/* =========================================================================
   Site chrome: announcement bar, header, mega menu, drawers, footer.
   ========================================================================= */

@layer components {

  /* ------------------------------------------------------ announcement bar */

  .announce {
    background: var(--bg-elev);
    border-bottom: 1px solid var(--line);
    font-size: var(--fs-micro);
    font-family: var(--font-mono);
    letter-spacing: 0.04em;
    color: var(--text-dim);
  }
  .announce .wrap {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--s-4);
    min-height: 36px;
    position: relative;
  }
  .announce b { color: var(--accent-text); font-weight: 600; }
  .announce-close {
    position: absolute;
    inset-inline-end: var(--gutter);
    color: var(--text-faint);
    line-height: 1;
    padding: var(--s-1);
  }
  .announce-close:hover { color: var(--text); }
  .announce[hidden] { display: none; }

  /* ---------------------------------------------------------------- header */

  .site-header {
    position: sticky;
    top: 0;
    z-index: var(--z-header);
    background: color-mix(in srgb, var(--bg) 86%, transparent);
    backdrop-filter: blur(14px) saturate(140%);
    -webkit-backdrop-filter: blur(14px) saturate(140%);
    border-bottom: 1px solid var(--line);
    transition: border-color var(--d-ui) var(--ease), background-color var(--d-ui) var(--ease);
  }
  @supports not (backdrop-filter: blur(1px)) {
    .site-header { background: var(--bg); }
  }
  /* Once the page has moved off the top, the header earns a little weight. */
  .site-header.is-stuck { border-bottom-color: var(--line-strong); box-shadow: var(--shadow-2); }

  .header-bar {
    display: grid;
    grid-template-columns: auto 1fr auto;
    align-items: center;
    gap: var(--s-5);
    min-height: var(--header-h);
  }

  /* ------------------------------------------------------------- wordmark */

  .brand {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    flex: none;
  }
  .brand-mark {
    width: 26px;
    height: 26px;
    flex: none;
    color: var(--accent);
  }
  .brand-word {
    font-family: var(--font-display);
    font-weight: 700;
    font-stretch: 122%;
    font-size: 15px;
    letter-spacing: 0.01em;
    line-height: 1;
    text-transform: uppercase;
  }
  .brand-word span { color: var(--text-faint); font-weight: 500; }

  /* ------------------------------------------------------------------ nav */

  .nav {
    display: none;
    align-items: center;
    gap: var(--s-1);
    justify-self: start;
  }
  @media (min-width: 1024px) { .nav { display: flex; } }

  .nav-item {
    position: relative;
    display: inline-flex;
    align-items: center;
    gap: 5px;
    padding: 9px 12px;
    border-radius: var(--r);
    font-size: var(--fs-sm);
    font-weight: 500;
    color: var(--text-dim);
    transition: color var(--d-micro) var(--ease), background-color var(--d-micro) var(--ease);
  }
  .nav-item:hover, .nav-item[aria-expanded="true"] { color: var(--text); background: var(--bg-elev-2); }
  .nav-item[aria-current="page"] { color: var(--text); }
  .nav-item[aria-current="page"]::after {
    content: "";
    position: absolute;
    left: 12px;
    right: 12px;
    bottom: 2px;
    height: 2px;
    background: var(--accent);
    border-radius: 2px;
  }
  .nav-item svg { width: 12px; height: 12px; transition: transform var(--d-ui) var(--ease); }
  .nav-item[aria-expanded="true"] svg { transform: rotate(180deg); }

  /* ------------------------------------------------------------ mega menu */

  .mega {
    position: absolute;
    inset-inline: 0;
    top: 100%;
    background: var(--bg-elev);
    border-block: 1px solid var(--line);
    box-shadow: var(--shadow-3);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-6px);
    transform-origin: top center;
    transition: opacity var(--d-ui) var(--ease),
                transform var(--d-ui) var(--ease),
                visibility 0s linear var(--d-ui);
  }
  .mega[data-open="true"] {
    opacity: 1;
    visibility: visible;
    transform: none;
    transition-delay: 0s;
  }
  .mega-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr) 300px;
    gap: var(--s-6);
    padding-block: var(--s-6) var(--s-7);
  }
  .mega-col h4 {
    font-family: var(--font-mono);
    font-size: var(--fs-micro);
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--text-faint);
    font-weight: 500;
    margin-bottom: var(--s-3);
  }
  .mega-col a {
    display: block;
    padding: 5px 0;
    font-size: var(--fs-sm);
    color: var(--text-dim);
    transition: color var(--d-micro) var(--ease), transform var(--d-micro) var(--ease);
  }
  .mega-col a:hover { color: var(--text); transform: translateX(3px); }
  .mega-col a .count {
    font-family: var(--font-mono);
    font-size: 11px;
    color: var(--text-faint);
    margin-left: 6px;
  }

  .mega-feature {
    border-left: 1px solid var(--line);
    padding-left: var(--s-6);
    display: flex;
    flex-direction: column;
    gap: var(--s-3);
  }
  .mega-feature .plate { aspect-ratio: 4 / 3; }

  /* -------------------------------------------------------------- actions */

  .header-actions {
    display: flex;
    align-items: center;
    gap: var(--s-1);
    justify-self: end;
  }

  .cart-btn { position: relative; }
  .cart-count {
    position: absolute;
    top: 3px;
    inset-inline-end: 1px;
    min-width: 17px;
    height: 17px;
    padding-inline: 4px;
    display: grid;
    place-items: center;
    background: var(--accent);
    color: var(--accent-ink);
    border-radius: var(--r-pill);
    font-family: var(--font-mono);
    font-size: 10px;
    font-weight: 600;
    line-height: 1;
  }
  .cart-count[data-empty="true"] { display: none; }

  /* --------------------------------------------------------- search panel */

  .search-panel {
    position: absolute;
    inset-inline: 0;
    top: 100%;
    background: var(--bg-elev);
    border-bottom: 1px solid var(--line);
    box-shadow: var(--shadow-2);
    display: grid;
    grid-template-rows: 0fr;
    opacity: 0;
    visibility: hidden;
    transition: grid-template-rows var(--d-ui) var(--ease),
                opacity var(--d-ui) var(--ease),
                visibility 0s linear var(--d-ui);
  }
  .search-panel[data-open="true"] {
    grid-template-rows: 1fr;
    opacity: 1;
    visibility: visible;
    transition-delay: 0s;
  }
  .search-panel > div { overflow: hidden; }
  .search-form {
    display: flex;
    gap: var(--s-3);
    padding-block: var(--s-5);
  }
  .search-form .input { font-size: var(--fs-body-l); min-height: 54px; }

  /* -------------------------------------------------------------- drawers */

  .scrim {
    position: fixed;
    inset: 0;
    z-index: var(--z-drawer);
    background: rgba(11, 12, 12, 0.55);
    backdrop-filter: blur(2px);
    opacity: 0;
    visibility: hidden;
    transition: opacity var(--d-ui) var(--ease), visibility 0s linear var(--d-ui);
  }
  .scrim[data-open="true"] { opacity: 1; visibility: visible; transition-delay: 0s; }

  .drawer {
    position: fixed;
    top: 0;
    bottom: 0;
    inset-inline-end: 0;
    width: min(430px, 100vw);
    z-index: calc(var(--z-drawer) + 1);
    background: var(--bg);
    border-inline-start: 1px solid var(--line);
    display: flex;
    flex-direction: column;
    transform: translateX(100%);
    transition: transform var(--d-ui) var(--ease-io);
    will-change: transform;
  }
  .drawer[data-open="true"] { transform: none; }
  .drawer-left {
    inset-inline: 0 auto;
    width: min(360px, 100vw);
    border-inline: 0 1px solid var(--line);
    transform: translateX(-100%);
  }

  .drawer-head {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--s-4);
    padding: var(--s-4) var(--s-5);
    border-bottom: 1px solid var(--line);
    min-height: var(--header-h);
    flex: none;
  }
  .drawer-head h2 { font-size: var(--fs-h3); }
  .drawer-body { flex: 1; overflow-y: auto; overscroll-behavior: contain; }
  .drawer-foot {
    flex: none;
    padding: var(--s-5);
    border-top: 1px solid var(--line);
    background: var(--bg-elev);
    display: flex;
    flex-direction: column;
    gap: var(--s-4);
  }

  /* mobile navigation list inside the left drawer */
  .mnav { padding: var(--s-3) 0; }
  .mnav a {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--s-4) var(--s-5);
    font-size: var(--fs-body-l);
    font-weight: 500;
    border-bottom: 1px solid var(--line);
  }
  .mnav a:active { background: var(--bg-elev-2); }
  .mnav .sub { font-size: var(--fs-sm); color: var(--text-dim); font-weight: 400; }
  .mnav-group { padding: var(--s-5); }
  .mnav-group h4 {
    font-family: var(--font-mono);
    font-size: var(--fs-micro);
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--text-faint);
    margin-bottom: var(--s-3);
  }

  /* -------------------------------------------------------------- footer */

  .site-footer {
    border-top: 1px solid var(--line);
    background: var(--bg-elev);
    margin-top: var(--s-9);
  }
  .footer-top {
    display: grid;
    gap: var(--s-8);
    padding-block: var(--s-8);
  }
  @media (min-width: 900px) {
    .footer-top {
      grid-template-columns: minmax(0, 1.4fr) repeat(3, minmax(0, 0.8fr));
      gap: var(--s-6);
      padding-block: var(--s-9);
    }
  }
  .footer-brand { display: flex; flex-direction: column; gap: var(--s-4); max-width: 42ch; }
  .footer-brand p { color: var(--text-dim); font-size: var(--fs-sm); }

  .newsletter { display: flex; gap: var(--s-2); max-width: 400px; }
  .newsletter .input { min-height: 46px; }

  .footer-col h4 {
    font-family: var(--font-mono);
    font-size: var(--fs-micro);
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--text-faint);
    margin-bottom: var(--s-4);
  }
  .footer-col a {
    display: block;
    padding: 4px 0;
    font-size: var(--fs-sm);
    color: var(--text-dim);
    transition: color var(--d-micro) var(--ease);
  }
  .footer-col a:hover { color: var(--text); }

  .footer-bottom {
    border-top: 1px solid var(--line);
    padding-block: var(--s-5);
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
    gap: var(--s-4);
    font-size: var(--fs-micro);
    color: var(--text-faint);
    font-family: var(--font-mono);
  }
  .footer-bottom nav { display: flex; flex-wrap: wrap; gap: var(--s-4); }
  .footer-bottom a:hover { color: var(--text); }

  .theme-toggle {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 7px 12px;
    border: 1px solid var(--line);
    border-radius: var(--r-pill);
    font-family: var(--font-mono);
    font-size: 11px;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    color: var(--text-dim);
    transition: border-color var(--d-micro) var(--ease), color var(--d-micro) var(--ease);
  }
  .theme-toggle:hover { border-color: var(--text); color: var(--text); }
  .theme-toggle svg { width: 14px; height: 14px; }
}