/* ============================================================
   ALTULA — detail.css
   Product detail page: hero, overview, features, specifications,
   scenario gallery, related cases.
   Design tokens & shared components live in common.css;
   header / footer / case-card base styles come from style.css.
   Breakpoints (aligned with style.css):
     < 768px            mobile
     768px — 1024px     tablet portrait
     1024px — 1920px    desktop
     >= 1920px          2K / 4K
   ============================================================ */

/* ============================================================
   Detail hero lead text (hero shell comes from style.css)
   ============================================================ */
.detail-hero__text {
  margin-top: 1.5rem;
  max-width: 42rem;
  font-size: var(--fs-lead);
  line-height: 1.7;
  color: rgba(255, 255, 255, 0.72);
}

/* ============================================================
   1. Overview (image + text)
   ============================================================ */
.detail-overview {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: clamp(2.5rem, 6vw, 6rem);
  align-items: center;
}

.detail-overview__media {
  position: relative;
}

.detail-gallery__main img {
  width: 100%;
  aspect-ratio: 4 / 3.4;
  object-fit: cover;
  border-radius: var(--radius);
  transition: opacity 0.25s ease;
}

.detail-gallery__main img.is-fading {
  opacity: 0;
}

/* Thumbnail strip */
.detail-gallery__thumbs {
  display: grid;
  grid-auto-flow: column;
  grid-auto-columns: 1fr;
  gap: 0.75rem;
  margin-top: 0.75rem;
}

.detail-gallery__thumb {
  overflow: hidden;
  padding: 0;
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  opacity: 0.65;
  transition: opacity var(--transition), border-color var(--transition),
    box-shadow var(--transition);
}

.detail-gallery__thumb img {
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
}

.detail-gallery__thumb:hover {
  opacity: 1;
  border-color: var(--color-gold);
}

.detail-gallery__thumb.is-active {
  opacity: 1;
  border-color: var(--color-gold);
  box-shadow: 0 0 0 1px var(--color-gold);
}

.detail-gallery__thumb:focus-visible {
  outline: 2px solid var(--color-gold);
  outline-offset: 0.2rem;
}

/* Gold frame accent (mirrors the homepage brand media) */


.detail-overview__body .section-title {
  margin-top: 1.125rem;
  margin-bottom: 1.75rem;
}

.detail-overview__text p + p {
  margin-top: 1.25rem;
}

.detail-overview__actions {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 1.5rem;
  margin-top: 2.25rem;
}

/* ============================================================
   2. Features
   ============================================================ */
.feature-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: clamp(1.25rem, 2vw, 2rem);
}

.feature-card {
  padding: clamp(1.5rem, 2.5vw, 2rem);
  background-color: var(--color-white);
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  transition: transform var(--transition), box-shadow var(--transition),
    border-color var(--transition);
}

.feature-card:hover {
  transform: translateY(-0.25rem);
  border-color: var(--color-gold);
  box-shadow: var(--shadow-card);
}

.feature-card__index {
  font-size: 0.8125rem;
  font-weight: 700;
  letter-spacing: 0.2em;
  color: var(--color-gold);
}

.feature-card__title {
  margin-top: 0.75rem;
  font-size: 1.0625rem;
  font-weight: 700;
  line-height: 1.4;
  color: var(--color-ink);
}

.feature-card__text {
  margin-top: 0.5rem;
  font-size: 0.9375rem;
}

/* ============================================================
   3. Specifications (label / value rows, two columns)
   ============================================================ */
.spec-table {
  display: grid;
  grid-template-columns: 1fr 1fr;
  column-gap: clamp(2rem, 5vw, 5rem);
}

.spec-row {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 1.5rem;
  padding: 1.125rem 0;
  border-bottom: 1px solid var(--color-line);
}

.spec-row dt {
  flex-shrink: 0;
  font-size: 0.8125rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-muted);
}

.spec-row dd {
  font-weight: 600;
  text-align: right;
  color: var(--color-ink);
}

/* ============================================================
   4. Scenario gallery (mosaic: first image spans two rows)
   ============================================================ */
.gallery-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr;
  grid-auto-rows: clamp(11rem, 22vw, 17rem);
  gap: clamp(0.75rem, 1.5vw, 1.25rem);
}

.gallery-grid__item {
  position: relative;
  overflow: hidden;
  border-radius: var(--radius);
  background-color: var(--color-line);
}

.gallery-grid__item img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.7s ease;
}

.gallery-grid__item:hover img {
  transform: scale(1.06);
}

.gallery-grid__item--tall {
  grid-row: span 2;
}

/* ============================================================
   Responsive
   ============================================================ */

/* --- 768px — 1024px : tablet portrait --- */
@media (max-width: 64rem) {
  .detail-overview {
    grid-template-columns: 1fr;
  }

  .detail-overview__media {
    max-width: 40rem;
  }

  .feature-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

/* --- < 768px : mobile --- */
@media (max-width: 48rem) {
  .feature-grid,
  .spec-table {
    grid-template-columns: 1fr;
  }

  .gallery-grid {
    grid-template-columns: 1fr;
    grid-auto-rows: 14rem;
  }

  .gallery-grid__item--tall {
    grid-row: auto;
  }

  .spec-row {
    gap: 1rem;
  }
}