/* Hallmark · macrostructure: Editorial Catalogue · page: product
   Pre-emit: P5 H4 E4 S5 R4 V4 — no axis below 3.
   Justification: one object, one column of facts — a catalogue entry,
   not a sales page. No urgency, no stock counter. */

/* ==========================================================================
   InihaoStudio — css/pages/product.css
   Product-only layout, loaded after components.css on product.html.
   ========================================================================== */

[data-product-detail] {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(0, 1fr);
  align-items: start;
  gap: var(--space-8);
  margin-top: var(--space-5);
}

/* The gallery column stays in view while the facts column scrolls. */
[data-product-detail] > div:first-child {
  position: sticky;
  top: calc(var(--header-h) + var(--space-4));
}

[data-product-previews] {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: var(--space-3);
  margin-top: var(--space-3);
}

[data-product-previews] > button {
  padding: 0;
  border: 2px solid transparent;
  border-radius: var(--radius-md);
  background-color: var(--paper-2);
  cursor: pointer;
  transition: border-color var(--dur-fast) var(--ease-out);
}

[data-product-previews] > button[aria-pressed="true"] {
  border-color: var(--ink);
}

[data-product-detail] h1 {
  margin-top: var(--space-3);
  font-size: clamp(var(--text-3xl), 4vw, var(--text-5xl));
}

[data-product-price] {
  margin-top: var(--space-4);
  font-size: var(--text-2xl);
}

[data-product-detail] dl {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--space-4);
  margin-block: var(--space-5);
  padding-block: var(--space-4);
  border-block: 1px solid var(--line);
}

[data-product-detail] dd {
  margin: var(--space-1) 0 0;
  font-weight: 600;
}

[data-product-description] {
  max-width: var(--measure);
  color: var(--ink-2);
}

[data-product-includes] {
  margin-block: var(--space-3) var(--space-6);
  padding: 0;
  list-style: none;
}

[data-product-includes] li {
  padding-block: var(--space-2);
  border-bottom: 1px solid var(--line);
}

/* ---- Related -------------------------------------------------------- */

[data-product-related] {
  margin-top: var(--space-9);
}

[data-product-related-grid] {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  align-items: stretch;
  gap: var(--space-6) var(--space-5);
  margin-top: var(--space-5);
}

/* ---- Not found ------------------------------------------------------ */

[data-product-notfound] {
  margin-block: var(--space-8);
}

/* ---- Narrower viewports --------------------------------------------- */

@media (max-width: 899px) {
  [data-product-detail] {
    grid-template-columns: minmax(0, 1fr);
    gap: var(--space-6);
  }

  [data-product-detail] > div:first-child {
    position: static;
  }

  [data-product-related-grid] {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 599px) {
  [data-product-related-grid] {
    grid-template-columns: minmax(0, 1fr);
  }
}