:root {
  --iphone-16-width: 393px;
  --iphone-16-height: 852px;
  --iphone-preview-scale: 1.18;
}

h1,
h2 {
  overflow-wrap: anywhere;
}

/* The desktop preview's "手機" button must emulate the phone breakpoint
   even though the browser window itself remains wide. */
.preview-stage[data-viewport-mode=mobile] {
  width: var(--iphone-16-width);
  max-width: var(--iphone-16-width);
  height: var(--iphone-16-height);
  padding: 0;
  margin: 26px auto 220px;
  transform: scale(var(--iphone-preview-scale));
  transform-origin: top center;
}

.preview-stage[data-viewport-mode=mobile] .shop-page {
  width: var(--iphone-16-width);
  height: var(--iphone-16-height);
  overflow-y: auto;
  overflow-x: hidden;
  overscroll-behavior: contain;
  border-radius: 24px;
  border: 8px solid #111916;
  box-shadow: 0 28px 80px rgba(0, 0, 0, .58);
}

.preview-stage[data-viewport-mode=mobile] .hero,
.preview-stage[data-viewport-mode=mobile] .details-grid {
  grid-template-columns: 1fr;
  gap: 30px;
}

.preview-stage[data-viewport-mode=mobile] .hero {
  grid-template-columns: 1fr;
}

.preview-stage[data-viewport-mode=mobile] .hero,
.preview-stage[data-viewport-mode=mobile] .gallery,
.preview-stage[data-viewport-mode=mobile] .buy-panel,
.preview-stage[data-viewport-mode=mobile] .section-shell {
  min-width: 0;
}

.preview-stage[data-viewport-mode=mobile] .section-shell {
  padding: 46px 18px;
}

.preview-stage[data-viewport-mode=mobile] .hero {
  padding-top: 24px;
}

.preview-stage[data-viewport-mode=mobile] .hero-image-wrap {
  aspect-ratio: 1 / 1.12;
}

.preview-stage[data-viewport-mode=mobile] .thumbnails {
  display: flex;
  width: 100%;
  max-width: 100%;
  overflow-x: auto;
}

.preview-stage[data-viewport-mode=mobile] .thumbnails button {
  flex: 0 0 70px;
}

.preview-stage[data-viewport-mode=mobile] .feature-grid,
.preview-stage[data-viewport-mode=mobile] .steps,
.preview-stage[data-viewport-mode=mobile] .proof-strip > div {
  grid-template-columns: 1fr 1fr;
}

.preview-stage[data-viewport-mode=mobile] .buy-panel {
  padding: 0;
}

html[data-theme=sales] .preview-stage[data-viewport-mode=mobile] .buy-panel {
  padding: 18px;
}

.preview-stage[data-viewport-mode=mobile] .price-card {
  display: grid;
  grid-template-columns: auto 1fr;
  align-items: center;
  min-width: 0;
}

.preview-stage[data-viewport-mode=mobile] .price-label {
  grid-column: 1 / -1;
}

.preview-stage[data-viewport-mode=mobile] .save-badge {
  grid-column: 1 / -1;
  width: max-content;
  max-width: 100%;
  justify-self: start;
  white-space: nowrap;
}

.preview-stage[data-viewport-mode=mobile] #current-price {
  font-size: 40px;
}

.preview-stage[data-viewport-mode=mobile] #compare-price {
  grid-column: 1 / -1;
  justify-self: start;
  white-space: nowrap;
}

.preview-stage[data-viewport-mode=mobile] .order-section {
  padding: 48px 14px;
}

.preview-stage[data-viewport-mode=mobile] .delivery-box,
.preview-stage[data-viewport-mode=mobile] .order-summary {
  align-items: flex-start;
  flex-direction: column;
}

.preview-stage[data-viewport-mode=mobile] .primary-cta {
  font-size: 21px;
}

.cta-pointer {
  line-height: 1;
  animation: cta-nudge 1.2s ease-in-out infinite;
}

@keyframes cta-nudge {
  0%, 100% { transform: translateY(-3px); }
  50% { transform: translateY(4px); }
}

@media (max-width: 760px) {
  .hero,
  .gallery,
  .buy-panel,
  .section-shell { min-width: 0; }
  .thumbnails {
    display: flex;
    width: 100%;
    max-width: 100%;
    overflow-x: auto;
  }
  .thumbnails button { flex: 0 0 70px; }
  .price-card {
    display: grid;
    grid-template-columns: auto 1fr;
    align-items: center;
  }
  .price-label { grid-column: 1 / -1; }
  #current-price { font-size: 40px; }
  #compare-price {
    grid-column: 1 / -1;
    justify-self: start;
    white-space: nowrap;
  }
  .save-badge {
    grid-column: 1 / -1;
    width: max-content;
  }
}

@media (prefers-reduced-motion: reduce) {
  .cta-pointer { animation: none; }
}