/* Product detail: ProductHero, mock UI, tabs content, reviews. */
.product-hero {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--space-xl);
  padding-block: var(--space-lg) var(--space-2xl);
}
.product-hero__copy { display: flex; flex-direction: column; align-items: flex-start; min-width: 0; }
.product-hero__icon {
  display: inline-flex; align-items: center; justify-content: center;
  width: 3.5rem; height: 3.5rem;
  border-radius: var(--radius-lg);
  background: linear-gradient(150deg, var(--color-navy-3) 0%, var(--color-navy) 70%);
  color: var(--color-on-navy);
  box-shadow: var(--shadow-sm);
  margin-bottom: var(--space-lg);
}
.product-hero__title { font-size: var(--text-4xl); letter-spacing: var(--tracking-tight); }
.product-hero__subtitle { margin-top: var(--space-xs); font-size: var(--text-lg); color: var(--color-ink-2); }
.product-hero__rating { display: flex; align-items: center; gap: 0.4rem; margin-top: var(--space-md); font-size: var(--text-sm); color: var(--color-ink-3); }
.product-hero__desc { margin-top: var(--space-lg); max-width: 60ch; font-size: var(--text-sm); color: var(--color-ink-2); }
.product-hero__tags { display: flex; flex-wrap: wrap; gap: 0.4rem; margin-top: var(--space-lg); }
.product-hero__actions { display: flex; flex-wrap: wrap; gap: var(--space-sm); margin-top: var(--space-xl); }
.product-hero__meta {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--space-md) var(--space-lg);
  width: 100%;
  margin-top: var(--space-xl);
  padding-top: var(--space-lg);
  border-top: 1px solid var(--color-line);
}
.product-hero__meta dt { font-size: var(--text-xs); font-weight: 600; letter-spacing: var(--tracking-wide); text-transform: uppercase; color: var(--color-ink-3); }
.product-hero__meta dd { margin-top: 0.2rem; font-size: var(--text-sm); font-weight: 600; }
.product-hero__meta a:hover { color: var(--color-accent); }

/* ---------- Mock: assistant UI in a navy frame ---------- */
.product-hero__visual { min-width: 0; }
.mock {
  position: relative;
  isolation: isolate;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  gap: var(--space-lg);
  min-height: 26rem;
  padding: clamp(1.25rem, 2.5vw, 2rem);
  border-radius: var(--radius-xl);
  color: var(--color-on-navy);
  background: linear-gradient(160deg, var(--color-navy) 0%, var(--color-navy-2) 55%, var(--color-navy-3) 100%);
  box-shadow: var(--shadow-lg);
}
.mock__wave { position: absolute; inset: auto 0 0 0; width: 100%; height: 45%; z-index: -1; }
.mock__wave-a { fill: var(--color-accent); opacity: 0.35; }
.mock__wave-b { fill: var(--color-periwinkle-3); opacity: 0.3; }
.mock__header { display: flex; align-items: center; justify-content: space-between; gap: var(--space-md); }
.mock__title { font-family: var(--font-display); font-size: var(--text-xl); font-weight: 700; letter-spacing: var(--tracking-snug); }
.mock__status {
  display: inline-flex; align-items: center; gap: 0.4rem;
  padding: 0.3rem 0.7rem;
  border-radius: var(--radius-pill);
  border: 1px solid var(--navy-glass-line);
  background: var(--navy-glass-fill);
  font-size: var(--text-xs); font-weight: 600; color: var(--color-on-navy-2);
  white-space: nowrap;
}
.mock__status i { width: 0.45rem; height: 0.45rem; border-radius: 50%; background: var(--color-success); }
.mock__thread { display: flex; flex-direction: column; gap: var(--space-md); }
.mock__msg { display: flex; flex-direction: column; gap: 0.35rem; max-width: 88%; }
.mock__msg--user { align-self: flex-end; align-items: flex-end; }
.mock__who { display: inline-flex; align-items: center; gap: 0.35rem; font-size: var(--text-xs); font-weight: 600; color: var(--color-on-navy-2); }
.mock__bubble {
  padding: 0.75rem 1rem;
  border-radius: var(--radius-lg) var(--radius-lg) var(--radius-xs) var(--radius-lg);
  border: 1px solid var(--navy-glass-line);
  background: var(--navy-glass-fill);
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
  font-size: var(--text-sm);
  font-weight: 500;
}
.mock__result {
  position: relative;
  display: flex; flex-direction: column; gap: 0.5rem;
  padding: 1rem 1.1rem;
  border-radius: var(--radius-lg);
  background: var(--color-surface);
  color: var(--color-ink);
  box-shadow: var(--shadow-md);
}
.mock__row { display: inline-flex; align-items: center; gap: 0.6rem; padding-right: 2rem; font-size: var(--text-sm); font-weight: 500; }
.mock__row .icon { color: var(--color-accent); }
.mock__spark { position: absolute; right: 0.9rem; bottom: 0.9rem; color: var(--color-accent); }

/* ---------- Tabs content ---------- */
.product-tabs { padding-bottom: var(--space-xl); }
.overview { display: grid; grid-template-columns: minmax(0, 1fr); gap: var(--space-xl); }
.overview__title { font-size: var(--text-2xl); max-width: 22ch; }
.overview__text { margin-top: var(--space-md); color: var(--color-ink-2); max-width: 60ch; }
.overview__list { display: grid; gap: var(--space-md); align-content: start; }

.feature-grid { display: grid; grid-template-columns: minmax(0, 1fr); gap: var(--space-md) var(--space-xl); }

.usecase-list { display: grid; }
.usecase {
  display: grid; grid-template-columns: 3rem minmax(0, 1fr); align-items: baseline; gap: var(--space-md);
  padding-block: var(--space-md);
  border-top: 1px solid var(--color-line);
  font-size: var(--text-base);
}
.usecase:last-child { border-bottom: 1px solid var(--color-line); }
.usecase__num { font-family: var(--font-display); font-weight: 700; font-size: var(--text-sm); color: var(--color-accent); font-variant-numeric: tabular-nums; }

.spec { display: grid; }
.spec__row {
  display: grid; grid-template-columns: minmax(0, 1fr); gap: 0.25rem;
  padding-block: var(--space-md);
  border-top: 1px solid var(--color-line);
}
.spec__row:last-child { border-bottom: 1px solid var(--color-line); }
.spec__row dt { font-size: var(--text-sm); font-weight: 600; color: var(--color-ink-2); }
.spec__row dd { font-size: var(--text-base); }

.reviews { display: grid; grid-template-columns: minmax(0, 1fr); gap: var(--space-xl); align-items: start; }
.reviews__score { display: flex; flex-direction: column; align-items: flex-start; gap: 0.35rem; }
.reviews__big { font-family: var(--font-display); font-size: 3.5rem; font-weight: 800; line-height: 1; letter-spacing: var(--tracking-tight); }
.reviews__count { font-size: var(--text-sm); color: var(--color-ink-2); }
.reviews__note {
  display: flex; flex-direction: column; align-items: flex-start; gap: var(--space-md);
  padding: var(--space-lg);
  border-radius: var(--radius-lg);
  background: var(--color-paper-2);
  border: 1px solid var(--color-line);
  font-size: var(--text-sm); color: var(--color-ink-2);
  max-width: 44rem;
}

@media (min-width: 40rem) {
  .product-hero__meta { grid-template-columns: repeat(4, minmax(0, 1fr)); }
  .feature-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .spec__row { grid-template-columns: 14rem minmax(0, 1fr); gap: var(--space-lg); }
  .reviews { grid-template-columns: auto minmax(0, 1fr); gap: var(--space-3xl); }
}
@media (min-width: 64rem) {
  .product-hero { grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: var(--space-3xl); align-items: start; }
  .overview { grid-template-columns: minmax(0, 1.1fr) minmax(0, 1fr); gap: var(--space-3xl); }
}