:root {
  --bg: #0f172a;
  --panel: #1e293b;
  --accent: #38bdf8;
  --success: #22c55e;
  --text: #f8fafc;
  --border: #334155;
  --danger: #ef4444;
}
* { box-sizing: border-box; margin: 0; padding: 0; }
body { font-family: 'Inter', system-ui, sans-serif; background: var(--bg); color: var(--text); min-height: 100vh; display: flex; flex-direction: column; }
header { background: linear-gradient(135deg, #1e293b, #0f172a); padding: 40px 20px; text-align: center; border-bottom: 1px solid var(--border); }
header h1 { color: var(--accent); font-size: 2rem; margin-bottom: 8px; }
header p { color: #94a3b8; font-size: 1.1rem; }
.menu-categorias { display: flex; flex-wrap: wrap; gap: 8px; justify-content: center; padding: 20px; background: var(--panel); border-bottom: 1px solid var(--border); position: sticky; top: 0; z-index: 10; }
.cat-btn { background: transparent; border: 1px solid var(--border); color: var(--text); padding: 10px 18px; border-radius: 8px; cursor: pointer; font-size: 0.85rem; font-weight: 600; transition: 0.2s; }
.cat-btn:hover { background: var(--border); border-color: var(--accent); color: var(--accent); }
.container { max-width: 1200px; margin: 0 auto; padding: 30px 20px; flex: 1; }
.category-block { margin-bottom: 40px; }
.category-header { font-size: 1.5rem; font-weight: 800; color: var(--accent); padding-bottom: 12px; border-bottom: 2px solid var(--accent); margin-bottom: 20px; letter-spacing: 1px; }
.grid-interna { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.card { background: var(--panel); border-radius: 12px; border: 1px solid var(--border); padding: 16px; display: flex; flex-direction: column; transition: transform 0.2s, border-color 0.2s; height: 100%; }
.card:hover { transform: translateY(-4px); border-color: var(--accent); }
.product-image { width: 100%; height: 180px; object-fit: contain; background: #fff; border-radius: 8px; margin-bottom: 12px; }
.product-title { font-size: 0.85rem; font-weight: 500; line-height: 1.4; color: var(--text); margin-bottom: 10px; flex: 1; display: -webkit-box; -webkit-line-clamp: 4; -webkit-box-orient: vertical; overflow: hidden; }
.product-price { margin-bottom: 12px; font-size: 1.1rem; }
.normal-price { color: #94a3b8; font-size: 0.95rem; }
.old-price { color: var(--danger); text-decoration: line-through; font-size: 0.9rem; margin-right: 8px; }
.new-price { color: var(--success); font-weight: 800; font-size: 1.3rem; }
.buy-button { display: block; background: var(--accent); color: #000; text-align: center; padding: 12px; border-radius: 8px; font-weight: 700; text-decoration: none; transition: 0.2s; margin-top: auto; }
.buy-button:hover { filter: brightness(1.1); }
.offer-timer { text-align: center; font-size: 0.85rem; color: var(--accent); margin-top: 8px; font-weight: 600; font-variant-numeric: tabular-nums; }
footer { text-align: center; padding: 20px; color: #64748b; font-size: 0.8rem; border-top: 1px solid var(--border); margin-top: auto; }
@media (min-width: 601px) {
  .container { max-width: none; margin: 0; }
  .grid-interna { display: flex; flex-wrap: wrap; gap: 20px; justify-content: flex-start; }
  .card { width: 200px; flex-shrink: 0; }
}
@media (max-width: 600px) {
  .category-block { padding: 0 12px; }
  header h1 { font-size: 1.5rem; }
  .container { padding: 20px 12px; }
  .card { padding: 12px; }
  .product-image { height: 130px; }
}