/* =========================================================
   Theme tokens
   ========================================================= */
:root {
  --color-bg: #ffffff;
  --color-fg: #111827;
  --color-muted: #6b7280;
  --color-border: #e5e7eb;
  --color-surface: #f9fafb;
  --color-surface-hover: #f3f4f6;
  --color-accent: #ff9900;            /* Amazon-ish orange, distinct enough */
  --color-accent-hover: #e88a00;
  --color-accent-fg: #ffffff;

  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 14px;

  --shadow-card: 0 1px 2px rgba(0,0,0,0.04), 0 4px 12px rgba(0,0,0,0.04);
  --shadow-card-hover: 0 2px 4px rgba(0,0,0,0.06), 0 10px 24px rgba(0,0,0,0.08);

  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue",
               Arial, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;

  --container-max: 1200px;
  --gutter: 16px;
}

/* =========================================================
   Reset / base
   ========================================================= */
* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.5;
  color: var(--color-fg);
  background: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}
a { color: inherit; text-decoration: none; }
a:hover { text-decoration: underline; }
button { font: inherit; cursor: pointer; }
img, video { max-width: 100%; display: block; }

.container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--gutter);
}

/* =========================================================
   Header
   ========================================================= */
.site-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px var(--gutter);
  max-width: var(--container-max);
  margin: 0 auto;
}
.brand {
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: 0.02em;
}
.lang-switcher {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 0.9rem;
}
.lang-btn {
  background: transparent;
  border: 0;
  color: var(--color-muted);
  padding: 4px 6px;
  border-radius: var(--radius-sm);
  transition: color 0.15s, background 0.15s;
}
.lang-btn:hover { color: var(--color-fg); }
.lang-btn.is-active {
  color: var(--color-fg);
  font-weight: 600;
}
.lang-sep { color: var(--color-border); }

/* =========================================================
   Hero
   ========================================================= */
.hero {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 24px var(--gutter) 16px;
}
.hero-tagline {
  font-size: clamp(1.5rem, 3.6vw, 2.25rem);
  font-weight: 700;
  margin: 0;
  letter-spacing: -0.01em;
}
.hero-subheadline {
  font-size: clamp(0.95rem, 1.6vw, 1.05rem);
  color: var(--color-muted);
  margin: 8px 0 0;
  letter-spacing: 0.01em;
}

/* =========================================================
   Categories (filter chips)
   ========================================================= */
.categories {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 8px var(--gutter) 16px;
  display: flex;
  flex-wrap: nowrap;
  gap: 8px;
  overflow-x: auto;
  scroll-snap-type: x proximity;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: none;
  -ms-overflow-style: none;
}
.categories::-webkit-scrollbar { display: none; }
@media (min-width: 641px) {
  .categories { flex-wrap: wrap; overflow-x: visible; }
}
.chip {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  color: var(--color-fg);
  padding: 6px 14px;
  border-radius: 999px;
  font-size: 0.875rem;
  transition: background 0.15s, color 0.15s, border-color 0.15s;
  flex-shrink: 0;
  white-space: nowrap;
  scroll-snap-align: start;
}
.chip:hover { background: var(--color-surface-hover); }
.chip.is-active {
  background: var(--color-fg);
  color: var(--color-bg);
  border-color: var(--color-fg);
}

/* =========================================================
   Products grid + card
   ========================================================= */
.products {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--gutter) 48px;
}
.products-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}
@media (max-width: 1024px) {
  .products-grid { grid-template-columns: repeat(3, 1fr); }
}
@media (max-width: 640px) {
  .products-grid { grid-template-columns: repeat(2, 1fr); gap: 12px; }
}

.empty-state {
  text-align: center;
  color: var(--color-muted);
  padding: 48px 0;
}

.product-card {
  display: flex;
  flex-direction: column;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-card);
  transition: box-shadow 0.2s, transform 0.2s;
}
.product-card:hover {
  box-shadow: var(--shadow-card-hover);
  transform: translateY(-2px);
}

/* Card media (4:3) */
.card-media {
  position: relative;
  aspect-ratio: 4 / 3;
  background: var(--color-surface);
  overflow: hidden;
}
.card-image {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: opacity 0.18s ease-out;
}
.product-card.is-playing .card-image { opacity: 0.92; }

.card-play-hint {
  position: absolute;
  right: 8px;
  bottom: 8px;
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: rgba(0,0,0,0.55);
  color: #fff;
  border: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.75rem;
  pointer-events: none;
  transition: opacity 0.15s, background 0.15s;
}
.product-card:hover .card-play-hint,
.product-card.is-playing .card-play-hint { opacity: 0; }

/* Card body */
.card-body {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 12px 14px 8px;
  flex: 1;
}
.card-category {
  font-size: 0.7rem;
  color: var(--color-muted);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin: 0;
}
.card-name {
  font-size: 1rem;
  font-weight: 600;
  margin: 0;
  line-height: 1.3;
  display: -webkit-box;
  -webkit-line-clamp: 1;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.card-desc {
  font-size: 0.85rem;
  color: var(--color-muted);
  margin: 0;
  line-height: 1.4;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  min-height: calc(1.4em * 2);
}

/* Variant swatches */
.card-variants {
  display: flex;
  align-items: center;
  gap: 8px;
  margin: 8px 0 4px;
  min-height: 22px;
}
.swatch {
  width: 22px;
  height: 22px;
  border-radius: 50%;
  background: var(--swatch-color, #888);
  border: 2px solid transparent;
  box-shadow: inset 0 0 0 1px rgba(0,0,0,0.12);
  padding: 0;
  cursor: pointer;
  transition: transform 0.12s, border-color 0.12s, box-shadow 0.12s;
}
.swatch:hover { transform: scale(1.08); }
.swatch.is-active {
  border-color: var(--color-fg);
  box-shadow: inset 0 0 0 1px rgba(0,0,0,0.12), 0 0 0 2px var(--color-bg);
}

.card-price {
  font-size: 1rem;
  font-weight: 700;
  margin: 4px 0 0;
  color: var(--color-fg);
}
.card-price.is-empty { display: none; }

/* CTA button */
.card-cta {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 2px;
  margin: 8px 14px 14px;
  padding: 10px 14px;
  background: var(--color-accent);
  color: var(--color-accent-fg);
  border-radius: var(--radius-md);
  font-weight: 600;
  font-size: 0.9rem;
  text-align: center;
  transition: background 0.15s;
  align-self: flex-end;
  min-width: 0;
  white-space: nowrap;
  letter-spacing: 0.01em;
}
.card-cta-arrow {
  display: inline-block;
  margin-left: 4px;
  font-weight: 700;
  transform: translateY(-1px);
}
@media (max-width: 640px) {
  .card-cta {
    align-self: stretch;
    margin: 8px 12px 12px;
  }
}

/* =========================================================
   Footer
   ========================================================= */
.site-footer {
  border-top: 1px solid var(--color-border);
  padding: 24px var(--gutter);
  text-align: center;
  color: var(--color-muted);
  font-size: 0.85rem;
}
.site-footer p { margin: 4px 0; }
.site-footer a { color: var(--color-fg); }
.footer-note {
  margin-left: 6px;
  color: var(--color-muted);
  font-size: 0.8rem;
}

/* =========================================================
   Utility
   ========================================================= */
[hidden] { display: none !important; }