/* ============================================================
   MEMTEST INDUSTRIAL — Product detail page
   ============================================================ */

/* ---- Product hero ---- */
.pd-hero {
  padding-top: 10rem;
  padding-bottom: 3rem;
  border-bottom: 1px solid var(--ink-line);
}
.pd-hero__breadcrumb {
  margin-bottom: 2.5rem;
}
.pd-hero__grid {
  display: grid;
  grid-template-columns: 1.15fr 1fr;
  gap: clamp(2rem, 5vw, 5rem);
  align-items: start;
}

/* gallery */
.pd-gallery { position: sticky; top: 100px; }
.pd-gallery__main {
  aspect-ratio: 4 / 3;
  background: var(--ink-panel);
  border: 1px solid var(--ink-line);
  position: relative;
  overflow: hidden;
}
.pd-gallery__main img {
  width: 100%; height: 100%; object-fit: cover;
  filter: saturate(0.85) contrast(1.05);
  transition: opacity var(--t-med) var(--ease-out);
}
.pd-gallery__main .corner-label {
  position: absolute;
  top: 1rem; left: 1rem;
  font-family: var(--font-mono);
  font-size: var(--fs-micro);
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--paper);
  background: rgba(8,9,10,0.7);
  backdrop-filter: blur(4px);
  padding: 0.4em 0.7em;
  border: 1px solid var(--ink-line);
}
.pd-gallery__main .zoom-hint {
  position: absolute;
  bottom: 1rem; right: 1rem;
  font-family: var(--font-mono);
  font-size: var(--fs-micro);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--paper-faint);
  display: flex; align-items: center; gap: 0.4em;
}
.pd-gallery__thumbs {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0.75rem;
  margin-top: 0.75rem;
}
.pd-gallery__thumb {
  aspect-ratio: 1;
  background: var(--ink-panel);
  border: 1px solid var(--ink-line);
  overflow: hidden;
  cursor: pointer;
  position: relative;
  transition: border-color var(--t-fast) var(--ease-out);
}
.pd-gallery__thumb img { width: 100%; height: 100%; object-fit: cover; filter: saturate(0.7) brightness(0.85); transition: filter var(--t-fast) var(--ease-out); }
.pd-gallery__thumb:hover { border-color: var(--copper-deep); }
.pd-gallery__thumb:hover img { filter: saturate(0.9) brightness(0.95); }
.pd-gallery__thumb.is-active { border-color: var(--copper); }
.pd-gallery__thumb.is-active img { filter: saturate(1) brightness(1); }

/* product info */
.pd-info { display: flex; flex-direction: column; gap: 1.75rem; }
.pd-info__top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  font-family: var(--font-mono);
  font-size: var(--fs-small);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--paper-faint);
}
.pd-info__sku { color: var(--copper); font-size: 1rem; }
.pd-info__title {
  font-size: var(--fs-h1);
  line-height: 0.98;
  letter-spacing: -0.02em;
}
.pd-info__title em { font-style: italic; color: var(--copper-bright); }
.pd-info__desc { color: var(--paper-dim); font-size: 1.1rem; line-height: 1.55; max-width: 50ch; }

.pd-info__keyspecs {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1px;
  background: var(--ink-line-soft);
  border: 1px solid var(--ink-line-soft);
  margin-top: 0.5rem;
}
.pd-keyspec {
  background: var(--ink-base);
  padding: 1.25rem 1.35rem;
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}
.pd-keyspec__label {
  font-family: var(--font-mono);
  font-size: var(--fs-micro);
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--paper-faint);
}
.pd-keyspec__value {
  font-family: var(--font-display);
  font-size: 1.6rem;
  line-height: 1;
  color: var(--paper);
  font-feature-settings: "lnum", "tnum";
}
.pd-keyspec__value em { color: var(--copper-bright); font-style: italic; font-size: 0.7em; }

.pd-info__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 0.5rem;
}
.pd-info__actions .btn { flex: 1; min-width: 180px; justify-content: center; }

.pd-info__trust {
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
  margin-top: 0.5rem;
  font-family: var(--font-mono);
  font-size: var(--fs-micro);
  letter-spacing: 0.1em;
  color: var(--paper-faint);
  padding-top: 1.25rem;
  border-top: 1px dashed var(--ink-line);
}
.pd-info__trust li { display: flex; align-items: center; gap: 0.6em; }
.pd-info__trust li::before { content: ""; width: 5px; height: 5px; background: var(--copper); display: inline-block; }

@media (max-width: 980px) {
  .pd-hero__grid { grid-template-columns: 1fr; }
  .pd-gallery { position: static; }
}
@media (max-width: 640px) {
  .pd-gallery__thumbs { grid-template-columns: repeat(3, 1fr); }
}
@media (max-width: 520px) {
  .pd-info__keyspecs { grid-template-columns: 1fr; }
  .pd-gallery__thumbs { grid-template-columns: repeat(2, 1fr); }
}

/* ---- Section nav (sticky sub-tabs) ---- */
.pd-tabs {
  position: sticky;
  top: 64px;
  z-index: 40;
  background: rgba(13,14,16,0.94);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--ink-line);
}
@media (max-width: 880px) {
  .pd-tabs { top: 56px; }
}
.pd-tabs__inner {
  display: flex;
  gap: 0;
  overflow-x: auto;
  scrollbar-width: none;
}
.pd-tabs__inner::-webkit-scrollbar { display: none; }
.pd-tab {
  font-family: var(--font-mono);
  font-size: var(--fs-micro);
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--paper-faint);
  padding: 1.1rem 1.5rem;
  border-bottom: 2px solid transparent;
  white-space: nowrap;
  transition: color var(--t-fast) var(--ease-out), border-color var(--t-fast) var(--ease-out);
}
.pd-tab:hover { color: var(--paper); }
.pd-tab.is-active { color: var(--copper); border-bottom-color: var(--copper); }
.pd-tab span { color: var(--paper-ghost); margin-right: 0.5em; }

/* ---- Detail sections ---- */
.pd-section {
  padding-block: clamp(3.5rem, 6vw, 6rem);
  border-bottom: 1px solid var(--ink-line);
}
.pd-section__head {
  display: grid;
  grid-template-columns: 1fr 2fr;
  gap: clamp(2rem, 5vw, 5rem);
  align-items: end;
  margin-bottom: 3rem;
}
.pd-section__num {
  font-family: var(--font-mono);
  font-size: var(--fs-micro);
  letter-spacing: 0.18em;
  color: var(--copper);
  text-transform: uppercase;
}
.pd-section__title { font-size: var(--fs-h2); max-width: 16ch; margin-top: 0.75rem; }
.pd-section__title em { font-style: italic; color: var(--copper-bright); }
.pd-section__intro { color: var(--paper-dim); font-size: 1.05rem; line-height: 1.6; max-width: 56ch; }
@media (max-width: 880px) {
  .pd-section__head { grid-template-columns: 1fr; gap: 1.5rem; }
}

/* ---- Overview features ---- */
.pd-section .spotlight__features {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.5rem;
  margin-top: 1rem;
}
.pd-section .spotlight__feature {
  padding: 2rem;
  border: 1px solid var(--ink-line-soft);
  background: var(--ink-raised);
}
.pd-section .spotlight__feature h4 {
  font-family: var(--font-mono);
  font-size: var(--fs-small);
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--copper);
  margin-bottom: 1rem;
  font-weight: 400;
}
.pd-section .spotlight__feature p {
  color: var(--paper);
  font-size: 1rem;
  line-height: 1.6;
}
@media (max-width: 760px) {
  .pd-section .spotlight__features { grid-template-columns: 1fr; }
}

/* ---- Full spec sheet ---- */
.spec-blocks {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1px;
  background: var(--ink-line-soft);
  border: 1px solid var(--ink-line-soft);
}
.spec-block {
  background: var(--ink-base);
  padding: 2rem;
}
.spec-block h4 {
  font-family: var(--font-mono);
  font-size: var(--fs-micro);
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--copper);
  margin-bottom: 1.5rem;
  font-weight: 400;
  padding-bottom: 0.75rem;
  border-bottom: 1px solid var(--ink-line);
}
@media (max-width: 760px) {
  .spec-blocks { grid-template-columns: 1fr; }
}

/* ---- Architecture diagram ---- */
.pd-arch {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: clamp(2rem, 5vw, 4rem);
  align-items: center;
}
.pd-arch__diagram {
  aspect-ratio: 1 / 1;
  background: var(--ink-void);
  border: 1px solid var(--ink-line);
  padding: 2rem;
  position: relative;
}
.pd-arch__diagram svg { width: 100%; height: 100%; }
.pd-arch__features { display: flex; flex-direction: column; gap: 1.5rem; }
.pd-arch__feature {
  padding-left: 1.25rem;
  border-left: 1px solid var(--ink-line);
}
.pd-arch__feature h4 {
  font-family: var(--font-display);
  font-size: 1.4rem;
  color: var(--paper);
  margin-bottom: 0.5rem;
  font-weight: 400;
}
.pd-arch__feature h4 em { color: var(--copper-bright); font-style: italic; }
.pd-arch__feature p { color: var(--paper-dim); font-size: var(--fs-small); line-height: 1.55; }
@media (max-width: 880px) { .pd-arch { grid-template-columns: 1fr; } }

/* ---- Documents list ---- */
.doc-list {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1px;
  background: var(--ink-line-soft);
  border: 1px solid var(--ink-line-soft);
}
.doc-item {
  background: var(--ink-base);
  padding: 1.5rem;
  display: grid;
  grid-template-columns: 44px 1fr auto;
  gap: 1.25rem;
  align-items: center;
  transition: background var(--t-fast) var(--ease-out);
  cursor: pointer;
}
.doc-item:hover { background: var(--ink-raised); }
.doc-item__icon {
  width: 44px; height: 44px;
  border: 1px solid var(--ink-line);
  display: grid; place-items: center;
  color: var(--copper);
}
.doc-item__icon svg { width: 20px; height: 20px; }
.doc-item__meta h4 {
  font-family: var(--font-body);
  font-size: 0.95rem;
  color: var(--paper);
  font-weight: 500;
  letter-spacing: 0;
  margin-bottom: 0.3rem;
}
.doc-item__meta span {
  font-family: var(--font-mono);
  font-size: var(--fs-micro);
  letter-spacing: 0.1em;
  color: var(--paper-faint);
}
.doc-item__dl {
  font-family: var(--font-mono);
  font-size: var(--fs-micro);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--copper);
}
@media (max-width: 760px) { .doc-list { grid-template-columns: 1fr; } }

/* ---- Related videos on detail page ---- */
.pd-videos {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
}
@media (max-width: 980px) { .pd-videos { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 640px) { .pd-videos { grid-template-columns: 1fr; } }

/* ---- Related products ---- */
.pd-related__grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1rem;
}
@media (max-width: 980px) { .pd-related__grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 520px) { .pd-related__grid { grid-template-columns: 1fr; } }

/* ---- Pinout / mechanical drawing ---- */
.pd-mechanical {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: clamp(2rem, 5vw, 4rem);
}
.pd-mechanical__drawing {
  aspect-ratio: 4 / 3;
  background: var(--ink-void);
  border: 1px solid var(--ink-line);
  padding: 1.5rem;
}
.pd-mechanical__drawing svg { width: 100%; height: 100%; }
.pd-mechanical__table { display: flex; flex-direction: column; gap: 1.25rem; }
@media (max-width: 880px) { .pd-mechanical { grid-template-columns: 1fr; } }

/* ---- Buying panel ---- */
.pd-buy {
  background: var(--ink-void);
  border-block: 1px solid var(--ink-line);
}
.pd-buy__grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: clamp(2rem, 5vw, 4rem);
  align-items: center;
}
.pd-buy__title { font-size: var(--fs-h2); max-width: 18ch; }
.pd-buy__title em { font-style: italic; color: var(--copper-bright); }
.pd-buy__options {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}
.pd-buy__row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem 0;
  border-bottom: 1px solid var(--ink-line-soft);
  font-family: var(--font-mono);
  font-size: var(--fs-small);
  letter-spacing: 0.08em;
}
.pd-buy__row dt { color: var(--paper-faint); text-transform: uppercase; font-size: var(--fs-micro); letter-spacing: 0.14em; }
.pd-buy__row dd { color: var(--paper); }
.pd-buy__row dd b { color: var(--copper-bright); font-weight: 400; }
.pd-buy__actions { display: flex; gap: 0.75rem; margin-top: 1rem; flex-wrap: wrap; }
.pd-buy__actions .btn { flex: 1; min-width: 160px; justify-content: center; }
@media (max-width: 880px) { .pd-buy__grid { grid-template-columns: 1fr; } }