:root {
  --bg-primary: #FAFAFA;
  --bg-card: #FFFFFF;
  --bg-secondary: #F2F4F7;
  --text-primary: #121212;
  --text-muted: #666666;
  --border-color: #E2E8F0;
  --accent-gold: #C5A059;
  --accent-gold-hover: #B08B45;
  --badge-in-stock: #10B981;
  --badge-out-stock: #EF4444;
  --shadow: 0 4px 12px rgba(0, 0, 0, 0.05);
}

[data-theme="dark"] {
  --bg-primary: #0F1115;
  --bg-card: #181B20;
  --bg-secondary: #22262F;
  --text-primary: #F3F4F6;
  --text-muted: #9CA3AF;
  --border-color: #2D333F;
  --accent-gold: #D4AF37;
  --accent-gold-hover: #C5A059;
  --shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
}

* { box-sizing: border-box; margin: 0; padding: 0; transition: background-color 0.2s, color 0.2s; }
body { font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif; background-color: var(--bg-primary); color: var(--text-primary); line-height: 1.5; }

/* Header & Top Bar */
header { background: var(--bg-card); border-bottom: 1px solid var(--border-color); position: sticky; top: 0; z-index: 100; box-shadow: var(--shadow); }
.top-bar { display: flex; justify-content: space-between; align-items: center; padding: 0.5rem 2rem; border-bottom: 1px solid var(--border-color); font-size: 0.85rem; background: var(--bg-secondary); }
.top-controls { display: flex; gap: 1rem; align-items: center; }
.main-nav { display: flex; justify-content: space-between; align-items: center; padding: 1rem 2rem; }
.brand-logo { font-size: 1.5rem; font-weight: 700; color: var(--text-primary); text-decoration: none; letter-spacing: 1px; }
.brand-logo span { color: var(--accent-gold); }

.nav-links { display: flex; gap: 1.5rem; list-style: none; }
.nav-links a { color: var(--text-primary); text-decoration: none; font-weight: 500; }
.nav-links a:hover { color: var(--accent-gold); }

/* Controls & Buttons */
button, select, input { font-family: inherit; }
.btn { background: var(--accent-gold); color: #fff; border: none; padding: 0.6rem 1.2rem; border-radius: 4px; font-weight: 600; cursor: pointer; text-decoration: none; display: inline-block; }
.btn:hover { background: var(--accent-gold-hover); }
.btn-outline { background: transparent; border: 1px solid var(--border-color); color: var(--text-primary); }
.btn-outline:hover { border-color: var(--accent-gold); color: var(--accent-gold); }

/* Layout Grid */
.container { max-width: 1300px; margin: 2rem auto; padding: 0 1.5rem; }
.shop-layout { display: grid; grid-template-columns: 260px 1fr; gap: 2rem; margin-top: 1.5rem; }

/* Filters Sidebar */
.filter-card { background: var(--bg-card); border: 1px solid var(--border-color); border-radius: 8px; padding: 1.25rem; }
.filter-group { margin-bottom: 1.5rem; }
.filter-group h4 { font-size: 0.95rem; margin-bottom: 0.75rem; color: var(--accent-gold); text-transform: uppercase; letter-spacing: 0.5px; }
.filter-group label { display: block; margin-bottom: 0.5rem; font-size: 0.9rem; cursor: pointer; }

/* Controls Header */
.catalog-toolbar { display: flex; justify-content: space-between; align-items: center; background: var(--bg-card); padding: 1rem; border-radius: 8px; border: 1px solid var(--border-color); margin-bottom: 1.5rem; }
.search-input { width: 300px; padding: 0.5rem 0.75rem; border: 1px solid var(--border-color); background: var(--bg-primary); color: var(--text-primary); border-radius: 4px; }

/* Product Display - Grid View */
.product-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(240px, 1fr)); gap: 1.5rem; }
.product-card { background: var(--bg-card); border: 1px solid var(--border-color); border-radius: 8px; padding: 1rem; display: flex; flex-direction: column; justify-content: space-between; box-shadow: var(--shadow); position: relative; }
.product-badge { position: absolute; top: 10px; right: 10px; font-size: 0.7rem; padding: 2px 6px; border-radius: 3px; color: #fff; font-weight: bold; }
.badge-in { background: var(--badge-in-stock); }
.badge-out { background: var(--badge-out-stock); }
.product-img { width: 100%; height: 180px; object-fit: contain; margin-bottom: 1rem; background: #fff; border-radius: 4px; padding: 0.5rem; }
.product-title { font-size: 0.95rem; font-weight: 600; margin-bottom: 0.5rem; line-height: 1.3; }
.product-meta { font-size: 0.8rem; color: var(--text-muted); margin-bottom: 0.5rem; }
.product-price { font-size: 1.1rem; font-weight: 700; color: var(--accent-gold); margin-bottom: 0.75rem; }

/* Product Display - B2B Table Matrix View */
.product-table-wrapper { overflow-x: auto; background: var(--bg-card); border-radius: 8px; border: 1px solid var(--border-color); }
.product-table { width: 100%; border-collapse: collapse; text-align: left; font-size: 0.85rem; }
.product-table th, .product-table td { padding: 0.85rem 1rem; border-bottom: 1px solid var(--border-color); }
.product-table th { background: var(--bg-secondary); color: var(--text-muted); text-transform: uppercase; font-size: 0.75rem; letter-spacing: 0.5px; }

.qty-input { width: 65px; padding: 0.3rem; border: 1px solid var(--border-color); background: var(--bg-primary); color: var(--text-primary); border-radius: 4px; text-align: center; }

/* Cart Drawer */
.cart-drawer { position: fixed; top: 0; right: -420px; width: 400px; height: 100vh; background: var(--bg-card); border-left: 1px solid var(--border-color); z-index: 1000; box-shadow: -5px 0 25px rgba(0,0,0,0.2); transition: right 0.3s ease; display: flex; flex-direction: column; }
.cart-drawer.open { right: 0; }
.cart-header { padding: 1.25rem; border-bottom: 1px solid var(--border-color); display: flex; justify-content: space-between; align-items: center; }
.cart-body { flex: 1; overflow-y: auto; padding: 1.25rem; }
.cart-footer { padding: 1.25rem; border-top: 1px solid var(--border-color); background: var(--bg-secondary); }

.cost-calculator { background: var(--bg-primary); padding: 0.75rem; border-radius: 6px; font-size: 0.85rem; margin-top: 0.5rem; }
.calc-row { display: flex; justify-content: space-between; margin-bottom: 0.3rem; }
.calc-row.total { font-weight: bold; font-size: 1rem; color: var(--accent-gold); border-top: 1px solid var(--border-color); padding-top: 0.5rem; margin-top: 0.5rem; }