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

        :root {
            --primary: #1a5f7a;
            --primary-dark: #0d4c65;
            --primary-light: #2a7a9a;
            --secondary: #57cc99;
            --secondary-dark: #38b2ac;
            --accent: #ff9f1c;
            --accent-light: #ffbf69;
            --text-dark: #2c3e50;
            --text-light: #5d6d7e;
            --bg-light: #f8f9fa;
            --bg-white: #ffffff;
            --border: #e0e6d3;
            --success: #27ae60;
            --shadow: 0 4px 20px rgba(0,0,0,0.08);
            --shadow-light: 0 2px 10px rgba(0,0,0,0.05);
            --radius: 12px;
            --transition: all 0.3s ease;
        }

        body {
            font-family: 'Montserrat', sans-serif;
            background: var(--bg-light);
            color: var(--text-dark);
            line-height: 1.6;
        }

        /* Header */
        .header {
            background: var(--bg-white);
            box-shadow: var(--shadow);
            position: sticky;
            top: 0;
            z-index: 1000;
        }

        .header-content {
            max-width: 1400px;
            margin: 0 auto;
            padding: 20px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 20px;
        }

        .logo {
            font-size: 28px;
            font-weight: 700;
            color: var(--primary);
            text-decoration: none;
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .logo i {
            color: var(--accent);
        }

        .logo span {
            color: var(--accent);
        }

        .header-search {
            flex: 1;
            max-width: 500px;
            display: flex;
            position: relative;
        }

        .header-search input {
            flex: 1;
            padding: 14px 20px;
            border: 2px solid var(--border);
            border-radius: 30px;
            font-size: 15px;
            background: var(--bg-light);
            transition: var(--transition);
        }

        .header-search input:focus {
            outline: none;
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(26, 95, 122, 0.1);
        }

        .header-search button {
            position: absolute;
            right: 5px;
            top: 5px;
            bottom: 5px;
            padding: 0 20px;
            background: var(--primary);
            border: none;
            border-radius: 25px;
            color: white;
            cursor: pointer;
            transition: var(--transition);
        }

        .header-search button:hover {
            background: var(--primary-dark);
        }

        .back-home {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            padding: 12px 25px;
            background: var(--primary);
            color: white;
            text-decoration: none;
            border-radius: 30px;
            transition: var(--transition);
            font-weight: 500;
        }

        .back-home:hover {
            background: var(--primary-dark);
            transform: translateY(-2px);
        }

        /* Page Hero */
        .page-hero {
            background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 50%, var(--primary-light) 100%);
            color: white;
            padding: 80px 20px;
            text-align: center;
            position: relative;
            overflow: hidden;
        }

        .page-hero::before {
            content: "";
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100" preserveAspectRatio="none"><path d="M0,0 L100,0 L100,100 Z" fill="rgba(255,255,255,0.05)"/></svg>');
            background-size: cover;
        }

        .page-hero h1 {
            font-size: 48px;
            margin-bottom: 15px;
            position: relative;
            text-shadow: 0 2px 10px rgba(0,0,0,0.2);
        }

        .page-hero p {
            font-size: 18px;
            opacity: 0.9;
            max-width: 600px;
            margin: 0 auto;
            position: relative;
        }

        /* Container */
        .container {
            max-width: 1400px;
            margin: 0 auto;
            padding: 40px 20px;
        }

        /* Sidebar and Content Layout */
        .catalog-layout {
            display: grid;
            grid-template-columns: 300px 1fr;
            gap: 40px;
        }

        /* Sidebar Filters */
        .sidebar {
            position: sticky;
            top: 100px;
            height: fit-content;
        }

        .filter-section {
            background: var(--bg-white);
            border-radius: var(--radius);
            padding: 25px;
            margin-bottom: 25px;
            box-shadow: var(--shadow-light);
            border-left: 4px solid var(--primary);
            transition: var(--transition);
        }

        .filter-section:hover {
            box-shadow: var(--shadow);
        }

        .filter-section h3 {
            font-size: 18px;
            color: var(--primary);
            margin-bottom: 20px;
            display: flex;
            align-items: center;
            gap: 10px;
            font-weight: 600;
        }

        .filter-group {
            margin-bottom: 15px;
        }

        .filter-option {
            display: flex;
            align-items: center;
            gap: 12px;
            padding: 12px;
            border-radius: 8px;
            cursor: pointer;
            transition: var(--transition);
        }

        .filter-option:hover {
            background: rgba(26, 95, 122, 0.05);
        }

        .filter-option input[type="checkbox"] {
            width: 18px;
            height: 18px;
            cursor: pointer;
            accent-color: var(--primary);
        }

        .filter-option label {
            flex: 1;
            cursor: pointer;
            font-size: 15px;
            color: var(--text-light);
            font-weight: 500;
        }

        /* Price Filter */
        .price-range {
            display: flex;
            flex-direction: column;
            gap: 15px;
        }

        .price-inputs {
            display: flex;
            gap: 10px;
        }

        .price-inputs input {
            flex: 1;
            padding: 12px;
            border: 2px solid var(--border);
            border-radius: 8px;
            font-size: 14px;
            transition: var(--transition);
        }

        .price-inputs input:focus {
            outline: none;
            border-color: var(--primary);
        }

        /* Sliders para precio */
        .price-slider-container {
            position: relative;
            height: 40px;
            margin: 15px 0;
        }

        .price-slider-track {
            position: absolute;
            top: 50%;
            left: 0;
            right: 0;
            height: 6px;
            background: var(--border);
            border-radius: 3px;
            transform: translateY(-50%);
        }

        .price-slider-fill {
            position: absolute;
            height: 6px;
            background: var(--primary);
            border-radius: 3px;
        }

        .price-slider {
            position: absolute;
            top: 50%;
            width: 100%;
            height: 6px;
            margin: 0;
            transform: translateY(-50%);
            -webkit-appearance: none;
            background: transparent;
            pointer-events: none;
            z-index: 2;
        }

        .price-slider::-webkit-slider-thumb {
            -webkit-appearance: none;
            width: 20px;
            height: 20px;
            border-radius: 50%;
            background: var(--primary);
            cursor: pointer;
            pointer-events: auto;
            border: 3px solid white;
            box-shadow: 0 2px 5px rgba(0,0,0,0.2);
        }

        .price-slider::-moz-range-thumb {
            width: 20px;
            height: 20px;
            border-radius: 50%;
            background: var(--primary);
            cursor: pointer;
            pointer-events: auto;
            border: 3px solid white;
            box-shadow: 0 2px 5px rgba(0,0,0,0.2);
        }

        /* Presets de precio */
        .price-presets {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 10px;
            margin: 15px 0;
        }

        .price-preset {
            padding: 10px;
            background-color: #f1f8ff;
            border: 1px solid var(--border);
            border-radius: 6px;
            text-align: center;
            cursor: pointer;
            font-size: 13px;
            transition: var(--transition);
            font-weight: 500;
        }

        .price-preset:hover {
            background-color: #e3f2fd;
        }

        .price-preset.active {
            background-color: var(--primary);
            color: white;
            border-color: var(--primary);
        }

        .price-display {
            text-align: center;
            font-size: 14px;
            color: var(--text-light);
            margin: 10px 0;
            font-weight: 500;
        }

        .currency {
            font-size: 12px;
            color: var(--text-light);
            margin-left: 2px;
        }

        .apply-filters-btn {
            width: 100%;
            padding: 14px;
            background: var(--primary);
            color: white;
            border: none;
            border-radius: 8px;
            font-weight: 600;
            cursor: pointer;
            transition: var(--transition);
            margin-top: 15px;
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
        }

        .apply-filters-btn:hover {
            background: var(--primary-dark);
            transform: translateY(-2px);
        }

        .clear-filters-btn {
            width: 100%;
            padding: 14px;
            background: #f1f8ff;
            color: var(--primary);
            border: 2px solid var(--border);
            border-radius: 8px;
            font-weight: 600;
            cursor: pointer;
            transition: var(--transition);
            margin-top: 10px;
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
        }

        .clear-filters-btn:hover {
            background: #e3f2fd;
            border-color: var(--primary-light);
        }

        /* Main Content */
        .catalog-header {
            display: flex;
            justify-content: space-between;
            align-items: center;
            margin-bottom: 30px;
            flex-wrap: wrap;
            gap: 20px;
        }

        .results-info {
            font-size: 16px;
            color: var(--text-light);
        }

        .results-info strong {
            color: var(--primary);
        }

        .sort-options {
            display: flex;
            align-items: center;
            gap: 15px;
        }

        .sort-options label {
            font-weight: 500;
            color: var(--text-dark);
        }

        .sort-options select {
            padding: 12px 15px;
            border: 2px solid var(--border);
            border-radius: 8px;
            font-size: 14px;
            cursor: pointer;
            background: var(--bg-white);
            transition: var(--transition);
        }

        .sort-options select:focus {
            outline: none;
            border-color: var(--primary);
        }

        .view-toggle {
            display: flex;
            gap: 10px;
            background: var(--bg-white);
            padding: 5px;
            border-radius: 10px;
            box-shadow: var(--shadow-light);
        }

        .view-btn {
            padding: 10px 15px;
            background: transparent;
            border: none;
            border-radius: 8px;
            cursor: pointer;
            transition: var(--transition);
            color: var(--text-light);
        }

        .view-btn.active {
            background: var(--primary);
            color: white;
        }

        /* Active Filters */
        .active-filters {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
            margin-bottom: 25px;
        }

        .filter-tag {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 10px 16px;
            background: var(--primary);
            color: white;
            border-radius: 20px;
            font-size: 14px;
            font-weight: 500;
            transition: var(--transition);
        }

        .filter-tag:hover {
            background: var(--primary-dark);
        }

        .filter-tag i {
            cursor: pointer;
            opacity: 0.8;
            transition: var(--transition);
        }

        .filter-tag i:hover {
            opacity: 1;
            transform: scale(1.1);
        }

        /* Products Grid */
        .products-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
            gap: 30px;
        }

        .products-grid.list-view {
            grid-template-columns: 1fr;
        }

        .product-card {
            background: var(--bg-white);
            border-radius: var(--radius);
            overflow: hidden;
            box-shadow: var(--shadow-light);
            transition: var(--transition);
            display: flex;
            flex-direction: column;
            position: relative;
            border: 1px solid var(--border);
        }

        .products-grid.list-view .product-card {
            flex-direction: row;
        }

        .product-card:hover {
            transform: translateY(-8px);
            box-shadow: 0 15px 30px rgba(0,0,0,0.15);
        }

        .product-image {
            position: relative;
            height: 250px;
            overflow: hidden;
            background: #f8f9fa;
        }

        .products-grid.list-view .product-image {
            width: 300px;
            height: auto;
        }

        .product-image img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: var(--transition);
        }

        .product-card:hover .product-image img {
            transform: scale(1.08);
        }

        .product-badge {
            position: absolute;
            top: 15px;
            right: 15px;
            background: var(--accent);
            color: white;
            padding: 6px 16px;
            border-radius: 20px;
            font-size: 12px;
            font-weight: 600;
            z-index: 2;
        }

        .product-badge.new {
            background: var(--primary);
        }

        .product-badge.sale {
            background: var(--accent);
        }

        .product-badge.popular {
            background: #f39c12;
        }

        .product-info {
            padding: 25px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }

        .product-brand {
            color: var(--primary);
            font-size: 12px;
            text-transform: uppercase;
            letter-spacing: 1px;
            margin-bottom: 8px;
            font-weight: 600;
        }

        .product-name {
            font-size: 18px;
            font-weight: 600;
            color: var(--text-dark);
            margin-bottom: 12px;
            line-height: 1.4;
        }

        .product-description {
            font-size: 14px;
            color: var(--text-light);
            margin-bottom: 20px;
            line-height: 1.6;
            flex: 1;
        }

        .product-price {
            font-size: 28px;
            font-weight: 700;
            color: var(--primary);
            margin-bottom: 20px;
        }

        .old-price {
            font-size: 18px;
            color: #95a5a6;
            text-decoration: line-through;
            margin-left: 10px;
        }

        .product-actions {
            display: flex;
            gap: 12px;
        }

        .btn-details {
            flex: 1;
            padding: 14px;
            background: #f1f8ff;
            color: var(--primary);
            text-align: center;
            border-radius: 8px;
            text-decoration: none;
            font-weight: 600;
            transition: var(--transition);
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            border: 2px solid transparent;
        }

        .btn-details:hover {
            background: #e3f2fd;
            border-color: var(--primary-light);
        }

        .btn-whatsapp {
            flex: 1;
            padding: 14px;
            background: var(--success);
            color: white;
            text-align: center;
            border-radius: 8px;
            text-decoration: none;
            font-weight: 600;
            transition: var(--transition);
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
        }

        .btn-whatsapp:hover {
            background: #219653;
            transform: translateY(-2px);
        }

        /* Pagination */
        .pagination {
            display: flex;
            justify-content: center;
            align-items: center;
            gap: 10px;
            margin-top: 50px;
        }

        .pagination-btn {
            padding: 12px 20px;
            background: var(--bg-white);
            border: 2px solid var(--border);
            border-radius: 8px;
            color: var(--text-dark);
            font-weight: 600;
            cursor: pointer;
            transition: var(--transition);
        }

        .pagination-btn:hover:not(.active):not(:disabled) {
            background: #f1f8ff;
            border-color: var(--primary-light);
        }

        .pagination-btn.active {
            background: var(--primary);
            border-color: var(--primary);
            color: white;
        }

        .pagination-btn:disabled {
            opacity: 0.5;
            cursor: not-allowed;
        }

        /* Empty State */
        .empty-state {
            text-align: center;
            padding: 80px 20px;
        }

        .empty-state i {
            font-size: 80px;
            color: #d1d9c8;
            margin-bottom: 20px;
        }

        .empty-state h3 {
            font-size: 24px;
            color: var(--text-dark);
            margin-bottom: 10px;
        }

        .empty-state p {
            color: var(--text-light);
        }

        /* WhatsApp Float */
        .whatsapp-float {
            position: fixed;
            bottom: 30px;
            right: 30px;
            width: 60px;
            height: 60px;
            background: var(--success);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            color: white;
            font-size: 30px;
            box-shadow: 0 5px 20px rgba(37, 211, 102, 0.5);
            z-index: 999;
            transition: var(--transition);
            text-decoration: none;
        }

        .whatsapp-float:hover {
            transform: scale(1.1);
            box-shadow: 0 8px 25px rgba(37, 211, 102, 0.7);
        }

        /* Mobile Menu Toggle */
        .mobile-filter-toggle {
            display: none;
            width: 100%;
            padding: 16px;
            background: var(--primary);
            color: white;
            border: none;
            border-radius: 10px;
            font-weight: 600;
            cursor: pointer;
            margin-bottom: 20px;
            transition: var(--transition);
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 10px;
        }

        .mobile-filter-toggle:hover {
            background: var(--primary-dark);
        }

        /* Responsive */
        @media (max-width: 992px) {
            .catalog-layout {
                grid-template-columns: 1fr;
            }

            .sidebar {
                position: static;
                display: none;
            }

            .sidebar.active {
                display: block;
            }

            .mobile-filter-toggle {
                display: flex;
            }

            .products-grid.list-view .product-card {
                flex-direction: column;
            }

            .products-grid.list-view .product-image {
                width: 100%;
                height: 250px;
            }

            .page-hero h1 {
                font-size: 32px;
            }
        }

        @media (max-width: 768px) {
            .header-search {
                width: 100%;
                max-width: 100%;
            }

            .products-grid {
                grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
                gap: 20px;
            }

            .price-presets {
                grid-template-columns: 1fr;
            }

            .view-toggle {
                display: none;
            }
            
            .catalog-header {
                flex-direction: column;
                align-items: flex-start;
            }
            
            .sort-options {
                width: 100%;
            }
            
            .sort-options select {
                flex: 1;
            }
        }