/* Shared public navigation — exact R4 landing navigation treatment. */
@layer components {
  .ld-nav {
    position: sticky;
    top: 0;
    z-index: var(--z-nav);
    background: color-mix(in oklab, var(--color-surface) 86%, transparent);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--color-border-subtle);
  }

  .ld-nav__in {
    display: flex;
    align-items: center;
    gap: var(--space-4);
    max-width: 1140px;
    height: 68px;
    margin: 0 auto;
    padding: 0 var(--space-6);
  }

  .ld-nav__brand {
    display: flex;
    align-items: baseline;
    gap: 0;
    color: var(--color-primary);
    font-family: var(--font-heading);
    font-size: 1.6rem;
    letter-spacing: var(--letter-spacing-display);
    text-decoration: none;
    white-space: nowrap;
  }

  .ld-nav__dot {
    color: var(--color-accent);
  }

  .ld-nav__place {
    margin-left: var(--space-2);
    color: var(--color-text-tertiary);
    font-family: var(--font-body);
    font-size: var(--font-size-xs);
    font-weight: 600;
    letter-spacing: var(--letter-spacing-wide);
    text-transform: uppercase;
  }

  .ld-nav__links {
    display: flex;
    align-items: center;
    gap: var(--space-6);
    margin-left: auto;
  }

  .ld-nav__link {
    color: var(--color-text-secondary);
    font-size: var(--font-size-sm);
    font-weight: 500;
    text-decoration: none;
    white-space: nowrap;
  }

  .ld-nav__link:hover,
  .ld-nav__link.is-active {
    color: var(--color-primary);
  }

  .ld-nav__link.is-active {
    text-decoration: underline;
    text-decoration-color: var(--color-accent);
    text-decoration-thickness: 2px;
    text-underline-offset: 6px;
  }

  .ld-nav .btn {
    padding: var(--space-2) var(--space-4);
    border: 1px solid transparent;
    font-size: var(--font-size-sm);
    line-height: inherit;
    white-space: nowrap;
    transition:
      background var(--dur-1) var(--ease),
      color var(--dur-1) var(--ease),
      border-color var(--dur-1) var(--ease),
      transform var(--dur-2) var(--ease);
  }

  @media (max-width: 820px) {
    .ld-nav__links {
      gap: var(--space-3);
    }

    .ld-nav__links .ld-nav__link {
      display: none;
    }
  }

  @media (max-width: 420px) {
    .ld-nav__in {
      padding: 0 var(--space-4);
    }

    .ld-nav__place {
      display: none;
    }

    .ld-nav .btn {
      padding-inline: var(--space-3);
    }
  }

  @media (prefers-reduced-motion: reduce) {
    .ld-nav .btn {
      transition: none;
    }

    .ld-nav .btn-accent:hover {
      transform: none;
    }
  }
}