*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

:root {
  --bg-primary: #1a1a2e;
  --bg-secondary: #16213e;
  --bg-card: #1f2b47;
  --bg-card-hover: #263352;
  --accent: #f0c040;
  --accent-dim: #c9a235;
  --text-primary: #e8e8e8;
  --text-secondary: #a0a8b8;
  --text-muted: #6b7280;
  --badge-en: #3b82f6;
  --badge-jp: #ef4444;
  --badge-sealed: #8b5cf6;
  --badge-loose: #10b981;
  --stock-low: #ef4444;
  --stock-ok: #10b981;
  --border: rgba(255,255,255,0.06);
  --radius: 12px;
  --radius-sm: 8px;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  background: var(--bg-primary);
  color: var(--text-primary);
  min-height: 100vh;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

/* Header */
.header {
  background: var(--bg-secondary);
  border-bottom: 1px solid var(--border);
  padding: 20px 16px 16px;
  text-align: center;
  z-index: 100;
}

.logo-link {
  display: inline-block;
  text-decoration: none;
}

.logo {
  height: 116px;
  width: auto;
  border-radius: 8px;
}

.header h1 {
  font-size: 1.6rem;
  font-weight: 800;
  color: var(--accent);
  letter-spacing: 0.5px;
}

.header .tagline {
  font-size: 0.85rem;
  color: var(--text-secondary);
  margin-top: 2px;
}

/* Brand Tabs */
.brand-tabs {
  display: flex;
  gap: 0;
  background: var(--bg-secondary);
  border-bottom: 1px solid var(--border);
}

.brand-tab {
  flex: 1;
  padding: 14px 16px;
  border: none;
  background: transparent;
  color: var(--text-secondary);
  font-size: 1rem;
  font-weight: 700;
  cursor: pointer;
  transition: all 0.2s;
  border-bottom: 3px solid transparent;
  text-align: center;
}

.brand-tab:hover {
  color: var(--text-primary);
  background: rgba(255,255,255,0.03);
}

.brand-tab.active {
  color: var(--accent);
  border-bottom-color: var(--accent);
}

/* Filters */
.filters {
  padding: 12px 16px;
  background: var(--bg-secondary);
  border-bottom: 1px solid var(--border);
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  z-index: 99;
}

.filters input,
.filters select {
  flex: 1;
  min-width: 0;
  padding: 10px 12px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--bg-card);
  color: var(--text-primary);
  font-size: 0.9rem;
  outline: none;
  transition: border-color 0.2s;
}

.filters input:focus,
.filters select:focus {
  border-color: var(--accent);
}

.filters input::placeholder {
  color: var(--text-muted);
}

.filter-row {
  display: flex;
  gap: 8px;
  width: 100%;
}

.filter-row select {
  flex: 1;
}

/* Category Tabs */
.category-tabs {
  display: flex;
  gap: 8px;
  padding: 12px 16px;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: none;
  background: var(--bg-primary);
  border-bottom: 1px solid var(--border);
}

.category-tabs::-webkit-scrollbar {
  display: none;
}

.tab {
  flex-shrink: 0;
  padding: 8px 16px;
  border: 1px solid var(--border);
  border-radius: 20px;
  background: var(--bg-card);
  color: var(--text-secondary);
  font-size: 0.8rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s;
  white-space: nowrap;
}

.tab:hover {
  background: var(--bg-card-hover);
  color: var(--text-primary);
}

.tab.active {
  background: var(--accent);
  color: #1a1a2e;
  border-color: var(--accent);
}

/* Stats bar */
.stats-bar {
  padding: 8px 16px;
  font-size: 0.8rem;
  color: var(--text-muted);
  background: var(--bg-primary);
}

/* Product Grid */
.product-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
  padding: 12px 16px;
  max-width: 1200px;
  margin: 0 auto;
}

.product-card {
  background: var(--bg-card);
  border-radius: var(--radius);
  border: 1px solid var(--border);
  padding: 14px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  transition: background 0.2s, transform 0.15s;
}

.product-card:hover {
  background: var(--bg-card-hover);
  transform: translateY(-1px);
}

.product-img {
  width: 100%;
  aspect-ratio: 1;
  border-radius: 8px;
  overflow: hidden;
  background: var(--bg-secondary);
  display: flex;
  align-items: center;
  justify-content: center;
}

.product-img img {
  width: 100%;
  height: 100%;
  object-fit: contain;
}

.product-img-placeholder {
  color: var(--text-muted);
  font-size: 0.75rem;
}

.product-card .badges {
  display: flex;
  gap: 5px;
  flex-wrap: wrap;
}

.badge {
  font-size: 0.65rem;
  font-weight: 700;
  padding: 2px 7px;
  border-radius: 4px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.badge-en { background: var(--badge-en); color: #fff; }
.badge-jp { background: var(--badge-jp); color: #fff; }
.badge-lang { background: #6b7280; color: #fff; }
.badge-etb { background: #8b5cf6; color: #fff; }
.badge-box { background: #3b82f6; color: #fff; }
.badge-bundle { background: #06b6d4; color: #fff; }
.badge-loose { background: #10b981; color: #fff; }
.badge-special { background: #f59e0b; color: #fff; }
.badge-upc { background: #ec4899; color: #fff; }
.badge-poster { background: #8b5cf6; color: #fff; }
.badge-sleeve { background: #6366f1; color: #fff; }
.badge-sticker { background: #14b8a6; color: #fff; }
.badge-default { background: #6b7280; color: #fff; }

.product-card .name {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text-primary);
  line-height: 1.3;
}

.product-card .set-name {
  font-size: 0.75rem;
  color: var(--text-secondary);
}

.product-card .price {
  font-size: 1.25rem;
  font-weight: 800;
  color: var(--accent);
  margin-top: auto;
}

.product-card .stock {
  font-size: 0.75rem;
  font-weight: 600;
}

.stock-ok { color: var(--stock-ok); }
.stock-low { color: var(--stock-low); }

.btn-row {
  display: flex;
  gap: 6px;
}

.product-card .order-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  flex: 1;
  background: #25d366;
  color: #fff;
  border: none;
  border-radius: var(--radius-sm);
  padding: 10px;
  font-size: 0.85rem;
  font-weight: 700;
  cursor: pointer;
  text-decoration: none;
  transition: background 0.2s;
}

.product-card .order-btn:hover {
  background: #1fb855;
}

.order-btn svg {
  width: 16px;
  height: 16px;
  fill: currentColor;
}

.product-card .share-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg-card-hover);
  color: var(--text-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 10px;
  cursor: pointer;
  text-decoration: none;
  transition: background 0.2s, color 0.2s;
}

.product-card .share-btn:hover {
  background: #25d366;
  color: #fff;
  border-color: #25d366;
}

.share-btn svg {
  width: 18px;
  height: 18px;
  fill: currentColor;
}

/* Empty state */
.empty-state {
  grid-column: 1 / -1;
  text-align: center;
  padding: 48px 16px;
  color: var(--text-muted);
}

.empty-state .icon {
  font-size: 2.5rem;
  margin-bottom: 12px;
}

/* Footer */
.footer {
  text-align: center;
  padding: 24px 16px;
  color: var(--text-muted);
  font-size: 0.8rem;
  border-top: 1px solid var(--border);
  margin-top: 24px;
}

.footer a {
  color: #25d366;
  text-decoration: none;
  font-weight: 600;
}

.footer a:hover {
  text-decoration: underline;
}

/* Desktop */
@media (min-width: 640px) {
  .product-grid {
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
    padding: 16px 24px;
  }

  .filters {
    padding: 12px 24px;
  }

  .header {
    padding: 24px;
  }

  .header h1 {
    font-size: 2rem;
  }
}

@media (min-width: 960px) {
  .product-grid {
    grid-template-columns: repeat(4, 1fr);
  }
}

/* Sort dropdown */
.sort-bar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 8px 16px;
}

.sort-bar select {
  padding: 6px 10px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--bg-card);
  color: var(--text-secondary);
  font-size: 0.8rem;
  outline: none;
}

/* Scrollbar */
::-webkit-scrollbar {
  width: 6px;
}
::-webkit-scrollbar-track {
  background: var(--bg-primary);
}
::-webkit-scrollbar-thumb {
  background: var(--bg-card);
  border-radius: 3px;
}