/*
  Estrutura do shell (ADR-016): regiões, grid e componentes de estrutura.
  Mobile-first; o grid é resolvido em CSS a partir de `data-preset`/`data-left`/`data-right` —
  nenhum cálculo de grid em PHP.
*/
@layer components {
  /* ── Página e grid ───────────────────────────────────────────────────── */
  .layout-page {
    display: flex;
    flex-direction: column;
    min-block-size: 100dvh;
    background-color: var(--surface);
    color: var(--ink);
  }

  .layout-grid {
    display: grid;
    grid-template-columns: minmax(0, 1fr);
    gap: var(--space-gutter);
    inline-size: 100%;
    max-inline-size: var(--shell-max);
    margin-inline: auto;
    padding-inline: var(--space-container);
    padding-block: var(--space-section);
    flex: 1;
  }

  @media (min-width: 64rem) {
    .layout-grid[data-left='true'][data-right='true'] {
      grid-template-columns: minmax(0, 21fr) minmax(0, 55fr) minmax(0, 21fr);
    }

    .layout-grid[data-left='true'][data-right='false'] {
      grid-template-columns: minmax(0, 24fr) minmax(0, 76fr);
    }

    .layout-grid[data-left='false'][data-right='true'] {
      grid-template-columns: minmax(0, 76fr) minmax(0, 24fr);
    }
  }

  .layout-main,
  .layout-aside {
    min-inline-size: 0;
  }

  /* Alinhamento entre componentes via subgrid (planos 09/10) — fallback: grid simples. */
  .align-rows {
    display: grid;
    grid-template-rows: auto 1fr auto;
    gap: 0.75rem;
  }

  @supports (grid-template-rows: subgrid) {
    .align-rows {
      grid-row: span 3;
      grid-template-rows: subgrid;
    }
  }

  /* ── Atalhos (skip links) ────────────────────────────────────────────── */
  .skip-links {
    position: absolute;
    inset-block-start: -100%;
    inset-inline-start: 0.5rem;
    z-index: var(--z-toast);
    display: flex;
    gap: 0.5rem;
  }

  .skip-links:focus-within {
    inset-block-start: 0.5rem;
  }

  .skip-links__link {
    padding: 0.5rem 0.75rem;
    background-color: var(--surface);
    color: var(--tenant-link);
    border: 0.125rem solid var(--tenant-primary);
    border-radius: var(--tenant-radius);
    text-decoration: underline;
  }

  /* ── Header ──────────────────────────────────────────────────────────── */
  .site-header {
    background-color: var(--area-header-bg);
    border-block-end: 0.0625rem solid var(--line);
  }

  .site-header__inner {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    inline-size: 100%;
    max-inline-size: var(--shell-max);
    margin-inline: auto;
    padding-inline: var(--space-container);
    padding-block: 1rem;
  }

  .site-header__brand {
    display: inline-flex;
    align-items: center;
    gap: 0.75rem;
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--ink);
    text-decoration: none;
  }

  .site-header__brand-icon {
    inline-size: 2rem;
    block-size: 2rem;
    color: var(--tenant-primary);
  }

  /* ── Navegação ───────────────────────────────────────────────────────── */
  .site-nav__list {
    display: flex;
    flex-wrap: wrap;
    gap: 0.25rem;
    margin: 0;
    padding: 0;
    list-style: none;
  }

  .site-nav__link {
    display: inline-block;
    padding: 0.5rem 0.75rem;
    color: var(--ink);
    text-decoration: none;
    border-radius: var(--tenant-radius);
  }

  .site-nav__link:hover {
    background-color: var(--surface-muted);
    color: var(--link-hover);
    text-decoration: underline;
  }

  /* Link da página atual: destaque textual + semântica `aria-current="page"`. */
  .site-nav__link[aria-current='page'] {
    color: var(--tenant-link);
    font-weight: 700;
    text-decoration: underline;
  }

  /* Submenu: `<details>` nativo (funciona sem JS — ADR-010), nunca hover-only. */
  .site-nav__item {
    position: relative;
  }

  .site-nav__summary {
    display: inline-flex;
    align-items: center;
    gap: 0.375rem;
    cursor: pointer;
  }

  .site-nav__summary::-webkit-details-marker {
    display: none;
  }

  .site-nav__group[open] > .site-nav__summary {
    background-color: var(--surface-muted);
  }

  .site-nav__submenu {
    position: absolute;
    inset-block-start: calc(100% + 0.25rem);
    inset-inline-start: 0;
    z-index: 20;
    min-inline-size: 14rem;
    margin: 0;
    padding: 0.5rem;
    list-style: none;
    background-color: var(--surface);
    border: 0.0625rem solid var(--line);
    border-radius: var(--tenant-radius);
    box-shadow: var(--shadow-card);
  }

  .site-nav__submenu .site-nav__link {
    inline-size: 100%;
  }

  /* Nível 3: o submenu interno não flutua de novo (evita sobreposição no mobile). */
  .site-nav__submenu .site-nav__submenu {
    position: static;
    inset-block-start: auto;
    margin-block-start: 0.25rem;
    box-shadow: none;
  }

  @media (max-width: 63.9375rem) {
    .site-nav__submenu {
      position: static;
      inset-block-start: auto;
      box-shadow: none;
    }
  }

  /* ── Breadcrumb ──────────────────────────────────────────────────────── */
  .breadcrumbs {
    inline-size: 100%;
    max-inline-size: var(--shell-max);
    margin-inline: auto;
    padding-inline: var(--space-container);
    padding-block-start: 1rem;
  }

  .breadcrumbs__list {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 0.5rem;
    margin: 0;
    padding: 0;
    list-style: none;
    font-size: 0.875rem;
    color: var(--ink-muted);
  }

  /* Alvo mínimo WCAG 2.2 (SC 2.5.8): ≥1.5rem em qualquer ponteiro. */
  .breadcrumbs__list a {
    display: inline-flex;
    align-items: center;
    min-block-size: 1.5rem;
    color: var(--tenant-link);
  }

  .breadcrumbs__item + .breadcrumbs__item::before {
    content: '/';
    margin-inline-end: 0.5rem;
    color: var(--line);
  }

  /* ── Rodapé ──────────────────────────────────────────────────────────── */
  .site-footer {
    background-color: var(--area-footer-bg);
    color: var(--ink-inverse);
  }

  .site-footer__inner {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    inline-size: 100%;
    max-inline-size: var(--shell-max);
    margin-inline: auto;
    padding-inline: var(--space-container);
    padding-block: var(--space-section);
  }

  .site-footer__brand {
    font-weight: 700;
  }

  .site-footer__links {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
    margin: 0;
    padding: 0;
    list-style: none;
  }

  .site-footer a {
    color: inherit;
  }

  /* Alvo mínimo WCAG 2.2 (SC 2.5.8): ≥1.5rem em qualquer ponteiro. */
  .site-footer__links a {
    display: inline-flex;
    align-items: center;
    min-block-size: 1.5rem;
  }

  .site-footer__note {
    font-size: 0.875rem;
    opacity: 0.8;
  }
}