/* ============================================================
   MIST.HK — product detail pages
   ============================================================ */

.product-page {
  padding: 60px 32px 90px;
  background: var(--bg);
}
.product-inner { max-width: 1200px; margin: 0 auto; }

.crumb {
  font-size: 13px; color: var(--mute);
  margin-bottom: 32px;
}
.crumb a { color: var(--mute); transition: color .2s; }
.crumb a:hover { color: var(--brand-deep); }
.crumb .sep { margin: 0 8px; }
.crumb .here { color: var(--text); font-weight: 600; }

.product-hero {
  display: grid; grid-template-columns: 1fr 1fr; gap: 60px;
  margin-bottom: 80px;
  align-items: start;
}

.gallery-main {
  aspect-ratio: 1;
  border-radius: var(--r-xl); overflow: hidden;
  background: var(--surface);
  border: 1px solid var(--line-soft);
  position: relative;
  margin-bottom: 12px;
  box-shadow: var(--shadow-sm);
}
.gallery-main img {
  width: 100%; height: 100%;
  object-fit: contain;
  padding: 28px;
  transition: transform .4s ease;
}
.gallery-cmh {
  position: absolute; top: 22px; left: 22px;
  background: var(--text);
  color: white;
  padding: 9px 16px; border-radius: 999px;
  font-size: 12px; font-weight: 700;
  letter-spacing: .03em;
  z-index: 2;
}
.gallery-thumbs {
  display: grid; grid-template-columns: repeat(5, 1fr); gap: 8px;
}
.gallery-thumbs button {
  aspect-ratio: 1; border-radius: var(--r-sm); overflow: hidden;
  border: 2px solid transparent; background: var(--surface);
  cursor: pointer; padding: 4px;
  transition: border-color .2s;
}
.gallery-thumbs button.active { border-color: var(--brand); }
.gallery-thumbs button img { width: 100%; height: 100%; object-fit: contain; }

.product-info .eyebrow {
  font-size: 13px; font-weight: 600; letter-spacing: .08em;
  text-transform: uppercase; color: var(--brand-deep);
  margin-bottom: 14px;
  display: inline-flex; align-items: center; gap: 10px;
}
.product-info .eyebrow::before {
  content: ''; width: 22px; height: 2px;
  background: var(--brand); border-radius: 2px;
}
.product-info h1 {
  font-family: var(--display);
  font-size: clamp(34px, 4vw, 52px);
  font-weight: 700; letter-spacing: -.022em; line-height: 1.06;
  margin-bottom: 14px;
}
.product-info .desc {
  font-size: 17px; color: var(--text-2);
  line-height: 1.6; margin: 18px 0 28px;
}

.spec-strip {
  display: grid; grid-template-columns: repeat(2, 1fr);
  gap: 0; margin: 28px 0;
  background: var(--surface);
  border: 1px solid var(--line-soft);
  border-radius: var(--r-md);
  overflow: hidden;
}
.spec-cell {
  padding: 20px 22px;
  border-right: 1px solid var(--line-soft);
  border-bottom: 1px solid var(--line-soft);
}
.spec-cell:nth-child(2n) { border-right: none; }
.spec-cell:nth-last-child(-n+2) { border-bottom: none; }
.spec-cell .k {
  font-size: 11px; font-weight: 600; letter-spacing: .06em;
  text-transform: uppercase;
  color: var(--mute); margin-bottom: 6px;
}
.spec-cell .v {
  font-family: var(--display); font-weight: 700;
  font-size: 18px; color: var(--text); letter-spacing: -.01em;
}

.cta-row { display: flex; gap: 12px; flex-wrap: wrap; margin: 28px 0; }

.feature-list { margin: 36px 0; }
.feature-list h3 {
  font-size: 13px; font-weight: 600; letter-spacing: .08em;
  text-transform: uppercase; color: var(--brand-deep);
  margin-bottom: 16px;
}
.feature-list ul {
  list-style: none;
  display: grid; grid-template-columns: 1fr 1fr; gap: 8px;
}
.feature-list li {
  padding: 10px 0;
  display: flex; gap: 12px; align-items: center;
  color: var(--text-2);
  font-size: 14.5px;
}
.feature-list li::before {
  content: '✓'; color: var(--brand-deep);
  font-weight: 700;
  flex: none;
}

.spec-big {
  margin: 0 0 80px;
  padding: 56px 48px;
  background: var(--surface);
  border: 1px solid var(--line-soft);
  border-radius: var(--r-xl);
  box-shadow: var(--shadow-sm);
}
.spec-big h2 {
  font-family: var(--display); font-size: 32px;
  font-weight: 700; letter-spacing: -.02em;
  margin-bottom: 32px;
}
.spec-big h2 em { font-family: var(--serif); font-style: italic; font-weight: 400; color: var(--brand-deep); }
.spec-grid {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 16px;
}
.spec-grid .item {
  padding: 20px; background: var(--bg);
  border: 1px solid var(--line-soft); border-radius: var(--r-md);
  transition: border-color .2s;
}
.spec-grid .item:hover { border-color: var(--brand); }
.spec-grid .k {
  font-size: 11px; color: var(--mute);
  margin-bottom: 6px; font-weight: 600;
  letter-spacing: .04em; text-transform: uppercase;
}
.spec-grid .v {
  font-family: var(--display); font-weight: 700; font-size: 18px;
  color: var(--text); letter-spacing: -.01em;
}

.related {
  padding: 90px 32px;
  background: var(--surface);
  border-top: 1px solid var(--line-soft);
}
.related-inner { max-width: 1280px; margin: 0 auto; }
.related h2 {
  font-family: var(--display); font-size: clamp(28px, 3.5vw, 40px);
  font-weight: 700; letter-spacing: -.022em; margin-bottom: 36px;
}
.related h2 em { font-family: var(--serif); font-style: italic; font-weight: 400; color: var(--brand-deep); }
.related-grid {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 16px;
}
.related-card {
  background: var(--bg);
  border: 1px solid var(--line-soft);
  border-radius: var(--r-md);
  padding: 14px;
  transition: border-color .2s, transform .2s, box-shadow .2s;
}
.related-card:hover { border-color: var(--brand); transform: translateY(-3px); box-shadow: var(--shadow-sm); }
.related-card .img-wrap {
  aspect-ratio: 1; border-radius: var(--r-sm); overflow: hidden;
  background: var(--surface); margin-bottom: 12px;
  border: 1px solid var(--line-soft);
}
.related-card img { width: 100%; height: 100%; object-fit: contain; padding: 8px; }
.related-card .cmh {
  font-size: 11px; font-weight: 700; color: var(--brand-deep);
  margin-bottom: 4px; letter-spacing: .03em;
}
.related-card h4 { font-family: var(--display); font-size: 16px; font-weight: 700; letter-spacing: -.01em; }

@media (max-width: 900px) {
  .product-page { padding: 40px 20px 60px; }
  .product-hero { grid-template-columns: 1fr; gap: 28px; margin-bottom: 56px; }
  .feature-list ul { grid-template-columns: 1fr; }
  .spec-big { padding: 32px 24px; }
  .related { padding: 60px 20px; }
}