/* Storefront shell: header, drawer, footer, content pages. Tokens only. */
@layer components {
  /* ─── Skip link ─────────────────────────────────────────────────── */
  .skip-link {
    position: absolute;
    z-index: var(--z-tooltip);
    inset-block-start: var(--space-2);
    inset-inline-start: var(--space-2);
    padding: var(--space-2) var(--space-4);
    border-radius: var(--radius-md);
    background: var(--color-text);
    color: var(--color-bg);
    text-decoration: none;
    transform: translateY(-200%);
  }

  .skip-link:focus {
    color: var(--color-bg);
    transform: none;
  }

  .site-main {
    display: block;
    min-block-size: 60vh;
  }

  .site-main:focus {
    outline: none;
  }

  /* ─── Brand ─────────────────────────────────────────────────────── */
  .brand {
    display: inline-flex;
    flex: none;
    align-items: center;
    gap: var(--space-2);
    color: var(--color-text);
    font-size: var(--text-18);
    font-weight: var(--weight-bold);
    line-height: 1;
    text-decoration: none;
    white-space: nowrap;
  }

  .brand:hover {
    color: var(--color-text);
  }

  .brand__mark {
    inline-size: 26px;
    block-size: 26px;
  }

  /* ─── Header ────────────────────────────────────────────────────── */
  /* The header only earns a shadow once there is content underneath it to cast onto.
     At the top of the page it is part of the page; scrolled, it is floating UI, which is
     exactly the case BRIEF §7 keeps shadows for. `ui.js` sets `data-scrolled`. */
  .site-header {
    position: sticky;
    z-index: var(--z-sticky);
    inset-block-start: 0;
    border-block-end: 1px solid var(--color-border);
    background: var(--color-bg);
    transition:
      box-shadow var(--duration-normal) var(--ease-out),
      border-color var(--duration-normal) var(--ease-out);
  }

  .site-header[data-scrolled] {
    border-block-end-color: transparent;
    box-shadow: var(--shadow-sm);
  }

  .site-header__bar {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    min-block-size: 60px;
  }

  .site-header__menu {
    margin-inline-start: calc(-1 * var(--space-2));
  }

  .site-nav,
  .site-header__search--desktop {
    display: none;
  }

  .site-header__actions {
    display: flex;
    align-items: center;
    gap: var(--space-1);
    margin-inline-start: auto;
    margin-inline-end: calc(-1 * var(--space-2));
  }

  .site-header__search-row {
    padding-block-end: var(--space-3);
  }

  .search-field {
    position: relative;
    inline-size: 100%;
  }

  .search-field > .icon {
    position: absolute;
    inset-block-start: 50%;
    inset-inline-start: var(--space-3);
    color: var(--color-text-secondary);
    pointer-events: none;
    translate: 0 -50%;
  }

  .search-field .input {
    padding-inline-start: var(--space-10);
    border-color: transparent;
    background-color: var(--color-surface-alt);
  }

  .search-field .input:hover {
    border-color: var(--color-border-strong);
  }

  .search-field .input:focus {
    background-color: var(--color-bg);
  }

  /* Native search clear button: keep it on the inline-end side and in brand color. */
  .search-field .input::-webkit-search-cancel-button {
    cursor: pointer;
  }

  .cart-button__count {
    position: absolute;
    inset-block-start: 4px;
    inset-inline-end: 2px;
    display: grid;
    place-items: center;
    min-inline-size: 18px;
    block-size: 18px;
    padding-inline: var(--space-1);
    border: 2px solid var(--color-bg);
    border-radius: var(--radius-full);
    background: var(--color-primary);
    color: var(--color-on-primary);
    font-size: var(--text-12);
    font-weight: var(--weight-bold);
    line-height: 1;
    box-sizing: content-box;
  }

  @media (min-width: 1024px) {
    .site-header__bar {
      gap: var(--space-4);
      min-block-size: 68px;
    }

    .site-header__menu,
    .site-header__search-row {
      display: none;
    }

    .brand {
      font-size: var(--text-20);
    }

    .brand__mark {
      inline-size: 28px;
      block-size: 28px;
    }

    .site-nav {
      display: flex;
      align-items: center;
      gap: var(--space-1);
    }

    .site-nav__trigger,
    .site-nav__link {
      color: var(--color-text-strong-muted);
      font-weight: var(--weight-medium);
    }

    .site-header__search--desktop {
      display: block;
      flex: 1;
      max-inline-size: 520px;
      margin-inline-start: auto;
    }

    .site-header__actions {
      margin-inline-start: 0;
    }
  }

  /* ─── Drawer (mobile navigation, native <dialog>) ───────────────── */
  .modal.drawer {
    inline-size: min(340px, 88vw);
    max-inline-size: none;
    block-size: 100dvh;
    max-block-size: 100dvh;
    margin: 0;
    inset-block: 0;
    inset-inline: 0 auto;
  }

  .modal.drawer[open] {
    animation: drawer-in var(--duration-large) var(--ease-out);
  }

  .modal.drawer[data-closing] {
    animation: drawer-out var(--duration-normal) var(--ease-in) forwards;
  }

  @keyframes drawer-in {
    from {
      transform: translateX(100%);
    }
  }

  @keyframes drawer-out {
    to {
      transform: translateX(100%);
    }
  }

  .drawer__panel {
    display: flex;
    flex-direction: column;
    block-size: 100%;
    overflow-y: auto;
    padding-block-end: env(safe-area-inset-bottom);
    background: var(--color-bg);
    box-shadow: var(--shadow-lg);
  }

  .drawer__header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    min-block-size: 60px;
    padding-inline: var(--space-4) var(--space-2);
    border-block-end: 1px solid var(--color-border);
  }

  .drawer__nav {
    flex: 1;
    padding: var(--space-4);
  }

  .drawer__heading {
    margin-block: var(--space-4) var(--space-1);
    padding-inline: var(--space-3);
    color: var(--color-text-secondary);
    font-size: var(--text-13);
    font-weight: var(--weight-medium);
  }

  .drawer__heading:first-child {
    margin-block-start: 0;
  }

  .drawer__list {
    margin: 0;
    padding: 0;
    list-style: none;
  }

  .drawer__link {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    min-block-size: var(--control-md);
    padding-inline: var(--space-3);
    border-radius: var(--radius-md);
    color: var(--color-text);
    font-size: var(--text-15);
    text-decoration: none;
  }

  .drawer__link .icon {
    color: var(--color-text-secondary);
  }

  .drawer__link:hover {
    background: var(--color-surface-alt);
    color: var(--color-text);
  }

  .drawer__footer {
    padding: var(--space-4);
    border-block-start: 1px solid var(--color-border);
  }

  /* ─── Footer ────────────────────────────────────────────────────── */
  .site-footer {
    margin-block-start: var(--space-20);
    padding-block: var(--space-12) var(--space-6);
    border-block-start: 1px solid var(--color-border);
    color: var(--color-text-strong-muted);
    font-size: var(--text-14);
  }

  .site-footer__grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: var(--space-8) var(--space-6);
  }

  .site-footer__brand {
    grid-column: 1 / -1;
  }

  .site-footer__brand p {
    max-inline-size: 44ch;
    margin-block-start: var(--space-4);
    line-height: var(--leading-body);
  }

  .site-footer__title {
    margin-block-end: var(--space-3);
    color: var(--color-text);
    font-size: var(--text-14);
    font-weight: var(--weight-semibold);
  }

  .site-footer ul {
    margin: 0;
    padding: 0;
    list-style: none;
  }

  .site-footer li a {
    display: inline-block;
    padding-block: var(--space-2);
    color: var(--color-text-strong-muted);
    text-decoration: none;
  }

  .site-footer li a:hover {
    color: var(--color-text);
  }

  .site-footer__bottom {
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    gap: var(--space-2) var(--space-6);
    margin-block-start: var(--space-10);
    padding-block-start: var(--space-6);
    border-block-start: 1px solid var(--color-border);
    font-size: var(--text-13);
  }

  @media (min-width: 768px) {
    .site-footer__grid {
      grid-template-columns: minmax(0, 2fr) repeat(3, minmax(0, 1fr));
    }

    .site-footer__brand {
      grid-column: auto;
    }
  }

  /* ─── Content pages ─────────────────────────────────────────────── */
  .page-hero {
    padding-block: var(--space-10) var(--space-8);
  }

  .page-hero h1 {
    font-size: var(--text-h1);
  }

  .page-hero p {
    max-inline-size: 60ch;
    margin-block-start: var(--space-3);
    color: var(--color-text-strong-muted);
    font-size: var(--text-18);
    line-height: var(--leading-body);
  }

  @media (min-width: 768px) {
    .page-hero {
      padding-block: var(--space-16) var(--space-10);
    }
  }

  .prose {
    max-inline-size: 72ch;
    color: var(--color-text-strong-muted);
    line-height: var(--leading-body);
  }

  .prose:not(.tabs__panel) {
    padding: var(--space-6);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    background: var(--color-bg);
  }

  @media (min-width: 768px) {
    .prose:not(.tabs__panel) {
      padding: var(--space-8);
    }
  }

  /* First child would otherwise push a gap above itself inside the panel. */
  .prose > :first-child {
    margin-block-start: 0;
  }

  .prose > * + * {
    margin-block-start: var(--space-4);
  }

  .prose h2 {
    margin-block-start: var(--space-10);
    color: var(--color-text);
    font-size: var(--text-h4);
  }

  .prose h3 {
    margin-block-start: var(--space-6);
    color: var(--color-text);
    font-size: var(--text-18);
  }

  .prose ul,
  .prose ol {
    padding-inline-start: var(--space-6);
  }

  .prose li + li {
    margin-block-start: var(--space-2);
  }

  .prose strong {
    color: var(--color-text);
  }

  .page-updated {
    margin-block-start: var(--space-10);
    color: var(--color-text-strong-muted);
    font-size: var(--text-13);
  }

  /* FAQ accordion: native <details>, keyboard accessible without JS. */
  .faq {
    max-inline-size: 72ch;
    overflow: hidden;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    background: var(--color-bg);
  }

  .faq__item + .faq__item {
    border-block-start: 1px solid var(--color-border);
  }

  .faq__question {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-4);
    min-block-size: var(--control-lg);
    padding-block: var(--space-4);
    padding-inline: var(--space-5);
    color: var(--color-text);
    font-size: var(--text-16);
    font-weight: var(--weight-semibold);
    line-height: var(--leading-snug);
    list-style: none;
    cursor: pointer;
  }

  .faq__question::-webkit-details-marker {
    display: none;
  }

  .faq__question .icon {
    color: var(--color-text-secondary);
    transition: transform var(--duration-normal) var(--ease-out);
  }

  .faq__item[open] .faq__question .icon {
    transform: rotate(180deg);
  }

  .faq__answer {
    padding-block-end: var(--space-5);
    padding-inline: var(--space-5);
    color: var(--color-text-strong-muted);
    line-height: var(--leading-body);
  }

  .faq__answer > * + * {
    margin-block-start: var(--space-3);
  }

  .faq-group + .faq-group {
    margin-block-start: var(--space-12);
  }

  .faq-group > h2 {
    margin-block-end: var(--space-4);
    font-size: var(--text-h4);
    scroll-margin-block-start: var(--space-24);
  }

  /* Numbered process (sequence carries meaning: these are ordered steps). */
  .steps {
    display: grid;
    gap: var(--space-4);
    margin: 0;
    padding: 0;
    list-style: none;
    counter-reset: step;
  }

  .steps li {
    display: grid;
    grid-template-columns: auto 1fr;
    gap: var(--space-1) var(--space-4);
    counter-increment: step;
  }

  .steps li::before {
    content: counter(step, persian);
    display: grid;
    grid-row: span 2;
    place-items: center;
    inline-size: 32px;
    block-size: 32px;
    border-radius: var(--radius-full);
    background: var(--color-text);
    color: var(--color-bg);
    font-size: var(--text-14);
    font-weight: var(--weight-bold);
  }

  .steps strong {
    color: var(--color-text);
  }

  /* ─── Listing pages ─────────────────────────────────────────────── */
  .listing-header {
    display: flex;
    flex-wrap: wrap;
    align-items: flex-end;
    justify-content: space-between;
    gap: var(--space-4);
    padding-block: var(--space-6) var(--space-6);
  }

  .listing-header h1 {
    font-size: var(--text-h1);
  }

  .listing-header p {
    margin-block-start: var(--space-2);
    color: var(--color-text-strong-muted);
  }

  .product-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: var(--space-3);
  }

  @media (min-width: 768px) {
    .product-grid {
      grid-template-columns: repeat(3, minmax(0, 1fr));
      gap: var(--space-5);
    }
  }

  @media (min-width: 1024px) {
    .product-grid {
      grid-template-columns: repeat(4, minmax(0, 1fr));
    }
  }

  .listing-pagination {
    margin-block-start: var(--space-10);
  }

  /* ─── Error pages ───────────────────────────────────────────────── */
  .error-page {
    display: grid;
    place-items: center;
    min-block-size: 60vh;
    padding-block: var(--space-12);
    text-align: center;
  }

  .error-page__code {
    color: var(--color-text-muted);
    font-size: var(--text-h1);
    font-weight: var(--weight-bold);
    line-height: 1;
  }

  /* `.icon` is display:block, so text-align cannot centre it — in RTL it would hug the right edge. */
  .error-page__code .icon {
    margin-inline: auto;
  }

  .error-page h1 {
    margin-block-start: var(--space-4);
    font-size: var(--text-h3);
  }

  .error-page p {
    max-inline-size: 44ch;
    margin: var(--space-3) auto 0;
    color: var(--color-text-strong-muted);
  }

  .error-page .cluster {
    justify-content: center;
    margin-block-start: var(--space-6);
  }

  /* The estimated-return chip on the maintenance page. inline-flex, not the inherited `.error-page p`
     block: `.icon` is display:block, so in a plain paragraph it breaks onto its own line and drifts to
     the inline-start edge instead of sitting beside the text. */
  .maintenance__eta {
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
    margin-block-start: var(--space-5);
    padding: var(--space-2) var(--space-4);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    background: var(--color-bg);
    color: var(--color-text-strong-muted);
    font-size: var(--text-14);
  }

  .maintenance__eta .icon {
    color: var(--color-text-secondary);
  }

  /* A time is a number the visitor is about to act on, so it gets the tabular treatment prices use. */
  .maintenance__eta strong {
    font-variant-numeric: tabular-nums;
    font-weight: var(--weight-semibold);
  }
}