:root {
            --amarillo: #fed700;
            --negro: #000000;
            --gris: #f8f9fa;
        }
        
        body {
            font-family: 'Roboto', sans-serif;
        }
        
        .bg-amarillo {
            background-color: var(--amarillo);
        }
        
        .bg-negro {
            background-color: var(--negro);
        }
        
        .text-amarillo {
            color: var(--amarillo);
        }
        
        .hero-section {
            background-color: var(--negro);
            color: white;
            padding: 60px 0;
            text-align: center;
        }
        
        .category-card {
            background: white;
            border-radius: 5px;
            padding: 20px;
            text-align: center;
            height: 100%;
            transition: all 0.3s;
        }
        
        .category-card:hover {
            transform: translateY(-5px);
            box-shadow: 0 10px 20px rgba(0,0,0,0.1);
        }
        
        .product-card {
            border: 1px solid #eee;
            border-radius: 5px;
            overflow: hidden;
            margin-bottom: 20px;
            transition: all 0.3s;
        }
        
        .product-card:hover {
            box-shadow: 0 5px 15px rgba(0,0,0,0.1);
        }
        
        .product-card img {
            width: 100%;
            height: auto;
        }
        
        .product-card-body {
            padding: 15px;
        }
        
        .badge-used {
            background-color: #6c757d;
        }
        
        .badge-new {
            background-color: #28a745;
        }
        
        .navbar-dark .navbar-nav .nav-link {
            color: rgba(255,255,255,.8);
        }
        
        .navbar-dark .navbar-nav .nav-link:hover {
            color: var(--amarillo);
        }
        .bg-gradient-categorias {
            background: linear-gradient(135deg, #1e3c72 0%, #2a5298 100%);
        }
        
        .btn-categoria:hover, .btn-categoria-mas:hover {
            transform: translateY(-3px);
            box-shadow: 0 5px 15px rgba(0,0,0,0.3);
        }
        
        .btn-categoria-mas {
            position: relative;
        }