solid var(--color-border);
    background-color: rgba(0, 0, 0, 0.6);
    cursor: pointer;
  }

  .nav-toggle span {
    transition: transform var(--transition-fast),
                opacity var(--transition-fast);
  }

  .nav-toggle.is-active span:nth-child(1) {
    transform: translateY(6px) rotate(45deg);
  }

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

  .nav-toggle.is-active span:nth-child(3) {
    transform: translateY(-6px) rotate(-45deg);
  }
}

@media (min-width: 961px) {
  .nav-toggle {
    display: none;
  }

  .nav-shell {
    position: static;
    opacity: 1;
    visibility: visible;
    transform: none;
    background: transparent;
    border: none;
    box-shadow: none;
  }

  .nav {
    display: flex;
  }

  .nav-cta {
    display: inline-flex;
  }
}

/* Focus styles for accessibility */
.nav-toggle:focus-visible,
.brand-lockup:focus-visible {
  box-shadow: var(--shadow-outline);
  outline: none;
}

.nav-link:focus-visible {
  outline: none;
  box-shadow: var(--shadow-outline);
  border-radius: 2px;
}